Update/merge examples back into main repo (#192)

Examples/Models/HeightmapDemo.cs

@@ -0,0 +1,92 @@
+/*******************************************************************************************
+*
+*   raylib [models] example - Heightmap loading and drawing
+*
+*   This example has been created using raylib 1.8 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+using System.Numerics;
+using static Raylib_cs.Raylib;
+
+namespace Examples.Models;
+
+public class HeightmapDemo
+{
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        const int screenWidth = 800;
+        const int screenHeight = 450;
+
+        InitWindow(screenWidth, screenHeight, "raylib [models] example - heightmap loading and drawing");
+
+        // Define our custom camera to look into our 3d world
+        Camera3D camera = new();
+        camera.Position = new Vector3(18.0f, 16.0f, 18.0f);
+        camera.Target = new Vector3(0.0f, 0.0f, 0.0f);
+        camera.Up = new Vector3(0.0f, 1.0f, 0.0f);
+        camera.FovY = 45.0f;
+        camera.Projection = CameraProjection.CAMERA_PERSPECTIVE;
+
+        Image image = LoadImage("resources/heightmap.png");
+        Texture2D texture = LoadTextureFromImage(image);
+
+        Mesh mesh = GenMeshHeightmap(image, new Vector3(16, 8, 16));
+        Model model = LoadModelFromMesh(mesh);
+
+        // Set map diffuse texture
+        Raylib.SetMaterialTexture(ref model, 0, MaterialMapIndex.MATERIAL_MAP_ALBEDO, ref texture);
+
+        Vector3 mapPosition = new(-8.0f, 0.0f, -8.0f);
+
+        UnloadImage(image);
+
+        SetTargetFPS(60);
+        //--------------------------------------------------------------------------------------
+
+        // Main game loop
+        while (!WindowShouldClose())
+        {
+            // Update
+            //----------------------------------------------------------------------------------
+            UpdateCamera(ref camera, CameraMode.CAMERA_ORBITAL);
+            //----------------------------------------------------------------------------------
+
+            // Draw
+            //----------------------------------------------------------------------------------
+            BeginDrawing();
+            ClearBackground(Color.RAYWHITE);
+
+            BeginMode3D(camera);
+
+            DrawModel(model, mapPosition, 1.0f, Color.RED);
+
+            DrawGrid(20, 1.0f);
+
+            EndMode3D();
+
+            DrawTexture(texture, screenWidth - texture.Width - 20, 20, Color.WHITE);
+            DrawRectangleLines(screenWidth - texture.Width - 20, 20, texture.Width, texture.Height, Color.GREEN);
+
+            DrawFPS(10, 10);
+
+            EndDrawing();
+            //----------------------------------------------------------------------------------
+        }
+
+        // De-Initialization
+        //--------------------------------------------------------------------------------------
+        UnloadTexture(texture);
+        UnloadModel(model);
+
+        CloseWindow();
+        //--------------------------------------------------------------------------------------
+
+        return 0;
+    }
+}