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Initial graph editor and graph instantiation from file.

AnimGraphEditor
Martin Felis 2022-02-11 16:51:18 +01:00
parent fd4785afcd
commit c5b0d1f976
48 changed files with 87227 additions and 41 deletions
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# Apply this style by doing
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name: Build
on: [push, pull_request]
jobs:
build:
runs-on: ubuntu-latest
container:
image: docker://nelarius/imnodes-docker-builder:latest
steps:
# This step uses checkout action: https://github.com/actions/checkout
- name: Checkout
uses: actions/checkout@v2
id: checkout
- name: premake5
run: premake5 gmake --sdl-include-path=/usr/include/SDL2
- name: make-debug
run: make all config=debug -j
- name: make-release
run: make all config=release -j

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MIT License
Copyright (c) 2019 Johann Muszynski
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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<h1 align="center">imnodes</h1>
<p align="center">A small, dependency-free node editor extension for <a href="https://github.com/ocornut/imgui">dear imgui</a>.</p>
<p align="center">
<img src="https://raw.githubusercontent.com/Nelarius/imnodes/master/img/imnodes.gif?token=ADH_jEpqbBrw0nH-BUmOip490dyO2CnRks5cVZllwA%3D%3D">
</p>
[![Build Status](https://github.com/nelarius/imnodes/workflows/Build/badge.svg)](https://github.com/nelarius/imnodes/actions?workflow=Build)
Features:
* Create nodes, links, and pins in an immediate-mode style
* Single header and source file, just copy-paste `imnodes.h`, `imnodes_internal.h`, and `imnodes.cpp` into your project. The only dependency is `dear imgui` itself!
* Written in the same style of C++ as `dear imgui` itself -- no modern C++ used
* Use regular `dear imgui` widgets inside the nodes
* Multiple node and link selection with a box selector
* Nodes, links, and pins are fully customizable, from color style to layout
* Default themes match `dear imgui`'s default themes
Scroll down for a brief tour, known issues, and further information!
## Build the examples
This repository includes a few example files, under `example/`. You can copy-paste them into your own imgui project, or you can build them here, in this repository. To build here:
* SDL2 needs to be installed
* premake5 is used to generate the build files
```bash
# Assuming you've installed SDL2 via vcpkg, for instance
$ premake5 gmake \
--sdl-include-path=/Users/nelarius/vcpkg/installed/x64-osx/include/SDL2 \
--sdl-link-path=/Users/nelarius/vcpkg/installed/x64-osx/lib
# Or alternatively, if you are on MacOS and have the SDL2 framework installed
$ premake5 gmake --use-sdl-framework
$ make all -j
```
## A brief tour
Here is a small overview of how the extension is used. For more information on example usage, scroll to the bottom of the README.
Before anything can be done, the library must be initialized. This can be done at the same time as `dear imgui` initialization.
```cpp
ImGui::CreateContext();
ImNodes::CreateContext();
// elsewhere in the code...
ImNodes::DestroyContext();
ImGui::DestroyContext();
```
The node editor is a workspace which contains nodes. The node editor must be instantiated within a window, like any other UI element.
```cpp
ImGui::Begin("node editor");
ImNodes::BeginNodeEditor();
ImNodes::EndNodeEditor();
ImGui::End();
```
Now you should have a workspace with a grid visible in the window. An empty node can now be instantiated:
```cpp
const int hardcoded_node_id = 1;
ImNodes::BeginNodeEditor();
ImNodes::BeginNode(hardcoded_node_id);
ImGui::Dummy(ImVec2(80.0f, 45.0f));
ImNodes::EndNode();
ImNodes::EndNodeEditor();
```
Nodes, like windows in `dear imgui` must be uniquely identified. But we can't use the node titles for identification, because it should be possible to have many nodes of the same name in the workspace. Instead, you just use integers for identification.
Attributes are the UI content of the node. An attribute will have a pin (the little circle) on either side of the node. There are two types of attributes: input, and output attributes. Input attribute pins are on the left side of the node, and output attribute pins are on the right. Like nodes, pins must be uniquely identified.
```cpp
ImNodes::BeginNode(hardcoded_node_id);
const int output_attr_id = 2;
ImNodes::BeginOutputAttribute(output_attr_id);
// in between Begin|EndAttribute calls, you can call ImGui
// UI functions
ImGui::Text("output pin");
ImNodes::EndOutputAttribute();
ImNodes::EndNode();
```
The extension doesn't really care what is in the attribute. It just renders the pin for the attribute, and allows the user to create links between pins.
A title bar can be added to the node using `BeginNodeTitleBar` and `EndNodeTitleBar`. Like attributes, you place your title bar's content between the function calls. Note that these functions have to be called before adding attributes or other `dear imgui` UI elements to the node, since the node's layout is built in order, top-to-bottom.
```cpp
ImNodes::BeginNode(hardcoded_node_id);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("output node");
ImNodes::EndNodeTitleBar();
// pins and other node UI content omitted...
ImNodes::EndNode();
```
The user has to render their own links between nodes as well. A link is a curve which connects two attributes. A link is just a pair of attribute ids. And like nodes and attributes, links too have to be identified by unique integer values:
```cpp
std::vector<std::pair<int, int>> links;
// elsewhere in the code...
for (int i = 0; i < links.size(); ++i)
{
const std::pair<int, int> p = links[i];
// in this case, we just use the array index of the link
// as the unique identifier
ImNodes::Link(i, p.first, p.second);
}
```
After `EndNodeEditor` has been called, you can check if a link was created during the frame with the function call `IsLinkCreated`:
```cpp
int start_attr, end_attr;
if (ImNodes::IsLinkCreated(&start_attr, &end_attr))
{
links.push_back(std::make_pair(start_attr, end_attr));
}
```
In addition to checking for new links, you can also check whether UI elements are being hovered over by the mouse cursor:
```cpp
int node_id;
if (ImNodes::IsNodeHovered(&node_id))
{
node_hovered = node_id;
}
```
You can also check to see if any node has been selected. Nodes can be clicked on, or they can be selected by clicking and dragging the box selector over them.
```cpp
// Note that since many nodes can be selected at once, we first need to query the number of
// selected nodes before getting them.
const int num_selected_nodes = ImNodes::NumSelectedNodes();
if (num_selected_nodes > 0)
{
std::vector<int> selected_nodes;
selected_nodes.resize(num_selected_nodes);
ImNodes::GetSelectedNodes(selected_nodes.data());
}
```
See `imnodes.h` for more UI event-related functions.
Like `dear imgui`, the style of the UI can be changed. You can set the color style of individual nodes, pins, and links mid-frame by calling `ImNodes::PushColorStyle` and `ImNodes::PopColorStyle`.
```cpp
// set the titlebar color of an individual node
ImNodes::PushColorStyle(
ImNodesCol_TitleBar, IM_COL32(11, 109, 191, 255));
ImNodes::PushColorStyle(
ImNodesCol_TitleBarSelected, IM_COL32(81, 148, 204, 255));
ImNodes::BeginNode(hardcoded_node_id);
// node internals here...
ImNodes::EndNode();
ImNodes::PopColorStyle();
ImNodes::PopColorStyle();
```
If the style is not being set mid-frame, `ImNodes::GetStyle` can be called instead, and the values can be set into the style array directly.
```cpp
// set the titlebar color for all nodes
ImNodesStyle& style = ImNodes::GetStyle();
style.colors[ImNodesCol_TitleBar] = IM_COL32(232, 27, 86, 255);
style.colors[ImNodesCol_TitleBarSelected] = IM_COL32(241, 108, 146, 255);
```
To handle quicker navigation of large graphs you can use an interactive mini-map overlay. The mini-map can be zoomed and scrolled. Editor nodes will track the panning of the mini-map accordingly.
```cpp
ImGui::Begin("node editor");
ImNodes::BeginNodeEditor();
// add nodes...
// must be called right before EndNodeEditor
ImNodes::MiniMap();
ImNodes::EndNodeEditor();
ImGui::End();
```
The relative sizing and corner location of the mini-map in the editor space can be specified like so:
```cpp
// MiniMap is a square region with a side length that is 20% the largest editor canvas dimension
// See ImNodesMiniMapLocation_ for other corner locations
ImNodes::MiniMap(0.2f, ImNodesMiniMapLocation_TopRight);
```
The mini-map also supports limited node hovering customization through a user-defined callback.
```cpp
// User callback
void mini_map_node_hovering_callback(int node_id, void* user_data)
{
ImGui::SetTooltip("This is node %d", node_id);
}
// Later on...
ImNodes::MiniMap(0.2f, ImNodesMiniMapLocation_TopRight, mini_map_node_hovering_callback, custom_user_data);
// 'custom_user_data' can be used to supply extra information needed for drawing within the callback
```
## Customizing ImNodes
ImNodes can be customized by providing an `imnodes_config.h` header and specifying defining `IMNODES_USER_CONFIG=imnodes_config.h` when compiling.
It is currently possible to override the type of the minimap hovering callback function. This is useful when generating bindings for another language.
Here's an example imnodes_config.h, which generates a pybind wrapper for the callback.
```cpp
#pragma once
#include <pybind11/functional.h>
namespace pybind11 {
inline bool PyWrapper_Check(PyObject *o) { return true; }
class wrapper : public object {
public:
PYBIND11_OBJECT_DEFAULT(wrapper, object, PyWrapper_Check)
wrapper(void* x) { m_ptr = (PyObject*)x; }
explicit operator bool() const { return m_ptr != nullptr && m_ptr != Py_None; }
};
} //namespace pybind11
namespace py = pybind11;
#define ImNodesMiniMapNodeHoveringCallback py::wrapper
#define ImNodesMiniMapNodeHoveringCallbackUserData py::wrapper
```
## Known issues
* `ImGui::Separator()` spans the current window span. As a result, using a separator inside a node will result in the separator spilling out of the node into the node editor grid.
## Further information
See the `examples/` directory to see library usage in greater detail.
* simple.cpp is a simple hello-world style program which displays two nodes
* save_load.cpp is enables you to add and remove nodes and links, and serializes/deserializes them, so that the program state is retained between restarting the program
* color_node_editor.cpp is a more complete example, which shows how a simple node editor is implemented with a graph.

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The MIT License (MIT)
Copyright (c) 2014-2021 Omar Cornut
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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//-----------------------------------------------------------------------------
// COMPILE-TIME OPTIONS FOR DEAR IMGUI
// Runtime options (clipboard callbacks, enabling various features, etc.) can generally be set via the ImGuiIO structure.
// You can use ImGui::SetAllocatorFunctions() before calling ImGui::CreateContext() to rewire memory allocation functions.
//-----------------------------------------------------------------------------
// A) You may edit imconfig.h (and not overwrite it when updating Dear ImGui, or maintain a patch/rebased branch with your modifications to it)
// B) or '#define IMGUI_USER_CONFIG "my_imgui_config.h"' in your project and then add directives in your own file without touching this template.
//-----------------------------------------------------------------------------
// You need to make sure that configuration settings are defined consistently _everywhere_ Dear ImGui is used, which include the imgui*.cpp
// files but also _any_ of your code that uses Dear ImGui. This is because some compile-time options have an affect on data structures.
// Defining those options in imconfig.h will ensure every compilation unit gets to see the same data structure layouts.
// Call IMGUI_CHECKVERSION() from your .cpp files to verify that the data structures your files are using are matching the ones imgui.cpp is using.
//-----------------------------------------------------------------------------
#pragma once
//---- Define assertion handler. Defaults to calling assert().
// If your macro uses multiple statements, make sure is enclosed in a 'do { .. } while (0)' block so it can be used as a single statement.
//#define IM_ASSERT(_EXPR) MyAssert(_EXPR)
//#define IM_ASSERT(_EXPR) ((void)(_EXPR)) // Disable asserts
//---- Define attributes of all API symbols declarations, e.g. for DLL under Windows
// Using Dear ImGui via a shared library is not recommended, because of function call overhead and because we don't guarantee backward nor forward ABI compatibility.
// DLL users: heaps and globals are not shared across DLL boundaries! You will need to call SetCurrentContext() + SetAllocatorFunctions()
// for each static/DLL boundary you are calling from. Read "Context and Memory Allocators" section of imgui.cpp for more details.
//#define IMGUI_API __declspec( dllexport )
//#define IMGUI_API __declspec( dllimport )
//---- Don't define obsolete functions/enums/behaviors. Consider enabling from time to time after updating to avoid using soon-to-be obsolete function/names.
//#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS
//---- Disable all of Dear ImGui or don't implement standard windows.
// It is very strongly recommended to NOT disable the demo windows during development. Please read comments in imgui_demo.cpp.
//#define IMGUI_DISABLE // Disable everything: all headers and source files will be empty.
//#define IMGUI_DISABLE_DEMO_WINDOWS // Disable demo windows: ShowDemoWindow()/ShowStyleEditor() will be empty. Not recommended.
//#define IMGUI_DISABLE_METRICS_WINDOW // Disable metrics/debugger window: ShowMetricsWindow() will be empty.
//---- Don't implement some functions to reduce linkage requirements.
//#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS // [Win32] Don't implement default clipboard handler. Won't use and link with OpenClipboard/GetClipboardData/CloseClipboard etc. (user32.lib/.a, kernel32.lib/.a)
//#define IMGUI_ENABLE_WIN32_DEFAULT_IME_FUNCTIONS // [Win32] [Default with Visual Studio] Implement default IME handler (require imm32.lib/.a, auto-link for Visual Studio, -limm32 on command-line for MinGW)
//#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS // [Win32] [Default with non-Visual Studio compilers] Don't implement default IME handler (won't require imm32.lib/.a)
//#define IMGUI_DISABLE_WIN32_FUNCTIONS // [Win32] Won't use and link with any Win32 function (clipboard, ime).
//#define IMGUI_ENABLE_OSX_DEFAULT_CLIPBOARD_FUNCTIONS // [OSX] Implement default OSX clipboard handler (need to link with '-framework ApplicationServices', this is why this is not the default).
//#define IMGUI_DISABLE_DEFAULT_FORMAT_FUNCTIONS // Don't implement ImFormatString/ImFormatStringV so you can implement them yourself (e.g. if you don't want to link with vsnprintf)
//#define IMGUI_DISABLE_DEFAULT_MATH_FUNCTIONS // Don't implement ImFabs/ImSqrt/ImPow/ImFmod/ImCos/ImSin/ImAcos/ImAtan2 so you can implement them yourself.
//#define IMGUI_DISABLE_FILE_FUNCTIONS // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite and ImFileHandle at all (replace them with dummies)
//#define IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite and ImFileHandle so you can implement them yourself if you don't want to link with fopen/fclose/fread/fwrite. This will also disable the LogToTTY() function.
//#define IMGUI_DISABLE_DEFAULT_ALLOCATORS // Don't implement default allocators calling malloc()/free() to avoid linking with them. You will need to call ImGui::SetAllocatorFunctions().
//#define IMGUI_DISABLE_SSE // Disable use of SSE intrinsics even if available
//---- Include imgui_user.h at the end of imgui.h as a convenience
//#define IMGUI_INCLUDE_IMGUI_USER_H
//---- Pack colors to BGRA8 instead of RGBA8 (to avoid converting from one to another)
//#define IMGUI_USE_BGRA_PACKED_COLOR
//---- Use 32-bit for ImWchar (default is 16-bit) to support unicode planes 1-16. (e.g. point beyond 0xFFFF like emoticons, dingbats, symbols, shapes, ancient languages, etc...)
//#define IMGUI_USE_WCHAR32
//---- Avoid multiple STB libraries implementations, or redefine path/filenames to prioritize another version
// By default the embedded implementations are declared static and not available outside of Dear ImGui sources files.
//#define IMGUI_STB_TRUETYPE_FILENAME "my_folder/stb_truetype.h"
//#define IMGUI_STB_RECT_PACK_FILENAME "my_folder/stb_rect_pack.h"
//#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
//#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
//---- Use stb_printf's faster implementation of vsnprintf instead of the one from libc (unless IMGUI_DISABLE_DEFAULT_FORMAT_FUNCTIONS is defined)
// Requires 'stb_sprintf.h' to be available in the include path. Compatibility checks of arguments and formats done by clang and GCC will be disabled in order to support the extra formats provided by STB sprintf.
// #define IMGUI_USE_STB_SPRINTF
//---- Use FreeType to build and rasterize the font atlas (instead of stb_truetype which is embedded by default in Dear ImGui)
// Requires FreeType headers to be available in the include path. Requires program to be compiled with 'misc/freetype/imgui_freetype.cpp' (in this repository) + the FreeType library (not provided).
// On Windows you may use vcpkg with 'vcpkg install freetype --triplet=x64-windows' + 'vcpkg integrate install'.
//#define IMGUI_ENABLE_FREETYPE
//---- Use stb_truetype to build and rasterize the font atlas (default)
// The only purpose of this define is if you want force compilation of the stb_truetype backend ALONG with the FreeType backend.
//#define IMGUI_ENABLE_STB_TRUETYPE
//---- Define constructor and implicit cast operators to convert back<>forth between your math types and ImVec2/ImVec4.
// This will be inlined as part of ImVec2 and ImVec4 class declarations.
/*
#define IM_VEC2_CLASS_EXTRA \
ImVec2(const MyVec2& f) { x = f.x; y = f.y; } \
operator MyVec2() const { return MyVec2(x,y); }
#define IM_VEC4_CLASS_EXTRA \
ImVec4(const MyVec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; } \
operator MyVec4() const { return MyVec4(x,y,z,w); }
*/
//---- Use 32-bit vertex indices (default is 16-bit) is one way to allow large meshes with more than 64K vertices.
// Your renderer backend will need to support it (most example renderer backends support both 16/32-bit indices).
// Another way to allow large meshes while keeping 16-bit indices is to handle ImDrawCmd::VtxOffset in your renderer.
// Read about ImGuiBackendFlags_RendererHasVtxOffset for details.
//#define ImDrawIdx unsigned int
//---- Override ImDrawCallback signature (will need to modify renderer backends accordingly)
//struct ImDrawList;
//struct ImDrawCmd;
//typedef void (*MyImDrawCallback)(const ImDrawList* draw_list, const ImDrawCmd* cmd, void* my_renderer_user_data);
//#define ImDrawCallback MyImDrawCallback
//---- Debug Tools: Macro to break in Debugger
// (use 'Metrics->Tools->Item Picker' to pick widgets with the mouse and break into them for easy debugging.)
//#define IM_DEBUG_BREAK IM_ASSERT(0)
//#define IM_DEBUG_BREAK __debugbreak()
//---- Debug Tools: Have the Item Picker break in the ItemAdd() function instead of ItemHoverable(),
// (which comes earlier in the code, will catch a few extra items, allow picking items other than Hovered one.)
// This adds a small runtime cost which is why it is not enabled by default.
//#define IMGUI_DEBUG_TOOL_ITEM_PICKER_EX
//---- Debug Tools: Enable slower asserts
//#define IMGUI_DEBUG_PARANOID
//---- Tip: You can add extra functions within the ImGui:: namespace, here or in your own headers files.
/*
namespace ImGui
{
void MyFunction(const char* name, const MyMatrix44& v);
}
*/

