git subrepo clone (merge) https://github.com/HarbourMasters/otrgui.git OTRGui

subrepo:
  subdir:   "OTRGui"
  merged:   "a6066a251"
upstream:
  origin:   "https://github.com/HarbourMasters/otrgui.git"
  branch:   "master"
  commit:   "a6066a251"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

OTRGui/libs/raylib/examples/models/models_loading.c

@@ -0,0 +1,146 @@
+/*******************************************************************************************
+*
+*   raylib [models] example - Models loading
+*
+*   raylib supports multiple models file formats:
+*
+*     - OBJ  > Text file format. Must include vertex position-texcoords-normals information,
+*              if files references some .mtl materials file, it will be loaded (or try to).
+*     - GLTF > Text/binary file format. Includes lot of information and it could
+*              also reference external files, raylib will try loading mesh and materials data.
+*     - IQM  > Binary file format. Includes mesh vertex data but also animation data,
+*              raylib can load .iqm animations.
+*     - VOX  > Binary file format. MagikaVoxel mesh format:
+*              https://github.com/ephtracy/voxel-model/blob/master/MagicaVoxel-file-format-vox.txt
+*
+*   This example has been created using raylib 4.0 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2014-2021 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [models] example - models loading");
+
+    // Define the camera to look into our 3d world
+    Camera camera = { 0 };
+    camera.position = (Vector3){ 50.0f, 50.0f, 50.0f }; // Camera position
+    camera.target = (Vector3){ 0.0f, 10.0f, 0.0f };     // Camera looking at point
+    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
+    camera.fovy = 45.0f;                                // Camera field-of-view Y
+    camera.projection = CAMERA_PERSPECTIVE;                   // Camera mode type
+
+    Model model = LoadModel("resources/models/obj/castle.obj");                 // Load model
+    Texture2D texture = LoadTexture("resources/models/obj/castle_diffuse.png"); // Load model texture
+    model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture;            // Set map diffuse texture
+
+    Vector3 position = { 0.0f, 0.0f, 0.0f };                    // Set model position
+
+    BoundingBox bounds = GetMeshBoundingBox(model.meshes[0]);   // Set model bounds
+
+    // NOTE: bounds are calculated from the original size of the model,
+    // if model is scaled on drawing, bounds must be also scaled
+
+    SetCameraMode(camera, CAMERA_FREE);     // Set a free camera mode
+
+    bool selected = false;          // Selected object flag
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        UpdateCamera(&camera);
+
+        // Load new models/textures on drag&drop
+        if (IsFileDropped())
+        {
+            int count = 0;
+            char **droppedFiles = GetDroppedFiles(&count);
+
+            if (count == 1) // Only support one file dropped
+            {
+                if (IsFileExtension(droppedFiles[0], ".obj") ||
+                    IsFileExtension(droppedFiles[0], ".gltf") ||
+                    IsFileExtension(droppedFiles[0], ".glb") ||
+                    IsFileExtension(droppedFiles[0], ".vox") ||
+                    IsFileExtension(droppedFiles[0], ".iqm"))       // Model file formats supported
+                {
+                    UnloadModel(model);                     // Unload previous model
+                    model = LoadModel(droppedFiles[0]);     // Load new model
+                    model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture; // Set current map diffuse texture
+
+                    bounds = GetMeshBoundingBox(model.meshes[0]);
+
+                    // TODO: Move camera position from target enough distance to visualize model properly
+                }
+                else if (IsFileExtension(droppedFiles[0], ".png"))  // Texture file formats supported
+                {
+                    // Unload current model texture and load new one
+                    UnloadTexture(texture);
+                    texture = LoadTexture(droppedFiles[0]);
+                    model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture;
+                }
+            }
+
+            ClearDroppedFiles();    // Clear internal buffers
+        }
+
+        // Select model on mouse click
+        if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
+        {
+            // Check collision between ray and box
+            if (GetRayCollisionBox(GetMouseRay(GetMousePosition(), camera), bounds).hit) selected = !selected;
+            else selected = false;
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            BeginMode3D(camera);
+
+                DrawModel(model, position, 1.0f, WHITE);        // Draw 3d model with texture
+
+                DrawGrid(20, 10.0f);         // Draw a grid
+
+                if (selected) DrawBoundingBox(bounds, GREEN);   // Draw selection box
+
+            EndMode3D();
+
+            DrawText("Drag & drop model to load mesh/texture.", 10, GetScreenHeight() - 20, 10, DARKGRAY);
+            if (selected) DrawText("MODEL SELECTED", GetScreenWidth() - 110, 10, 10, GREEN);
+
+            DrawText("(c) Castle 3D model by Alberto Cano", screenWidth - 200, screenHeight - 20, 10, GRAY);
+
+            DrawFPS(10, 10);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadTexture(texture);     // Unload texture
+    UnloadModel(model);         // Unload model
+
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}