feat: backporting existing raylib-cs examples and new official raylib examples to WASM, adopting raylib's original code style

Examples/Textures/SpriteStacking.cs

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+/*******************************************************************************************
+*
+*   raylib [textures] example - sprite stacking
+*
+*   Example complexity rating: [★★☆☆] 2/4
+*
+*   Example originally created with raylib 6.0, last time updated with raylib 6.0
+*
+*   Example contributed by Robin (@RobinsAviary) 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
+*
+*   Redbooth model (c) 2017-2025 @kluchek under https://creativecommons.org/licenses/by/4.0/ https://github.com/kluchek/vox-models/
+*   Copyright (c) 2025 Robin (@RobinsAviary)
+*
+********************************************************************************************/
+
+using System.Numerics;
+using static Raylib_cs.Raylib;
+
+namespace Examples.Textures;
+
+public partial class SpriteStacking : IExample
+{
+    private const int screenWidth = 800;
+    private const int screenHeight = 450;
+
+    private const float speedChange = 0.25f; // Amount speed will change by when the user presses A/D
+
+    public string Name => "Textures / Sprite Stacking";
+
+    public string Title => "raylib [textures] example - sprite stacking";
+
+    private Texture2D booth;
+    private float stackScale;    // Overall scale of the stacked sprite
+    private float stackSpacing;  // Vertical spacing between each layer
+    private uint stackCount;     // Number of layers, used for calculating the size of a single slice
+    private float rotationSpeed; // Stacked sprites rotation speed
+    private float rotation;      // Current rotation of the stacked sprite
+
+    public void Init()
+    {
+        booth = LoadTexture("resources/booth.png");
+
+        stackScale = 3.0f;
+        stackSpacing = 2.0f;
+        stackCount = 122;
+        rotationSpeed = 30.0f;
+        rotation = 0.0f;
+    }
+
+    public void Update()
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // Use mouse wheel to affect stack separation
+        stackSpacing += GetMouseWheelMove() * 0.1f;
+        stackSpacing = Math.Clamp(stackSpacing, 0.0f, 5.0f);
+
+        // Add a positive/negative offset to spin right/left at different speeds
+        if (IsKeyDown(KeyboardKey.Left) || IsKeyDown(KeyboardKey.A))
+        {
+            rotationSpeed -= speedChange;
+        }
+        if (IsKeyDown(KeyboardKey.Right) || IsKeyDown(KeyboardKey.D))
+        {
+            rotationSpeed += speedChange;
+        }
+
+        rotation += rotationSpeed * GetFrameTime();
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+        ClearBackground(Color.RayWhite);
+
+        // Get the size of a single slice
+        var frameWidth = (float)booth.Width;
+        var frameHeight = (float)booth.Height / (float)stackCount;
+
+        // Get the scaled resolution to draw at
+        var scaledWidth = frameWidth * stackScale;
+        var scaledHeight = frameHeight * stackScale;
+
+        // Draw the stacked sprite, rotated to the correct angle, with an vertical offset applied based on its y location
+        for (var i = (int)stackCount - 1; i >= 0; i--)
+        {
+            // Center vertically
+            Rectangle source = new(0.0f, (float)i * frameHeight, frameWidth, frameHeight);
+            Rectangle dest = new(screenWidth / 2.0f, (screenHeight / 2.0f) + (i * stackSpacing) - (stackSpacing * stackCount / 2.0f), scaledWidth, scaledHeight);
+            Vector2 origin = new(scaledWidth / 2.0f, scaledHeight / 2.0f);
+
+            DrawTexturePro(booth, source, dest, origin, rotation, Color.White);
+        }
+
+        DrawText("A/D to spin\nmouse wheel to change separation (aka 'angle')", 10, 10, 20, Color.DarkGray);
+        DrawText($"current spacing: {stackSpacing:F1}", 10, 50, 20, Color.DarkGray);
+        DrawText($"current speed: {rotationSpeed:F2}", 10, 70, 20, Color.DarkGray);
+        DrawText("redbooth model (c) kluchek under cc 4.0", 10, 420, 20, Color.DarkGray);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    public void Unload()
+    {
+        UnloadTexture(booth);
+    }
+
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        InitWindow(screenWidth, screenHeight, "raylib [textures] example - sprite stacking");
+
+        SetTargetFPS(60);
+        //--------------------------------------------------------------------------------------
+
+        var game = new SpriteStacking();
+        game.Init();
+
+        // Main game loop
+        while (!WindowShouldClose())    // Detect window close button or ESC key
+        {
+            game.Update();
+        }
+
+        game.Unload();
+
+        // De-Initialization
+        //--------------------------------------------------------------------------------------
+        CloseWindow();                // Close window and OpenGL context
+        //--------------------------------------------------------------------------------------
+
+        return 0;
+    }
+}