Started thedmd/imgui-node-editor integration

src/main.cc

@@ -22,6 +22,7 @@
 #include "SkinnedMesh.h"
 #include "SkinnedMeshResource.h"
 #include "src/AnimGraph/AnimGraphEditor.h"
+#include "3rdparty/imgui-node-editor/imgui_node_editor.h"
 
 const int Width = 1024;
 const int Height = 768;
@@ -172,13 +173,22 @@ struct ApplicationConfig {
   int window_position[2] = {100, 30};
   int window_size[2] = {1000, 600};
 
-  struct GraphEditor {
+  struct LegacyGraphEditor {
     bool visible = false;
     int position[2] = {20, 20};
     int size[2] = {800, 500};
   };
-  GraphEditor graph_editor;
+  LegacyGraphEditor legacy_graph_editor;
 
+  struct GraphEditor {
+    bool visible = false;
+    int position[2] = {20, 20};
+    int size[2] = {800, 500};
+    ax::NodeEditor::Config config = {};
+    ax::NodeEditor::EditorContext* context = nullptr;
+  };
+  GraphEditor graph_editor;
+  
   struct SkinnedMeshWidget {
     bool visible = false;
     int position[2] = {20, 20};
@@ -215,12 +225,18 @@ void to_json(nlohmann::json& j, const ApplicationConfig& config) {
   j["main_window"]["size"][0] = config.window_size[0];
   j["main_window"]["size"][1] = config.window_size[1];
 
+  j["legacy_graph_editor"]["visible"] = config.legacy_graph_editor.visible;
+  j["legacy_graph_editor"]["position"][0] = config.legacy_graph_editor.position[0];
+  j["legacy_graph_editor"]["position"][1] = config.legacy_graph_editor.position[1];
+  j["legacy_graph_editor"]["size"][0] = config.legacy_graph_editor.size[0];
+  j["legacy_graph_editor"]["size"][1] = config.legacy_graph_editor.size[1];
+
   j["graph_editor"]["visible"] = config.graph_editor.visible;
   j["graph_editor"]["position"][0] = config.graph_editor.position[0];
   j["graph_editor"]["position"][1] = config.graph_editor.position[1];
   j["graph_editor"]["size"][0] = config.graph_editor.size[0];
   j["graph_editor"]["size"][1] = config.graph_editor.size[1];
-
+  
   j["skinned_mesh_widget"]["visible"] = config.skinned_mesh_widget.visible;
   j["skinned_mesh_widget"]["position"][0] =
       config.skinned_mesh_widget.position[0];
@@ -266,11 +282,29 @@ void from_json(const nlohmann::json& j, ApplicationConfig& config) {
     }
   }
 
+  if (j.contains("legacy_graph_editor")) {
+    if (j["legacy_graph_editor"].contains("visible")) {
+      config.legacy_graph_editor.visible = j["legacy_graph_editor"]["visible"];
+    }
+
+    if (j["legacy_graph_editor"].contains("position")
+        and j["legacy_graph_editor"]["position"].size() == 2) {
+      config.legacy_graph_editor.position[0] = j["legacy_graph_editor"]["position"].at(0);
+      config.legacy_graph_editor.position[1] = j["legacy_graph_editor"]["position"].at(1);
+    }
+
+    if (j["legacy_graph_editor"].contains("size")
+        and j["legacy_graph_editor"]["size"].size() == 2) {
+      config.legacy_graph_editor.size[0] = j["legacy_graph_editor"]["size"].at(0);
+      config.legacy_graph_editor.size[1] = j["legacy_graph_editor"]["size"].at(1);
+    }
+  }
+
   if (j.contains("graph_editor")) {
     if (j["graph_editor"].contains("visible")) {
       config.graph_editor.visible = j["graph_editor"]["visible"];
     }
-
+    
     if (j["graph_editor"].contains("position")
         and j["graph_editor"]["position"].size() == 2) {
       config.graph_editor.position[0] = j["graph_editor"]["position"].at(0);
@@ -283,7 +317,7 @@ void from_json(const nlohmann::json& j, ApplicationConfig& config) {
       config.graph_editor.size[1] = j["graph_editor"]["size"].at(1);
     }
   }
-
+  
   if (j.contains("skinned_mesh_widget")) {
     if (j["skinned_mesh_widget"].contains("visible")) {
       config.skinned_mesh_widget.visible = j["skinned_mesh_widget"]["visible"];
@@ -636,6 +670,10 @@ int main() {
 
   Viewport offscreen_viewport;
 