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// dear imgui: Renderer Backend for modern OpenGL with shaders / programmatic pipeline
// - Desktop GL: 2.x 3.x 4.x
// - Embedded GL: ES 2.0 (WebGL 1.0), ES 3.0 (WebGL 2.0)
// This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
// Implemented features:
// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
// [x] Renderer: Desktop GL only: Support for large meshes (64k+ vertices) with 16-bit indices.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2021-08-23: OpenGL: Fixed ES 3.0 shader ("#version 300 es") use normal precision floats to avoid wobbly rendering at HD resolutions.
// 2021-08-19: OpenGL: Embed and use our own minimal GL loader (imgui_impl_opengl3_loader.h), removing requirement and support for third-party loader.
// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
// 2021-06-25: OpenGL: Use OES_vertex_array extension on Emscripten + backup/restore current state.
// 2021-06-21: OpenGL: Destroy individual vertex/fragment shader objects right after they are linked into the main shader.
// 2021-05-24: OpenGL: Access GL_CLIP_ORIGIN when "GL_ARB_clip_control" extension is detected, inside of just OpenGL 4.5 version.
// 2021-05-19: OpenGL: Replaced direct access to ImDrawCmd::TextureId with a call to ImDrawCmd::GetTexID(). (will become a requirement)
// 2021-04-06: OpenGL: Don't try to read GL_CLIP_ORIGIN unless we're OpenGL 4.5 or greater.
// 2021-02-18: OpenGL: Change blending equation to preserve alpha in output buffer.
// 2021-01-03: OpenGL: Backup, setup and restore GL_STENCIL_TEST state.
// 2020-10-23: OpenGL: Backup, setup and restore GL_PRIMITIVE_RESTART state.
// 2020-10-15: OpenGL: Use glGetString(GL_VERSION) instead of glGetIntegerv(GL_MAJOR_VERSION, ...) when the later returns zero (e.g. Desktop GL 2.x)
// 2020-09-17: OpenGL: Fix to avoid compiling/calling glBindSampler() on ES or pre 3.3 context which have the defines set by a loader.
// 2020-07-10: OpenGL: Added support for glad2 OpenGL loader.
// 2020-05-08: OpenGL: Made default GLSL version 150 (instead of 130) on OSX.
// 2020-04-21: OpenGL: Fixed handling of glClipControl(GL_UPPER_LEFT) by inverting projection matrix.
// 2020-04-12: OpenGL: Fixed context version check mistakenly testing for 4.0+ instead of 3.2+ to enable ImGuiBackendFlags_RendererHasVtxOffset.
// 2020-03-24: OpenGL: Added support for glbinding 2.x OpenGL loader.
// 2020-01-07: OpenGL: Added support for glbinding 3.x OpenGL loader.
// 2019-10-25: OpenGL: Using a combination of GL define and runtime GL version to decide whether to use glDrawElementsBaseVertex(). Fix building with pre-3.2 GL loaders.
// 2019-09-22: OpenGL: Detect default GL loader using __has_include compiler facility.
// 2019-09-16: OpenGL: Tweak initialization code to allow application calling ImGui_ImplOpenGL3_CreateFontsTexture() before the first NewFrame() call.
// 2019-05-29: OpenGL: Desktop GL only: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
// 2019-04-30: OpenGL: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
// 2019-03-29: OpenGL: Not calling glBindBuffer more than necessary in the render loop.
// 2019-03-15: OpenGL: Added a GL call + comments in ImGui_ImplOpenGL3_Init() to detect uninitialized GL function loaders early.
// 2019-03-03: OpenGL: Fix support for ES 2.0 (WebGL 1.0).
// 2019-02-20: OpenGL: Fix for OSX not supporting OpenGL 4.5, we don't try to read GL_CLIP_ORIGIN even if defined by the headers/loader.
// 2019-02-11: OpenGL: Projecting clipping rectangles correctly using draw_data->FramebufferScale to allow multi-viewports for retina display.
// 2019-02-01: OpenGL: Using GLSL 410 shaders for any version over 410 (e.g. 430, 450).
// 2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
// 2018-11-13: OpenGL: Support for GL 4.5's glClipControl(GL_UPPER_LEFT) / GL_CLIP_ORIGIN.
// 2018-08-29: OpenGL: Added support for more OpenGL loaders: glew and glad, with comments indicative that any loader can be used.
// 2018-08-09: OpenGL: Default to OpenGL ES 3 on iOS and Android. GLSL version default to "#version 300 ES".
// 2018-07-30: OpenGL: Support for GLSL 300 ES and 410 core. Fixes for Emscripten compilation.
// 2018-07-10: OpenGL: Support for more GLSL versions (based on the GLSL version string). Added error output when shaders fail to compile/link.
// 2018-06-08: Misc: Extracted imgui_impl_opengl3.cpp/.h away from the old combined GLFW/SDL+OpenGL3 examples.
// 2018-06-08: OpenGL: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
// 2018-05-25: OpenGL: Removed unnecessary backup/restore of GL_ELEMENT_ARRAY_BUFFER_BINDING since this is part of the VAO state.
// 2018-05-14: OpenGL: Making the call to glBindSampler() optional so 3.2 context won't fail if the function is a NULL pointer.
// 2018-03-06: OpenGL: Added const char* glsl_version parameter to ImGui_ImplOpenGL3_Init() so user can override the GLSL version e.g. "#version 150".
// 2018-02-23: OpenGL: Create the VAO in the render function so the setup can more easily be used with multiple shared GL context.
// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplSdlGL3_RenderDrawData() in the .h file so you can call it yourself.
// 2018-01-07: OpenGL: Changed GLSL shader version from 330 to 150.
// 2017-09-01: OpenGL: Save and restore current bound sampler. Save and restore current polygon mode.
// 2017-05-01: OpenGL: Fixed save and restore of current blend func state.
// 2017-05-01: OpenGL: Fixed save and restore of current GL_ACTIVE_TEXTURE.
// 2016-09-05: OpenGL: Fixed save and restore of current scissor rectangle.
// 2016-07-29: OpenGL: Explicitly setting GL_UNPACK_ROW_LENGTH to reduce issues because SDL changes it. (#752)
//----------------------------------------
// OpenGL GLSL GLSL
// version version string
//----------------------------------------
// 2.0 110 "#version 110"
// 2.1 120 "#version 120"
// 3.0 130 "#version 130"
// 3.1 140 "#version 140"
// 3.2 150 "#version 150"
// 3.3 330 "#version 330 core"
// 4.0 400 "#version 400 core"
// 4.1 410 "#version 410 core"
// 4.2 420 "#version 410 core"
// 4.3 430 "#version 430 core"
// ES 2.0 100 "#version 100" = WebGL 1.0
// ES 3.0 300 "#version 300 es" = WebGL 2.0
//----------------------------------------
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#include "imgui.h"
#include "imgui_impl_opengl3.h"
#include <stdio.h>
#if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
#include <stddef.h> // intptr_t
#else
#include <stdint.h> // intptr_t
#endif
// GL includes
#if defined(IMGUI_IMPL_OPENGL_ES2)
#include <GLES2/gl2.h>
#if defined(__EMSCRIPTEN__)
#ifndef GL_GLEXT_PROTOTYPES
#define GL_GLEXT_PROTOTYPES
#endif
#include <GLES2/gl2ext.h>
#endif
#elif defined(IMGUI_IMPL_OPENGL_ES3)
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
#include <OpenGLES/ES3/gl.h> // Use GL ES 3
#else
#include <GLES3/gl3.h> // Use GL ES 3
#endif
#elif !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
// Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
// Helper libraries are often used for this purpose! Here we are using our own minimal custom loader based on gl3w.
// In the rest of your app/engine, you can use another loader of your choice (gl3w, glew, glad, glbinding, glext, glLoadGen, etc.).
// If you happen to be developing a new feature for this backend (imgui_impl_opengl3.cpp):
// - You may need to regenerate imgui_impl_opengl3_loader.h to add new symbols. See https://github.com/dearimgui/gl3w_stripped
// - You can temporarily use an unstripped version. See https://github.com/dearimgui/gl3w_stripped/releases
// Changes to this backend using new APIs should be accompanied by a regenerated stripped loader version.
#define IMGL3W_IMPL
#include "imgui_impl_opengl3_loader.h"
#endif
// Vertex arrays are not supported on ES2/WebGL1 unless Emscripten which uses an extension
#ifndef IMGUI_IMPL_OPENGL_ES2
#define IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
#elif defined(__EMSCRIPTEN__)
#define IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
#define glBindVertexArray glBindVertexArrayOES
#define glGenVertexArrays glGenVertexArraysOES
#define glDeleteVertexArrays glDeleteVertexArraysOES
#define GL_VERTEX_ARRAY_BINDING GL_VERTEX_ARRAY_BINDING_OES
#endif
// Desktop GL 2.0+ has glPolygonMode() which GL ES and WebGL don't have.
#ifdef GL_POLYGON_MODE
#define IMGUI_IMPL_HAS_POLYGON_MODE
#endif
// Desktop GL 3.2+ has glDrawElementsBaseVertex() which GL ES and WebGL don't have.
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_2)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
#endif
// Desktop GL 3.3+ has glBindSampler()
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_3)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
#endif
// Desktop GL 3.1+ has GL_PRIMITIVE_RESTART state
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_1)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
#endif
// Desktop GL use extension detection
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3)
#define IMGUI_IMPL_OPENGL_MAY_HAVE_EXTENSIONS
#endif
// OpenGL Data
struct ImGui_ImplOpenGL3_Data
{
GLuint GlVersion; // Extracted at runtime using GL_MAJOR_VERSION, GL_MINOR_VERSION queries (e.g. 320 for GL 3.2)
char GlslVersionString[32]; // Specified by user or detected based on compile time GL settings.
GLuint FontTexture;
GLuint ShaderHandle;
GLint AttribLocationTex; // Uniforms location
GLint AttribLocationProjMtx;
GLuint AttribLocationVtxPos; // Vertex attributes location
GLuint AttribLocationVtxUV;
GLuint AttribLocationVtxColor;
unsigned int VboHandle, ElementsHandle;
bool HasClipOrigin;
ImGui_ImplOpenGL3_Data() { memset(this, 0, sizeof(*this)); }
};
// Backend data stored in io.BackendRendererUserData to allow support for multiple Dear ImGui contexts
// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts.
static ImGui_ImplOpenGL3_Data* ImGui_ImplOpenGL3_GetBackendData()
{
return ImGui::GetCurrentContext() ? (ImGui_ImplOpenGL3_Data*)ImGui::GetIO().BackendRendererUserData : NULL;
}
// Functions
bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
{
ImGuiIO& io = ImGui::GetIO();
IM_ASSERT(io.BackendRendererUserData == NULL && "Already initialized a renderer backend!");
// Initialize our loader
#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
if (imgl3wInit() != 0)
{
fprintf(stderr, "Failed to initialize OpenGL loader!\n");
return false;
}
#endif
// Setup backend capabilities flags
ImGui_ImplOpenGL3_Data* bd = IM_NEW(ImGui_ImplOpenGL3_Data)();
io.BackendRendererUserData = (void*)bd;
io.BackendRendererName = "imgui_impl_opengl3";
// Query for GL version (e.g. 320 for GL 3.2)
#if !defined(IMGUI_IMPL_OPENGL_ES2)
GLint major = 0;
GLint minor = 0;
glGetIntegerv(GL_MAJOR_VERSION, &major);
glGetIntegerv(GL_MINOR_VERSION, &minor);
if (major == 0 && minor == 0)
{
// Query GL_VERSION in desktop GL 2.x, the string will start with "<major>.<minor>"
const char* gl_version = (const char*)glGetString(GL_VERSION);
sscanf(gl_version, "%d.%d", &major, &minor);
}
bd->GlVersion = (GLuint)(major * 100 + minor * 10);
#else
bd->GlVersion = 200; // GLES 2
#endif
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
if (bd->GlVersion >= 320)
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
#endif
// Store GLSL version string so we can refer to it later in case we recreate shaders.
// Note: GLSL version is NOT the same as GL version. Leave this to NULL if unsure.
if (glsl_version == NULL)
{
#if defined(IMGUI_IMPL_OPENGL_ES2)
glsl_version = "#version 100";
#elif defined(IMGUI_IMPL_OPENGL_ES3)
glsl_version = "#version 300 es";
#elif defined(__APPLE__)
glsl_version = "#version 150";
#else
glsl_version = "#version 130";
#endif
}
IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(bd->GlslVersionString));
strcpy(bd->GlslVersionString, glsl_version);
strcat(bd->GlslVersionString, "\n");
// Make an arbitrary GL call (we don't actually need the result)
// IF YOU GET A CRASH HERE: it probably means the OpenGL function loader didn't do its job. Let us know!
GLint current_texture;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
// Detect extensions we support
bd->HasClipOrigin = (bd->GlVersion >= 450);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_EXTENSIONS
GLint num_extensions = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
for (GLint i = 0; i < num_extensions; i++)
{
const char* extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
if (extension != NULL && strcmp(extension, "GL_ARB_clip_control") == 0)
bd->HasClipOrigin = true;
}
#endif
return true;
}
void ImGui_ImplOpenGL3_Shutdown()
{
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
ImGui_ImplOpenGL3_DestroyDeviceObjects();
io.BackendRendererName = NULL;
io.BackendRendererUserData = NULL;
IM_DELETE(bd);
}
void ImGui_ImplOpenGL3_NewFrame()
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
IM_ASSERT(bd != NULL && "Did you call ImGui_ImplOpenGL3_Init()?");
if (!bd->ShaderHandle)
ImGui_ImplOpenGL3_CreateDeviceObjects();
}
static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height, GLuint vertex_array_object)
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, polygon fill
glEnable(GL_BLEND);
glBlendEquation(GL_FUNC_ADD);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glDisable(GL_STENCIL_TEST);
glEnable(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
if (bd->GlVersion >= 310)
glDisable(GL_PRIMITIVE_RESTART);
#endif
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
#endif
// Support for GL 4.5 rarely used glClipControl(GL_UPPER_LEFT)
#if defined(GL_CLIP_ORIGIN)
bool clip_origin_lower_left = true;
if (bd->HasClipOrigin)
{
GLenum current_clip_origin = 0; glGetIntegerv(GL_CLIP_ORIGIN, (GLint*)&current_clip_origin);
if (current_clip_origin == GL_UPPER_LEFT)
clip_origin_lower_left = false;
}
#endif
// Setup viewport, orthographic projection matrix
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height);
float L = draw_data->DisplayPos.x;
float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
float T = draw_data->DisplayPos.y;
float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
#if defined(GL_CLIP_ORIGIN)
if (!clip_origin_lower_left) { float tmp = T; T = B; B = tmp; } // Swap top and bottom if origin is upper left
#endif
const float ortho_projection[4][4] =
{
{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
{ 0.0f, 0.0f, -1.0f, 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), 0.0f, 1.0f },
};
glUseProgram(bd->ShaderHandle);
glUniform1i(bd->AttribLocationTex, 0);
glUniformMatrix4fv(bd->AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
if (bd->GlVersion >= 330)
glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 may set that otherwise.
#endif
(void)vertex_array_object;
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glBindVertexArray(vertex_array_object);
#endif
// Bind vertex/index buffers and setup attributes for ImDrawVert
glBindBuffer(GL_ARRAY_BUFFER, bd->VboHandle);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bd->ElementsHandle);
glEnableVertexAttribArray(bd->AttribLocationVtxPos);
glEnableVertexAttribArray(bd->AttribLocationVtxUV);
glEnableVertexAttribArray(bd->AttribLocationVtxColor);
glVertexAttribPointer(bd->AttribLocationVtxPos, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos));
glVertexAttribPointer(bd->AttribLocationVtxUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv));
glVertexAttribPointer(bd->AttribLocationVtxColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col));
}
// OpenGL3 Render function.
// Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly.
// This is in order to be able to run within an OpenGL engine that doesn't do so.
void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
{
// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
if (fb_width <= 0 || fb_height <= 0)
return;
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
// Backup GL state
GLenum last_active_texture; glGetIntegerv(GL_ACTIVE_TEXTURE, (GLint*)&last_active_texture);
glActiveTexture(GL_TEXTURE0);
GLuint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, (GLint*)&last_program);
GLuint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&last_texture);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
GLuint last_sampler; if (bd->GlVersion >= 330) { glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler); } else { last_sampler = 0; }
#endif
GLuint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)&last_array_buffer);
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
GLuint last_vertex_array_object; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, (GLint*)&last_vertex_array_object);
#endif
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
#endif
GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
GLint last_scissor_box[4]; glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box);
GLenum last_blend_src_rgb; glGetIntegerv(GL_BLEND_SRC_RGB, (GLint*)&last_blend_src_rgb);
GLenum last_blend_dst_rgb; glGetIntegerv(GL_BLEND_DST_RGB, (GLint*)&last_blend_dst_rgb);
GLenum last_blend_src_alpha; glGetIntegerv(GL_BLEND_SRC_ALPHA, (GLint*)&last_blend_src_alpha);
GLenum last_blend_dst_alpha; glGetIntegerv(GL_BLEND_DST_ALPHA, (GLint*)&last_blend_dst_alpha);
GLenum last_blend_equation_rgb; glGetIntegerv(GL_BLEND_EQUATION_RGB, (GLint*)&last_blend_equation_rgb);
GLenum last_blend_equation_alpha; glGetIntegerv(GL_BLEND_EQUATION_ALPHA, (GLint*)&last_blend_equation_alpha);
GLboolean last_enable_blend = glIsEnabled(GL_BLEND);
GLboolean last_enable_cull_face = glIsEnabled(GL_CULL_FACE);
GLboolean last_enable_depth_test = glIsEnabled(GL_DEPTH_TEST);
GLboolean last_enable_stencil_test = glIsEnabled(GL_STENCIL_TEST);
GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
GLboolean last_enable_primitive_restart = (bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
#endif
// Setup desired GL state
// Recreate the VAO every time (this is to easily allow multiple GL contexts to be rendered to. VAO are not shared among GL contexts)
// The renderer would actually work without any VAO bound, but then our VertexAttrib calls would overwrite the default one currently bound.
GLuint vertex_array_object = 0;
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glGenVertexArrays(1, &vertex_array_object);
#endif
ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
// Will project scissor/clipping rectangles into framebuffer space
ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports
ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
// Render command lists
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
// Upload vertex/index buffers
glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.Size * (int)sizeof(ImDrawVert), (const GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.Size * (int)sizeof(ImDrawIdx), (const GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW);
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback != NULL)
{
// User callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
else
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
// Project scissor/clipping rectangles into framebuffer space
ImVec4 clip_rect;
clip_rect.x = (pcmd->ClipRect.x - clip_off.x) * clip_scale.x;
clip_rect.y = (pcmd->ClipRect.y - clip_off.y) * clip_scale.y;
clip_rect.z = (pcmd->ClipRect.z - clip_off.x) * clip_scale.x;
clip_rect.w = (pcmd->ClipRect.w - clip_off.y) * clip_scale.y;
if (clip_rect.x < fb_width && clip_rect.y < fb_height && clip_rect.z >= 0.0f && clip_rect.w >= 0.0f)
{
// Apply scissor/clipping rectangle
glScissor((int)clip_rect.x, (int)(fb_height - clip_rect.w), (int)(clip_rect.z - clip_rect.x), (int)(clip_rect.w - clip_rect.y));
// Bind texture, Draw
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID());
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
if (bd->GlVersion >= 320)
glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset);
else
#endif
glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)));
}
}
}
}
// Destroy the temporary VAO
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glDeleteVertexArrays(1, &vertex_array_object);
#endif
// Restore modified GL state
glUseProgram(last_program);
glBindTexture(GL_TEXTURE_2D, last_texture);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
if (bd->GlVersion >= 330)
glBindSampler(0, last_sampler);
#endif
glActiveTexture(last_active_texture);
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glBindVertexArray(last_vertex_array_object);
#endif
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
glBlendEquationSeparate(last_blend_equation_rgb, last_blend_equation_alpha);
glBlendFuncSeparate(last_blend_src_rgb, last_blend_dst_rgb, last_blend_src_alpha, last_blend_dst_alpha);
if (last_enable_blend) glEnable(GL_BLEND); else glDisable(GL_BLEND);
if (last_enable_cull_face) glEnable(GL_CULL_FACE); else glDisable(GL_CULL_FACE);
if (last_enable_depth_test) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST);
if (last_enable_stencil_test) glEnable(GL_STENCIL_TEST); else glDisable(GL_STENCIL_TEST);
if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
if (bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
#endif
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
glPolygonMode(GL_FRONT_AND_BACK, (GLenum)last_polygon_mode[0]);
#endif
glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]);
glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]);
(void)bd; // Not all compilation paths use this
}
bool ImGui_ImplOpenGL3_CreateFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
// Build texture atlas
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
// Upload texture to graphics system
GLint last_texture;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGenTextures(1, &bd->FontTexture);
glBindTexture(GL_TEXTURE_2D, bd->FontTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
#ifdef GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
#endif
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
// Store our identifier
io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture);
// Restore state
glBindTexture(GL_TEXTURE_2D, last_texture);
return true;
}
void ImGui_ImplOpenGL3_DestroyFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
if (bd->FontTexture)
{
glDeleteTextures(1, &bd->FontTexture);
io.Fonts->SetTexID(0);
bd->FontTexture = 0;
}
}
// If you get an error please report on github. You may try different GL context version or GLSL version. See GL<>GLSL version table at the top of this file.
static bool CheckShader(GLuint handle, const char* desc)
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
GLint status = 0, log_length = 0;
glGetShaderiv(handle, GL_COMPILE_STATUS, &status);
glGetShaderiv(handle, GL_INFO_LOG_LENGTH, &log_length);
if ((GLboolean)status == GL_FALSE)
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to compile %s! With GLSL: %s\n", desc, bd->GlslVersionString);
if (log_length > 1)
{
ImVector<char> buf;
buf.resize((int)(log_length + 1));
glGetShaderInfoLog(handle, log_length, NULL, (GLchar*)buf.begin());
fprintf(stderr, "%s\n", buf.begin());
}
return (GLboolean)status == GL_TRUE;
}
// If you get an error please report on GitHub. You may try different GL context version or GLSL version.
static bool CheckProgram(GLuint handle, const char* desc)
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
GLint status = 0, log_length = 0;
glGetProgramiv(handle, GL_LINK_STATUS, &status);
glGetProgramiv(handle, GL_INFO_LOG_LENGTH, &log_length);
if ((GLboolean)status == GL_FALSE)
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to link %s! With GLSL %s\n", desc, bd->GlslVersionString);
if (log_length > 1)
{
ImVector<char> buf;
buf.resize((int)(log_length + 1));
glGetProgramInfoLog(handle, log_length, NULL, (GLchar*)buf.begin());
fprintf(stderr, "%s\n", buf.begin());
}
return (GLboolean)status == GL_TRUE;
}
bool ImGui_ImplOpenGL3_CreateDeviceObjects()
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
// Backup GL state
GLint last_texture, last_array_buffer;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
GLint last_vertex_array;
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
#endif
// Parse GLSL version string
int glsl_version = 130;
sscanf(bd->GlslVersionString, "#version %d", &glsl_version);
const GLchar* vertex_shader_glsl_120 =
"uniform mat4 ProjMtx;\n"
"attribute vec2 Position;\n"
"attribute vec2 UV;\n"
"attribute vec4 Color;\n"
"varying vec2 Frag_UV;\n"
"varying vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_130 =
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_300_es =
"precision highp float;\n"
"layout (location = 0) in vec2 Position;\n"
"layout (location = 1) in vec2 UV;\n"
"layout (location = 2) in vec4 Color;\n"
"uniform mat4 ProjMtx;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* vertex_shader_glsl_410_core =
"layout (location = 0) in vec2 Position;\n"
"layout (location = 1) in vec2 UV;\n"
"layout (location = 2) in vec4 Color;\n"
"uniform mat4 ProjMtx;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader_glsl_120 =
"#ifdef GL_ES\n"
" precision mediump float;\n"
"#endif\n"
"uniform sampler2D Texture;\n"
"varying vec2 Frag_UV;\n"
"varying vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV.st);\n"
"}\n";
const GLchar* fragment_shader_glsl_130 =
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
"}\n";
const GLchar* fragment_shader_glsl_300_es =
"precision mediump float;\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"layout (location = 0) out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
"}\n";
const GLchar* fragment_shader_glsl_410_core =
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"uniform sampler2D Texture;\n"
"layout (location = 0) out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
"}\n";
// Select shaders matching our GLSL versions
const GLchar* vertex_shader = NULL;
const GLchar* fragment_shader = NULL;
if (glsl_version < 130)
{
vertex_shader = vertex_shader_glsl_120;
fragment_shader = fragment_shader_glsl_120;
}
else if (glsl_version >= 410)
{
vertex_shader = vertex_shader_glsl_410_core;
fragment_shader = fragment_shader_glsl_410_core;
}
else if (glsl_version == 300)
{
vertex_shader = vertex_shader_glsl_300_es;
fragment_shader = fragment_shader_glsl_300_es;
}
else
{
vertex_shader = vertex_shader_glsl_130;
fragment_shader = fragment_shader_glsl_130;
}
// Create shaders
const GLchar* vertex_shader_with_version[2] = { bd->GlslVersionString, vertex_shader };
GLuint vert_handle = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vert_handle, 2, vertex_shader_with_version, NULL);
glCompileShader(vert_handle);
CheckShader(vert_handle, "vertex shader");
const GLchar* fragment_shader_with_version[2] = { bd->GlslVersionString, fragment_shader };
GLuint frag_handle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(frag_handle, 2, fragment_shader_with_version, NULL);
glCompileShader(frag_handle);
CheckShader(frag_handle, "fragment shader");
// Link
bd->ShaderHandle = glCreateProgram();
glAttachShader(bd->ShaderHandle, vert_handle);
glAttachShader(bd->ShaderHandle, frag_handle);
glLinkProgram(bd->ShaderHandle);
CheckProgram(bd->ShaderHandle, "shader program");
glDetachShader(bd->ShaderHandle, vert_handle);
glDetachShader(bd->ShaderHandle, frag_handle);
glDeleteShader(vert_handle);
glDeleteShader(frag_handle);
bd->AttribLocationTex = glGetUniformLocation(bd->ShaderHandle, "Texture");
bd->AttribLocationProjMtx = glGetUniformLocation(bd->ShaderHandle, "ProjMtx");
bd->AttribLocationVtxPos = (GLuint)glGetAttribLocation(bd->ShaderHandle, "Position");
bd->AttribLocationVtxUV = (GLuint)glGetAttribLocation(bd->ShaderHandle, "UV");
bd->AttribLocationVtxColor = (GLuint)glGetAttribLocation(bd->ShaderHandle, "Color");
// Create buffers
glGenBuffers(1, &bd->VboHandle);
glGenBuffers(1, &bd->ElementsHandle);
ImGui_ImplOpenGL3_CreateFontsTexture();
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
glBindVertexArray(last_vertex_array);
#endif
return true;
}
void ImGui_ImplOpenGL3_DestroyDeviceObjects()
{
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
if (bd->VboHandle) { glDeleteBuffers(1, &bd->VboHandle); bd->VboHandle = 0; }
if (bd->ElementsHandle) { glDeleteBuffers(1, &bd->ElementsHandle); bd->ElementsHandle = 0; }
if (bd->ShaderHandle) { glDeleteProgram(bd->ShaderHandle); bd->ShaderHandle = 0; }
ImGui_ImplOpenGL3_DestroyFontsTexture();
}

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// dear imgui: Renderer Backend for modern OpenGL with shaders / programmatic pipeline
// - Desktop GL: 2.x 3.x 4.x
// - Embedded GL: ES 2.0 (WebGL 1.0), ES 3.0 (WebGL 2.0)
// This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
// Implemented features:
// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
// [x] Renderer: Desktop GL only: Support for large meshes (64k+ vertices) with 16-bit indices.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
// About GLSL version:
// The 'glsl_version' initialization parameter should be NULL (default) or a "#version XXX" string.
// On computer platform the GLSL version default to "#version 130". On OpenGL ES 3 platform it defaults to "#version 300 es"
// Only override if your GL version doesn't handle this GLSL version. See GLSL version table at the top of imgui_impl_opengl3.cpp.
#pragma once
#include "imgui.h" // IMGUI_IMPL_API
// Backend API
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_Init(const char* glsl_version = NULL);
IMGUI_IMPL_API void ImGui_ImplOpenGL3_Shutdown();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_NewFrame();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data);
// (Optional) Called by Init/NewFrame/Shutdown
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_CreateFontsTexture();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyFontsTexture();
IMGUI_IMPL_API bool ImGui_ImplOpenGL3_CreateDeviceObjects();
IMGUI_IMPL_API void ImGui_ImplOpenGL3_DestroyDeviceObjects();
// Specific OpenGL ES versions
//#define IMGUI_IMPL_OPENGL_ES2 // Auto-detected on Emscripten
//#define IMGUI_IMPL_OPENGL_ES3 // Auto-detected on iOS/Android
// You can explicitly select GLES2 or GLES3 API by using one of the '#define IMGUI_IMPL_OPENGL_LOADER_XXX' in imconfig.h or compiler command-line.
#if !defined(IMGUI_IMPL_OPENGL_ES2) \
&& !defined(IMGUI_IMPL_OPENGL_ES3)
// Try to detect GLES on matching platforms
#if defined(__APPLE__)
#include "TargetConditionals.h"
#endif
#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV)) || (defined(__ANDROID__))
#define IMGUI_IMPL_OPENGL_ES3 // iOS, Android -> GL ES 3, "#version 300 es"
#elif defined(__EMSCRIPTEN__)
#define IMGUI_IMPL_OPENGL_ES2 // Emscripten -> GL ES 2, "#version 100"
#else
// Otherwise imgui_impl_opengl3_loader.h will be used.
#endif
#endif

