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_first_person_maze.c

@@ -0,0 +1,122 @@
+/*******************************************************************************************
+*
+*   raylib [models] example - first person maze
+*
+*   This example has been created using raylib 2.5 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2019 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include <stdlib.h>           // Required for: free()
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [models] example - first person maze");
+
+    // Define the camera to look into our 3d world
+    Camera camera = { { 0.2f, 0.4f, 0.2f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f, 0 };
+
+    Image imMap = LoadImage("resources/cubicmap.png");      // Load cubicmap image (RAM)
+    Texture2D cubicmap = LoadTextureFromImage(imMap);       // Convert image to texture to display (VRAM)
+    Mesh mesh = GenMeshCubicmap(imMap, (Vector3){ 1.0f, 1.0f, 1.0f });
+    Model model = LoadModelFromMesh(mesh);
+
+    // NOTE: By default each cube is mapped to one part of texture atlas
+    Texture2D texture = LoadTexture("resources/cubicmap_atlas.png");    // Load map texture
+    model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture;             // Set map diffuse texture
+
+    // Get map image data to be used for collision detection
+    Color *mapPixels = LoadImageColors(imMap);
+    UnloadImage(imMap);             // Unload image from RAM
+
+    Vector3 mapPosition = { -16.0f, 0.0f, -8.0f };  // Set model position
+
+    SetCameraMode(camera, CAMERA_FIRST_PERSON);     // Set camera mode
+
+    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
+        //----------------------------------------------------------------------------------
+        Vector3 oldCamPos = camera.position;    // Store old camera position
+
+        UpdateCamera(&camera);      // Update camera
+
+        // Check player collision (we simplify to 2D collision detection)
+        Vector2 playerPos = { camera.position.x, camera.position.z };
+        float playerRadius = 0.1f;  // Collision radius (player is modelled as a cilinder for collision)
+
+        int playerCellX = (int)(playerPos.x - mapPosition.x + 0.5f);
+        int playerCellY = (int)(playerPos.y - mapPosition.z + 0.5f);
+
+        // Out-of-limits security check
+        if (playerCellX < 0) playerCellX = 0;
+        else if (playerCellX >= cubicmap.width) playerCellX = cubicmap.width - 1;
+
+        if (playerCellY < 0) playerCellY = 0;
+        else if (playerCellY >= cubicmap.height) playerCellY = cubicmap.height - 1;
+
+        // Check map collisions using image data and player position
+        // TODO: Improvement: Just check player surrounding cells for collision
+        for (int y = 0; y < cubicmap.height; y++)
+        {
+            for (int x = 0; x < cubicmap.width; x++)
+            {
+                if ((mapPixels[y*cubicmap.width + x].r == 255) &&       // Collision: white pixel, only check R channel
+                    (CheckCollisionCircleRec(playerPos, playerRadius,
+                    (Rectangle){ mapPosition.x - 0.5f + x*1.0f, mapPosition.z - 0.5f + y*1.0f, 1.0f, 1.0f })))
+                {
+                    // Collision detected, reset camera position
+                    camera.position = oldCamPos;
+                }
+            }
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            BeginMode3D(camera);
+                DrawModel(model, mapPosition, 1.0f, WHITE);                     // Draw maze map
+            EndMode3D();
+
+            DrawTextureEx(cubicmap, (Vector2){ GetScreenWidth() - cubicmap.width*4.0f - 20, 20.0f }, 0.0f, 4.0f, WHITE);
+            DrawRectangleLines(GetScreenWidth() - cubicmap.width*4 - 20, 20, cubicmap.width*4, cubicmap.height*4, GREEN);
+
+            // Draw player position radar
+            DrawRectangle(GetScreenWidth() - cubicmap.width*4 - 20 + playerCellX*4, 20 + playerCellY*4, 4, 4, RED);
+
+            DrawFPS(10, 10);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadImageColors(mapPixels);   // Unload color array
+
+    UnloadTexture(cubicmap);        // Unload cubicmap texture
+    UnloadTexture(texture);         // Unload map texture
+    UnloadModel(model);             // Unload map model
+
+    CloseWindow();                  // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}