141 lines
4.0 KiB
Markdown
141 lines
4.0 KiB
Markdown
# Header only C++ tiny glTF library(loader/saver).
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`TinyGLTF` is a header only C++11 glTF 2.0 https://github.com/KhronosGroup/glTF library.
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## Status
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Work in process(`devel` branch). Very near to release, but need more tests and examples.
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`TinyGLTF` uses Niels Lohmann's json library(https://github.com/nlohmann/json), so now it requires C++11 compiler.
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If you are looking for old, C++03 version, please use `devel-picojson` branch.
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## Builds
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[](https://travis-ci.org/syoyo/tinygltf)
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[](https://ci.appveyor.com/project/syoyo/tinygltf)
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## Features
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* Written in portable C++. C++-11 with STL dependency only.
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* [x] macOS + clang(LLVM)
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* [x] iOS + clang
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* [x] Linux + gcc/clang
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* [x] Windows + MinGW
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* [x] Windows + Visual Studio 2015 or later.
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* Visual Studio 2013 is not supported since they have limited C++11 support and failed to compile `json.hpp`.
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* [x] Android + CrystaX(NDK drop-in replacement) GCC
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* [x] Web using Emscripten(LLVM)
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* Moderate parsing time and memory consumption.
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* glTF specification v2.0.0
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* [x] ASCII glTF
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* [x] Binary glTF(GLB)
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* [x] PBR material description
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* Buffers
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* [x] Parse BASE64 encoded embedded buffer fata(DataURI).
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* [x] Load `.bin` file.
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* Image(Using stb_image)
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* [x] Parse BASE64 encoded embedded image fata(DataURI).
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* [x] Load external image file.
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* [x] PNG(8bit only)
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* [x] JPEG(8bit only)
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* [x] BMP
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* [x] GIF
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## Examples
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* [glview](examples/glview) : Simple glTF geometry viewer.
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* [validator](examples/validator) : Simple glTF validator with JSON schema.
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## TODOs
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* [ ] Write C++ code generator from json schema for robust parsing.
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* [x] Serialization
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* [ ] Compression/decompression(Open3DGC, etc)
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* [ ] Support `extensions` and `extras` property
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* [ ] HDR image?
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* [ ] Write tests for `animation` and `skin`
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## Licenses
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TinyGLTF is licensed under MIT license.
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TinyGLTF uses the following third party libraries.
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* json.hpp : Copyright (c) 2013-2017 Niels Lohmann. MIT license.
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* base64 : Copyright (C) 2004-2008 René Nyffenegger
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* stb_image.h : v2.08 - public domain image loader - http://nothings.org/stb_image.h
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## Build and example
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Copy `stb_image.h`, `json.hpp` and `tiny_gltf.h` to your project.
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### Loading glTF 2.0 model
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```c++
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// Define these only in *one* .cc file.
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#define TINYGLTF_IMPLEMENTATION
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#define STB_IMAGE_IMPLEMENTATION
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// #define TINYGLTF_NOEXCEPTION // optional. disable exception handling.
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#include "tiny_gltf.h"
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using namespace tinygltf;
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Model model;
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TinyGLTF loader;
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std::string err;
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bool ret = loader.LoadASCIIFromFile(&model, &err, argv[1]);
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//bool ret = loader.LoadBinaryFromFile(&model, &err, argv[1]); // for binary glTF(.glb)
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if (!err.empty()) {
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printf("Err: %s\n", err.c_str());
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}
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if (!ret) {
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printf("Failed to parse glTF\n");
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return -1;
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}
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```
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## Compile options
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* `TINYGLTF_NOEXCEPTION` : Disable C++ exception in JSON parsing. You can use `-fno-exceptions` or by defining the symbol `JSON_NOEXCEPTION` and `TINYGLTF_NOEXCEPTION` to fully remove C++ exception codes when compiling TinyGLTF.
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* `TINYGLTF_NO_STB_IMAGE` : Do not load images with stb_image. Instead use `TinyGLTF::SetImageLoader(LoadimageDataFunction LoadImageData, void *user_data)` to set a callback for loading images.
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### Saving gltTF 2.0 model
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T.B.W.
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## Running tests.
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### glTF parsing test
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#### Setup
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Python 2.6 or 2.7 required.
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Git clone https://github.com/KhronosGroup/glTF-Sample-Models to your local dir.
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#### Run parsing test
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After building `loader_example`, edit `test_runner.py`, then,
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```bash
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$ python test_runner.py
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```
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### Unit tests
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```bash
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$ cd tests
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$ make
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$ ./tester
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$ ./tester_noexcept
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```
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## Third party licenses
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* json.hpp : Licensed under the MIT License <http://opensource.org/licenses/MIT>. Copyright (c) 2013-2017 Niels Lohmann <http://nlohmann.me>.
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* stb_image : Public domain.
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* catch : Copyright (c) 2012 Two Blue Cubes Ltd. All rights reserved. Distributed under the Boost Software License, Version 1.0.
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