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@ -0,0 +1,730 @@
/*
* This file was generated with gl3w_gen.py, part of imgl3w
* (hosted at https://github.com/dearimgui/gl3w_stripped)
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
// We embed our own OpenGL loader to not require user to provide their own or to have to use ours, which proved to be endless problems for users.
// Our loader is custom-generated, based on gl3w but automatically filtered to only include enums/functions that we use in this source file.
// Regenerate with: python gl3w_gen.py --imgui-dir /path/to/imgui/
// see https://github.com/dearimgui/gl3w_stripped for more info.
#ifndef __gl3w_h_
#define __gl3w_h_
// Adapted from KHR/khrplatform.h to avoid including entire file.
typedef float khronos_float_t;
typedef signed char khronos_int8_t;
typedef unsigned char khronos_uint8_t;
typedef signed short int khronos_int16_t;
typedef unsigned short int khronos_uint16_t;
#ifdef _WIN64
typedef signed long long int khronos_intptr_t;
typedef signed long long int khronos_ssize_t;
#else
typedef signed long int khronos_intptr_t;
typedef signed long int khronos_ssize_t;
#endif
#if defined(_MSC_VER) && !defined(__clang__)
typedef signed __int64 khronos_int64_t;
typedef unsigned __int64 khronos_uint64_t;
#elif (defined(__clang__) || defined(__GNUC__)) && (__cplusplus < 201100)
#include <stdint.h>
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#else
typedef signed long long khronos_int64_t;
typedef unsigned long long khronos_uint64_t;
#endif
#ifndef __gl_glcorearb_h_
#define __gl_glcorearb_h_ 1
#ifdef __cplusplus
extern "C" {
#endif
/*
** Copyright 2013-2020 The Khronos Group Inc.
** SPDX-License-Identifier: MIT
**
** This header is generated from the Khronos OpenGL / OpenGL ES XML
** API Registry. The current version of the Registry, generator scripts
** used to make the header, and the header can be found at
** https://github.com/KhronosGroup/OpenGL-Registry
*/
#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
#endif
#ifndef APIENTRY
#define APIENTRY
#endif
#ifndef APIENTRYP
#define APIENTRYP APIENTRY *
#endif
#ifndef GLAPI
#define GLAPI extern
#endif
/* glcorearb.h is for use with OpenGL core profile implementations.
** It should should be placed in the same directory as gl.h and
** included as <GL/glcorearb.h>.
**
** glcorearb.h includes only APIs in the latest OpenGL core profile
** implementation together with APIs in newer ARB extensions which
** can be supported by the core profile. It does not, and never will
** include functionality removed from the core profile, such as
** fixed-function vertex and fragment processing.
**
** Do not #include both <GL/glcorearb.h> and either of <GL/gl.h> or
** <GL/glext.h> in the same source file.
*/
/* Generated C header for:
* API: gl
* Profile: core
* Versions considered: .*
* Versions emitted: .*
* Default extensions included: glcore
* Additional extensions included: _nomatch_^
* Extensions removed: _nomatch_^
*/
#ifndef GL_VERSION_1_0
typedef void GLvoid;
typedef unsigned int GLenum;
typedef khronos_float_t GLfloat;
typedef int GLint;
typedef int GLsizei;
typedef unsigned int GLbitfield;
typedef double GLdouble;
typedef unsigned int GLuint;
typedef unsigned char GLboolean;
typedef khronos_uint8_t GLubyte;
#define GL_COLOR_BUFFER_BIT 0x00004000
#define GL_FALSE 0
#define GL_TRUE 1
#define GL_TRIANGLES 0x0004
#define GL_ONE 1
#define GL_SRC_ALPHA 0x0302
#define GL_ONE_MINUS_SRC_ALPHA 0x0303
#define GL_FRONT_AND_BACK 0x0408
#define GL_POLYGON_MODE 0x0B40
#define GL_CULL_FACE 0x0B44
#define GL_DEPTH_TEST 0x0B71
#define GL_STENCIL_TEST 0x0B90
#define GL_VIEWPORT 0x0BA2
#define GL_BLEND 0x0BE2
#define GL_SCISSOR_BOX 0x0C10
#define GL_SCISSOR_TEST 0x0C11
#define GL_UNPACK_ROW_LENGTH 0x0CF2
#define GL_PACK_ALIGNMENT 0x0D05
#define GL_TEXTURE_2D 0x0DE1
#define GL_UNSIGNED_BYTE 0x1401
#define GL_UNSIGNED_SHORT 0x1403
#define GL_UNSIGNED_INT 0x1405
#define GL_FLOAT 0x1406
#define GL_RGBA 0x1908
#define GL_FILL 0x1B02
#define GL_VERSION 0x1F02
#define GL_EXTENSIONS 0x1F03
#define GL_LINEAR 0x2601
#define GL_TEXTURE_MAG_FILTER 0x2800
#define GL_TEXTURE_MIN_FILTER 0x2801
typedef void (APIENTRYP PFNGLPOLYGONMODEPROC) (GLenum face, GLenum mode);
typedef void (APIENTRYP PFNGLSCISSORPROC) (GLint x, GLint y, GLsizei width, GLsizei height);
typedef void (APIENTRYP PFNGLTEXPARAMETERIPROC) (GLenum target, GLenum pname, GLint param);
typedef void (APIENTRYP PFNGLTEXIMAGE2DPROC) (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const void *pixels);
typedef void (APIENTRYP PFNGLCLEARPROC) (GLbitfield mask);
typedef void (APIENTRYP PFNGLCLEARCOLORPROC) (GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
typedef void (APIENTRYP PFNGLDISABLEPROC) (GLenum cap);
typedef void (APIENTRYP PFNGLENABLEPROC) (GLenum cap);
typedef void (APIENTRYP PFNGLPIXELSTOREIPROC) (GLenum pname, GLint param);
typedef void (APIENTRYP PFNGLREADPIXELSPROC) (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void *pixels);
typedef void (APIENTRYP PFNGLGETINTEGERVPROC) (GLenum pname, GLint *data);
typedef const GLubyte *(APIENTRYP PFNGLGETSTRINGPROC) (GLenum name);
typedef GLboolean (APIENTRYP PFNGLISENABLEDPROC) (GLenum cap);
typedef void (APIENTRYP PFNGLVIEWPORTPROC) (GLint x, GLint y, GLsizei width, GLsizei height);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glPolygonMode (GLenum face, GLenum mode);
GLAPI void APIENTRY glScissor (GLint x, GLint y, GLsizei width, GLsizei height);
GLAPI void APIENTRY glTexParameteri (GLenum target, GLenum pname, GLint param);
GLAPI void APIENTRY glTexImage2D (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const void *pixels);
GLAPI void APIENTRY glClear (GLbitfield mask);
GLAPI void APIENTRY glClearColor (GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
GLAPI void APIENTRY glDisable (GLenum cap);
GLAPI void APIENTRY glEnable (GLenum cap);
GLAPI void APIENTRY glPixelStorei (GLenum pname, GLint param);
GLAPI void APIENTRY glReadPixels (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void *pixels);
GLAPI void APIENTRY glGetIntegerv (GLenum pname, GLint *data);
GLAPI const GLubyte *APIENTRY glGetString (GLenum name);
GLAPI GLboolean APIENTRY glIsEnabled (GLenum cap);
GLAPI void APIENTRY glViewport (GLint x, GLint y, GLsizei width, GLsizei height);
#endif
#endif /* GL_VERSION_1_0 */
#ifndef GL_VERSION_1_1
typedef khronos_float_t GLclampf;
typedef double GLclampd;
#define GL_TEXTURE_BINDING_2D 0x8069
typedef void (APIENTRYP PFNGLDRAWELEMENTSPROC) (GLenum mode, GLsizei count, GLenum type, const void *indices);
typedef void (APIENTRYP PFNGLBINDTEXTUREPROC) (GLenum target, GLuint texture);
typedef void (APIENTRYP PFNGLDELETETEXTURESPROC) (GLsizei n, const GLuint *textures);
typedef void (APIENTRYP PFNGLGENTEXTURESPROC) (GLsizei n, GLuint *textures);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glDrawElements (GLenum mode, GLsizei count, GLenum type, const void *indices);
GLAPI void APIENTRY glBindTexture (GLenum target, GLuint texture);
GLAPI void APIENTRY glDeleteTextures (GLsizei n, const GLuint *textures);
GLAPI void APIENTRY glGenTextures (GLsizei n, GLuint *textures);
#endif
#endif /* GL_VERSION_1_1 */
#ifndef GL_VERSION_1_3
#define GL_TEXTURE0 0x84C0
#define GL_ACTIVE_TEXTURE 0x84E0
typedef void (APIENTRYP PFNGLACTIVETEXTUREPROC) (GLenum texture);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glActiveTexture (GLenum texture);
#endif
#endif /* GL_VERSION_1_3 */
#ifndef GL_VERSION_1_4
#define GL_BLEND_DST_RGB 0x80C8
#define GL_BLEND_SRC_RGB 0x80C9
#define GL_BLEND_DST_ALPHA 0x80CA
#define GL_BLEND_SRC_ALPHA 0x80CB
#define GL_FUNC_ADD 0x8006
typedef void (APIENTRYP PFNGLBLENDFUNCSEPARATEPROC) (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
typedef void (APIENTRYP PFNGLBLENDEQUATIONPROC) (GLenum mode);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glBlendFuncSeparate (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
GLAPI void APIENTRY glBlendEquation (GLenum mode);
#endif
#endif /* GL_VERSION_1_4 */
#ifndef GL_VERSION_1_5
typedef khronos_ssize_t GLsizeiptr;
typedef khronos_intptr_t GLintptr;
#define GL_ARRAY_BUFFER 0x8892
#define GL_ELEMENT_ARRAY_BUFFER 0x8893
#define GL_ARRAY_BUFFER_BINDING 0x8894
#define GL_STREAM_DRAW 0x88E0
typedef void (APIENTRYP PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
typedef void (APIENTRYP PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint *buffers);
typedef void (APIENTRYP PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
typedef void (APIENTRYP PFNGLBUFFERDATAPROC) (GLenum target, GLsizeiptr size, const void *data, GLenum usage);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glBindBuffer (GLenum target, GLuint buffer);
GLAPI void APIENTRY glDeleteBuffers (GLsizei n, const GLuint *buffers);
GLAPI void APIENTRY glGenBuffers (GLsizei n, GLuint *buffers);
GLAPI void APIENTRY glBufferData (GLenum target, GLsizeiptr size, const void *data, GLenum usage);
#endif
#endif /* GL_VERSION_1_5 */
#ifndef GL_VERSION_2_0
typedef char GLchar;
typedef khronos_int16_t GLshort;
typedef khronos_int8_t GLbyte;
typedef khronos_uint16_t GLushort;
#define GL_BLEND_EQUATION_RGB 0x8009
#define GL_BLEND_EQUATION_ALPHA 0x883D
#define GL_FRAGMENT_SHADER 0x8B30
#define GL_VERTEX_SHADER 0x8B31
#define GL_COMPILE_STATUS 0x8B81
#define GL_LINK_STATUS 0x8B82
#define GL_INFO_LOG_LENGTH 0x8B84
#define GL_CURRENT_PROGRAM 0x8B8D
#define GL_UPPER_LEFT 0x8CA2
typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEPROC) (GLenum modeRGB, GLenum modeAlpha);
typedef void (APIENTRYP PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
typedef void (APIENTRYP PFNGLCOMPILESHADERPROC) (GLuint shader);
typedef GLuint (APIENTRYP PFNGLCREATEPROGRAMPROC) (void);
typedef GLuint (APIENTRYP PFNGLCREATESHADERPROC) (GLenum type);
typedef void (APIENTRYP PFNGLDELETEPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP PFNGLDELETESHADERPROC) (GLuint shader);
typedef void (APIENTRYP PFNGLDETACHSHADERPROC) (GLuint program, GLuint shader);
typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
typedef GLint (APIENTRYP PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const GLchar *name);
typedef void (APIENTRYP PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
typedef void (APIENTRYP PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
typedef void (APIENTRYP PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
typedef void (APIENTRYP PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const GLchar *name);
typedef void (APIENTRYP PFNGLLINKPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const GLchar *const*string, const GLint *length);
typedef void (APIENTRYP PFNGLUSEPROGRAMPROC) (GLuint program);
typedef void (APIENTRYP PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
typedef void (APIENTRYP PFNGLUNIFORMMATRIX4FVPROC) (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const void *pointer);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glBlendEquationSeparate (GLenum modeRGB, GLenum modeAlpha);
GLAPI void APIENTRY glAttachShader (GLuint program, GLuint shader);
GLAPI void APIENTRY glCompileShader (GLuint shader);
GLAPI GLuint APIENTRY glCreateProgram (void);
GLAPI GLuint APIENTRY glCreateShader (GLenum type);
GLAPI void APIENTRY glDeleteProgram (GLuint program);
GLAPI void APIENTRY glDeleteShader (GLuint shader);
GLAPI void APIENTRY glDetachShader (GLuint program, GLuint shader);
GLAPI void APIENTRY glEnableVertexAttribArray (GLuint index);
GLAPI GLint APIENTRY glGetAttribLocation (GLuint program, const GLchar *name);
GLAPI void APIENTRY glGetProgramiv (GLuint program, GLenum pname, GLint *params);
GLAPI void APIENTRY glGetProgramInfoLog (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
GLAPI void APIENTRY glGetShaderiv (GLuint shader, GLenum pname, GLint *params);
GLAPI void APIENTRY glGetShaderInfoLog (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
GLAPI GLint APIENTRY glGetUniformLocation (GLuint program, const GLchar *name);
GLAPI void APIENTRY glLinkProgram (GLuint program);
GLAPI void APIENTRY glShaderSource (GLuint shader, GLsizei count, const GLchar *const*string, const GLint *length);
GLAPI void APIENTRY glUseProgram (GLuint program);
GLAPI void APIENTRY glUniform1i (GLint location, GLint v0);
GLAPI void APIENTRY glUniformMatrix4fv (GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
GLAPI void APIENTRY glVertexAttribPointer (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const void *pointer);
#endif
#endif /* GL_VERSION_2_0 */
#ifndef GL_VERSION_3_0
typedef khronos_uint16_t GLhalf;
#define GL_MAJOR_VERSION 0x821B
#define GL_MINOR_VERSION 0x821C
#define GL_NUM_EXTENSIONS 0x821D
#define GL_FRAMEBUFFER_SRGB 0x8DB9
#define GL_VERTEX_ARRAY_BINDING 0x85B5
typedef void (APIENTRYP PFNGLGETBOOLEANI_VPROC) (GLenum target, GLuint index, GLboolean *data);
typedef void (APIENTRYP PFNGLGETINTEGERI_VPROC) (GLenum target, GLuint index, GLint *data);
typedef const GLubyte *(APIENTRYP PFNGLGETSTRINGIPROC) (GLenum name, GLuint index);
typedef void (APIENTRYP PFNGLBINDVERTEXARRAYPROC) (GLuint array);
typedef void (APIENTRYP PFNGLDELETEVERTEXARRAYSPROC) (GLsizei n, const GLuint *arrays);
typedef void (APIENTRYP PFNGLGENVERTEXARRAYSPROC) (GLsizei n, GLuint *arrays);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI const GLubyte *APIENTRY glGetStringi (GLenum name, GLuint index);
GLAPI void APIENTRY glBindVertexArray (GLuint array);
GLAPI void APIENTRY glDeleteVertexArrays (GLsizei n, const GLuint *arrays);
GLAPI void APIENTRY glGenVertexArrays (GLsizei n, GLuint *arrays);
#endif
#endif /* GL_VERSION_3_0 */
#ifndef GL_VERSION_3_1
#define GL_VERSION_3_1 1
#define GL_PRIMITIVE_RESTART 0x8F9D
#endif /* GL_VERSION_3_1 */
#ifndef GL_VERSION_3_2
#define GL_VERSION_3_2 1
typedef struct __GLsync *GLsync;
typedef khronos_uint64_t GLuint64;
typedef khronos_int64_t GLint64;
typedef void (APIENTRYP PFNGLDRAWELEMENTSBASEVERTEXPROC) (GLenum mode, GLsizei count, GLenum type, const void *indices, GLint basevertex);
typedef void (APIENTRYP PFNGLGETINTEGER64I_VPROC) (GLenum target, GLuint index, GLint64 *data);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glDrawElementsBaseVertex (GLenum mode, GLsizei count, GLenum type, const void *indices, GLint basevertex);
#endif
#endif /* GL_VERSION_3_2 */
#ifndef GL_VERSION_3_3
#define GL_VERSION_3_3 1
#define GL_SAMPLER_BINDING 0x8919
typedef void (APIENTRYP PFNGLBINDSAMPLERPROC) (GLuint unit, GLuint sampler);
#ifdef GL_GLEXT_PROTOTYPES
GLAPI void APIENTRY glBindSampler (GLuint unit, GLuint sampler);
#endif
#endif /* GL_VERSION_3_3 */
#ifndef GL_VERSION_4_1
typedef void (APIENTRYP PFNGLGETFLOATI_VPROC) (GLenum target, GLuint index, GLfloat *data);
typedef void (APIENTRYP PFNGLGETDOUBLEI_VPROC) (GLenum target, GLuint index, GLdouble *data);
#endif /* GL_VERSION_4_1 */
#ifndef GL_VERSION_4_3
typedef void (APIENTRY *GLDEBUGPROC)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,const void *userParam);
#endif /* GL_VERSION_4_3 */
#ifndef GL_VERSION_4_5
#define GL_CLIP_ORIGIN 0x935C
typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKI_VPROC) (GLuint xfb, GLenum pname, GLuint index, GLint *param);
typedef void (APIENTRYP PFNGLGETTRANSFORMFEEDBACKI64_VPROC) (GLuint xfb, GLenum pname, GLuint index, GLint64 *param);
#endif /* GL_VERSION_4_5 */
#ifndef GL_ARB_bindless_texture
typedef khronos_uint64_t GLuint64EXT;
#endif /* GL_ARB_bindless_texture */
#ifndef GL_ARB_cl_event
struct _cl_context;
struct _cl_event;
#endif /* GL_ARB_cl_event */
#ifndef GL_ARB_clip_control
#define GL_ARB_clip_control 1
#endif /* GL_ARB_clip_control */
#ifndef GL_ARB_debug_output
typedef void (APIENTRY *GLDEBUGPROCARB)(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,const void *userParam);
#endif /* GL_ARB_debug_output */
#ifndef GL_EXT_EGL_image_storage
typedef void *GLeglImageOES;
#endif /* GL_EXT_EGL_image_storage */
#ifndef GL_EXT_direct_state_access
typedef void (APIENTRYP PFNGLGETFLOATI_VEXTPROC) (GLenum pname, GLuint index, GLfloat *params);
typedef void (APIENTRYP PFNGLGETDOUBLEI_VEXTPROC) (GLenum pname, GLuint index, GLdouble *params);
typedef void (APIENTRYP PFNGLGETPOINTERI_VEXTPROC) (GLenum pname, GLuint index, void **params);
typedef void (APIENTRYP PFNGLGETVERTEXARRAYINTEGERI_VEXTPROC) (GLuint vaobj, GLuint index, GLenum pname, GLint *param);
typedef void (APIENTRYP PFNGLGETVERTEXARRAYPOINTERI_VEXTPROC) (GLuint vaobj, GLuint index, GLenum pname, void **param);
#endif /* GL_EXT_direct_state_access */
#ifndef GL_NV_draw_vulkan_image
typedef void (APIENTRY *GLVULKANPROCNV)(void);
#endif /* GL_NV_draw_vulkan_image */
#ifndef GL_NV_gpu_shader5
typedef khronos_int64_t GLint64EXT;
#endif /* GL_NV_gpu_shader5 */
#ifndef GL_NV_vertex_buffer_unified_memory
typedef void (APIENTRYP PFNGLGETINTEGERUI64I_VNVPROC) (GLenum value, GLuint index, GLuint64EXT *result);
#endif /* GL_NV_vertex_buffer_unified_memory */
#ifdef __cplusplus
}
#endif
#endif
#ifndef GL3W_API
#define GL3W_API
#endif
#ifndef __gl_h_
#define __gl_h_
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define GL3W_OK 0
#define GL3W_ERROR_INIT -1
#define GL3W_ERROR_LIBRARY_OPEN -2
#define GL3W_ERROR_OPENGL_VERSION -3
typedef void (*GL3WglProc)(void);
typedef GL3WglProc (*GL3WGetProcAddressProc)(const char *proc);
/* gl3w api */
GL3W_API int imgl3wInit(void);
GL3W_API int imgl3wInit2(GL3WGetProcAddressProc proc);
GL3W_API int imgl3wIsSupported(int major, int minor);
GL3W_API GL3WglProc imgl3wGetProcAddress(const char *proc);
/* gl3w internal state */
union GL3WProcs {
GL3WglProc ptr[52];
struct {
PFNGLACTIVETEXTUREPROC ActiveTexture;
PFNGLATTACHSHADERPROC AttachShader;
PFNGLBINDBUFFERPROC BindBuffer;
PFNGLBINDSAMPLERPROC BindSampler;
PFNGLBINDTEXTUREPROC BindTexture;
PFNGLBINDVERTEXARRAYPROC BindVertexArray;
PFNGLBLENDEQUATIONPROC BlendEquation;
PFNGLBLENDEQUATIONSEPARATEPROC BlendEquationSeparate;
PFNGLBLENDFUNCSEPARATEPROC BlendFuncSeparate;
PFNGLBUFFERDATAPROC BufferData;
PFNGLCLEARPROC Clear;
PFNGLCLEARCOLORPROC ClearColor;
PFNGLCOMPILESHADERPROC CompileShader;
PFNGLCREATEPROGRAMPROC CreateProgram;
PFNGLCREATESHADERPROC CreateShader;
PFNGLDELETEBUFFERSPROC DeleteBuffers;
PFNGLDELETEPROGRAMPROC DeleteProgram;
PFNGLDELETESHADERPROC DeleteShader;
PFNGLDELETETEXTURESPROC DeleteTextures;
PFNGLDELETEVERTEXARRAYSPROC DeleteVertexArrays;
PFNGLDETACHSHADERPROC DetachShader;
PFNGLDISABLEPROC Disable;
PFNGLDRAWELEMENTSPROC DrawElements;
PFNGLDRAWELEMENTSBASEVERTEXPROC DrawElementsBaseVertex;
PFNGLENABLEPROC Enable;
PFNGLENABLEVERTEXATTRIBARRAYPROC EnableVertexAttribArray;
PFNGLGENBUFFERSPROC GenBuffers;
PFNGLGENTEXTURESPROC GenTextures;
PFNGLGENVERTEXARRAYSPROC GenVertexArrays;
PFNGLGETATTRIBLOCATIONPROC GetAttribLocation;
PFNGLGETINTEGERVPROC GetIntegerv;
PFNGLGETPROGRAMINFOLOGPROC GetProgramInfoLog;
PFNGLGETPROGRAMIVPROC GetProgramiv;
PFNGLGETSHADERINFOLOGPROC GetShaderInfoLog;
PFNGLGETSHADERIVPROC GetShaderiv;
PFNGLGETSTRINGPROC GetString;
PFNGLGETSTRINGIPROC GetStringi;
PFNGLGETUNIFORMLOCATIONPROC GetUniformLocation;
PFNGLISENABLEDPROC IsEnabled;
PFNGLLINKPROGRAMPROC LinkProgram;
PFNGLPIXELSTOREIPROC PixelStorei;
PFNGLPOLYGONMODEPROC PolygonMode;
PFNGLREADPIXELSPROC ReadPixels;
PFNGLSCISSORPROC Scissor;
PFNGLSHADERSOURCEPROC ShaderSource;
PFNGLTEXIMAGE2DPROC TexImage2D;
PFNGLTEXPARAMETERIPROC TexParameteri;
PFNGLUNIFORM1IPROC Uniform1i;
PFNGLUNIFORMMATRIX4FVPROC UniformMatrix4fv;
PFNGLUSEPROGRAMPROC UseProgram;
PFNGLVERTEXATTRIBPOINTERPROC VertexAttribPointer;
PFNGLVIEWPORTPROC Viewport;
} gl;
};
GL3W_API extern union GL3WProcs gl3wProcs;
/* OpenGL functions */
#define glActiveTexture gl3wProcs.gl.ActiveTexture
#define glAttachShader gl3wProcs.gl.AttachShader
#define glBindBuffer gl3wProcs.gl.BindBuffer
#define glBindSampler gl3wProcs.gl.BindSampler
#define glBindTexture gl3wProcs.gl.BindTexture
#define glBindVertexArray gl3wProcs.gl.BindVertexArray
#define glBlendEquation gl3wProcs.gl.BlendEquation
#define glBlendEquationSeparate gl3wProcs.gl.BlendEquationSeparate
#define glBlendFuncSeparate gl3wProcs.gl.BlendFuncSeparate
#define glBufferData gl3wProcs.gl.BufferData
#define glClear gl3wProcs.gl.Clear
#define glClearColor gl3wProcs.gl.ClearColor
#define glCompileShader gl3wProcs.gl.CompileShader
#define glCreateProgram gl3wProcs.gl.CreateProgram
#define glCreateShader gl3wProcs.gl.CreateShader
#define glDeleteBuffers gl3wProcs.gl.DeleteBuffers
#define glDeleteProgram gl3wProcs.gl.DeleteProgram
#define glDeleteShader gl3wProcs.gl.DeleteShader
#define glDeleteTextures gl3wProcs.gl.DeleteTextures
#define glDeleteVertexArrays gl3wProcs.gl.DeleteVertexArrays
#define glDetachShader gl3wProcs.gl.DetachShader
#define glDisable gl3wProcs.gl.Disable
#define glDrawElements gl3wProcs.gl.DrawElements
#define glDrawElementsBaseVertex gl3wProcs.gl.DrawElementsBaseVertex
#define glEnable gl3wProcs.gl.Enable
#define glEnableVertexAttribArray gl3wProcs.gl.EnableVertexAttribArray
#define glGenBuffers gl3wProcs.gl.GenBuffers
#define glGenTextures gl3wProcs.gl.GenTextures
#define glGenVertexArrays gl3wProcs.gl.GenVertexArrays
#define glGetAttribLocation gl3wProcs.gl.GetAttribLocation
#define glGetIntegerv gl3wProcs.gl.GetIntegerv
#define glGetProgramInfoLog gl3wProcs.gl.GetProgramInfoLog
#define glGetProgramiv gl3wProcs.gl.GetProgramiv
#define glGetShaderInfoLog gl3wProcs.gl.GetShaderInfoLog
#define glGetShaderiv gl3wProcs.gl.GetShaderiv
#define glGetString gl3wProcs.gl.GetString
#define glGetStringi gl3wProcs.gl.GetStringi
#define glGetUniformLocation gl3wProcs.gl.GetUniformLocation
#define glIsEnabled gl3wProcs.gl.IsEnabled
#define glLinkProgram gl3wProcs.gl.LinkProgram
#define glPixelStorei gl3wProcs.gl.PixelStorei
#define glPolygonMode gl3wProcs.gl.PolygonMode
#define glReadPixels gl3wProcs.gl.ReadPixels
#define glScissor gl3wProcs.gl.Scissor
#define glShaderSource gl3wProcs.gl.ShaderSource
#define glTexImage2D gl3wProcs.gl.TexImage2D
#define glTexParameteri gl3wProcs.gl.TexParameteri
#define glUniform1i gl3wProcs.gl.Uniform1i
#define glUniformMatrix4fv gl3wProcs.gl.UniformMatrix4fv
#define glUseProgram gl3wProcs.gl.UseProgram
#define glVertexAttribPointer gl3wProcs.gl.VertexAttribPointer
#define glViewport gl3wProcs.gl.Viewport
#ifdef __cplusplus
}
#endif
#endif
#ifdef IMGL3W_IMPL
#ifdef __cplusplus
extern "C" {
#endif
#include <stdlib.h>
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#if defined(_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
static HMODULE libgl;
typedef PROC(__stdcall* GL3WglGetProcAddr)(LPCSTR);
static GL3WglGetProcAddr wgl_get_proc_address;
static int open_libgl(void)
{
libgl = LoadLibraryA("opengl32.dll");
if (!libgl)
return GL3W_ERROR_LIBRARY_OPEN;
wgl_get_proc_address = (GL3WglGetProcAddr)GetProcAddress(libgl, "wglGetProcAddress");
return GL3W_OK;
}
static void close_libgl(void) { FreeLibrary(libgl); }
static GL3WglProc get_proc(const char *proc)
{
GL3WglProc res;
res = (GL3WglProc)wgl_get_proc_address(proc);
if (!res)
res = (GL3WglProc)GetProcAddress(libgl, proc);
return res;
}
#elif defined(__APPLE__)
#include <dlfcn.h>
static void *libgl;
static int open_libgl(void)
{
libgl = dlopen("/System/Library/Frameworks/OpenGL.framework/OpenGL", RTLD_LAZY | RTLD_LOCAL);
if (!libgl)
return GL3W_ERROR_LIBRARY_OPEN;
return GL3W_OK;
}
static void close_libgl(void) { dlclose(libgl); }
static GL3WglProc get_proc(const char *proc)
{
GL3WglProc res;
*(void **)(&res) = dlsym(libgl, proc);
return res;
}
#else
#include <dlfcn.h>
static void *libgl;
static GL3WglProc (*glx_get_proc_address)(const GLubyte *);
static int open_libgl(void)
{
libgl = dlopen("libGL.so.1", RTLD_LAZY | RTLD_LOCAL);
if (!libgl)
return GL3W_ERROR_LIBRARY_OPEN;
*(void **)(&glx_get_proc_address) = dlsym(libgl, "glXGetProcAddressARB");
return GL3W_OK;
}
static void close_libgl(void) { dlclose(libgl); }
static GL3WglProc get_proc(const char *proc)
{
GL3WglProc res;
res = glx_get_proc_address((const GLubyte *)proc);
if (!res)
*(void **)(&res) = dlsym(libgl, proc);
return res;
}
#endif
static struct { int major, minor; } version;
static int parse_version(void)
{
if (!glGetIntegerv)
return GL3W_ERROR_INIT;
glGetIntegerv(GL_MAJOR_VERSION, &version.major);
glGetIntegerv(GL_MINOR_VERSION, &version.minor);
if (version.major < 3)
return GL3W_ERROR_OPENGL_VERSION;
return GL3W_OK;
}
static void load_procs(GL3WGetProcAddressProc proc);
int imgl3wInit(void)
{
int res = open_libgl();
if (res)
return res;
atexit(close_libgl);
return imgl3wInit2(get_proc);
}
int imgl3wInit2(GL3WGetProcAddressProc proc)
{
load_procs(proc);
return parse_version();
}
int imgl3wIsSupported(int major, int minor)
{
if (major < 3)
return 0;
if (version.major == major)
return version.minor >= minor;
return version.major >= major;
}
GL3WglProc imgl3wGetProcAddress(const char *proc) { return get_proc(proc); }
static const char *proc_names[] = {
"glActiveTexture",
"glAttachShader",
"glBindBuffer",
"glBindSampler",
"glBindTexture",
"glBindVertexArray",
"glBlendEquation",
"glBlendEquationSeparate",
"glBlendFuncSeparate",
"glBufferData",
"glClear",
"glClearColor",
"glCompileShader",
"glCreateProgram",
"glCreateShader",
"glDeleteBuffers",
"glDeleteProgram",
"glDeleteShader",
"glDeleteTextures",
"glDeleteVertexArrays",
"glDetachShader",
"glDisable",
"glDrawElements",
"glDrawElementsBaseVertex",
"glEnable",
"glEnableVertexAttribArray",
"glGenBuffers",
"glGenTextures",
"glGenVertexArrays",
"glGetAttribLocation",
"glGetIntegerv",
"glGetProgramInfoLog",
"glGetProgramiv",
"glGetShaderInfoLog",
"glGetShaderiv",
"glGetString",
"glGetStringi",
"glGetUniformLocation",
"glIsEnabled",
"glLinkProgram",
"glPixelStorei",
"glPolygonMode",
"glReadPixels",
"glScissor",
"glShaderSource",
"glTexImage2D",
"glTexParameteri",
"glUniform1i",
"glUniformMatrix4fv",
"glUseProgram",
"glVertexAttribPointer",
"glViewport",
};
GL3W_API union GL3WProcs gl3wProcs;
static void load_procs(GL3WGetProcAddressProc proc)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(proc_names); i++)
gl3wProcs.ptr[i] = proc(proc_names[i]);
}
#ifdef __cplusplus
}
#endif
#endif

