Separate engine and game

engine/libs/raylib-4.5.0/examples/models/models_loading_vox.c

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+/*******************************************************************************************
+*
+*   raylib [models] example - Load models vox (MagicaVoxel)
+*
+*   Example originally created with raylib 4.0, last time updated with raylib 4.0
+*
+*   Example contributed by Johann Nadalutti (@procfxgen) and reviewed by Ramon Santamaria (@raysan5)
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2021-2023 Johann Nadalutti (@procfxgen) and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include "raymath.h"        // Required for: MatrixTranslate()
+
+#define MAX_VOX_FILES  3
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    const char *voxFileNames[] = {
+        "resources/models/vox/chr_knight.vox",
+        "resources/models/vox/chr_sword.vox",
+        "resources/models/vox/monu9.vox"
+    };
+
+    InitWindow(screenWidth, screenHeight, "raylib [models] example - magicavoxel loading");
+
+    // Define the camera to look into our 3d world
+    Camera camera = { 0 };
+    camera.position = (Vector3){ 10.0f, 10.0f, 10.0f }; // Camera position
+    camera.target = (Vector3){ 0.0f, 0.0f, 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 projection type
+
+    // Load MagicaVoxel files
+    Model models[MAX_VOX_FILES] = { 0 };
+
+    for (int i = 0; i < MAX_VOX_FILES; i++)
+    {
+        // Load VOX file and measure time
+        double t0 = GetTime()*1000.0;
+        models[i] = LoadModel(voxFileNames[i]);
+        double t1 = GetTime()*1000.0;
+
+        TraceLog(LOG_WARNING, TextFormat("[%s] File loaded in %.3f ms", voxFileNames[i], t1 - t0));
+
+        // Compute model translation matrix to center model on draw position (0, 0 , 0)
+        BoundingBox bb = GetModelBoundingBox(models[i]);
+        Vector3 center = { 0 };
+        center.x = bb.min.x  + (((bb.max.x - bb.min.x)/2));
+        center.z = bb.min.z  + (((bb.max.z - bb.min.z)/2));
+
+        Matrix matTranslate = MatrixTranslate(-center.x, 0, -center.z);
+        models[i].transform = matTranslate;
+    }
+
+    int currentModel = 0;
+
+    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, CAMERA_ORBITAL);
+
+        // Cycle between models on mouse click
+        if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) currentModel = (currentModel + 1)%MAX_VOX_FILES;
+
+        // Cycle between models on key pressed
+        if (IsKeyPressed(KEY_RIGHT))
+        {
+            currentModel++;
+            if (currentModel >= MAX_VOX_FILES) currentModel = 0;
+        }
+        else if (IsKeyPressed(KEY_LEFT))
+        {
+            currentModel--;
+            if (currentModel < 0) currentModel = MAX_VOX_FILES - 1;
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            // Draw 3D model
+            BeginMode3D(camera);
+
+                DrawModel(models[currentModel], (Vector3){ 0, 0, 0 }, 1.0f, WHITE);
+                DrawGrid(10, 1.0);
+
+            EndMode3D();
+
+            // Display info
+            DrawRectangle(10, 400, 310, 30, Fade(SKYBLUE, 0.5f));
+            DrawRectangleLines(10, 400, 310, 30, Fade(DARKBLUE, 0.5f));
+            DrawText("MOUSE LEFT BUTTON to CYCLE VOX MODELS", 40, 410, 10, BLUE);
+            DrawText(TextFormat("File: %s", GetFileName(voxFileNames[currentModel])), 10, 10, 20, GRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    // Unload models data (GPU VRAM)
+    for (int i = 0; i < MAX_VOX_FILES; i++) UnloadModel(models[i]);
+
+    CloseWindow();          // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+