+  // Graph Editor
+  gApplicationConfig.graph_editor.config.SettingsFile = "graph_editor.json";
+  gApplicationConfig.graph_editor.context = ax::NodeEditor::CreateEditor(&gApplicationConfig.graph_editor.config);
+
   // draw loop
   while (!glfwWindowShouldClose(w)) {
     // Update time
@@ -762,6 +800,10 @@ int main() {
             &gApplicationConfig.animation_player_widget.visible);
 
         ImGui::Separator();
+        ImGui::Checkbox(
+            "Legacy Graph Editor",
+            &gApplicationConfig.legacy_graph_editor.visible);
+
         ImGui::Checkbox(
             "ImGui Demo",
             &gApplicationConfig.show_imgui_demo_window);
@@ -1031,6 +1073,86 @@ int main() {
       gApplicationConfig.graph_editor.size[0] = graph_editor_size.x;
       gApplicationConfig.graph_editor.size[1] = graph_editor_size.y;
 
+      ax::NodeEditor::SetCurrentEditor(gApplicationConfig.graph_editor.context);
+      ax::NodeEditor::Begin("Graph Editor");
+
+      int unique_id = 1;
+      ax::NodeEditor::BeginNode(unique_id++);
+
+      // Node A
+      ImGui::Text("Node A");
+      ax::NodeEditor::BeginPin(unique_id++, ax::NodeEditor::PinKind::Input);
+      ImGui::Text("In");
+      ax::NodeEditor::EndPin();
+      ImGui::SameLine();
+      ax::NodeEditor::BeginPin(unique_id++, ax::NodeEditor::PinKind::Output);
+      ImGui::Text("Out");
+      ax::NodeEditor::EndPin();
+
+      ax::NodeEditor::EndNode();
+
+      // Node B
+      ax::NodeEditor::BeginNode(unique_id++);
+
+      ImGui::Text("Node B");
+      ax::NodeEditor::BeginPin(unique_id++, ax::NodeEditor::PinKind::Input);
+      ImGui::Text("In");
+      ax::NodeEditor::EndPin();
+      ImGui::SameLine();
+      ax::NodeEditor::BeginPin(unique_id++, ax::NodeEditor::PinKind::Output);
+      ImGui::Text("Out");
+      ax::NodeEditor::EndPin();
+
+      ax::NodeEditor::EndNode();
+
+      // Create Connections
+      if (ax::NodeEditor::BeginCreate()) {
+        ax::NodeEditor::PinId input_pin_id, output_pin_id;
+        if (ax::NodeEditor::QueryNewLink(&input_pin_id, &output_pin_id)) {
+          if (input_pin_id && output_pin_id) {
+            if (ax::NodeEditor::AcceptNewItem()) {
+
+            }
+          }
+        }
+      }
+      ax::NodeEditor::EndCreate();
+
+      ax::NodeEditor::End();
+
+      ax::NodeEditor::SetCurrentEditor(nullptr);
+
+
+
+      ImGui::End();
+    }
+
+    // Legacy Animation Graph Editor
+    if (gApplicationConfig.legacy_graph_editor.visible) {
+      ImGui::SetNextWindowPos(
+          ImVec2(
+              gApplicationConfig.legacy_graph_editor.position[0],
+              gApplicationConfig.legacy_graph_editor.position[1]),
+          ImGuiCond_FirstUseEver);
+      ImGui::SetNextWindowSize(
+          ImVec2(
+              gApplicationConfig.legacy_graph_editor.size[0],
+              gApplicationConfig.legacy_graph_editor.size[1]),
+          ImGuiCond_FirstUseEver);
+
+      ImGui::Begin(
+          "Legacy Graph Editor",
+          &gApplicationConfig.legacy_graph_editor.visible,
+          ImGuiWindowFlags_MenuBar);
+
+      ImVec2 graph_editor_position = ImGui::GetWindowPos();
+      gApplicationConfig.legacy_graph_editor.position[0] = graph_editor_position.x;
+      gApplicationConfig.legacy_graph_editor.position[1] = graph_editor_position.y;
+
+      ImVec2 graph_editor_size = ImGui::GetWindowSize();
+      gApplicationConfig.legacy_graph_editor.size[0] = graph_editor_size.x;
+      gApplicationConfig.legacy_graph_editor.size[1] = graph_editor_size.y;
+
       AnimGraphEditorUpdate();
 
       ImGui::End();
@@ -1065,6 +1187,7 @@ int main() {
   save_application_config("animtestbed_config.json");
 
   /* cleanup */
+  ax::NodeEditor::DestroyEditor(gApplicationConfig.graph_editor.context);
   ImNodes::DestroyContext();
   ImGui::DestroyContext();
   sgl_shutdown();