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// dear imgui: Platform Backend for SDL2
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
// (Info: SDL2 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)
// (Prefer SDL 2.0.5+ for full feature support.)
// Implemented features:
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// [X] Platform: Clipboard support.
// [X] Platform: Keyboard arrays indexed using SDL_SCANCODE_* codes, e.g. ImGui::IsKeyPressed(SDL_SCANCODE_SPACE).
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// Missing features:
// [ ] Platform: SDL2 handling of IME under Windows appears to be broken and it explicitly disable the regular Windows IME. You can restore Windows IME by compiling SDL with SDL_DISABLE_WINDOWS_IME.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2021-08-17: Calling io.AddFocusEvent() on SDL_WINDOWEVENT_FOCUS_GAINED/SDL_WINDOWEVENT_FOCUS_LOST.
// 2021-07-29: Inputs: MousePos is correctly reported when the host platform window is hovered but not focused (using SDL_GetMouseFocus() + SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, requires SDL 2.0.5+)
// 2021-06-29: *BREAKING CHANGE* Removed 'SDL_Window* window' parameter to ImGui_ImplSDL2_NewFrame() which was unnecessary.
// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
// 2021-03-22: Rework global mouse pos availability check listing supported platforms explicitly, effectively fixing mouse access on Raspberry Pi. (#2837, #3950)
// 2020-05-25: Misc: Report a zero display-size when window is minimized, to be consistent with other backends.
// 2020-02-20: Inputs: Fixed mapping for ImGuiKey_KeyPadEnter (using SDL_SCANCODE_KP_ENTER instead of SDL_SCANCODE_RETURN2).
// 2019-12-17: Inputs: On Wayland, use SDL_GetMouseState (because there is no global mouse state).
// 2019-12-05: Inputs: Added support for ImGuiMouseCursor_NotAllowed mouse cursor.
// 2019-07-21: Inputs: Added mapping for ImGuiKey_KeyPadEnter.
// 2019-04-23: Inputs: Added support for SDL_GameController (if ImGuiConfigFlags_NavEnableGamepad is set by user application).
// 2019-03-12: Misc: Preserve DisplayFramebufferScale when main window is minimized.
// 2018-12-21: Inputs: Workaround for Android/iOS which don't seem to handle focus related calls.
// 2018-11-30: Misc: Setting up io.BackendPlatformName so it can be displayed in the About Window.
// 2018-11-14: Changed the signature of ImGui_ImplSDL2_ProcessEvent() to take a 'const SDL_Event*'.
// 2018-08-01: Inputs: Workaround for Emscripten which doesn't seem to handle focus related calls.
// 2018-06-29: Inputs: Added support for the ImGuiMouseCursor_Hand cursor.
// 2018-06-08: Misc: Extracted imgui_impl_sdl.cpp/.h away from the old combined SDL2+OpenGL/Vulkan examples.
// 2018-06-08: Misc: ImGui_ImplSDL2_InitForOpenGL() now takes a SDL_GLContext parameter.
// 2018-05-09: Misc: Fixed clipboard paste memory leak (we didn't call SDL_FreeMemory on the data returned by SDL_GetClipboardText).
// 2018-03-20: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors flag + honor ImGuiConfigFlags_NoMouseCursorChange flag.
// 2018-02-16: Inputs: Added support for mouse cursors, honoring ImGui::GetMouseCursor() value.
// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
// 2018-02-06: Inputs: Added mapping for ImGuiKey_Space.
// 2018-02-05: Misc: Using SDL_GetPerformanceCounter() instead of SDL_GetTicks() to be able to handle very high framerate (1000+ FPS).
// 2018-02-05: Inputs: Keyboard mapping is using scancodes everywhere instead of a confusing mixture of keycodes and scancodes.
// 2018-01-20: Inputs: Added Horizontal Mouse Wheel support.
// 2018-01-19: Inputs: When available (SDL 2.0.4+) using SDL_CaptureMouse() to retrieve coordinates outside of client area when dragging. Otherwise (SDL 2.0.3 and before) testing for SDL_WINDOW_INPUT_FOCUS instead of SDL_WINDOW_MOUSE_FOCUS.
// 2018-01-18: Inputs: Added mapping for ImGuiKey_Insert.
// 2017-08-25: Inputs: MousePos set to -FLT_MAX,-FLT_MAX when mouse is unavailable/missing (instead of -1,-1).
// 2016-10-15: Misc: Added a void* user_data parameter to Clipboard function handlers.
#include "imgui.h"
#include "imgui_impl_sdl.h"
// SDL
#include <SDL.h>
#include <SDL_syswm.h>
#if defined(__APPLE__)
#include "TargetConditionals.h"
#endif
#if SDL_VERSION_ATLEAST(2,0,4) && !defined(__EMSCRIPTEN__) && !defined(__ANDROID__) && !(defined(__APPLE__) && TARGET_OS_IOS)
#define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 1
#else
#define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 0
#endif
#define SDL_HAS_MOUSE_FOCUS_CLICKTHROUGH SDL_VERSION_ATLEAST(2,0,5)
#define SDL_HAS_VULKAN SDL_VERSION_ATLEAST(2,0,6)
// SDL Data
struct ImGui_ImplSDL2_Data
{
SDL_Window* Window;
Uint64 Time;
bool MousePressed[3];
SDL_Cursor* MouseCursors[ImGuiMouseCursor_COUNT];
char* ClipboardTextData;
bool MouseCanUseGlobalState;
ImGui_ImplSDL2_Data() { memset(this, 0, sizeof(*this)); }
};
// Backend data stored in io.BackendPlatformUserData to allow support for multiple Dear ImGui contexts
// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts.
// FIXME: multi-context support is not well tested and probably dysfunctional in this backend.
// FIXME: some shared resources (mouse cursor shape, gamepad) are mishandled when using multi-context.
static ImGui_ImplSDL2_Data* ImGui_ImplSDL2_GetBackendData()
{
return ImGui::GetCurrentContext() ? (ImGui_ImplSDL2_Data*)ImGui::GetIO().BackendPlatformUserData : NULL;
}
// Functions
static const char* ImGui_ImplSDL2_GetClipboardText(void*)
{
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
if (bd->ClipboardTextData)
SDL_free(bd->ClipboardTextData);
bd->ClipboardTextData = SDL_GetClipboardText();
return bd->ClipboardTextData;
}
static void ImGui_ImplSDL2_SetClipboardText(void*, const char* text)
{
SDL_SetClipboardText(text);
}
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
// If you have multiple SDL events and some of them are not meant to be used by dear imgui, you may need to filter events based on their windowID field.
bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
{
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
switch (event->type)
{
case SDL_MOUSEWHEEL:
{
if (event->wheel.x > 0) io.MouseWheelH += 1;
if (event->wheel.x < 0) io.MouseWheelH -= 1;
if (event->wheel.y > 0) io.MouseWheel += 1;
if (event->wheel.y < 0) io.MouseWheel -= 1;
return true;
}
case SDL_MOUSEBUTTONDOWN:
{
if (event->button.button == SDL_BUTTON_LEFT) { bd->MousePressed[0] = true; }
if (event->button.button == SDL_BUTTON_RIGHT) { bd->MousePressed[1] = true; }
if (event->button.button == SDL_BUTTON_MIDDLE) { bd->MousePressed[2] = true; }
return true;
}
case SDL_TEXTINPUT:
{
io.AddInputCharactersUTF8(event->text.text);
return true;
}
case SDL_KEYDOWN:
case SDL_KEYUP:
{
int key = event->key.keysym.scancode;
IM_ASSERT(key >= 0 && key < IM_ARRAYSIZE(io.KeysDown));
io.KeysDown[key] = (event->type == SDL_KEYDOWN);
io.KeyShift = ((SDL_GetModState() & KMOD_SHIFT) != 0);
io.KeyCtrl = ((SDL_GetModState() & KMOD_CTRL) != 0);
io.KeyAlt = ((SDL_GetModState() & KMOD_ALT) != 0);
#ifdef _WIN32
io.KeySuper = false;
#else
io.KeySuper = ((SDL_GetModState() & KMOD_GUI) != 0);
#endif
return true;
}
case SDL_WINDOWEVENT:
{
if (event->window.event == SDL_WINDOWEVENT_FOCUS_GAINED)
io.AddFocusEvent(true);
else if (event->window.event == SDL_WINDOWEVENT_FOCUS_LOST)
io.AddFocusEvent(false);
return true;
}
}
return false;
}
static bool ImGui_ImplSDL2_Init(SDL_Window* window)
{
ImGuiIO& io = ImGui::GetIO();
IM_ASSERT(io.BackendPlatformUserData == NULL && "Already initialized a platform backend!");
// Check and store if we are on a SDL backend that supports global mouse position
// ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
bool mouse_can_use_global_state = false;
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
const char* sdl_backend = SDL_GetCurrentVideoDriver();
const char* global_mouse_whitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
for (int n = 0; n < IM_ARRAYSIZE(global_mouse_whitelist); n++)
if (strncmp(sdl_backend, global_mouse_whitelist[n], strlen(global_mouse_whitelist[n])) == 0)
mouse_can_use_global_state = true;
#endif
// Setup backend capabilities flags
ImGui_ImplSDL2_Data* bd = IM_NEW(ImGui_ImplSDL2_Data)();
io.BackendPlatformUserData = (void*)bd;
io.BackendPlatformName = "imgui_impl_sdl";
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
bd->Window = window;
bd->MouseCanUseGlobalState = mouse_can_use_global_state;
// Keyboard mapping. Dear ImGui will use those indices to peek into the io.KeysDown[] array.
io.KeyMap[ImGuiKey_Tab] = SDL_SCANCODE_TAB;
io.KeyMap[ImGuiKey_LeftArrow] = SDL_SCANCODE_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = SDL_SCANCODE_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = SDL_SCANCODE_UP;
io.KeyMap[ImGuiKey_DownArrow] = SDL_SCANCODE_DOWN;
io.KeyMap[ImGuiKey_PageUp] = SDL_SCANCODE_PAGEUP;
io.KeyMap[ImGuiKey_PageDown] = SDL_SCANCODE_PAGEDOWN;
io.KeyMap[ImGuiKey_Home] = SDL_SCANCODE_HOME;
io.KeyMap[ImGuiKey_End] = SDL_SCANCODE_END;
io.KeyMap[ImGuiKey_Insert] = SDL_SCANCODE_INSERT;
io.KeyMap[ImGuiKey_Delete] = SDL_SCANCODE_DELETE;
io.KeyMap[ImGuiKey_Backspace] = SDL_SCANCODE_BACKSPACE;
io.KeyMap[ImGuiKey_Space] = SDL_SCANCODE_SPACE;
io.KeyMap[ImGuiKey_Enter] = SDL_SCANCODE_RETURN;
io.KeyMap[ImGuiKey_Escape] = SDL_SCANCODE_ESCAPE;
io.KeyMap[ImGuiKey_KeyPadEnter] = SDL_SCANCODE_KP_ENTER;
io.KeyMap[ImGuiKey_A] = SDL_SCANCODE_A;
io.KeyMap[ImGuiKey_C] = SDL_SCANCODE_C;
io.KeyMap[ImGuiKey_V] = SDL_SCANCODE_V;
io.KeyMap[ImGuiKey_X] = SDL_SCANCODE_X;
io.KeyMap[ImGuiKey_Y] = SDL_SCANCODE_Y;
io.KeyMap[ImGuiKey_Z] = SDL_SCANCODE_Z;
io.SetClipboardTextFn = ImGui_ImplSDL2_SetClipboardText;
io.GetClipboardTextFn = ImGui_ImplSDL2_GetClipboardText;
io.ClipboardUserData = NULL;
// Load mouse cursors
bd->MouseCursors[ImGuiMouseCursor_Arrow] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
bd->MouseCursors[ImGuiMouseCursor_TextInput] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_IBEAM);
bd->MouseCursors[ImGuiMouseCursor_ResizeAll] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEALL);
bd->MouseCursors[ImGuiMouseCursor_ResizeNS] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENS);
bd->MouseCursors[ImGuiMouseCursor_ResizeEW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEWE);
bd->MouseCursors[ImGuiMouseCursor_ResizeNESW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENESW);
bd->MouseCursors[ImGuiMouseCursor_ResizeNWSE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENWSE);
bd->MouseCursors[ImGuiMouseCursor_Hand] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_HAND);
bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NO);
#ifdef _WIN32
SDL_SysWMinfo info;
SDL_VERSION(&info.version);
if (SDL_GetWindowWMInfo(window, &info))
io.ImeWindowHandle = info.info.win.window;
#else
(void)window;
#endif
// Set SDL hint to receive mouse click events on window focus, otherwise SDL doesn't emit the event.
// Without this, when clicking to gain focus, our widgets wouldn't activate even though they showed as hovered.
// (This is unfortunately a global SDL setting, so enabling it might have a side-effect on your application.
// It is unlikely to make a difference, but if your app absolutely needs to ignore the initial on-focus click:
// you can ignore SDL_MOUSEBUTTONDOWN events coming right after a SDL_WINDOWEVENT_FOCUS_GAINED)
#if SDL_HAS_MOUSE_FOCUS_CLICKTHROUGH
SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1");
#endif
return true;
}
bool ImGui_ImplSDL2_InitForOpenGL(SDL_Window* window, void* sdl_gl_context)
{
IM_UNUSED(sdl_gl_context); // Viewport branch will need this.
return ImGui_ImplSDL2_Init(window);
}
bool ImGui_ImplSDL2_InitForVulkan(SDL_Window* window)
{
#if !SDL_HAS_VULKAN
IM_ASSERT(0 && "Unsupported");
#endif
return ImGui_ImplSDL2_Init(window);
}
bool ImGui_ImplSDL2_InitForD3D(SDL_Window* window)
{
#if !defined(_WIN32)
IM_ASSERT(0 && "Unsupported");
#endif
return ImGui_ImplSDL2_Init(window);
}
bool ImGui_ImplSDL2_InitForMetal(SDL_Window* window)
{
return ImGui_ImplSDL2_Init(window);
}
void ImGui_ImplSDL2_Shutdown()
{
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
if (bd->ClipboardTextData)
SDL_free(bd->ClipboardTextData);
for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_COUNT; cursor_n++)
SDL_FreeCursor(bd->MouseCursors[cursor_n]);
io.BackendPlatformName = NULL;
io.BackendPlatformUserData = NULL;
IM_DELETE(bd);
}
static void ImGui_ImplSDL2_UpdateMousePosAndButtons()
{
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
ImGuiIO& io = ImGui::GetIO();
ImVec2 mouse_pos_prev = io.MousePos;
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
// Update mouse buttons
int mouse_x_local, mouse_y_local;
Uint32 mouse_buttons = SDL_GetMouseState(&mouse_x_local, &mouse_y_local);
io.MouseDown[0] = bd->MousePressed[0] || (mouse_buttons & SDL_BUTTON(SDL_BUTTON_LEFT)) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
io.MouseDown[1] = bd->MousePressed[1] || (mouse_buttons & SDL_BUTTON(SDL_BUTTON_RIGHT)) != 0;
io.MouseDown[2] = bd->MousePressed[2] || (mouse_buttons & SDL_BUTTON(SDL_BUTTON_MIDDLE)) != 0;
bd->MousePressed[0] = bd->MousePressed[1] = bd->MousePressed[2] = false;
// Obtain focused and hovered window. We forward mouse input when focused or when hovered (and no other window is capturing)
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
SDL_Window* focused_window = SDL_GetKeyboardFocus();
SDL_Window* hovered_window = SDL_HAS_MOUSE_FOCUS_CLICKTHROUGH ? SDL_GetMouseFocus() : NULL; // This is better but is only reliably useful with SDL 2.0.5+ and SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH.
SDL_Window* mouse_window = NULL;
if (hovered_window && bd->Window == hovered_window)
mouse_window = hovered_window;
else if (focused_window && bd->Window == focused_window)
mouse_window = focused_window;
// SDL_CaptureMouse() let the OS know e.g. that our imgui drag outside the SDL window boundaries shouldn't e.g. trigger other operations outside
SDL_CaptureMouse(ImGui::IsAnyMouseDown() ? SDL_TRUE : SDL_FALSE);
#else
// SDL 2.0.3 and non-windowed systems: single-viewport only
SDL_Window* mouse_window = (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_INPUT_FOCUS) ? bd->Window : NULL;
#endif
if (mouse_window == NULL)
return;
// Set OS mouse position from Dear ImGui if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
if (io.WantSetMousePos)
SDL_WarpMouseInWindow(bd->Window, (int)mouse_pos_prev.x, (int)mouse_pos_prev.y);
// Set Dear ImGui mouse position from OS position + get buttons. (this is the common behavior)
if (bd->MouseCanUseGlobalState)
{
// Single-viewport mode: mouse position in client window coordinates (io.MousePos is (0,0) when the mouse is on the upper-left corner of the app window)
// Unlike local position obtained earlier this will be valid when straying out of bounds.
int mouse_x_global, mouse_y_global;
SDL_GetGlobalMouseState(&mouse_x_global, &mouse_y_global);
int window_x, window_y;
SDL_GetWindowPosition(mouse_window, &window_x, &window_y);
io.MousePos = ImVec2((float)(mouse_x_global - window_x), (float)(mouse_y_global - window_y));
}
else
{
io.MousePos = ImVec2((float)mouse_x_local, (float)mouse_y_local);
}
}
static void ImGui_ImplSDL2_UpdateMouseCursor()
{
ImGuiIO& io = ImGui::GetIO();
if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
return;
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
if (io.MouseDrawCursor || imgui_cursor == ImGuiMouseCursor_None)
{
// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
SDL_ShowCursor(SDL_FALSE);
}
else
{
// Show OS mouse cursor
SDL_SetCursor(bd->MouseCursors[imgui_cursor] ? bd->MouseCursors[imgui_cursor] : bd->MouseCursors[ImGuiMouseCursor_Arrow]);
SDL_ShowCursor(SDL_TRUE);
}
}
static void ImGui_ImplSDL2_UpdateGamepads()
{
ImGuiIO& io = ImGui::GetIO();
memset(io.NavInputs, 0, sizeof(io.NavInputs));
if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
return;
// Get gamepad
SDL_GameController* game_controller = SDL_GameControllerOpen(0);
if (!game_controller)
{
io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
return;
}
// Update gamepad inputs
#define MAP_BUTTON(NAV_NO, BUTTON_NO) { io.NavInputs[NAV_NO] = (SDL_GameControllerGetButton(game_controller, BUTTON_NO) != 0) ? 1.0f : 0.0f; }
#define MAP_ANALOG(NAV_NO, AXIS_NO, V0, V1) { float vn = (float)(SDL_GameControllerGetAxis(game_controller, AXIS_NO) - V0) / (float)(V1 - V0); if (vn > 1.0f) vn = 1.0f; if (vn > 0.0f && io.NavInputs[NAV_NO] < vn) io.NavInputs[NAV_NO] = vn; }
const int thumb_dead_zone = 8000; // SDL_gamecontroller.h suggests using this value.
MAP_BUTTON(ImGuiNavInput_Activate, SDL_CONTROLLER_BUTTON_A); // Cross / A
MAP_BUTTON(ImGuiNavInput_Cancel, SDL_CONTROLLER_BUTTON_B); // Circle / B
MAP_BUTTON(ImGuiNavInput_Menu, SDL_CONTROLLER_BUTTON_X); // Square / X
MAP_BUTTON(ImGuiNavInput_Input, SDL_CONTROLLER_BUTTON_Y); // Triangle / Y
MAP_BUTTON(ImGuiNavInput_DpadLeft, SDL_CONTROLLER_BUTTON_DPAD_LEFT); // D-Pad Left
MAP_BUTTON(ImGuiNavInput_DpadRight, SDL_CONTROLLER_BUTTON_DPAD_RIGHT); // D-Pad Right
MAP_BUTTON(ImGuiNavInput_DpadUp, SDL_CONTROLLER_BUTTON_DPAD_UP); // D-Pad Up
MAP_BUTTON(ImGuiNavInput_DpadDown, SDL_CONTROLLER_BUTTON_DPAD_DOWN); // D-Pad Down
MAP_BUTTON(ImGuiNavInput_FocusPrev, SDL_CONTROLLER_BUTTON_LEFTSHOULDER); // L1 / LB
MAP_BUTTON(ImGuiNavInput_FocusNext, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER); // R1 / RB
MAP_BUTTON(ImGuiNavInput_TweakSlow, SDL_CONTROLLER_BUTTON_LEFTSHOULDER); // L1 / LB
MAP_BUTTON(ImGuiNavInput_TweakFast, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER); // R1 / RB
MAP_ANALOG(ImGuiNavInput_LStickLeft, SDL_CONTROLLER_AXIS_LEFTX, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiNavInput_LStickRight, SDL_CONTROLLER_AXIS_LEFTX, +thumb_dead_zone, +32767);
MAP_ANALOG(ImGuiNavInput_LStickUp, SDL_CONTROLLER_AXIS_LEFTY, -thumb_dead_zone, -32767);
MAP_ANALOG(ImGuiNavInput_LStickDown, SDL_CONTROLLER_AXIS_LEFTY, +thumb_dead_zone, +32767);
io.BackendFlags |= ImGuiBackendFlags_HasGamepad;
#undef MAP_BUTTON
#undef MAP_ANALOG
}
void ImGui_ImplSDL2_NewFrame()
{
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
IM_ASSERT(bd != NULL && "Did you call ImGui_ImplSDL2_Init()?");
ImGuiIO& io = ImGui::GetIO();
// Setup display size (every frame to accommodate for window resizing)
int w, h;
int display_w, display_h;
SDL_GetWindowSize(bd->Window, &w, &h);
if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_MINIMIZED)
w = h = 0;
SDL_GL_GetDrawableSize(bd->Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)w, (float)h);
if (w > 0 && h > 0)
io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);
// Setup time step (we don't use SDL_GetTicks() because it is using millisecond resolution)
static Uint64 frequency = SDL_GetPerformanceFrequency();
Uint64 current_time = SDL_GetPerformanceCounter();
io.DeltaTime = bd->Time > 0 ? (float)((double)(current_time - bd->Time) / frequency) : (float)(1.0f / 60.0f);
bd->Time = current_time;
ImGui_ImplSDL2_UpdateMousePosAndButtons();
ImGui_ImplSDL2_UpdateMouseCursor();
// Update game controllers (if enabled and available)
ImGui_ImplSDL2_UpdateGamepads();
}

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// dear imgui: Platform Backend for SDL2
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
// (Info: SDL2 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)
// Implemented features:
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// [X] Platform: Clipboard support.
// [X] Platform: Keyboard arrays indexed using SDL_SCANCODE_* codes, e.g. ImGui::IsKeyPressed(SDL_SCANCODE_SPACE).
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// Missing features:
// [ ] Platform: SDL2 handling of IME under Windows appears to be broken and it explicitly disable the regular Windows IME. You can restore Windows IME by compiling SDL with SDL_DISABLE_WINDOWS_IME.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
#pragma once
#include "imgui.h" // IMGUI_IMPL_API
struct SDL_Window;
typedef union SDL_Event SDL_Event;
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForOpenGL(SDL_Window* window, void* sdl_gl_context);
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForVulkan(SDL_Window* window);
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForD3D(SDL_Window* window);
IMGUI_IMPL_API bool ImGui_ImplSDL2_InitForMetal(SDL_Window* window);
IMGUI_IMPL_API void ImGui_ImplSDL2_Shutdown();
IMGUI_IMPL_API void ImGui_ImplSDL2_NewFrame();
IMGUI_IMPL_API bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event);
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
static inline void ImGui_ImplSDL2_NewFrame(SDL_Window*) { ImGui_ImplSDL2_NewFrame(); } // 1.84: removed unnecessary parameter
#endif

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// [DEAR IMGUI]
// This is a slightly modified version of stb_rect_pack.h 1.00.
// Those changes would need to be pushed into nothings/stb:
// - Added STBRP__CDECL
// Grep for [DEAR IMGUI] to find the changes.
// stb_rect_pack.h - v1.00 - public domain - rectangle packing
// Sean Barrett 2014
//
// Useful for e.g. packing rectangular textures into an atlas.
// Does not do rotation.
//
// Not necessarily the awesomest packing method, but better than
// the totally naive one in stb_truetype (which is primarily what
// this is meant to replace).
//
// Has only had a few tests run, may have issues.
//
// More docs to come.
//
// No memory allocations; uses qsort() and assert() from stdlib.
// Can override those by defining STBRP_SORT and STBRP_ASSERT.
//
// This library currently uses the Skyline Bottom-Left algorithm.
//
// Please note: better rectangle packers are welcome! Please
// implement them to the same API, but with a different init
// function.
//
// Credits
//
// Library
// Sean Barrett
// Minor features
// Martins Mozeiko
// github:IntellectualKitty
//
// Bugfixes / warning fixes
// Jeremy Jaussaud
// Fabian Giesen
//
// Version history:
//
// 1.00 (2019-02-25) avoid small space waste; gracefully fail too-wide rectangles
// 0.99 (2019-02-07) warning fixes
// 0.11 (2017-03-03) return packing success/fail result
// 0.10 (2016-10-25) remove cast-away-const to avoid warnings
// 0.09 (2016-08-27) fix compiler warnings
// 0.08 (2015-09-13) really fix bug with empty rects (w=0 or h=0)
// 0.07 (2015-09-13) fix bug with empty rects (w=0 or h=0)
// 0.06 (2015-04-15) added STBRP_SORT to allow replacing qsort
// 0.05: added STBRP_ASSERT to allow replacing assert
// 0.04: fixed minor bug in STBRP_LARGE_RECTS support
// 0.01: initial release
//
// LICENSE
//
// See end of file for license information.
//////////////////////////////////////////////////////////////////////////////
//
// INCLUDE SECTION
//
#ifndef STB_INCLUDE_STB_RECT_PACK_H
#define STB_INCLUDE_STB_RECT_PACK_H
#define STB_RECT_PACK_VERSION 1
#ifdef STBRP_STATIC
#define STBRP_DEF static
#else
#define STBRP_DEF extern
#endif
#ifdef __cplusplus
extern "C" {
#endif
typedef struct stbrp_context stbrp_context;
typedef struct stbrp_node stbrp_node;
typedef struct stbrp_rect stbrp_rect;
#ifdef STBRP_LARGE_RECTS
typedef int stbrp_coord;
#else
typedef unsigned short stbrp_coord;
#endif
STBRP_DEF int stbrp_pack_rects (stbrp_context *context, stbrp_rect *rects, int num_rects);
// Assign packed locations to rectangles. The rectangles are of type
// 'stbrp_rect' defined below, stored in the array 'rects', and there
// are 'num_rects' many of them.
//
// Rectangles which are successfully packed have the 'was_packed' flag
// set to a non-zero value and 'x' and 'y' store the minimum location
// on each axis (i.e. bottom-left in cartesian coordinates, top-left
// if you imagine y increasing downwards). Rectangles which do not fit
// have the 'was_packed' flag set to 0.
//
// You should not try to access the 'rects' array from another thread
// while this function is running, as the function temporarily reorders
// the array while it executes.
//
// To pack into another rectangle, you need to call stbrp_init_target
// again. To continue packing into the same rectangle, you can call
// this function again. Calling this multiple times with multiple rect
// arrays will probably produce worse packing results than calling it
// a single time with the full rectangle array, but the option is
// available.
//
// The function returns 1 if all of the rectangles were successfully
// packed and 0 otherwise.
struct stbrp_rect
{
// reserved for your use:
int id;
// input:
stbrp_coord w, h;
// output:
stbrp_coord x, y;
int was_packed; // non-zero if valid packing
}; // 16 bytes, nominally
STBRP_DEF void stbrp_init_target (stbrp_context *context, int width, int height, stbrp_node *nodes, int num_nodes);
// Initialize a rectangle packer to:
// pack a rectangle that is 'width' by 'height' in dimensions
// using temporary storage provided by the array 'nodes', which is 'num_nodes' long
//
// You must call this function every time you start packing into a new target.
//
// There is no "shutdown" function. The 'nodes' memory must stay valid for
// the following stbrp_pack_rects() call (or calls), but can be freed after
// the call (or calls) finish.
//
// Note: to guarantee best results, either:
// 1. make sure 'num_nodes' >= 'width'
// or 2. call stbrp_allow_out_of_mem() defined below with 'allow_out_of_mem = 1'
//
// If you don't do either of the above things, widths will be quantized to multiples
// of small integers to guarantee the algorithm doesn't run out of temporary storage.
//
// If you do #2, then the non-quantized algorithm will be used, but the algorithm
// may run out of temporary storage and be unable to pack some rectangles.
STBRP_DEF void stbrp_setup_allow_out_of_mem (stbrp_context *context, int allow_out_of_mem);
// Optionally call this function after init but before doing any packing to
// change the handling of the out-of-temp-memory scenario, described above.
// If you call init again, this will be reset to the default (false).
STBRP_DEF void stbrp_setup_heuristic (stbrp_context *context, int heuristic);
// Optionally select which packing heuristic the library should use. Different
// heuristics will produce better/worse results for different data sets.
// If you call init again, this will be reset to the default.
enum
{
STBRP_HEURISTIC_Skyline_default=0,
STBRP_HEURISTIC_Skyline_BL_sortHeight = STBRP_HEURISTIC_Skyline_default,
STBRP_HEURISTIC_Skyline_BF_sortHeight
};
//////////////////////////////////////////////////////////////////////////////
//
// the details of the following structures don't matter to you, but they must
// be visible so you can handle the memory allocations for them
struct stbrp_node
{
stbrp_coord x,y;
stbrp_node *next;
};
struct stbrp_context
{
int width;
int height;
int align;
int init_mode;
int heuristic;
int num_nodes;
stbrp_node *active_head;
stbrp_node *free_head;
stbrp_node extra[2]; // we allocate two extra nodes so optimal user-node-count is 'width' not 'width+2'
};
#ifdef __cplusplus
}
#endif
#endif
//////////////////////////////////////////////////////////////////////////////
//
// IMPLEMENTATION SECTION
//
#ifdef STB_RECT_PACK_IMPLEMENTATION
#ifndef STBRP_SORT
#include <stdlib.h>
#define STBRP_SORT qsort
#endif
#ifndef STBRP_ASSERT
#include <assert.h>
#define STBRP_ASSERT assert
#endif
// [DEAR IMGUI] Added STBRP__CDECL
#ifdef _MSC_VER
#define STBRP__NOTUSED(v) (void)(v)
#define STBRP__CDECL __cdecl
#else
#define STBRP__NOTUSED(v) (void)sizeof(v)
#define STBRP__CDECL
#endif
enum
{
STBRP__INIT_skyline = 1
};
STBRP_DEF void stbrp_setup_heuristic(stbrp_context *context, int heuristic)
{
switch (context->init_mode) {
case STBRP__INIT_skyline:
STBRP_ASSERT(heuristic == STBRP_HEURISTIC_Skyline_BL_sortHeight || heuristic == STBRP_HEURISTIC_Skyline_BF_sortHeight);
context->heuristic = heuristic;
break;
default:
STBRP_ASSERT(0);
}
}
STBRP_DEF void stbrp_setup_allow_out_of_mem(stbrp_context *context, int allow_out_of_mem)
{
if (allow_out_of_mem)
// if it's ok to run out of memory, then don't bother aligning them;
// this gives better packing, but may fail due to OOM (even though
// the rectangles easily fit). @TODO a smarter approach would be to only
// quantize once we've hit OOM, then we could get rid of this parameter.
context->align = 1;
else {
// if it's not ok to run out of memory, then quantize the widths
// so that num_nodes is always enough nodes.
//
// I.e. num_nodes * align >= width
// align >= width / num_nodes
// align = ceil(width/num_nodes)
context->align = (context->width + context->num_nodes-1) / context->num_nodes;
}
}
STBRP_DEF void stbrp_init_target(stbrp_context *context, int width, int height, stbrp_node *nodes, int num_nodes)
{
int i;
#ifndef STBRP_LARGE_RECTS
STBRP_ASSERT(width <= 0xffff && height <= 0xffff);
#endif
for (i=0; i < num_nodes-1; ++i)
nodes[i].next = &nodes[i+1];
nodes[i].next = NULL;
context->init_mode = STBRP__INIT_skyline;
context->heuristic = STBRP_HEURISTIC_Skyline_default;
context->free_head = &nodes[0];
context->active_head = &context->extra[0];
context->width = width;
context->height = height;
context->num_nodes = num_nodes;
stbrp_setup_allow_out_of_mem(context, 0);
// node 0 is the full width, node 1 is the sentinel (lets us not store width explicitly)
context->extra[0].x = 0;
context->extra[0].y = 0;
context->extra[0].next = &context->extra[1];
context->extra[1].x = (stbrp_coord) width;
#ifdef STBRP_LARGE_RECTS
context->extra[1].y = (1<<30);
#else
context->extra[1].y = 65535;
#endif
context->extra[1].next = NULL;
}
// find minimum y position if it starts at x1
static int stbrp__skyline_find_min_y(stbrp_context *c, stbrp_node *first, int x0, int width, int *pwaste)
{
stbrp_node *node = first;
int x1 = x0 + width;
int min_y, visited_width, waste_area;
STBRP__NOTUSED(c);
STBRP_ASSERT(first->x <= x0);
#if 0
// skip in case we're past the node
while (node->next->x <= x0)
++node;
#else
STBRP_ASSERT(node->next->x > x0); // we ended up handling this in the caller for efficiency
#endif
STBRP_ASSERT(node->x <= x0);
min_y = 0;
waste_area = 0;
visited_width = 0;
while (node->x < x1) {
if (node->y > min_y) {
// raise min_y higher.
// we've accounted for all waste up to min_y,
// but we'll now add more waste for everything we've visted
waste_area += visited_width * (node->y - min_y);
min_y = node->y;
// the first time through, visited_width might be reduced
if (node->x < x0)
visited_width += node->next->x - x0;
else
visited_width += node->next->x - node->x;
} else {
// add waste area
int under_width = node->next->x - node->x;
if (under_width + visited_width > width)
under_width = width - visited_width;
waste_area += under_width * (min_y - node->y);
visited_width += under_width;
}
node = node->next;
}
*pwaste = waste_area;
return min_y;
}
typedef struct
{
int x,y;
stbrp_node **prev_link;
} stbrp__findresult;
static stbrp__findresult stbrp__skyline_find_best_pos(stbrp_context *c, int width, int height)
{
int best_waste = (1<<30), best_x, best_y = (1 << 30);
stbrp__findresult fr;
stbrp_node **prev, *node, *tail, **best = NULL;
// align to multiple of c->align
width = (width + c->align - 1);
width -= width % c->align;
STBRP_ASSERT(width % c->align == 0);
// if it can't possibly fit, bail immediately
if (width > c->width || height > c->height) {
fr.prev_link = NULL;
fr.x = fr.y = 0;
return fr;
}
node = c->active_head;
prev = &c->active_head;
while (node->x + width <= c->width) {
int y,waste;
y = stbrp__skyline_find_min_y(c, node, node->x, width, &waste);
if (c->heuristic == STBRP_HEURISTIC_Skyline_BL_sortHeight) { // actually just want to test BL
// bottom left
if (y < best_y) {
best_y = y;
best = prev;
}
} else {
// best-fit
if (y + height <= c->height) {
// can only use it if it first vertically
if (y < best_y || (y == best_y && waste < best_waste)) {
best_y = y;
best_waste = waste;
best = prev;
}
}
}
prev = &node->next;
node = node->next;
}
best_x = (best == NULL) ? 0 : (*best)->x;
// if doing best-fit (BF), we also have to try aligning right edge to each node position
//
// e.g, if fitting
//
// ____________________
// |____________________|
//
// into
//
// | |
// | ____________|
// |____________|
//
// then right-aligned reduces waste, but bottom-left BL is always chooses left-aligned
//
// This makes BF take about 2x the time
if (c->heuristic == STBRP_HEURISTIC_Skyline_BF_sortHeight) {
tail = c->active_head;
node = c->active_head;
prev = &c->active_head;
// find first node that's admissible
while (tail->x < width)
tail = tail->next;
while (tail) {
int xpos = tail->x - width;
int y,waste;
STBRP_ASSERT(xpos >= 0);
// find the left position that matches this
while (node->next->x <= xpos) {
prev = &node->next;
node = node->next;
}
STBRP_ASSERT(node->next->x > xpos && node->x <= xpos);
y = stbrp__skyline_find_min_y(c, node, xpos, width, &waste);
if (y + height <= c->height) {
if (y <= best_y) {
if (y < best_y || waste < best_waste || (waste==best_waste && xpos < best_x)) {
best_x = xpos;
STBRP_ASSERT(y <= best_y);
best_y = y;
best_waste = waste;
best = prev;
}
}
}
tail = tail->next;
}
}
fr.prev_link = best;
fr.x = best_x;
fr.y = best_y;
return fr;
}
static stbrp__findresult stbrp__skyline_pack_rectangle(stbrp_context *context, int width, int height)
{
// find best position according to heuristic
stbrp__findresult res = stbrp__skyline_find_best_pos(context, width, height);
stbrp_node *node, *cur;
// bail if:
// 1. it failed
// 2. the best node doesn't fit (we don't always check this)
// 3. we're out of memory
if (res.prev_link == NULL || res.y + height > context->height || context->free_head == NULL) {
res.prev_link = NULL;
return res;
}
// on success, create new node
node = context->free_head;
node->x = (stbrp_coord) res.x;
node->y = (stbrp_coord) (res.y + height);
context->free_head = node->next;
// insert the new node into the right starting point, and
// let 'cur' point to the remaining nodes needing to be
// stiched back in
cur = *res.prev_link;
if (cur->x < res.x) {
// preserve the existing one, so start testing with the next one
stbrp_node *next = cur->next;
cur->next = node;
cur = next;
} else {
*res.prev_link = node;
}
// from here, traverse cur and free the nodes, until we get to one
// that shouldn't be freed
while (cur->next && cur->next->x <= res.x + width) {
stbrp_node *next = cur->next;
// move the current node to the free list
cur->next = context->free_head;
context->free_head = cur;
cur = next;
}
// stitch the list back in
node->next = cur;
if (cur->x < res.x + width)
cur->x = (stbrp_coord) (res.x + width);
#ifdef _DEBUG
cur = context->active_head;
while (cur->x < context->width) {
STBRP_ASSERT(cur->x < cur->next->x);
cur = cur->next;
}
STBRP_ASSERT(cur->next == NULL);
{
int count=0;
cur = context->active_head;
while (cur) {
cur = cur->next;
++count;
}
cur = context->free_head;
while (cur) {
cur = cur->next;
++count;
}
STBRP_ASSERT(count == context->num_nodes+2);
}
#endif
return res;
}
// [DEAR IMGUI] Added STBRP__CDECL
static int STBRP__CDECL rect_height_compare(const void *a, const void *b)
{
const stbrp_rect *p = (const stbrp_rect *) a;
const stbrp_rect *q = (const stbrp_rect *) b;
if (p->h > q->h)
return -1;
if (p->h < q->h)
return 1;
return (p->w > q->w) ? -1 : (p->w < q->w);
}
// [DEAR IMGUI] Added STBRP__CDECL
static int STBRP__CDECL rect_original_order(const void *a, const void *b)
{
const stbrp_rect *p = (const stbrp_rect *) a;
const stbrp_rect *q = (const stbrp_rect *) b;
return (p->was_packed < q->was_packed) ? -1 : (p->was_packed > q->was_packed);
}
#ifdef STBRP_LARGE_RECTS
#define STBRP__MAXVAL 0xffffffff
#else
#define STBRP__MAXVAL 0xffff
#endif
STBRP_DEF int stbrp_pack_rects(stbrp_context *context, stbrp_rect *rects, int num_rects)
{
int i, all_rects_packed = 1;
// we use the 'was_packed' field internally to allow sorting/unsorting
for (i=0; i < num_rects; ++i) {
rects[i].was_packed = i;
}
// sort according to heuristic
STBRP_SORT(rects, num_rects, sizeof(rects[0]), rect_height_compare);
for (i=0; i < num_rects; ++i) {
if (rects[i].w == 0 || rects[i].h == 0) {
rects[i].x = rects[i].y = 0; // empty rect needs no space
} else {
stbrp__findresult fr = stbrp__skyline_pack_rectangle(context, rects[i].w, rects[i].h);
if (fr.prev_link) {
rects[i].x = (stbrp_coord) fr.x;
rects[i].y = (stbrp_coord) fr.y;
} else {
rects[i].x = rects[i].y = STBRP__MAXVAL;
}
}
}
// unsort
STBRP_SORT(rects, num_rects, sizeof(rects[0]), rect_original_order);
// set was_packed flags and all_rects_packed status
for (i=0; i < num_rects; ++i) {
rects[i].was_packed = !(rects[i].x == STBRP__MAXVAL && rects[i].y == STBRP__MAXVAL);
if (!rects[i].was_packed)
all_rects_packed = 0;
}
// return the all_rects_packed status
return all_rects_packed;
}
#endif
/*
------------------------------------------------------------------------------
This software is available under 2 licenses -- choose whichever you prefer.
------------------------------------------------------------------------------
ALTERNATIVE A - MIT License
Copyright (c) 2017 Sean Barrett
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
------------------------------------------------------------------------------
ALTERNATIVE B - Public Domain (www.unlicense.org)
This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
software, either in source code form or as a compiled binary, for any purpose,
commercial or non-commercial, and by any means.
In jurisdictions that recognize copyright laws, the author or authors of this
software dedicate any and all copyright interest in the software to the public
domain. We make this dedication for the benefit of the public at large and to
the detriment of our heirs and successors. We intend this dedication to be an
overt act of relinquishment in perpetuity of all present and future rights to
this software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
------------------------------------------------------------------------------
*/

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#include "node_editor.h"
#include "graph.h"
#include <imnodes.h>
#include <imgui.h>
#include <SDL_keycode.h>
#include <SDL_timer.h>
#include <algorithm>
#include <cassert>
#include <chrono>
#include <cmath>
#include <vector>
namespace example
{
namespace
{
enum class NodeType
{
add,
multiply,
output,
sine,
time,
value
};
struct Node
{
NodeType type;
float value;
explicit Node(const NodeType t) : type(t), value(0.f) {}
Node(const NodeType t, const float v) : type(t), value(v) {}
};
template<class T>
T clamp(T x, T a, T b)
{
return std::min(b, std::max(x, a));
}
static float current_time_seconds = 0.f;
static bool emulate_three_button_mouse = false;
ImU32 evaluate(const Graph<Node>& graph, const int root_node)
{
std::stack<int> postorder;
dfs_traverse(
graph, root_node, [&postorder](const int node_id) -> void { postorder.push(node_id); });
std::stack<float> value_stack;
while (!postorder.empty())
{
const int id = postorder.top();
postorder.pop();
const Node node = graph.node(id);
switch (node.type)
{
case NodeType::add:
{
const float rhs = value_stack.top();
value_stack.pop();
const float lhs = value_stack.top();
value_stack.pop();
value_stack.push(lhs + rhs);
}
break;
case NodeType::multiply:
{
const float rhs = value_stack.top();
value_stack.pop();
const float lhs = value_stack.top();
value_stack.pop();
value_stack.push(rhs * lhs);
}
break;
case NodeType::sine:
{
const float x = value_stack.top();
value_stack.pop();
const float res = std::abs(std::sin(x));
value_stack.push(res);
}
break;
case NodeType::time:
{
value_stack.push(current_time_seconds);
}
break;
case NodeType::value:
{
// If the edge does not have an edge connecting to another node, then just use the value
// at this node. It means the node's input pin has not been connected to anything and
// the value comes from the node's UI.
if (graph.num_edges_from_node(id) == 0ull)
{
value_stack.push(node.value);
}
}
break;
default:
break;
}
}
// The final output node isn't evaluated in the loop -- instead we just pop
// the three values which should be in the stack.
assert(value_stack.size() == 3ull);
const int b = static_cast<int>(255.f * clamp(value_stack.top(), 0.f, 1.f) + 0.5f);
value_stack.pop();
const int g = static_cast<int>(255.f * clamp(value_stack.top(), 0.f, 1.f) + 0.5f);
value_stack.pop();
const int r = static_cast<int>(255.f * clamp(value_stack.top(), 0.f, 1.f) + 0.5f);
value_stack.pop();
return IM_COL32(r, g, b, 255);
}
class ColorNodeEditor
{
public:
ColorNodeEditor() : graph_(), nodes_(), root_node_id_(-1),
minimap_location_(ImNodesMiniMapLocation_BottomRight) {}
void show()
{
// Update timer context
current_time_seconds = 0.001f * SDL_GetTicks();
auto flags = ImGuiWindowFlags_MenuBar;
// The node editor window
ImGui::Begin("color node editor", NULL, flags);
if (ImGui::BeginMenuBar())
{
if (ImGui::BeginMenu("Mini-map"))
{
const char* names[] = {
"Top Left",
"Top Right",
"Bottom Left",
"Bottom Right",
};
int locations[] = {
ImNodesMiniMapLocation_TopLeft,
ImNodesMiniMapLocation_TopRight,
ImNodesMiniMapLocation_BottomLeft,
ImNodesMiniMapLocation_BottomRight,
};
for (int i = 0; i < 4; i++)
{
bool selected = minimap_location_ == locations[i];
if (ImGui::MenuItem(names[i], NULL, &selected))
minimap_location_ = locations[i];
}
ImGui::EndMenu();
}
if (ImGui::BeginMenu("Style"))
{
if (ImGui::MenuItem("Classic"))
{
ImGui::StyleColorsClassic();
ImNodes::StyleColorsClassic();
}
if (ImGui::MenuItem("Dark"))
{
ImGui::StyleColorsDark();
ImNodes::StyleColorsDark();
}
if (ImGui::MenuItem("Light"))
{
ImGui::StyleColorsLight();
ImNodes::StyleColorsLight();
}
ImGui::EndMenu();
}
ImGui::EndMenuBar();
}
ImGui::TextUnformatted("Edit the color of the output color window using nodes.");
ImGui::Columns(2);
ImGui::TextUnformatted("A -- add node");
ImGui::TextUnformatted("X -- delete selected node or link");
ImGui::NextColumn();
if (ImGui::Checkbox("emulate_three_button_mouse", &emulate_three_button_mouse))
{
ImNodes::GetIO().EmulateThreeButtonMouse.Modifier =
emulate_three_button_mouse ? &ImGui::GetIO().KeyAlt : NULL;
}
ImGui::Columns(1);
ImNodes::BeginNodeEditor();
// Handle new nodes
// These are driven by the user, so we place this code before rendering the nodes
{
const bool open_popup = ImGui::IsWindowFocused(ImGuiFocusedFlags_RootAndChildWindows) &&
ImNodes::IsEditorHovered() &&
ImGui::IsKeyReleased(SDL_SCANCODE_A);
ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(8.f, 8.f));
if (!ImGui::IsAnyItemHovered() && open_popup)
{
ImGui::OpenPopup("add node");
}
if (ImGui::BeginPopup("add node"))
{
const ImVec2 click_pos = ImGui::GetMousePosOnOpeningCurrentPopup();
if (ImGui::MenuItem("add"))
{
const Node value(NodeType::value, 0.f);
const Node op(NodeType::add);
UiNode ui_node;
ui_node.type = UiNodeType::add;
ui_node.add.lhs = graph_.insert_node(value);
ui_node.add.rhs = graph_.insert_node(value);
ui_node.id = graph_.insert_node(op);
graph_.insert_edge(ui_node.id, ui_node.add.lhs);
graph_.insert_edge(ui_node.id, ui_node.add.rhs);
nodes_.push_back(ui_node);
ImNodes::SetNodeScreenSpacePos(ui_node.id, click_pos);
}
if (ImGui::MenuItem("multiply"))
{
const Node value(NodeType::value, 0.f);
const Node op(NodeType::multiply);
UiNode ui_node;
ui_node.type = UiNodeType::multiply;
ui_node.multiply.lhs = graph_.insert_node(value);
ui_node.multiply.rhs = graph_.insert_node(value);
ui_node.id = graph_.insert_node(op);
graph_.insert_edge(ui_node.id, ui_node.multiply.lhs);
graph_.insert_edge(ui_node.id, ui_node.multiply.rhs);
nodes_.push_back(ui_node);
ImNodes::SetNodeScreenSpacePos(ui_node.id, click_pos);
}
if (ImGui::MenuItem("output") && root_node_id_ == -1)
{
const Node value(NodeType::value, 0.f);
const Node out(NodeType::output);
UiNode ui_node;
ui_node.type = UiNodeType::output;
ui_node.output.r = graph_.insert_node(value);
ui_node.output.g = graph_.insert_node(value);
ui_node.output.b = graph_.insert_node(value);
ui_node.id = graph_.insert_node(out);
graph_.insert_edge(ui_node.id, ui_node.output.r);
graph_.insert_edge(ui_node.id, ui_node.output.g);
graph_.insert_edge(ui_node.id, ui_node.output.b);
nodes_.push_back(ui_node);
ImNodes::SetNodeScreenSpacePos(ui_node.id, click_pos);
root_node_id_ = ui_node.id;
}
if (ImGui::MenuItem("sine"))
{
const Node value(NodeType::value, 0.f);
const Node op(NodeType::sine);
UiNode ui_node;
ui_node.type = UiNodeType::sine;
ui_node.sine.input = graph_.insert_node(value);
ui_node.id = graph_.insert_node(op);
graph_.insert_edge(ui_node.id, ui_node.sine.input);
nodes_.push_back(ui_node);
ImNodes::SetNodeScreenSpacePos(ui_node.id, click_pos);
}
if (ImGui::MenuItem("time"))
{
UiNode ui_node;
ui_node.type = UiNodeType::time;
ui_node.id = graph_.insert_node(Node(NodeType::time));
nodes_.push_back(ui_node);
ImNodes::SetNodeScreenSpacePos(ui_node.id, click_pos);
}
ImGui::EndPopup();
}
ImGui::PopStyleVar();
}
for (const UiNode& node : nodes_)
{
switch (node.type)
{
case UiNodeType::add:
{
const float node_width = 100.f;
ImNodes::BeginNode(node.id);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("add");
ImNodes::EndNodeTitleBar();
{
ImNodes::BeginInputAttribute(node.add.lhs);
const float label_width = ImGui::CalcTextSize("left").x;
ImGui::TextUnformatted("left");
if (graph_.num_edges_from_node(node.add.lhs) == 0ull)
{
ImGui::SameLine();
ImGui::PushItemWidth(node_width - label_width);
ImGui::DragFloat("##hidelabel", &graph_.node(node.add.lhs).value, 0.01f);
ImGui::PopItemWidth();
}
ImNodes::EndInputAttribute();
}
{
ImNodes::BeginInputAttribute(node.add.rhs);
const float label_width = ImGui::CalcTextSize("right").x;
ImGui::TextUnformatted("right");
if (graph_.num_edges_from_node(node.add.rhs) == 0ull)
{
ImGui::SameLine();
ImGui::PushItemWidth(node_width - label_width);
ImGui::DragFloat("##hidelabel", &graph_.node(node.add.rhs).value, 0.01f);
ImGui::PopItemWidth();
}
ImNodes::EndInputAttribute();
}
ImGui::Spacing();
{
ImNodes::BeginOutputAttribute(node.id);
const float label_width = ImGui::CalcTextSize("result").x;
ImGui::Indent(node_width - label_width);
ImGui::TextUnformatted("result");
ImNodes::EndOutputAttribute();
}
ImNodes::EndNode();
}
break;
case UiNodeType::multiply:
{
const float node_width = 100.0f;
ImNodes::BeginNode(node.id);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("multiply");
ImNodes::EndNodeTitleBar();
{
ImNodes::BeginInputAttribute(node.multiply.lhs);
const float label_width = ImGui::CalcTextSize("left").x;
ImGui::TextUnformatted("left");
if (graph_.num_edges_from_node(node.multiply.lhs) == 0ull)
{
ImGui::SameLine();
ImGui::PushItemWidth(node_width - label_width);
ImGui::DragFloat(
"##hidelabel", &graph_.node(node.multiply.lhs).value, 0.01f);
ImGui::PopItemWidth();
}
ImNodes::EndInputAttribute();
}
{
ImNodes::BeginInputAttribute(node.multiply.rhs);
const float label_width = ImGui::CalcTextSize("right").x;
ImGui::TextUnformatted("right");
if (graph_.num_edges_from_node(node.multiply.rhs) == 0ull)
{
ImGui::SameLine();
ImGui::PushItemWidth(node_width - label_width);
ImGui::DragFloat(
"##hidelabel", &graph_.node(node.multiply.rhs).value, 0.01f);
ImGui::PopItemWidth();
}
ImNodes::EndInputAttribute();
}
ImGui::Spacing();
{
ImNodes::BeginOutputAttribute(node.id);
const float label_width = ImGui::CalcTextSize("result").x;
ImGui::Indent(node_width - label_width);
ImGui::TextUnformatted("result");
ImNodes::EndOutputAttribute();
}
ImNodes::EndNode();
}
break;
case UiNodeType::output:
{
const float node_width = 100.0f;
ImNodes::PushColorStyle(ImNodesCol_TitleBar, IM_COL32(11, 109, 191, 255));
ImNodes::PushColorStyle(ImNodesCol_TitleBarHovered, IM_COL32(45, 126, 194, 255));
ImNodes::PushColorStyle(ImNodesCol_TitleBarSelected, IM_COL32(81, 148, 204, 255));
ImNodes::BeginNode(node.id);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("output");
ImNodes::EndNodeTitleBar();
ImGui::Dummy(ImVec2(node_width, 0.f));
{
ImNodes::BeginInputAttribute(node.output.r);
const float label_width = ImGui::CalcTextSize("r").x;
ImGui::TextUnformatted("r");
if (graph_.num_edges_from_node(node.output.r) == 0ull)
{
ImGui::SameLine();
ImGui::PushItemWidth(node_width - label_width);
ImGui::DragFloat(
"##hidelabel", &graph_.node(node.output.r).value, 0.01f, 0.f, 1.0f);
ImGui::PopItemWidth();
}
ImNodes::EndInputAttribute();
}
ImGui::Spacing();
{
ImNodes::BeginInputAttribute(node.output.g);
const float label_width = ImGui::CalcTextSize("g").x;
ImGui::TextUnformatted("g");
if (graph_.num_edges_from_node(node.output.g) == 0ull)
{
ImGui::SameLine();
ImGui::PushItemWidth(node_width - label_width);
ImGui::DragFloat(
"##hidelabel", &graph_.node(node.output.g).value, 0.01f, 0.f, 1.f);
ImGui::PopItemWidth();
}
ImNodes::EndInputAttribute();
}
ImGui::Spacing();
{
ImNodes::BeginInputAttribute(node.output.b);
const float label_width = ImGui::CalcTextSize("b").x;
ImGui::TextUnformatted("b");
if (graph_.num_edges_from_node(node.output.b) == 0ull)
{
ImGui::SameLine();
ImGui::PushItemWidth(node_width - label_width);
ImGui::DragFloat(
"##hidelabel", &graph_.node(node.output.b).value, 0.01f, 0.f, 1.0f);
ImGui::PopItemWidth();
}
ImNodes::EndInputAttribute();
}
ImNodes::EndNode();
ImNodes::PopColorStyle();
ImNodes::PopColorStyle();
ImNodes::PopColorStyle();
}
break;
case UiNodeType::sine:
{
const float node_width = 100.0f;
ImNodes::BeginNode(node.id);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("sine");
ImNodes::EndNodeTitleBar();
{
ImNodes::BeginInputAttribute(node.sine.input);
const float label_width = ImGui::CalcTextSize("number").x;
ImGui::TextUnformatted("number");
if (graph_.num_edges_from_node(node.sine.input) == 0ull)
{
ImGui::SameLine();
ImGui::PushItemWidth(node_width - label_width);
ImGui::DragFloat(
"##hidelabel", &graph_.node(node.sine.input).value, 0.01f, 0.f, 1.0f);
ImGui::PopItemWidth();
}
ImNodes::EndInputAttribute();
}
ImGui::Spacing();
{
ImNodes::BeginOutputAttribute(node.id);
const float label_width = ImGui::CalcTextSize("output").x;
ImGui::Indent(node_width - label_width);
ImGui::TextUnformatted("output");
ImNodes::EndInputAttribute();
}
ImNodes::EndNode();
}
break;
case UiNodeType::time:
{
ImNodes::BeginNode(node.id);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("time");
ImNodes::EndNodeTitleBar();
ImNodes::BeginOutputAttribute(node.id);
ImGui::Text("output");
ImNodes::EndOutputAttribute();
ImNodes::EndNode();
}
break;
}
}
for (const auto& edge : graph_.edges())
{
// If edge doesn't start at value, then it's an internal edge, i.e.
// an edge which links a node's operation to its input. We don't
// want to render node internals with visible links.
if (graph_.node(edge.from).type != NodeType::value)
continue;
ImNodes::Link(edge.id, edge.from, edge.to);
}
ImNodes::MiniMap(0.2f, minimap_location_);
ImNodes::EndNodeEditor();
// Handle new links
// These are driven by Imnodes, so we place the code after EndNodeEditor().
{
int start_attr, end_attr;
if (ImNodes::IsLinkCreated(&start_attr, &end_attr))
{
const NodeType start_type = graph_.node(start_attr).type;
const NodeType end_type = graph_.node(end_attr).type;
const bool valid_link = start_type != end_type;
if (valid_link)
{
// Ensure the edge is always directed from the value to
// whatever produces the value
if (start_type != NodeType::value)
{
std::swap(start_attr, end_attr);
}
graph_.insert_edge(start_attr, end_attr);
}
}
}
// Handle deleted links
{
int link_id;
if (ImNodes::IsLinkDestroyed(&link_id))
{
graph_.erase_edge(link_id);
}
}
{
const int num_selected = ImNodes::NumSelectedLinks();
if (num_selected > 0 && ImGui::IsKeyReleased(SDL_SCANCODE_X))
{
static std::vector<int> selected_links;
selected_links.resize(static_cast<size_t>(num_selected));
ImNodes::GetSelectedLinks(selected_links.data());
for (const int edge_id : selected_links)
{
graph_.erase_edge(edge_id);
}
}
}
{
const int num_selected = ImNodes::NumSelectedNodes();
if (num_selected > 0 && ImGui::IsKeyReleased(SDL_SCANCODE_X))
{
static std::vector<int> selected_nodes;
selected_nodes.resize(static_cast<size_t>(num_selected));
ImNodes::GetSelectedNodes(selected_nodes.data());
for (const int node_id : selected_nodes)
{
graph_.erase_node(node_id);
auto iter = std::find_if(
nodes_.begin(), nodes_.end(), [node_id](const UiNode& node) -> bool {
return node.id == node_id;
});
// Erase any additional internal nodes
switch (iter->type)
{
case UiNodeType::add:
graph_.erase_node(iter->add.lhs);
graph_.erase_node(iter->add.rhs);
break;
case UiNodeType::multiply:
graph_.erase_node(iter->multiply.lhs);
graph_.erase_node(iter->multiply.rhs);
break;
case UiNodeType::output:
graph_.erase_node(iter->output.r);
graph_.erase_node(iter->output.g);
graph_.erase_node(iter->output.b);
root_node_id_ = -1;
break;
case UiNodeType::sine:
graph_.erase_node(iter->sine.input);
break;
default:
break;
}
nodes_.erase(iter);
}
}
}
ImGui::End();
// The color output window
const ImU32 color =
root_node_id_ != -1 ? evaluate(graph_, root_node_id_) : IM_COL32(255, 20, 147, 255);
ImGui::PushStyleColor(ImGuiCol_WindowBg, color);
ImGui::Begin("output color");
ImGui::End();
ImGui::PopStyleColor();
}
private:
enum class UiNodeType
{
add,
multiply,
output,
sine,
time,
};
struct UiNode
{
UiNodeType type;
// The identifying id of the ui node. For add, multiply, sine, and time
// this is the "operation" node id. The additional input nodes are
// stored in the structs.
int id;
union
{
struct
{
int lhs, rhs;
} add;
struct
{
int lhs, rhs;
} multiply;
struct
{
int r, g, b;
} output;
struct
{
int input;
} sine;
};
};
Graph<Node> graph_;
std::vector<UiNode> nodes_;
int root_node_id_;
ImNodesMiniMapLocation minimap_location_;
};
static ColorNodeEditor color_editor;
} // namespace
void NodeEditorInitialize()
{
ImNodesIO& io = ImNodes::GetIO();
io.LinkDetachWithModifierClick.Modifier = &ImGui::GetIO().KeyCtrl;
}
void NodeEditorShow() { color_editor.show(); }
void NodeEditorShutdown() {}
} // namespace example

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#pragma once
#include <algorithm>
#include <cassert>
#include <iterator>
#include <stack>
#include <stddef.h>
#include <utility>
#include <vector>
namespace example
{
template<typename ElementType>
struct Span
{
using iterator = ElementType*;
template<typename Container>
Span(Container& c) : begin_(c.data()), end_(begin_ + c.size())
{
}
iterator begin() const { return begin_; }
iterator end() const { return end_; }
private:
iterator begin_;
iterator end_;
};
template<typename ElementType>
class IdMap
{
public:
using iterator = typename std::vector<ElementType>::iterator;
using const_iterator = typename std::vector<ElementType>::const_iterator;
// Iterators
const_iterator begin() const { return elements_.begin(); }
const_iterator end() const { return elements_.end(); }
// Element access
Span<const ElementType> elements() const { return elements_; }
// Capacity
bool empty() const { return sorted_ids_.empty(); }
size_t size() const { return sorted_ids_.size(); }
// Modifiers
std::pair<iterator, bool> insert(int id, const ElementType& element);
std::pair<iterator, bool> insert(int id, ElementType&& element);
size_t erase(int id);
void clear();
// Lookup
iterator find(int id);
const_iterator find(int id) const;
bool contains(int id) const;
private:
std::vector<ElementType> elements_;
std::vector<int> sorted_ids_;
};
template<typename ElementType>
std::pair<typename IdMap<ElementType>::iterator, bool> IdMap<ElementType>::insert(
const int id,
const ElementType& element)
{
auto lower_bound = std::lower_bound(sorted_ids_.begin(), sorted_ids_.end(), id);
if (lower_bound != sorted_ids_.end() && id == *lower_bound)
{
return std::make_pair(
std::next(elements_.begin(), std::distance(sorted_ids_.begin(), lower_bound)), false);
}
auto insert_element_at =
std::next(elements_.begin(), std::distance(sorted_ids_.begin(), lower_bound));
sorted_ids_.insert(lower_bound, id);
return std::make_pair(elements_.insert(insert_element_at, element), true);
}
template<typename ElementType>
std::pair<typename IdMap<ElementType>::iterator, bool> IdMap<ElementType>::insert(
const int id,
ElementType&& element)
{
auto lower_bound = std::lower_bound(sorted_ids_.begin(), sorted_ids_.end(), id);
if (lower_bound != sorted_ids_.end() && id == *lower_bound)
{
return std::make_pair(
std::next(elements_.begin(), std::distance(sorted_ids_.begin(), lower_bound)), false);
}
auto insert_element_at =
std::next(elements_.begin(), std::distance(sorted_ids_.begin(), lower_bound));
sorted_ids_.insert(lower_bound, id);
return std::make_pair(elements_.insert(insert_element_at, std::move(element)), true);
}
template<typename ElementType>
size_t IdMap<ElementType>::erase(const int id)
{
auto lower_bound = std::lower_bound(sorted_ids_.begin(), sorted_ids_.end(), id);
if (lower_bound == sorted_ids_.end() || id != *lower_bound)
{
return 0ull;
}
auto erase_element_at =
std::next(elements_.begin(), std::distance(sorted_ids_.begin(), lower_bound));
sorted_ids_.erase(lower_bound);
elements_.erase(erase_element_at);
return 1ull;
}
template<typename ElementType>
void IdMap<ElementType>::clear()
{
elements_.clear();
sorted_ids_.clear();
}
template<typename ElementType>
typename IdMap<ElementType>::iterator IdMap<ElementType>::find(const int id)
{
const auto lower_bound = std::lower_bound(sorted_ids_.cbegin(), sorted_ids_.cend(), id);
return (lower_bound == sorted_ids_.cend() || *lower_bound != id)
? elements_.end()
: std::next(elements_.begin(), std::distance(sorted_ids_.cbegin(), lower_bound));
}
template<typename ElementType>
typename IdMap<ElementType>::const_iterator IdMap<ElementType>::find(const int id) const
{
const auto lower_bound = std::lower_bound(sorted_ids_.cbegin(), sorted_ids_.cend(), id);
return (lower_bound == sorted_ids_.cend() || *lower_bound != id)
? elements_.cend()
: std::next(elements_.cbegin(), std::distance(sorted_ids_.cbegin(), lower_bound));
}
template<typename ElementType>
bool IdMap<ElementType>::contains(const int id) const
{
const auto lower_bound = std::lower_bound(sorted_ids_.cbegin(), sorted_ids_.cend(), id);
if (lower_bound == sorted_ids_.cend())
{
return false;
}
return *lower_bound == id;
}
// a very simple directional graph
template<typename NodeType>
class Graph
{
public:
Graph() : current_id_(0), nodes_(), edges_from_node_(), node_neighbors_(), edges_() {}
struct Edge
{
int id;
int from, to;
Edge() = default;
Edge(const int id, const int f, const int t) : id(id), from(f), to(t) {}
inline int opposite(const int n) const { return n == from ? to : from; }
inline bool contains(const int n) const { return n == from || n == to; }
};
// Element access
NodeType& node(int node_id);
const NodeType& node(int node_id) const;
Span<const int> neighbors(int node_id) const;
Span<const Edge> edges() const;
// Capacity
size_t num_edges_from_node(int node_id) const;
// Modifiers
int insert_node(const NodeType& node);
void erase_node(int node_id);
int insert_edge(int from, int to);
void erase_edge(int edge_id);
private:
int current_id_;
// These contains map to the node id
IdMap<NodeType> nodes_;
IdMap<int> edges_from_node_;
IdMap<std::vector<int>> node_neighbors_;
// This container maps to the edge id
IdMap<Edge> edges_;
};
template<typename NodeType>
NodeType& Graph<NodeType>::node(const int id)
{
return const_cast<NodeType&>(static_cast<const Graph*>(this)->node(id));
}
template<typename NodeType>
const NodeType& Graph<NodeType>::node(const int id) const
{
const auto iter = nodes_.find(id);
assert(iter != nodes_.end());
return *iter;
}
template<typename NodeType>
Span<const int> Graph<NodeType>::neighbors(int node_id) const
{
const auto iter = node_neighbors_.find(node_id);
assert(iter != node_neighbors_.end());
return *iter;
}
template<typename NodeType>
Span<const typename Graph<NodeType>::Edge> Graph<NodeType>::edges() const
{
return edges_.elements();
}
template<typename NodeType>
size_t Graph<NodeType>::num_edges_from_node(const int id) const
{
auto iter = edges_from_node_.find(id);
assert(iter != edges_from_node_.end());
return *iter;
}
template<typename NodeType>
int Graph<NodeType>::insert_node(const NodeType& node)
{
const int id = current_id_++;
assert(!nodes_.contains(id));
nodes_.insert(id, node);
edges_from_node_.insert(id, 0);
node_neighbors_.insert(id, std::vector<int>());
return id;
}
template<typename NodeType>
void Graph<NodeType>::erase_node(const int id)
{
// first, remove any potential dangling edges
{
static std::vector<int> edges_to_erase;
for (const Edge& edge : edges_.elements())
{
if (edge.contains(id))
{
edges_to_erase.push_back(edge.id);
}
}
for (const int edge_id : edges_to_erase)
{
erase_edge(edge_id);
}
edges_to_erase.clear();
}
nodes_.erase(id);
edges_from_node_.erase(id);
node_neighbors_.erase(id);
}
template<typename NodeType>
int Graph<NodeType>::insert_edge(const int from, const int to)
{
const int id = current_id_++;
assert(!edges_.contains(id));
assert(nodes_.contains(from));
assert(nodes_.contains(to));
edges_.insert(id, Edge(id, from, to));
// update neighbor count
assert(edges_from_node_.contains(from));
*edges_from_node_.find(from) += 1;
// update neighbor list
assert(node_neighbors_.contains(from));
node_neighbors_.find(from)->push_back(to);
return id;
}
template<typename NodeType>
void Graph<NodeType>::erase_edge(const int edge_id)
{
// This is a bit lazy, we find the pointer here, but we refind it when we erase the edge based
// on id key.
assert(edges_.contains(edge_id));
const Edge& edge = *edges_.find(edge_id);
// update neighbor count
assert(edges_from_node_.contains(edge.from));
int& edge_count = *edges_from_node_.find(edge.from);
assert(edge_count > 0);
edge_count -= 1;
// update neighbor list
{
assert(node_neighbors_.contains(edge.from));
auto neighbors = node_neighbors_.find(edge.from);
auto iter = std::find(neighbors->begin(), neighbors->end(), edge.to);
assert(iter != neighbors->end());
neighbors->erase(iter);
}
edges_.erase(edge_id);
}
template<typename NodeType, typename Visitor>
void dfs_traverse(const Graph<NodeType>& graph, const int start_node, Visitor visitor)
{
std::stack<int> stack;
stack.push(start_node);
while (!stack.empty())
{
const int current_node = stack.top();
stack.pop();
visitor(current_node);
for (const int neighbor : graph.neighbors(current_node))
{
stack.push(neighbor);
}
}
}
} // namespace example

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#include "node_editor.h"
#include <imnodes.h>
#include <imgui.h>
namespace example
{
namespace
{
class HelloWorldNodeEditor
{
public:
void show()
{
ImGui::Begin("simple node editor");
ImNodes::BeginNodeEditor();
ImNodes::BeginNode(1);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("simple node :)");
ImNodes::EndNodeTitleBar();
ImNodes::BeginInputAttribute(2);
ImGui::Text("input");
ImNodes::EndInputAttribute();
ImNodes::BeginOutputAttribute(3);
ImGui::Indent(40);
ImGui::Text("output");
ImNodes::EndOutputAttribute();
ImNodes::EndNode();
ImNodes::EndNodeEditor();
ImGui::End();
}
};
static HelloWorldNodeEditor editor;
} // namespace
void NodeEditorInitialize() { ImNodes::SetNodeGridSpacePos(1, ImVec2(200.0f, 200.0f)); }
void NodeEditorShow() { editor.show(); }
void NodeEditorShutdown() {}
} // namespace example

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#include "node_editor.h"
#include <imgui.h>
#include <imgui_impl_sdl.h>
#include <imgui_impl_opengl3.h>
#include <imnodes.h>
#include <stdio.h>
#include <SDL.h>
#include <GL/gl3w.h>
int main(int, char**)
{
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0)
{
printf("Error: %s\n", SDL_GetError());
return -1;
}
#if __APPLE__
// GL 3.2 Core + GLSL 150
const char* glsl_version = "#version 150";
SDL_GL_SetAttribute(
SDL_GL_CONTEXT_FLAGS,
SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG); // Always required on Mac
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
#else
// GL 3.0 + GLSL 130
const char* glsl_version = "#version 130";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#endif
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
SDL_DisplayMode current;
SDL_GetCurrentDisplayMode(0, &current);
SDL_Window* window = SDL_CreateWindow(
"imgui-node-editor example",
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED,
1280,
720,
SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
SDL_GLContext gl_context = SDL_GL_CreateContext(window);
SDL_GL_MakeCurrent(window, gl_context);
SDL_GL_SetSwapInterval(1); // Enable vsync
if (gl3wInit())
{
fprintf(stderr, "Failed to initialize OpenGL loader!\n");
return 1;
}
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGui_ImplSDL2_InitForOpenGL(window, gl_context);
ImGui_ImplOpenGL3_Init(glsl_version);
ImNodes::CreateContext();
// Setup style
ImGui::StyleColorsDark();
ImNodes::StyleColorsDark();
bool done = false;
bool initialized = false;
{
const ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
}
while (!done)
{
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
done = true;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE &&
event.window.windowID == SDL_GetWindowID(window))
done = true;
}
// Start the Dear ImGui frame
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplSDL2_NewFrame();
ImGui::NewFrame();
if (!initialized)
{
initialized = true;
example::NodeEditorInitialize();
}
example::NodeEditorShow();
// Rendering
ImGui::Render();
int fb_width, fb_height;
SDL_GL_GetDrawableSize(window, &fb_width, &fb_height);
glViewport(0, 0, fb_width, fb_height);
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
SDL_GL_SwapWindow(window);
}
example::NodeEditorShutdown();
ImNodes::DestroyContext();
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}

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#include "node_editor.h"
#include <imnodes.h>
#include <imgui.h>
#include <SDL_scancode.h>
#include <algorithm>
#include <vector>
namespace example
{
namespace
{
struct Node
{
int id;
float value;
Node(const int i, const float v) : id(i), value(v) {}
};
struct Link
{
int id;
int start_attr, end_attr;
};
struct Editor
{
ImNodesEditorContext* context = nullptr;
std::vector<Node> nodes;
std::vector<Link> links;
int current_id = 0;
};
void show_editor(const char* editor_name, Editor& editor)
{
ImNodes::EditorContextSet(editor.context);
ImGui::Begin(editor_name);
ImGui::TextUnformatted("A -- add node");
ImNodes::BeginNodeEditor();
if (ImGui::IsWindowFocused(ImGuiFocusedFlags_RootAndChildWindows) &&
ImNodes::IsEditorHovered() && ImGui::IsKeyReleased(SDL_SCANCODE_A))
{
const int node_id = ++editor.current_id;
ImNodes::SetNodeScreenSpacePos(node_id, ImGui::GetMousePos());
editor.nodes.push_back(Node(node_id, 0.f));
}
for (Node& node : editor.nodes)
{
ImNodes::BeginNode(node.id);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("node");
ImNodes::EndNodeTitleBar();
ImNodes::BeginInputAttribute(node.id << 8);
ImGui::TextUnformatted("input");
ImNodes::EndInputAttribute();
ImNodes::BeginStaticAttribute(node.id << 16);
ImGui::PushItemWidth(120.0f);
ImGui::DragFloat("value", &node.value, 0.01f);
ImGui::PopItemWidth();
ImNodes::EndStaticAttribute();
ImNodes::BeginOutputAttribute(node.id << 24);
const float text_width = ImGui::CalcTextSize("output").x;
ImGui::Indent(120.f + ImGui::CalcTextSize("value").x - text_width);
ImGui::TextUnformatted("output");
ImNodes::EndOutputAttribute();
ImNodes::EndNode();
}
for (const Link& link : editor.links)
{
ImNodes::Link(link.id, link.start_attr, link.end_attr);
}
ImNodes::EndNodeEditor();
{
Link link;
if (ImNodes::IsLinkCreated(&link.start_attr, &link.end_attr))
{
link.id = ++editor.current_id;
editor.links.push_back(link);
}
}
{
int link_id;
if (ImNodes::IsLinkDestroyed(&link_id))
{
auto iter = std::find_if(
editor.links.begin(), editor.links.end(), [link_id](const Link& link) -> bool {
return link.id == link_id;
});
assert(iter != editor.links.end());
editor.links.erase(iter);
}
}
ImGui::End();
}
Editor editor1;
Editor editor2;
} // namespace
void NodeEditorInitialize()
{
editor1.context = ImNodes::EditorContextCreate();
editor2.context = ImNodes::EditorContextCreate();
ImNodes::PushAttributeFlag(ImNodesAttributeFlags_EnableLinkDetachWithDragClick);
ImNodesIO& io = ImNodes::GetIO();
io.LinkDetachWithModifierClick.Modifier = &ImGui::GetIO().KeyCtrl;
}
void NodeEditorShow()
{
show_editor("editor1", editor1);
show_editor("editor2", editor2);
}
void NodeEditorShutdown()
{
ImNodes::PopAttributeFlag();
ImNodes::EditorContextFree(editor1.context);
ImNodes::EditorContextFree(editor2.context);
}
} // namespace example

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#pragma once
namespace example
{
void NodeEditorInitialize();
void NodeEditorShow();
void NodeEditorShutdown();
} // namespace example

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#include "node_editor.h"
#include <imnodes.h>
#include <imgui.h>
#include <SDL_keycode.h>
#include <algorithm>
#include <cassert>
#include <fstream>
#include <ios> // for std::streamsize
#include <stddef.h>
#include <vector>
namespace example
{
namespace
{
struct Node
{
int id;
float value;
Node() = default;
Node(const int i, const float v) : id(i), value(v) {}
};
struct Link
{
int id;
int start_attr, end_attr;
};
class SaveLoadEditor
{
public:
SaveLoadEditor() : nodes_(), links_(), current_id_(0) {}
void show()
{
ImGui::Begin("Save & load example");
ImGui::TextUnformatted("A -- add node");
ImGui::TextUnformatted(
"Close the executable and rerun it -- your nodes should be exactly "
"where you left them!");
ImNodes::BeginNodeEditor();
if (ImGui::IsWindowFocused(ImGuiFocusedFlags_RootAndChildWindows) &&
ImNodes::IsEditorHovered() && ImGui::IsKeyReleased(SDL_SCANCODE_A))
{
const int node_id = ++current_id_;
ImNodes::SetNodeScreenSpacePos(node_id, ImGui::GetMousePos());
nodes_.push_back(Node(node_id, 0.f));
}
for (Node& node : nodes_)
{
ImNodes::BeginNode(node.id);
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted("node");
ImNodes::EndNodeTitleBar();
ImNodes::BeginInputAttribute(node.id << 8);
ImGui::TextUnformatted("input");
ImNodes::EndInputAttribute();
ImNodes::BeginStaticAttribute(node.id << 16);
ImGui::PushItemWidth(120.f);
ImGui::DragFloat("value", &node.value, 0.01f);
ImGui::PopItemWidth();
ImNodes::EndStaticAttribute();
ImNodes::BeginOutputAttribute(node.id << 24);
const float text_width = ImGui::CalcTextSize("output").x;
ImGui::Indent(120.f + ImGui::CalcTextSize("value").x - text_width);
ImGui::TextUnformatted("output");
ImNodes::EndOutputAttribute();
ImNodes::EndNode();
}
for (const Link& link : links_)
{
ImNodes::Link(link.id, link.start_attr, link.end_attr);
}
ImNodes::EndNodeEditor();
{
Link link;
if (ImNodes::IsLinkCreated(&link.start_attr, &link.end_attr))
{
link.id = ++current_id_;
links_.push_back(link);
}
}
{
int link_id;
if (ImNodes::IsLinkDestroyed(&link_id))
{
auto iter =
std::find_if(links_.begin(), links_.end(), [link_id](const Link& link) -> bool {
return link.id == link_id;
});
assert(iter != links_.end());
links_.erase(iter);
}
}
ImGui::End();
}
void save()
{
// Save the internal imnodes state
ImNodes::SaveCurrentEditorStateToIniFile("save_load.ini");
// Dump our editor state as bytes into a file
std::fstream fout(
"save_load.bytes", std::ios_base::out | std::ios_base::binary | std::ios_base::trunc);
// copy the node vector to file
const size_t num_nodes = nodes_.size();
fout.write(
reinterpret_cast<const char*>(&num_nodes),
static_cast<std::streamsize>(sizeof(size_t)));
fout.write(
reinterpret_cast<const char*>(nodes_.data()),
static_cast<std::streamsize>(sizeof(Node) * num_nodes));
// copy the link vector to file
const size_t num_links = links_.size();
fout.write(
reinterpret_cast<const char*>(&num_links),
static_cast<std::streamsize>(sizeof(size_t)));
fout.write(
reinterpret_cast<const char*>(links_.data()),
static_cast<std::streamsize>(sizeof(Link) * num_links));
// copy the current_id to file
fout.write(
reinterpret_cast<const char*>(&current_id_), static_cast<std::streamsize>(sizeof(int)));
}
void load()
{
// Load the internal imnodes state
ImNodes::LoadCurrentEditorStateFromIniFile("save_load.ini");
// Load our editor state into memory
std::fstream fin("save_load.bytes", std::ios_base::in | std::ios_base::binary);
if (!fin.is_open())
{
return;
}
// copy nodes into memory
size_t num_nodes;
fin.read(reinterpret_cast<char*>(&num_nodes), static_cast<std::streamsize>(sizeof(size_t)));
nodes_.resize(num_nodes);
fin.read(
reinterpret_cast<char*>(nodes_.data()),
static_cast<std::streamsize>(sizeof(Node) * num_nodes));
// copy links into memory
size_t num_links;
fin.read(reinterpret_cast<char*>(&num_links), static_cast<std::streamsize>(sizeof(size_t)));
links_.resize(num_links);
fin.read(
reinterpret_cast<char*>(links_.data()),
static_cast<std::streamsize>(sizeof(Link) * num_links));
// copy current_id into memory
fin.read(reinterpret_cast<char*>(&current_id_), static_cast<std::streamsize>(sizeof(int)));
}
private:
std::vector<Node> nodes_;
std::vector<Link> links_;
int current_id_;
};
static SaveLoadEditor editor;
} // namespace
void NodeEditorInitialize()
{
ImNodes::GetIO().LinkDetachWithModifierClick.Modifier = &ImGui::GetIO().KeyCtrl;
ImNodes::PushAttributeFlag(ImNodesAttributeFlags_EnableLinkDetachWithDragClick);
editor.load();
}
void NodeEditorShow() { editor.show(); }
void NodeEditorShutdown()
{
ImNodes::PopAttributeFlag();
editor.save();
}
} // namespace example

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#pragma once
#include <stddef.h>
#include <imgui.h>
#ifdef IMNODES_USER_CONFIG
#include IMNODES_USER_CONFIG
#endif
#ifndef IMNODES_NAMESPACE
#define IMNODES_NAMESPACE ImNodes
#endif
typedef int ImNodesCol; // -> enum ImNodesCol_
typedef int ImNodesStyleVar; // -> enum ImNodesStyleVar_
typedef int ImNodesStyleFlags; // -> enum ImNodesStyleFlags_
typedef int ImNodesPinShape; // -> enum ImNodesPinShape_
typedef int ImNodesAttributeFlags; // -> enum ImNodesAttributeFlags_
typedef int ImNodesMiniMapLocation; // -> enum ImNodesMiniMapLocation_
enum ImNodesCol_
{
ImNodesCol_NodeBackground = 0,
ImNodesCol_NodeBackgroundHovered,
ImNodesCol_NodeBackgroundSelected,
ImNodesCol_NodeOutline,
ImNodesCol_TitleBar,
ImNodesCol_TitleBarHovered,
ImNodesCol_TitleBarSelected,
ImNodesCol_Link,
ImNodesCol_LinkHovered,
ImNodesCol_LinkSelected,
ImNodesCol_Pin,
ImNodesCol_PinHovered,
ImNodesCol_BoxSelector,
ImNodesCol_BoxSelectorOutline,
ImNodesCol_GridBackground,
ImNodesCol_GridLine,
ImNodesCol_MiniMapBackground,
ImNodesCol_MiniMapBackgroundHovered,
ImNodesCol_MiniMapOutline,
ImNodesCol_MiniMapOutlineHovered,
ImNodesCol_MiniMapNodeBackground,
ImNodesCol_MiniMapNodeBackgroundHovered,
ImNodesCol_MiniMapNodeBackgroundSelected,
ImNodesCol_MiniMapNodeOutline,
ImNodesCol_MiniMapLink,
ImNodesCol_MiniMapLinkSelected,
ImNodesCol_MiniMapCanvas,
ImNodesCol_MiniMapCanvasOutline,
ImNodesCol_COUNT
};
enum ImNodesStyleVar_
{
ImNodesStyleVar_GridSpacing = 0,
ImNodesStyleVar_NodeCornerRounding,
ImNodesStyleVar_NodePadding,
ImNodesStyleVar_NodeBorderThickness,
ImNodesStyleVar_LinkThickness,
ImNodesStyleVar_LinkLineSegmentsPerLength,
ImNodesStyleVar_LinkHoverDistance,
ImNodesStyleVar_PinCircleRadius,
ImNodesStyleVar_PinQuadSideLength,
ImNodesStyleVar_PinTriangleSideLength,
ImNodesStyleVar_PinLineThickness,
ImNodesStyleVar_PinHoverRadius,
ImNodesStyleVar_PinOffset,
ImNodesStyleVar_MiniMapPadding,
ImNodesStyleVar_MiniMapOffset,
ImNodesStyleVar_COUNT
};
enum ImNodesStyleFlags_
{
ImNodesStyleFlags_None = 0,
ImNodesStyleFlags_NodeOutline = 1 << 0,
ImNodesStyleFlags_GridLines = 1 << 2
};
enum ImNodesPinShape_
{
ImNodesPinShape_Circle,
ImNodesPinShape_CircleFilled,
ImNodesPinShape_Triangle,
ImNodesPinShape_TriangleFilled,
ImNodesPinShape_Quad,
ImNodesPinShape_QuadFilled
};
// This enum controls the way the attribute pins behave.
enum ImNodesAttributeFlags_
{
ImNodesAttributeFlags_None = 0,
// Allow detaching a link by left-clicking and dragging the link at a pin it is connected to.
// NOTE: the user has to actually delete the link for this to work. A deleted link can be
// detected by calling IsLinkDestroyed() after EndNodeEditor().
ImNodesAttributeFlags_EnableLinkDetachWithDragClick = 1 << 0,
// Visual snapping of an in progress link will trigger IsLink Created/Destroyed events. Allows
// for previewing the creation of a link while dragging it across attributes. See here for demo:
// https://github.com/Nelarius/imnodes/issues/41#issuecomment-647132113 NOTE: the user has to
// actually delete the link for this to work. A deleted link can be detected by calling
// IsLinkDestroyed() after EndNodeEditor().
ImNodesAttributeFlags_EnableLinkCreationOnSnap = 1 << 1
};
struct ImNodesIO
{
struct EmulateThreeButtonMouse
{
EmulateThreeButtonMouse();
// The keyboard modifier to use in combination with mouse left click to pan the editor view.
// Set to NULL by default. To enable this feature, set the modifier to point to a boolean
// indicating the state of a modifier. For example,
//
// ImNodes::GetIO().EmulateThreeButtonMouse.Modifier = &ImGui::GetIO().KeyAlt;
const bool* Modifier;
} EmulateThreeButtonMouse;
struct LinkDetachWithModifierClick
{
LinkDetachWithModifierClick();
// Pointer to a boolean value indicating when the desired modifier is pressed. Set to NULL
// by default. To enable the feature, set the modifier to point to a boolean indicating the
// state of a modifier. For example,
//
// ImNodes::GetIO().LinkDetachWithModifierClick.Modifier = &ImGui::GetIO().KeyCtrl;
//
// Left-clicking a link with this modifier pressed will detach that link. NOTE: the user has
// to actually delete the link for this to work. A deleted link can be detected by calling
// IsLinkDestroyed() after EndNodeEditor().
const bool* Modifier;
} LinkDetachWithModifierClick;
// Holding alt mouse button pans the node area, by default middle mouse button will be used
// Set based on ImGuiMouseButton values
int AltMouseButton;
// Panning speed when dragging an element and mouse is outside the main editor view.
float AutoPanningSpeed;
ImNodesIO();
};
struct ImNodesStyle
{
float GridSpacing;
float NodeCornerRounding;
ImVec2 NodePadding;
float NodeBorderThickness;
float LinkThickness;
float LinkLineSegmentsPerLength;
float LinkHoverDistance;
// The following variables control the look and behavior of the pins. The default size of each
// pin shape is balanced to occupy approximately the same surface area on the screen.
// The circle radius used when the pin shape is either ImNodesPinShape_Circle or
// ImNodesPinShape_CircleFilled.
float PinCircleRadius;
// The quad side length used when the shape is either ImNodesPinShape_Quad or
// ImNodesPinShape_QuadFilled.
float PinQuadSideLength;
// The equilateral triangle side length used when the pin shape is either
// ImNodesPinShape_Triangle or ImNodesPinShape_TriangleFilled.
float PinTriangleSideLength;
// The thickness of the line used when the pin shape is not filled.
float PinLineThickness;
// The radius from the pin's center position inside of which it is detected as being hovered
// over.
float PinHoverRadius;
// Offsets the pins' positions from the edge of the node to the outside of the node.
float PinOffset;
// Mini-map padding size between mini-map edge and mini-map content.
ImVec2 MiniMapPadding;
// Mini-map offset from the screen side.
ImVec2 MiniMapOffset;
// By default, ImNodesStyleFlags_NodeOutline and ImNodesStyleFlags_Gridlines are enabled.
ImNodesStyleFlags Flags;
// Set these mid-frame using Push/PopColorStyle. You can index this color array with with a
// ImNodesCol value.
unsigned int Colors[ImNodesCol_COUNT];
ImNodesStyle();
};
enum ImNodesMiniMapLocation_
{
ImNodesMiniMapLocation_BottomLeft,
ImNodesMiniMapLocation_BottomRight,
ImNodesMiniMapLocation_TopLeft,
ImNodesMiniMapLocation_TopRight,
};
struct ImGuiContext;
struct ImVec2;
struct ImNodesContext;
// An editor context corresponds to a set of nodes in a single workspace (created with a single
// Begin/EndNodeEditor pair)
//
// By default, the library creates an editor context behind the scenes, so using any of the imnodes
// functions doesn't require you to explicitly create a context.
struct ImNodesEditorContext;
// Callback type used to specify special behavior when hovering a node in the minimap
#ifndef ImNodesMiniMapNodeHoveringCallback
typedef void (*ImNodesMiniMapNodeHoveringCallback)(int, void*);
#endif
#ifndef ImNodesMiniMapNodeHoveringCallbackUserData
typedef void* ImNodesMiniMapNodeHoveringCallbackUserData;
#endif
namespace IMNODES_NAMESPACE
{
// Call this function if you are compiling imnodes in to a dll, separate from ImGui. Calling this
// function sets the GImGui global variable, which is not shared across dll boundaries.
void SetImGuiContext(ImGuiContext* ctx);
ImNodesContext* CreateContext();
void DestroyContext(ImNodesContext* ctx = NULL); // NULL = destroy current context
ImNodesContext* GetCurrentContext();
void SetCurrentContext(ImNodesContext* ctx);
ImNodesEditorContext* EditorContextCreate();
void EditorContextFree(ImNodesEditorContext*);
void EditorContextSet(ImNodesEditorContext*);
ImVec2 EditorContextGetPanning();
void EditorContextResetPanning(const ImVec2& pos);
void EditorContextMoveToNode(const int node_id);
ImNodesIO& GetIO();
// Returns the global style struct. See the struct declaration for default values.
ImNodesStyle& GetStyle();
// Style presets matching the dear imgui styles of the same name.
void StyleColorsDark(); // on by default
void StyleColorsClassic();
void StyleColorsLight();
// The top-level function call. Call this before calling BeginNode/EndNode. Calling this function
// will result the node editor grid workspace being rendered.
void BeginNodeEditor();
void EndNodeEditor();
// Add a navigable minimap to the editor; call before EndNodeEditor after all
// nodes and links have been specified
void MiniMap(
const float minimap_size_fraction = 0.2f,
const ImNodesMiniMapLocation location = ImNodesMiniMapLocation_TopLeft,
const ImNodesMiniMapNodeHoveringCallback node_hovering_callback = NULL,
const ImNodesMiniMapNodeHoveringCallbackUserData node_hovering_callback_data = NULL);
// Use PushColorStyle and PopColorStyle to modify ImNodesStyle::Colors mid-frame.
void PushColorStyle(ImNodesCol item, unsigned int color);
void PopColorStyle();
void PushStyleVar(ImNodesStyleVar style_item, float value);
void PushStyleVar(ImNodesStyleVar style_item, const ImVec2& value);
void PopStyleVar(int count = 1);
// id can be any positive or negative integer, but INT_MIN is currently reserved for internal use.
void BeginNode(int id);
void EndNode();
ImVec2 GetNodeDimensions(int id);
// Place your node title bar content (such as the node title, using ImGui::Text) between the
// following function calls. These functions have to be called before adding any attributes, or the
// layout of the node will be incorrect.
void BeginNodeTitleBar();
void EndNodeTitleBar();
// Attributes are ImGui UI elements embedded within the node. Attributes can have pin shapes
// rendered next to them. Links are created between pins.
//
// The activity status of an attribute can be checked via the IsAttributeActive() and
// IsAnyAttributeActive() function calls. This is one easy way of checking for any changes made to
// an attribute's drag float UI, for instance.
//
// Each attribute id must be unique.
// Create an input attribute block. The pin is rendered on left side.
void BeginInputAttribute(int id, ImNodesPinShape shape = ImNodesPinShape_CircleFilled);
void EndInputAttribute();
// Create an output attribute block. The pin is rendered on the right side.
void BeginOutputAttribute(int id, ImNodesPinShape shape = ImNodesPinShape_CircleFilled);
void EndOutputAttribute();
// Create a static attribute block. A static attribute has no pin, and therefore can't be linked to
// anything. However, you can still use IsAttributeActive() and IsAnyAttributeActive() to check for
// attribute activity.
void BeginStaticAttribute(int id);
void EndStaticAttribute();
// Push a single AttributeFlags value. By default, only AttributeFlags_None is set.
void PushAttributeFlag(ImNodesAttributeFlags flag);
void PopAttributeFlag();
// Render a link between attributes.
// The attributes ids used here must match the ids used in Begin(Input|Output)Attribute function
// calls. The order of start_attr and end_attr doesn't make a difference for rendering the link.
void Link(int id, int start_attribute_id, int end_attribute_id);
// Enable or disable the ability to click and drag a specific node.
void SetNodeDraggable(int node_id, const bool draggable);
// The node's position can be expressed in three coordinate systems:
// * screen space coordinates, -- the origin is the upper left corner of the window.
// * editor space coordinates -- the origin is the upper left corner of the node editor window
// * grid space coordinates, -- the origin is the upper left corner of the node editor window,
// translated by the current editor panning vector (see EditorContextGetPanning() and
// EditorContextResetPanning())
// Use the following functions to get and set the node's coordinates in these coordinate systems.
void SetNodeScreenSpacePos(int node_id, const ImVec2& screen_space_pos);
void SetNodeEditorSpacePos(int node_id, const ImVec2& editor_space_pos);
void SetNodeGridSpacePos(int node_id, const ImVec2& grid_pos);
ImVec2 GetNodeScreenSpacePos(const int node_id);
ImVec2 GetNodeEditorSpacePos(const int node_id);
ImVec2 GetNodeGridSpacePos(const int node_id);
// Returns true if the current node editor canvas is being hovered over by the mouse, and is not
// blocked by any other windows.
bool IsEditorHovered();
// The following functions return true if a UI element is being hovered over by the mouse cursor.
// Assigns the id of the UI element being hovered over to the function argument. Use these functions
// after EndNodeEditor() has been called.
bool IsNodeHovered(int* node_id);
bool IsLinkHovered(int* link_id);
bool IsPinHovered(int* attribute_id);
// Use The following two functions to query the number of selected nodes or links in the current
// editor. Use after calling EndNodeEditor().
int NumSelectedNodes();
int NumSelectedLinks();
// Get the selected node/link ids. The pointer argument should point to an integer array with at
// least as many elements as the respective NumSelectedNodes/NumSelectedLinks function call
// returned.
void GetSelectedNodes(int* node_ids);
void GetSelectedLinks(int* link_ids);
// Clears the list of selected nodes/links. Useful if you want to delete a selected node or link.
void ClearNodeSelection();
void ClearLinkSelection();
// Use the following functions to add or remove individual nodes or links from the current editors
// selection. Note that all functions require the id to be an existing valid id for this editor.
// Select-functions has the precondition that the object is currently considered unselected.
// Clear-functions has the precondition that the object is currently considered selected.
// Preconditions listed above can be checked via IsNodeSelected/IsLinkSelected if not already
// known.
void SelectNode(int node_id);
void ClearNodeSelection(int node_id);
bool IsNodeSelected(int node_id);
void SelectLink(int link_id);
void ClearLinkSelection(int link_id);
bool IsLinkSelected(int link_id);
// Was the previous attribute active? This will continuously return true while the left mouse button
// is being pressed over the UI content of the attribute.
bool IsAttributeActive();
// Was any attribute active? If so, sets the active attribute id to the output function argument.
bool IsAnyAttributeActive(int* attribute_id = NULL);
// Use the following functions to query a change of state for an existing link, or new link. Call
// these after EndNodeEditor().
// Did the user start dragging a new link from a pin?
bool IsLinkStarted(int* started_at_attribute_id);
// Did the user drop the dragged link before attaching it to a pin?
// There are two different kinds of situations to consider when handling this event:
// 1) a link which is created at a pin and then dropped
// 2) an existing link which is detached from a pin and then dropped
// Use the including_detached_links flag to control whether this function triggers when the user
// detaches a link and drops it.
bool IsLinkDropped(int* started_at_attribute_id = NULL, bool including_detached_links = true);
// Did the user finish creating a new link?
bool IsLinkCreated(
int* started_at_attribute_id,
int* ended_at_attribute_id,
bool* created_from_snap = NULL);
bool IsLinkCreated(
int* started_at_node_id,
int* started_at_attribute_id,
int* ended_at_node_id,
int* ended_at_attribute_id,
bool* created_from_snap = NULL);
// Was an existing link detached from a pin by the user? The detached link's id is assigned to the
// output argument link_id.
bool IsLinkDestroyed(int* link_id);
// Use the following functions to write the editor context's state to a string, or directly to a
// file. The editor context is serialized in the INI file format.
const char* SaveCurrentEditorStateToIniString(size_t* data_size = NULL);
const char* SaveEditorStateToIniString(
const ImNodesEditorContext* editor,
size_t* data_size = NULL);
void LoadCurrentEditorStateFromIniString(const char* data, size_t data_size);
void LoadEditorStateFromIniString(ImNodesEditorContext* editor, const char* data, size_t data_size);
void SaveCurrentEditorStateToIniFile(const char* file_name);
void SaveEditorStateToIniFile(const ImNodesEditorContext* editor, const char* file_name);
void LoadCurrentEditorStateFromIniFile(const char* file_name);
void LoadEditorStateFromIniFile(ImNodesEditorContext* editor, const char* file_name);
} // namespace IMNODES_NAMESPACE

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#pragma once
#include "imnodes.h"
#include <imgui.h>
#define IMGUI_DEFINE_MATH_OPERATORS
#include <imgui_internal.h>
#include <assert.h>
#include <limits.h>
// the structure of this file:
//
// [SECTION] internal enums
// [SECTION] internal data structures
// [SECTION] global and editor context structs
// [SECTION] object pool implementation
struct ImNodesContext;
extern ImNodesContext* GImNodes;
// [SECTION] internal enums
typedef int ImNodesScope;
typedef int ImNodesAttributeType;
typedef int ImNodesUIState;
typedef int ImNodesClickInteractionType;
typedef int ImNodesLinkCreationType;
enum ImNodesScope_
{
ImNodesScope_None = 1,
ImNodesScope_Editor = 1 << 1,
ImNodesScope_Node = 1 << 2,
ImNodesScope_Attribute = 1 << 3
};
enum ImNodesAttributeType_
{
ImNodesAttributeType_None,
ImNodesAttributeType_Input,
ImNodesAttributeType_Output
};
enum ImNodesUIState_
{
ImNodesUIState_None = 0,
ImNodesUIState_LinkStarted = 1 << 0,
ImNodesUIState_LinkDropped = 1 << 1,
ImNodesUIState_LinkCreated = 1 << 2
};
enum ImNodesClickInteractionType_
{
ImNodesClickInteractionType_Node,
ImNodesClickInteractionType_Link,
ImNodesClickInteractionType_LinkCreation,
ImNodesClickInteractionType_Panning,
ImNodesClickInteractionType_BoxSelection,
ImNodesClickInteractionType_ImGuiItem,
ImNodesClickInteractionType_None
};
enum ImNodesLinkCreationType_
{
ImNodesLinkCreationType_Standard,
ImNodesLinkCreationType_FromDetach
};
// [SECTION] internal data structures
// The object T must have the following interface:
//
// struct T
// {
// T();
//
// int id;
// };
template<typename T>
struct ImObjectPool
{
ImVector<T> Pool;
ImVector<bool> InUse;
ImVector<int> FreeList;
ImGuiStorage IdMap;
ImObjectPool() : Pool(), InUse(), FreeList(), IdMap() {}
};
// Emulates std::optional<int> using the sentinel value `INVALID_INDEX`.
struct ImOptionalIndex
{
ImOptionalIndex() : _Index(INVALID_INDEX) {}
ImOptionalIndex(const int value) : _Index(value) {}
// Observers
inline bool HasValue() const { return _Index != INVALID_INDEX; }
inline int Value() const
{
assert(HasValue());
return _Index;
}
// Modifiers
inline ImOptionalIndex& operator=(const int value)
{
_Index = value;
return *this;
}
inline void Reset() { _Index = INVALID_INDEX; }
inline bool operator==(const ImOptionalIndex& rhs) const { return _Index == rhs._Index; }
inline bool operator==(const int rhs) const { return _Index == rhs; }
inline bool operator!=(const ImOptionalIndex& rhs) const { return _Index != rhs._Index; }
inline bool operator!=(const int rhs) const { return _Index != rhs; }
static const int INVALID_INDEX = -1;
private:
int _Index;
};
struct ImNodeData
{
int Id;
ImVec2 Origin; // The node origin is in editor space
ImRect TitleBarContentRect;
ImRect Rect;
struct
{
ImU32 Background, BackgroundHovered, BackgroundSelected, Outline, Titlebar, TitlebarHovered,
TitlebarSelected;
} ColorStyle;
struct
{
float CornerRounding;
ImVec2 Padding;
float BorderThickness;
} LayoutStyle;
ImVector<int> PinIndices;
bool Draggable;
ImNodeData(const int node_id)
: Id(node_id), Origin(100.0f, 100.0f), TitleBarContentRect(),
Rect(ImVec2(0.0f, 0.0f), ImVec2(0.0f, 0.0f)), ColorStyle(), LayoutStyle(), PinIndices(),
Draggable(true)
{
}
~ImNodeData() { Id = INT_MIN; }
};
struct ImPinData
{
int Id;
int ParentNodeIdx;
ImRect AttributeRect;
ImNodesAttributeType Type;
ImNodesPinShape Shape;
ImVec2 Pos; // screen-space coordinates
int Flags;
struct
{
ImU32 Background, Hovered;
} ColorStyle;
ImPinData(const int pin_id)
: Id(pin_id), ParentNodeIdx(), AttributeRect(), Type(ImNodesAttributeType_None),
Shape(ImNodesPinShape_CircleFilled), Pos(), Flags(ImNodesAttributeFlags_None),
ColorStyle()
{
}
};
struct ImLinkData
{
int Id;
int StartPinIdx, EndPinIdx;
struct
{
ImU32 Base, Hovered, Selected;
} ColorStyle;
ImLinkData(const int link_id) : Id(link_id), StartPinIdx(), EndPinIdx(), ColorStyle() {}
};
struct ImClickInteractionState
{
ImNodesClickInteractionType Type;
struct
{
int StartPinIdx;
ImOptionalIndex EndPinIdx;
ImNodesLinkCreationType Type;
} LinkCreation;
struct
{
ImRect Rect; // Coordinates in grid space
} BoxSelector;
ImClickInteractionState() : Type(ImNodesClickInteractionType_None) {}
};
struct ImNodesColElement
{
ImU32 Color;
ImNodesCol Item;
ImNodesColElement(const ImU32 c, const ImNodesCol s) : Color(c), Item(s) {}
};
struct ImNodesStyleVarElement
{
ImNodesStyleVar Item;
float FloatValue[2];
ImNodesStyleVarElement(const ImNodesStyleVar variable, const float value) : Item(variable)
{
FloatValue[0] = value;
}
ImNodesStyleVarElement(const ImNodesStyleVar variable, const ImVec2 value) : Item(variable)
{
FloatValue[0] = value.x;
FloatValue[1] = value.y;
}
};
// [SECTION] global and editor context structs
struct ImNodesEditorContext
{
ImObjectPool<ImNodeData> Nodes;
ImObjectPool<ImPinData> Pins;
ImObjectPool<ImLinkData> Links;
ImVector<int> NodeDepthOrder;
// ui related fields
ImVec2 Panning;
ImVec2 AutoPanningDelta;
// Minimum and maximum extents of all content in grid space. Valid after final
// ImNodes::EndNode() call.
ImRect GridContentBounds;
ImVector<int> SelectedNodeIndices;
ImVector<int> SelectedLinkIndices;
ImClickInteractionState ClickInteraction;
// Mini-map state set by MiniMap()
bool MiniMapEnabled;
ImNodesMiniMapLocation MiniMapLocation;
float MiniMapSizeFraction;
ImNodesMiniMapNodeHoveringCallback MiniMapNodeHoveringCallback;
ImNodesMiniMapNodeHoveringCallbackUserData MiniMapNodeHoveringCallbackUserData;
// Mini-map state set during EndNodeEditor() call
ImRect MiniMapRectScreenSpace;
ImRect MiniMapContentScreenSpace;
float MiniMapScaling;
ImNodesEditorContext()
: Nodes(), Pins(), Links(), Panning(0.f, 0.f), SelectedNodeIndices(), SelectedLinkIndices(),
ClickInteraction(), MiniMapEnabled(false), MiniMapSizeFraction(0.0f),
MiniMapNodeHoveringCallback(NULL), MiniMapNodeHoveringCallbackUserData(NULL),
MiniMapScaling(0.0f)
{
}
};
struct ImNodesContext
{
ImNodesEditorContext* DefaultEditorCtx;
ImNodesEditorContext* EditorCtx;
// Canvas draw list and helper state
ImDrawList* CanvasDrawList;
ImGuiStorage NodeIdxToSubmissionIdx;
ImVector<int> NodeIdxSubmissionOrder;
ImVector<int> NodeIndicesOverlappingWithMouse;
ImVector<int> OccludedPinIndices;
// Canvas extents
ImVec2 CanvasOriginScreenSpace;
ImRect CanvasRectScreenSpace;
// Debug helpers
ImNodesScope CurrentScope;
// Configuration state
ImNodesIO Io;
ImNodesStyle Style;
ImVector<ImNodesColElement> ColorModifierStack;
ImVector<ImNodesStyleVarElement> StyleModifierStack;
ImGuiTextBuffer TextBuffer;
int CurrentAttributeFlags;
ImVector<int> AttributeFlagStack;
// UI element state
int CurrentNodeIdx;
int CurrentPinIdx;
int CurrentAttributeId;
ImOptionalIndex HoveredNodeIdx;
ImOptionalIndex HoveredLinkIdx;
ImOptionalIndex HoveredPinIdx;
ImOptionalIndex DeletedLinkIdx;
ImOptionalIndex SnapLinkIdx;
// Event helper state
// TODO: this should be a part of a state machine, and not a member of the global struct.
// Unclear what parts of the code this relates to.
int ImNodesUIState;
int ActiveAttributeId;
bool ActiveAttribute;
// ImGui::IO cache
ImVec2 MousePos;
bool LeftMouseClicked;
bool LeftMouseReleased;
bool AltMouseClicked;
bool LeftMouseDragging;
bool AltMouseDragging;
float AltMouseScrollDelta;
};
namespace IMNODES_NAMESPACE
{
static inline ImNodesEditorContext& EditorContextGet()
{
// No editor context was set! Did you forget to call ImNodes::CreateContext()?
assert(GImNodes->EditorCtx != NULL);
return *GImNodes->EditorCtx;
}
// [SECTION] ObjectPool implementation
template<typename T>
static inline int ObjectPoolFind(const ImObjectPool<T>& objects, const int id)
{
const int index = objects.IdMap.GetInt(static_cast<ImGuiID>(id), -1);
return index;
}
template<typename T>
static inline void ObjectPoolUpdate(ImObjectPool<T>& objects)
{
for (int i = 0; i < objects.InUse.size(); ++i)
{
const int id = objects.Pool[i].Id;
if (!objects.InUse[i] && objects.IdMap.GetInt(id, -1) == i)
{
objects.IdMap.SetInt(id, -1);
objects.FreeList.push_back(i);
(objects.Pool.Data + i)->~T();
}
}
}
template<>
inline void ObjectPoolUpdate(ImObjectPool<ImNodeData>& nodes)
{
for (int i = 0; i < nodes.InUse.size(); ++i)
{
if (nodes.InUse[i])
{
nodes.Pool[i].PinIndices.clear();
}
else
{
const int id = nodes.Pool[i].Id;
if (nodes.IdMap.GetInt(id, -1) == i)
{
// Remove node idx form depth stack the first time we detect that this idx slot is
// unused
ImVector<int>& depth_stack = EditorContextGet().NodeDepthOrder;
const int* const elem = depth_stack.find(i);
assert(elem != depth_stack.end());
depth_stack.erase(elem);
nodes.IdMap.SetInt(id, -1);
nodes.FreeList.push_back(i);
(nodes.Pool.Data + i)->~ImNodeData();
}
}
}
}
template<typename T>
static inline void ObjectPoolReset(ImObjectPool<T>& objects)
{
if (!objects.InUse.empty())
{
memset(objects.InUse.Data, 0, objects.InUse.size_in_bytes());
}
}
template<typename T>
static inline int ObjectPoolFindOrCreateIndex(ImObjectPool<T>& objects, const int id)
{
int index = objects.IdMap.GetInt(static_cast<ImGuiID>(id), -1);
// Construct new object
if (index == -1)
{
if (objects.FreeList.empty())
{
index = objects.Pool.size();
IM_ASSERT(objects.Pool.size() == objects.InUse.size());
const int new_size = objects.Pool.size() + 1;
objects.Pool.resize(new_size);
objects.InUse.resize(new_size);
}
else
{
index = objects.FreeList.back();
objects.FreeList.pop_back();
}
IM_PLACEMENT_NEW(objects.Pool.Data + index) T(id);
objects.IdMap.SetInt(static_cast<ImGuiID>(id), index);
}
// Flag it as used
objects.InUse[index] = true;
return index;
}
template<>
inline int ObjectPoolFindOrCreateIndex(ImObjectPool<ImNodeData>& nodes, const int node_id)
{
int node_idx = nodes.IdMap.GetInt(static_cast<ImGuiID>(node_id), -1);
// Construct new node
if (node_idx == -1)
{
if (nodes.FreeList.empty())
{
node_idx = nodes.Pool.size();
IM_ASSERT(nodes.Pool.size() == nodes.InUse.size());
const int new_size = nodes.Pool.size() + 1;
nodes.Pool.resize(new_size);
nodes.InUse.resize(new_size);
}
else
{
node_idx = nodes.FreeList.back();
nodes.FreeList.pop_back();
}
IM_PLACEMENT_NEW(nodes.Pool.Data + node_idx) ImNodeData(node_id);
nodes.IdMap.SetInt(static_cast<ImGuiID>(node_id), node_idx);
ImNodesEditorContext& editor = EditorContextGet();
editor.NodeDepthOrder.push_back(node_idx);
}
// Flag node as used
nodes.InUse[node_idx] = true;
return node_idx;
}
template<typename T>
static inline T& ObjectPoolFindOrCreateObject(ImObjectPool<T>& objects, const int id)
{
const int index = ObjectPoolFindOrCreateIndex(objects, id);
return objects.Pool[index];
}
} // namespace IMNODES_NAMESPACE

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@ -0,0 +1,154 @@
newoption {
trigger = "sdl-include-path",
value = "path",
description = "The location of your SDL2 header files"
}
newoption {
trigger = "sdl-link-path",
value = "path",
description = "The location of your SDL2 link libraries"
}
newoption {
trigger = "use-sdl-framework",
description = "Use the installed SDL2 framework (on MacOS)"
}
local projectlocation = os.getcwd()
local gl3wlocation = path.join(os.getcwd(), "dependencies/gl3w")
local imguilocation = path.join(os.getcwd(), "dependencies/imgui-1.84.2")
if _ACTION then
projectlocation = path.join(projectlocation, "build", _ACTION)
end
function imnodes_example_project(name, example_file)
project(name)
location(projectlocation)
kind "ConsoleApp"
language "C++"
cppdialect "C++11"
targetdir "bin/%{cfg.buildcfg}"
debugdir "bin/%{cfg.buildcfg}"
files {"example/main.cpp", path.join("example", example_file) }
includedirs {
os.getcwd(),
imguilocation,
path.join(gl3wlocation, "include"),
}
links { "gl3w", "imgui", "imnodes" }
defines { "IMGUI_IMPL_OPENGL_LOADER_GL3W" }
if _OPTIONS["sdl-include-path"] then
includedirs { _OPTIONS["sdl-include-path"] }
end
if _OPTIONS["sdl-link-path"] then
libdirs { _OPTIONS["sdl-link-path"] }
filter "system:macosx"
links {
"iconv",
"AudioToolbox.framework",
"Carbon.framework",
"Cocoa.framework",
"CoreAudio.framework",
"CoreVideo.framework",
"ForceFeedback.framework",
"IOKit.framework"
}
filter "*"
end
if _OPTIONS["use-sdl-framework"] then
includedirs { "/Library/Frameworks/SDL2.framework/Headers" }
linkoptions { "-F/Library/Frameworks -framework SDL2 -framework CoreFoundation" }
else
links { "SDL2" }
end
filter "system:windows"
defines { "SDL_MAIN_HANDLED" }
links { "opengl32" }
if _OPTIONS["sdl-link-path"] then
postbuildcommands {
"{COPY} " ..
path.join(os.getcwd(), _OPTIONS["sdl-link-path"].."/../bin/", "SDL2.dll") ..
" %{cfg.targetdir}" }
end
filter "system:linux"
links { "dl" }
end
workspace "imnodes"
configurations { "Debug", "Release" }
architecture "x86_64"
defines { "IMGUI_DISABLE_OBSOLETE_FUNCTIONS" }
filter "configurations:Debug"
symbols "On"
filter "configurations:Release"
defines { "NDEBUG" }
optimize "On"
filter "action:vs*"
defines { "_CRT_SECURE_NO_WARNINGS" }
warnings "Extra"
startproject "colornode"
group "dependencies"
project "gl3w"
location(projectlocation)
kind "StaticLib"
language "C"
targetdir "lib/%{cfg.buildcfg}"
files { path.join(gl3wlocation, "src/gl3w.c") }
includedirs { path.join(gl3wlocation, "include") }
project "imgui"
location(projectlocation)
kind "StaticLib"
language "C++"
cppdialect "C++98"
targetdir "lib/%{cfg.buildcfg}"
files { path.join(imguilocation, "**.cpp") }
includedirs {
imguilocation,
path.join(gl3wlocation, "include") }
if _OPTIONS["sdl-include-path"] then
includedirs { _OPTIONS["sdl-include-path"] }
end
if _OPTIONS["use-sdl-framework"] then
includedirs { "/Library/Frameworks/SDL2.framework/Headers" }
end
group "imnodes"
project "imnodes"
location(projectlocation)
kind "StaticLib"
language "C++"
cppdialect "C++98"
enablewarnings { "all" }
targetdir "lib/%{cfg.buildcfg}"
files { "imnodes.h", "imnodes_internal.h", "imnodes.cpp" }
includedirs { path.join(imguilocation) }
group "examples"
imnodes_example_project("hello", "hello.cpp")
imnodes_example_project("saveload", "save_load.cpp")
imnodes_example_project("colornode", "color_node_editor.cpp")
imnodes_example_project("multieditor", "multi_editor.cpp")

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3rdparty/json/LICENSE.MIT vendored Normal file
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MIT License
Copyright (c) 2013-2022 Niels Lohmann
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

22109
3rdparty/json/json.hpp vendored Normal file
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22
CMakeLists.txt
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@ -23,20 +23,22 @@ set(ozz_build_gltf ON)
set(ozz_build_data OFF CACHE BOOL "")
set(ozz_build_samples OFF CACHE BOOL "")
set(ozz_build_howtos OFF CACHE BOOL "")
set(ozz_build_tests OFF CACHE BOOL "")
set(ozz_build_tests ON CACHE BOOL "")
set(ozz_build_simd_ref OFF CACHE BOOL "")
set(ozz_build_msvc_rt_dll OFF CACHE BOOL "")
add_subdirectory(3rdparty/ozz-animation)
set (ThirdPartyIncludeDeps
set(ThirdPartyIncludeDeps
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/glfw/deps>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/glfw/deps>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/Handmade-Math>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/imgui>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/imnodes>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/ozz-animation/include>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/sokol>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/vectorial/include>
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/>
)
# Shared code by main executable and tests
@ -57,7 +59,9 @@ add_library(AnimTestbedCode OBJECT
3rdparty/imgui/imgui.cpp
3rdparty/imgui/imgui_draw.cpp
3rdparty/imgui/imgui_widgets.cpp
)
3rdparty/imnodes/imnodes.cpp
src/AnimGraphResource.cc
src/AnimGraphResource.h src/AnimGraphEditor.cc src/AnimGraphEditor.h)
target_include_directories(
AnimTestbedCode
@ -66,6 +70,8 @@ target_include_directories(
${ThirdPartyIncludeDeps}
)
target_compile_features(AnimTestbedCode PRIVATE cxx_std_17)
# AnimTestbed Executable
add_executable(AnimTestbed)
target_include_directories(
@ -88,11 +94,19 @@ target_link_libraries(AnimTestbed AnimTestbedCode glfw ozz_base ozz_geometry ozz
# Tests
add_executable(runtests)
target_sources(runtests PRIVATE tests/main.cc tests/AnimSampleNodeTests.cc tests/SyncTrackTests.cc)
target_sources(runtests PRIVATE
tests/AnimGraphResourceTests.cc
tests/AnimSampleNodeTests.cc
tests/SyncTrackTests.cc
tests/main.cc
)
target_include_directories(
runtests
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
${ThirdPartyIncludeDeps}
)
target_compile_features(runtests PRIVATE cxx_std_17)
target_link_libraries(runtests AnimTestbedCode glfw ozz_base ozz_geometry ozz_animation)

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//
// Created by martin on 11.02.22.
//
#include "AnimGraphEditor.h"
#include "imnodes.h"
#include "AnimGraphResource.h"
static AnimGraphResource gGraphResource;
constexpr int NodeInputAttributeFlag = 2 << 16;
constexpr int NodeOutputAttributeFlag = 2 << 17;
void AnimGraphEditorUpdate() {
ImGui::BeginMenuBar();
if (ImGui::Button("Save")) {
gGraphResource.saveToFile("editor_graph.json");
}
if (ImGui::Button("Load")) {
gGraphResource.loadFromFile("editor_graph.json");
for (size_t i = 0, n = gGraphResource.m_nodes.size(); i < n; i++) {
const AnimNodeResource& node_resource = gGraphResource.m_nodes[i];
ImNodes::SetNodeGridSpacePos(i, ImVec2(node_resource.m_position[0], node_resource.m_position[1]));
}
}
if (ImGui::Button("Clear")) {
gGraphResource.clear();
}
char graph_name_buffer[256];
memset (graph_name_buffer, 0, sizeof(graph_name_buffer));
strncpy (graph_name_buffer, gGraphResource.m_name.c_str(), sizeof(graph_name_buffer));
if (ImGui::InputText("Name", graph_name_buffer, sizeof(graph_name_buffer))) {
gGraphResource.m_name = graph_name_buffer;
}
ImGui::EndMenuBar();
ImNodes::BeginNodeEditor();
if (ImGui::IsWindowFocused(ImGuiFocusedFlags_RootAndChildWindows) && ImNodes::IsEditorHovered()
&& ImGui::IsMouseReleased(ImGuiMouseButton_Right)) {
AnimNodeResource node_resource = AnimNodeResourceFactory("Blend2");
size_t node_id = gGraphResource.m_nodes.size();
ImNodes::SetNodeScreenSpacePos(node_id, ImGui::GetMousePos());
gGraphResource.m_nodes.push_back(node_resource);
}
for (size_t i = 0, n = gGraphResource.m_nodes.size(); i < n; i++) {
AnimNodeResource& node_resource = gGraphResource.m_nodes[i];
ImNodes::BeginNode(i);
// Header
ImNodes::BeginNodeTitleBar();
ImGui::TextUnformatted(node_resource.m_type_name.c_str());
ImNodes::EndNodeTitleBar();
// Inputs
const std::vector<Socket>& node_inputs =node_resource.m_socket_accessor->m_inputs;
for (size_t j = 0, ni = node_inputs.size(); j < ni; j++) {
const Socket& socket = node_inputs[j];
ImNodes::BeginInputAttribute(GenerateInputAttributeId(i, j));
ImGui::Text(socket.m_name.c_str());
ImNodes::EndInputAttribute();
}
// Outputs
const std::vector<Socket>& node_outputs =node_resource.m_socket_accessor->m_outputs;
for (size_t j = 0, ni = node_outputs.size(); j < ni; j++) {
const Socket& socket = node_outputs[j];
ImNodes::BeginOutputAttribute(GenerateOutputAttributeId(i, j));
ImGui::Text(socket.m_name.c_str());
ImNodes::EndInputAttribute();
}
// Save state in node resource
ImVec2 node_pos = ImNodes::GetNodeGridSpacePos(i);
node_resource.m_position[0] = node_pos[0];
node_resource.m_position[1] = node_pos[1];
ImNodes::EndNode();
}
for (size_t i = 0, n = gGraphResource.m_connections.size(); i < n; i++) {
const AnimGraphConnection& connection = gGraphResource.m_connections[i];
int start_attr, end_attr;
start_attr = GenerateOutputAttributeId(connection.m_source_node_index, connection.m_source_socket_index);
end_attr = GenerateInputAttributeId(connection.m_target_node_index, connection.m_target_socket_index);
ImNodes::Link(i, start_attr, end_attr);
}
ImNodes::EndNodeEditor();
int start_attr, end_attr;
if (ImNodes::IsLinkCreated(&start_attr, &end_attr)) {
int node_start_id;
int node_start_output_index;
SplitOutputAttributeId(start_attr, &node_start_id, &node_start_output_index);
int node_end_id;
int node_end_input_index;
SplitInputAttributeId(end_attr, &node_end_id, &node_end_input_index);
std::cout << "Link created: " << node_start_id << ", " << node_start_output_index << " -> "
<< node_end_id << ", " << node_end_input_index << std::endl;
AnimGraphConnection connection;
connection.m_source_node_index = node_start_id;
connection.m_source_socket_index = node_start_output_index;
connection.m_target_node_index = node_end_id;
connection.m_target_socket_index = node_end_input_index;
gGraphResource.m_connections.push_back(connection);
}
}

10
src/AnimGraphEditor.h Normal file
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//
// Created by martin on 11.02.22.
//
#ifndef ANIMTESTBED_ANIMGRAPHEDITOR_H
#define ANIMTESTBED_ANIMGRAPHEDITOR_H
void AnimGraphEditorUpdate();
#endif //ANIMTESTBED_ANIMGRAPHEDITOR_H

161
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//
// Created by martin on 04.02.22.
//
#include <fstream>
#include "AnimGraphResource.h"
#include "3rdparty/json/json.hpp"
using json = nlohmann::json;
std::string sPinTypeToStr (SocketType pin_type) {
std::string result = "unknown";
switch (pin_type) {
case SocketType::SocketTypeFloat: result = "Float"; break;
case SocketType::SocketTypeAnimation: result = "AnimationData"; break;
default: result = "Unknown";
}
return result;
}
json sSocketToJson(const Socket& pin) {
json result;
result["name"] = pin.m_name;
result["type"] = sPinTypeToStr(pin.m_type);
return result;
}
json sAnimGraphNodeToJson(const AnimNodeResource& node) {
json result;
result["name"] = node.m_name;
result["type"] = "AnimNodeResource";
result["node_type"] = node.m_type_name;
for (size_t j = 0; j < 2; j++) {
result["position"][j] = node.m_position[j];
}
return result;
}
AnimNodeResource sAnimGraphNodeFromJson(const json& json_node) {
AnimNodeResource result;
result.m_name = json_node["name"];
result.m_type_name = json_node["node_type"];
result.m_position[0] = json_node["position"][0];
result.m_position[1] = json_node["position"][1];
result.m_anim_node = AnimNodeFactory(result.m_type_name);
result.m_socket_accessor = AnimNodeAccessorFactory(result.m_type_name, result.m_anim_node);
return result;
}
json sAnimGraphConnectionToJson(const AnimGraphConnection& connection) {
json result;
result["type"] = "AnimGraphConnection";
result["source_node_index"] = connection.m_source_node_index;
result["source_socket_index"] = connection.m_source_socket_index;
result["target_node_index"] = connection.m_target_node_index;
result["target_socket_index"] = connection.m_target_socket_index;
return result;
}
AnimGraphConnection sAnimGraphConnectionFromJson(const json& json_node) {
AnimGraphConnection connection;
connection.m_source_node_index = json_node["source_node_index"];
connection.m_source_socket_index = json_node["source_socket_index"];
connection.m_target_node_index = json_node["target_node_index"];
connection.m_target_socket_index = json_node["target_socket_index"];
return connection;
}
void AnimGraphResource::clear() {
m_name = "";
m_nodes.clear();
m_connections.clear();
}
bool AnimGraphResource::saveToFile (const char* filename) const {
json result;
result["name"] = m_name;
result["type"] = "AnimGraphResource";
for (size_t i = 0; i < m_nodes.size(); i++) {
const AnimNodeResource& node = m_nodes[i];
result["nodes"][i] = sAnimGraphNodeToJson(node);
}
for (size_t i = 0; i < m_connections.size(); i++) {
const AnimGraphConnection& connection = m_connections[i];
result["connections"][i] = sAnimGraphConnectionToJson(connection);
}
std::ofstream output_file;
output_file.open (filename);
output_file << to_string(result) << std::endl;
output_file.close();
return true;
}
bool AnimGraphResource::loadFromFile (const char* filename) {
std::ifstream input_file;
input_file.open(filename);
std::stringstream buffer;
buffer << input_file.rdbuf();
json json_data = json::parse(buffer.str(), nullptr, false);
if (json_data.is_discarded()) {
std::cerr << "Error parsing json of file '" << filename << "'." << std::endl;
}
if (json_data["type"] != "AnimGraphResource") {
std::cerr << "Invalid json object. Expected type 'AnimGraphResource' but got '" << json_data["type"] << "'." << std::endl;
}
clear();
m_name = json_data["name"];
for (size_t i = 0; i < json_data["nodes"].size(); i++) {
const json& json_node = json_data["nodes"][i];
if (json_node["type"] != "AnimNodeResource") {
std::cerr << "Invalid json object. Expected type 'AnimNodeResource' but got '" << json_node["type"] << "'." << std::endl;
return false;
}
AnimNodeResource node = sAnimGraphNodeFromJson(json_node);
m_nodes.push_back(node);
}
for (size_t i = 0; i < json_data["connections"].size(); i++) {
const json& json_connection = json_data["connections"][i];
if (json_connection["type"] != "AnimGraphConnection") {
std::cerr << "Invalid json object. Expected type 'AnimGraphConnection' but got '" << json_connection["type"] << "'." << std::endl;
return false;
}
AnimGraphConnection connection = sAnimGraphConnectionFromJson(json_connection);
m_connections.push_back(connection);
}
return false;
}

556
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@ -0,0 +1,556 @@
//
// Created by martin on 04.02.22.
//
#ifndef ANIMTESTBED_ANIMGRAPHRESOURCE_H
#define ANIMTESTBED_ANIMGRAPHRESOURCE_H
#include <iostream>
#include <map>
#include <string>
#include <type_traits>
#include <vector>
#include "SyncTrack.h"
enum class SocketType {
SocketTypeUndefined,
SocketTypeBool,
SocketTypeAnimation,
SocketTypeFloat,
SocketTypeVec3,
SocketTypeQuat,
SocketTypeString
};
struct AnimData {
float m_bone_transforms[16];
};
typedef float Vec3[3];
typedef float Quat[4];
inline int GenerateInputAttributeId(int node_id, int input_index) {
return ((input_index + 1) << 14) + node_id;
}
inline void
SplitInputAttributeId(int attribute_id, int* node_id, int* input_index) {
*node_id = attribute_id & ((1 << 14) - 1);
*input_index = (attribute_id >> 14) - 1;
}
inline int GenerateOutputAttributeId(int node_id, int output_index) {
return ((output_index + 1) << 23) + node_id;
}
inline void
SplitOutputAttributeId(int attribute_id, int* node_id, int* output_index) {
*node_id = attribute_id & ((1 << 14) - 1);
*output_index = (attribute_id >> 23) - 1;
}
struct AnimNodeResource;
struct Socket {
std::string m_name;
SocketType m_type;
union Value {
bool* flag;
AnimData* anim_data;
float* real;
Vec3* vec3;
Quat* quat;
std::string* str;
bool** flag_ptr;
AnimData** anim_data_ptr;
float** real_ptr;
float** vec3_ptr;
float** quat_ptr;
std::string** str_ptr;
};
Value m_value;
};
struct AnimNode;
struct NodeSocketAccessorBase;
struct AnimNodeResource {
std::string m_name;
std::string m_type_name;
AnimNode* m_anim_node = nullptr;
NodeSocketAccessorBase* m_socket_accessor = nullptr;
float m_position[2] = {0.f, 0.f};
};
struct AnimNode {
virtual ~AnimNode(){};
std::string m_name;
std::string m_node_type_name;
bool m_is_time_synced;
float m_time_now;
float m_time_last;
SyncTrack m_sync_track;
};
struct NodeSocketAccessorBase {
NodeSocketAccessorBase(AnimNode* node) {}
virtual ~NodeSocketAccessorBase() {}
Socket* FindSocket(std::vector<Socket>& sockets, const std::string& name) {
Socket* result = nullptr;
for (size_t i = 0, n = sockets.size(); i < n; i++) {
if (sockets[i].m_name == name) {
result = &sockets[i];
break;
}
}
return result;
}
SocketType GetSocketType(
const std::vector<Socket> sockets,
const std::string& name) {
Socket* socket = FindSocket(m_properties, name);
if (socket == nullptr) {
return SocketType::SocketTypeUndefined;
}
return socket->m_type;
}
template <typename T>
bool RegisterSocket(
std::vector<Socket>& sockets,
const std::string& name,
T* value_ptr) {
Socket* socket = FindSocket(sockets, name);
if (socket != nullptr) {
std::cerr << "Socket " << name << " already registered." << std::endl;
return false;
}
sockets.push_back(Socket());
socket = &sockets[sockets.size() - 1];
socket->m_name = name;
if constexpr (std::is_same<T, float>::value) {
socket->m_value.real = value_ptr;
socket->m_type = SocketType::SocketTypeFloat;
} else if constexpr (std::is_same<T, bool>::value) {
socket->m_value.flag = value_ptr;
socket->m_type = SocketType::SocketTypeBool;
} else if constexpr (std::is_same<T, Vec3>::value) {
socket->m_value.vec3 = value_ptr;
socket->m_type = SocketType::SocketTypeVec3;
} else if constexpr (std::is_same<T, Quat>::value) {
socket->m_value.quat = value_ptr;
socket->m_type = SocketType::SocketTypeQuat;
} else if constexpr (std::is_same<T, AnimData>::value) {
socket->m_value.anim_data = value_ptr;
socket->m_type = SocketType::SocketTypeAnimation;
} else if constexpr (std::is_same<T, std::string>::value) {
socket->m_value.str = value_ptr;
socket->m_type = SocketType::SocketTypeString;
} else if constexpr (std::is_same<T, float*>::value) {
socket->m_value.real_ptr = value_ptr;
socket->m_type = SocketType::SocketTypeFloat;
} else if constexpr (std::is_same<T, bool*>::value) {
socket->m_value.flag_ptr = value_ptr;
socket->m_type = SocketType::SocketTypeBool;
} else if constexpr (std::is_same<T, Vec3*>::value) {
socket->m_value.vec3_ptr = value_ptr;
socket->m_type = SocketType::SocketTypeVec3;
} else if constexpr (std::is_same<T, Quat*>::value) {
socket->m_value.quat_ptr = value_ptr;
socket->m_type = SocketType::SocketTypeQuat;
} else if constexpr (std::is_same<T, AnimData*>::value) {
socket->m_value.anim_data_ptr = value_ptr;
socket->m_type = SocketType::SocketTypeAnimation;
} else if constexpr (std::is_same<T, std::string*>::value) {
socket->m_value.str_ptr = value_ptr;
socket->m_type = SocketType::SocketTypeString;
} else {
std::cerr << "Cannot register socket, invalid type." << std::endl;
return false;
}
return true;
}
template <typename T>
bool SetSocketValue(
std::vector<Socket>& sockets,
const std::string& name,
T value) {
Socket* socket = FindSocket(sockets, name);
if (socket == nullptr) {
return false;
}
if constexpr (std::is_same<T, float>::value) {
(*socket->m_value.real) = value;
} else if constexpr (std::is_same<T, bool>::value) {
(*socket->m_value.flag) = value;
} else if constexpr (std::is_same<T, Vec3>::value) {
(*socket->m_value.vec3) = value;
} else if constexpr (std::is_same<T, Quat>::value) {
(*socket->m_value.vec3) = value;
} else if constexpr (std::is_same<T, AnimData>::value) {
(*socket->m_value.vec3) = value;
} else if constexpr (std::is_same<T, std::string>::value) {
(*socket->m_value.str) = value;
} else {
std::cerr << "Invalid type!" << std::endl;
return false;
}
return true;
}
template <typename T>
bool SetSocketRef(
std::vector<Socket>& sockets,
const std::string& name,
T* value) {
Socket* socket = FindSocket(sockets, name);
if (socket == nullptr) {
return false;
} else if constexpr (std::is_same<T, float>::value) {
(*socket->m_value.real_ptr) = value;
} else if constexpr (std::is_same<T, bool>::value) {
(*socket->m_value.flag_ptr) = value;
} else if constexpr (std::is_same<T, Vec3>::value) {
(*socket->m_value.vec3_ptr) = value;
} else if constexpr (std::is_same<T, Quat>::value) {
(*socket->m_value.quat_ptr) = value;
} else if constexpr (std::is_same<T, AnimData>::value) {
(*socket->m_value.anim_data_ptr) = value;
} else if constexpr (std::is_same<T, std::string>::value) {
(*socket->m_value.str_ptr) = value;
} else {
std::cerr << "Invalid type!" << std::endl;
return false;
}
return true;
}
template <typename T>
T* GetSocketValue(
std::vector<Socket>& sockets,
const std::string& name,
T* default_value) {
Socket* socket = FindSocket(sockets, name);
if (socket == nullptr) {
return default_value;
}
if constexpr (std::is_same<T, float>::value) {
return socket->m_value.real;
} else if constexpr (std::is_same<T, Vec3>::value) {
return socket->m_value.vec3;
} else if constexpr (std::is_same<T, bool>::value) {
return socket->m_value.flag;
} else if constexpr (std::is_same<T, Quat>::value) {
return socket->m_value.vec3;
} else if constexpr (std::is_same<T, AnimData>::value) {
return socket->m_value.anim_data;
} else if constexpr (std::is_same<T, std::string>::value) {
return socket->m_value.str;
}
std::cerr << "Invalid type!" << std::endl;
return nullptr;
}
template <typename T>
bool RegisterProperty(const std::string& name, T* value) {
return RegisterSocket(m_properties, name, value);
}
template <typename T>
bool SetProperty(const std::string& name, T value) {
return SetSocketValue(m_properties, name, value);
}
template <typename T>
T GetProperty(const std::string& name, T value) {
return GetSocketValue(m_properties, name, value);
}
SocketType GetPropertyType(const std::string& name) {
return GetSocketType(m_properties, name);
}
template <typename T>
bool RegisterInput(const std::string& name, T* value) {
return RegisterSocket(m_inputs, name, value);
}
template <typename T>
bool SetInput(const std::string& name, T value) {
return SetSocketValue(m_inputs, name, value);
}
template <typename T>
T* GetInput(const std::string& name, T* value) {
return GetSocketValue(m_inputs, name, value);
}
SocketType GetInputType(const std::string& name) {
return GetSocketType(m_inputs, name);
}
template <typename T>
bool RegisterOutput(const std::string& name, T** value) {
return RegisterSocket(m_outputs, name, value);
}
template <typename T>
bool SetOutputRef(const std::string& name, T* value) {
return SetSocketRef(m_outputs, name, value);
}
SocketType GetOutputType(const std::string& name) {
return GetSocketType(m_outputs, name);
}
std::vector<Socket> m_properties;
std::vector<Socket> m_inputs;
std::vector<Socket> m_outputs;
};
template <typename T>
struct NodeSocketAccessor : public NodeSocketAccessorBase {
virtual ~NodeSocketAccessor() {}
};
struct NodeRegistry {
AnimNode* createNode(const std::string& node_type);
NodeSocketAccessorBase* createNodeAccessor(
const std::string& node_type,
AnimNode* node);
};
struct Blend2Node : public AnimNode {
AnimData m_input0;
AnimData m_input1;
AnimData* m_output = nullptr;
float m_blend_weight = 0.f;
bool m_sync_blend = false;
};
template <>
struct NodeSocketAccessor<Blend2Node> : public NodeSocketAccessorBase {
NodeSocketAccessor(AnimNode* node_) : NodeSocketAccessorBase(node_) {
Blend2Node* node = dynamic_cast<Blend2Node*>(node_);
RegisterInput("Input0", &node->m_input0);
RegisterInput("Input1", &node->m_input1);
RegisterInput("Weight", &node->m_blend_weight);
RegisterOutput("Output", &node->m_output);
RegisterProperty("Sync", &node->m_sync_blend);
}
};
struct SpeedScaleNode : public AnimNode {
AnimData m_input;
AnimData* m_output = nullptr;
float m_speed_scale = 0.f;
};
template <>
struct NodeSocketAccessor<SpeedScaleNode> : public NodeSocketAccessorBase {
NodeSocketAccessor(AnimNode* node_) : NodeSocketAccessorBase(node_) {
SpeedScaleNode* node = dynamic_cast<SpeedScaleNode*>(node_);
RegisterInput("SpeedScale", &node->m_speed_scale);
RegisterInput("Input", &node->m_input);
RegisterOutput("Output", &node->m_output);
}
};
struct AnimSamplerNode : public AnimNode {
AnimData* m_output = nullptr;
std::string m_filename;
};
template <>
struct NodeSocketAccessor<AnimSamplerNode> : public NodeSocketAccessorBase {
NodeSocketAccessor(AnimNode* node_) : NodeSocketAccessorBase(node_) {
AnimSamplerNode* node = dynamic_cast<AnimSamplerNode*>(node_);
RegisterOutput("Output", &node->m_output);
RegisterProperty("Filename", &node->m_filename);
}
};
struct AnimGraphConnection {
int m_source_node_index;
int m_source_socket_index;
int m_target_node_index;
int m_target_socket_index;
};
struct AnimGraphResource {
std::string m_name;
std::vector<AnimNodeResource> m_nodes;
std::vector<AnimGraphConnection> m_connections;
std::vector<Socket> m_inputs;
std::vector<Socket> m_outputs;
void clear();
bool saveToFile(const char* filename) const;
bool loadFromFile(const char* filename);
};
static inline AnimNode* AnimNodeFactory(const std::string& name) {
if (name == "Blend2") {
return new Blend2Node;
} else if (name == "SpeedScale") {
return new SpeedScaleNode;
} else if (name == "AnimSampler") {
return new AnimSamplerNode;
}
std::cerr << "Invalid node type: " << name << std::endl;
return nullptr;
}
static inline NodeSocketAccessorBase* AnimNodeAccessorFactory(
const std::string& node_type_name,
AnimNode* node) {
if (node_type_name == "Blend2") {
return new NodeSocketAccessor<Blend2Node>(node);
} else if (node_type_name == "SpeedScale") {
return new NodeSocketAccessor<SpeedScaleNode>(node);
} else if (node_type_name == "AnimSampler") {
return new NodeSocketAccessor<AnimSamplerNode>(node);
} else {
std::cerr << "Invalid node type name " << node_type_name << "."
<< std::endl;
}
return nullptr;
}
static inline AnimNodeResource AnimNodeResourceFactory(
const std::string& node_type_name) {
AnimNodeResource result;
result.m_type_name = node_type_name;
result.m_anim_node = AnimNodeFactory(node_type_name);
result.m_socket_accessor =
AnimNodeAccessorFactory(node_type_name, result.m_anim_node);
return result;
}
struct AnimGraph {
void UpdateTime(float dt);
void Evaluate();
AnimData m_local_transforms;
std::vector<AnimNode*> m_nodes;
std::vector<std::vector<AnimNode*> > m_node_inputs;
AnimNode* getAnimNode(const char* name) {
for (size_t i = 0; i < m_nodes.size(); i++) {
if (m_nodes[i]->m_name == name) {
return m_nodes[i];
}
}
return nullptr;
}
size_t getAnimNodeIndex(AnimNode* node) {
for (size_t i = 0, n = m_nodes.size(); i < n; i++) {
if (m_nodes[i] == node) {
return i;
}
}
std::cerr << "Could not find node " << node << "." << std::endl;
return -1;
}
static AnimGraph createFromResource(const AnimGraphResource& resource) {
AnimGraph result;
for (int i = 0; i < resource.m_nodes.size(); i++) {
const AnimNodeResource& node_resource = resource.m_nodes[i];
AnimNode* node = AnimNodeFactory(node_resource.m_type_name.c_str());
node->m_name = node_resource.m_name;
node->m_node_type_name = node_resource.m_type_name;
result.m_nodes.push_back(node);
result.m_node_inputs.push_back(std::vector<AnimNode*>());
}
for (int i = 0; i < resource.m_connections.size(); i++) {
const AnimGraphConnection& connection = resource.m_connections[i];
std::string source_node_type = "";
std::string target_node_type = "";
std::string source_node_name = "";
std::string target_node_name = "";
AnimNode* source_node = nullptr;
AnimNode* target_node = nullptr;
NodeSocketAccessorBase* source_node_accessor = nullptr;
NodeSocketAccessorBase* target_node_accessor = nullptr;
SocketType source_type;
SocketType target_type;
if (connection.m_source_node_index >= 0) {
source_node = result.m_nodes[connection.m_source_node_index];
source_node_name = source_node->m_name;
source_node_type = source_node->m_node_type_name;
source_node_accessor =
AnimNodeAccessorFactory(source_node_type, source_node);
}
if (connection.m_target_node_index >= 0) {
target_node = result.m_nodes[connection.m_target_node_index];
target_node_name = target_node->m_name;
target_node_type = target_node->m_node_type_name;
target_node_accessor =
AnimNodeAccessorFactory(target_node_type, target_node);
}
assert(source_node != nullptr);
assert(target_node != nullptr);
if (connection.m_source_socket_index
> source_node_accessor->m_outputs.size()) {
std::cerr << "Invalid source socket index "
<< connection.m_source_socket_index << ". Only "
<< source_node_accessor->m_outputs.size()
<< " output sockets found." << std::endl;
continue;
}
if (connection.m_target_socket_index
> target_node_accessor->m_inputs.size()) {
std::cerr << "Invalid source socket index "
<< connection.m_target_socket_index << ". Only "
<< source_node_accessor->m_inputs.size()
<< " input sockets found." << std::endl;
continue;
}
if (source_node_accessor->m_outputs[connection.m_source_socket_index].m_type
!= target_node_accessor->m_inputs[connection.m_target_socket_index].m_type) {
std::cerr << "Invalid connection connecting nodes '" << source_node_name
<< "' and '" << target_node_name << "'." << std::endl;
return result;
}
// TODO! How to wire up the different types?
// std::string socket_name = connection.m_target_socket_name;
// AnimData* input_ref =
// target_node_accessor->GetInput<AnimData>(socket_name, nullptr);
// source_node_accessor->SetOutputRef(
// connection.m_source_socket_name,
// input_ref);
size_t target_node_index = result.getAnimNodeIndex(target_node);
result.m_node_inputs[target_node_index].push_back(source_node);
}
return result;
}
};
#endif //ANIMTESTBED_ANIMGRAPHRESOURCE_H

60
src/main.cc
View File

@ -5,6 +5,7 @@
//------------------------------------------------------------------------------
#include "imgui.h"
#include "imnodes.h"
#define SOKOL_IMPL
#define SOKOL_GLCORE33
#include "sokol_gfx.h"
@ -16,6 +17,7 @@
#include "Camera.h"
#include "SkinnedMesh.h"
#include "AnimGraphEditor.h"
#include "GLFW/glfw3.h"
const int Width = 1024;
@ -108,6 +110,15 @@ enum class ControlMode {
ControlMode gControlMode = ControlMode::ControlModeNone;
enum class AppMode {
AnimRuntime = 0,
GraphEditor = 1,
Debug = 2
};
const char* AppModeNames[] = {"Runtime", "Graph Editor", "Debug"};
AppMode gAppMode = AppMode::GraphEditor;
// io buffers for skeleton and animation data files, we know the max file size upfront
static uint8_t skel_data_buffer[4 * 1024];
static uint8_t anim_data_buffer[32 * 1024];
@ -262,6 +273,9 @@ int main() {
io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
// ImNodes
ImNodes::CreateContext();
// dynamic vertex- and index-buffers for imgui-generated geometry
sg_buffer_desc vbuf_desc = {};
vbuf_desc.usage = SG_USAGE_STREAM;
@ -356,14 +370,6 @@ int main() {
io.DeltaTime = (float)stm_sec(stm_laptime(&last_time));
ImGui::NewFrame();
ImGui::Begin("Camera");
ImGui::SliderFloat3("pos", state.camera.pos, -100.f, 100.f);
ImGui::SliderFloat("near", &state.camera.near, 0.001f, 10.f);
ImGui::SliderFloat("far", &state.camera.far, 1.0f, 10000.f);
ImGui::SliderFloat("heading", &state.camera.heading, -180.0f, 180.f);
ImGui::SliderFloat("pitch", &state.camera.pitch, -179.0f, 179.f);
ImGui::End();
// handle input
handle_mouse (w, &gGuiInputState);
@ -427,14 +433,32 @@ int main() {
if (ImGui::BeginMainMenuBar()) {
ImGui::Text("AnimTestbed");
int mode_current = static_cast<int>(gAppMode);
if (ImGui::Combo("Mode", &mode_current, AppModeNames, sizeof(AppModeNames) / sizeof(char*))) {
switch (mode_current) {
case 0: gAppMode = AppMode::AnimRuntime; break;
case 1: gAppMode = AppMode::GraphEditor; break;
case 2: gAppMode = AppMode::Debug; break;
default: break;
}
}
ImGui::Checkbox("ImGui Demo", &show_imgui_demo_window);
ImGui::EndMainMenuBar();
}
if (gAppMode == AppMode::AnimRuntime) {
ImGui::Begin("Camera");
ImGui::SliderFloat3("pos", state.camera.pos, -100.f, 100.f);
ImGui::SliderFloat("near", &state.camera.near, 0.001f, 10.f);
ImGui::SliderFloat("far", &state.camera.far, 1.0f, 10000.f);
ImGui::SliderFloat("heading", &state.camera.heading, -180.0f, 180.f);
ImGui::SliderFloat("pitch", &state.camera.pitch, -179.0f, 179.f);
ImGui::End();
ImGui::SetNextWindowPos(ImVec2(600, 60), ImGuiCond_FirstUseEver);
ImGui::SetNextWindowSize(ImVec2(300, 400), ImGuiCond_FirstUseEver);
draw_grid();
ImGui::SetNextWindowPos(ImVec2 (600, 60), ImGuiCond_FirstUseEver);
ImGui::SetNextWindowSize(ImVec2 (300, 400), ImGuiCond_FirstUseEver);
skinned_mesh.DrawDebugUi();
animation_controller.DrawDebugUi();
@ -450,6 +474,18 @@ int main() {
sgl_matrix_mode_modelview();
sgl_load_matrix((const float*)&state.camera.mtxView);
RenderSkinnedMesh(skinned_mesh);
} else if (gAppMode == AppMode::GraphEditor) {
ImGui::SetNextWindowPos(ImVec2(20, 20), ImGuiCond_FirstUseEver);
ImGui::SetNextWindowSize(ImVec2(500, 400), ImGuiCond_FirstUseEver);
ImGui::Begin("Graph Editor", nullptr, ImGuiWindowFlags_MenuBar);
AnimGraphEditorUpdate();
ImGui::End();
} else if (gAppMode == AppMode::Debug) {
ImGui::SetNextWindowPos(ImVec2(460, 20), ImGuiCond_FirstUseEver);
ImGui::Begin("Debug");
ImGui::End();
}
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowDemoWindow()
if (show_imgui_demo_window) {
@ -457,7 +493,6 @@ int main() {
ImGui::ShowDemoWindow();
}
// the sokol_gfx draw pass
sg_begin_default_pass(&pass_action, cur_width, cur_height);
sgl_draw();
@ -469,9 +504,8 @@ int main() {
glfwPollEvents();
}
// state.ozz = nullptr;
/* cleanup */
ImNodes::DestroyContext();
ImGui::DestroyContext();
sgl_shutdown();
sg_shutdown();

99
tests/AnimGraphResourceTests.cc Normal file
View File

@ -0,0 +1,99 @@
//
// Created by martin on 04.02.22.
//
#include "AnimGraphResource.h"
#include "catch.hpp"
TEST_CASE("BasicGraph", "[AnimGraphResource]") {
AnimGraphResource graph_resource;
graph_resource.m_name = "WalkRunBlendGraph";
AnimNodeResource walk_node;
walk_node.m_name = "WalkAnim";
walk_node.m_type_name = "AnimSampler";
graph_resource.m_nodes.push_back(walk_node);
AnimNodeResource run_node;
run_node.m_name = "RunAnim";
run_node.m_type_name = "AnimSampler";
graph_resource.m_nodes.push_back(run_node);
AnimNodeResource blend_node;
blend_node.m_name = "BlendWalkRun";
blend_node.m_type_name = "Blend2";
graph_resource.m_nodes.push_back(blend_node);
AnimGraphConnection walk_to_blend;
walk_to_blend.m_source_node = &walk_node;
walk_to_blend.m_source_socket_name = "Output";
walk_to_blend.m_target_node = &blend_node;
walk_to_blend.m_target_socket_name = "Input0";
graph_resource.m_connections.push_back(walk_to_blend);
AnimGraphConnection run_to_blend;
run_to_blend.m_source_node = &run_node;
run_to_blend.m_source_socket_name = "Output";
run_to_blend.m_target_node = &blend_node;
run_to_blend.m_target_socket_name = "Input1";
graph_resource.m_connections.push_back(run_to_blend);
AnimGraphConnection blend_to_output;
blend_to_output.m_source_node = &blend_node;
blend_to_output.m_source_socket_name = "Output";
blend_to_output.m_target_socket_name = "GraphOutput";
graph_resource.m_connections.push_back(blend_to_output);
graph_resource.saveToFile("WalkGraph.animgraph.json");
AnimGraph graph = AnimGraph::createFromResource(graph_resource);
for (size_t i = 0; i < graph.m_nodes.size(); i++) {
const AnimNode* node = graph.m_nodes[i];
std::cout << node->m_name << " [" << node->m_node_type_name << "]"
<< std::endl;
}
CHECK(graph.m_nodes.size() == 3);
CHECK(graph.m_nodes[0]->m_node_type_name == "AnimSampler");
CHECK(graph.m_nodes[1]->m_node_type_name == "AnimSampler");
CHECK(graph.m_nodes[2]->m_node_type_name == "Blend2");
AnimSamplerNode* anim_sampler_instance0 =
dynamic_cast<AnimSamplerNode*>(graph.m_nodes[0]);
AnimSamplerNode* anim_sampler_instance1 =
dynamic_cast<AnimSamplerNode*>(graph.m_nodes[1]);
Blend2Node* blend2_instance = dynamic_cast<Blend2Node*>(graph.m_nodes[2]);
CHECK(anim_sampler_instance0->m_output == &blend2_instance->m_input0);
CHECK(anim_sampler_instance1->m_output == &blend2_instance->m_input1);
size_t anim_sampler_index0 = graph.getAnimNodeIndex(anim_sampler_instance0);
size_t anim_sampler_index1 = graph.getAnimNodeIndex(anim_sampler_instance1);
size_t blend_index = graph.getAnimNodeIndex(blend2_instance);
CHECK(graph.m_node_inputs[anim_sampler_index0].size() == 0);
CHECK(graph.m_node_inputs[anim_sampler_index1].size() == 0);
CHECK(graph.m_node_inputs[blend_index].size() == 2);
CHECK(graph.m_node_inputs[blend_index][0] == anim_sampler_instance0);
CHECK(graph.m_node_inputs[blend_index][1] == anim_sampler_instance1);
}
TEST_CASE("InputAttributeConversion", "[AnimGraphResource]") {
int node_id = 3321;
int input_index = 221;
int output_index = 125;
int parsed_node_id;
int parsed_input_index;
int parsed_output_index;
int attribute_id = GenerateInputAttributeId(node_id, input_index);
SplitInputAttributeId(attribute_id, &parsed_node_id, &parsed_input_index);
CHECK(node_id == parsed_node_id);
CHECK(input_index == parsed_input_index);
attribute_id = GenerateOutputAttributeId(node_id, output_index);
SplitOutputAttributeId(attribute_id, &parsed_node_id, &parsed_output_index);
CHECK(node_id == parsed_node_id);
CHECK(output_index == parsed_output_index);
}

20
tests/AnimSampleNodeTests.cc
View File

@ -95,7 +95,7 @@ TEST_CASE("Sample single bone channel", "[AnimSamplerNode]") {
ozz::math::Transform calculated_root_transform;
calc_bone_translation(ratio, 0, animation, calculated_root_transform);
std::cout << "ratio: " << ratio << "\t" << "err: " << ozz::math::Length(sampled_root_transform.translation - calculated_root_transform.translation) << std::endl;
// std::cout << "ratio: " << ratio << "\t" << "err: " << ozz::math::Length(sampled_root_transform.translation - calculated_root_transform.translation) << std::endl;
}
ozz::math::Transform root_transform_1;
@ -114,13 +114,13 @@ TEST_CASE("Root Bone Sampling", "[AnimSamplerNode]") {
2,
walking_markers);
AnimationController anim_controller(&skinned_mesh);
AnimSamplerNode test_node(&anim_controller);
test_node.SetAnimation(skinned_mesh.m_animations[0], SyncTrack());
test_node.Reset();
test_node.UpdateTime(0.2f);
ozz::math::Transform root_transform;
test_node.Evaluate(&skinned_mesh.m_local_matrices, &root_transform);
// AnimationController anim_controller(&skinned_mesh);
// AnimSamplerNode test_node(&anim_controller);
// test_node.SetAnimation(skinned_mesh.m_animations[0], SyncTrack());
//
// test_node.Reset();
// test_node.UpdateTime(0.2f);
//
// ozz::math::Transform root_transform;
// test_node.Evaluate(&skinned_mesh.m_local_matrices, &root_transform);
}