feat: backporting existing raylib-cs examples and new official raylib examples to WASM, adopting raylib's original code style
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204
Examples/Core/SplitScreen2D.cs
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Examples/Core/SplitScreen2D.cs
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/*******************************************************************************************
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*
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* raylib [core] example - 2d camera split screen
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*
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* Example complexity rating: [★★★★] 4/4
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*
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* Addapted from the core_3d_camera_split_screen example:
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* https://github.com/raysan5/raylib/blob/master/examples/core/core_3d_camera_split_screen.c
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*
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* Example originally created with raylib 4.5, last time updated with raylib 4.5
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*
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* Example contributed by Gabriel dos Santos Sanches (@gabrielssanches) and reviewed by Ramon Santamaria (@raysan5)
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2023-2025 Gabriel dos Santos Sanches (@gabrielssanches)
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*
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********************************************************************************************/
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using System.Numerics;
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using static Raylib_cs.Raylib;
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namespace Examples.Core;
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public partial class SplitScreen2D : IExample
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{
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private const int PLAYER_SIZE = 40;
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private const int screenWidth = 800;
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private const int screenHeight = 440;
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public string Name => "Core / 2D Camera Split Screen";
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public string Title => "raylib [core] example - 2d camera split screen";
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public int Width => screenWidth;
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public int Height => screenHeight;
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private Rectangle player1;
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private Rectangle player2;
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private Camera2D camera1;
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private Camera2D camera2;
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private RenderTexture2D screenCamera1;
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private RenderTexture2D screenCamera2;
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private Rectangle splitScreenRect;
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public void Init()
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{
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player1 = new Rectangle(200, 200, PLAYER_SIZE, PLAYER_SIZE);
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player2 = new Rectangle(250, 200, PLAYER_SIZE, PLAYER_SIZE);
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camera1 = new Camera2D();
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camera1.Target = new Vector2(player1.X, player1.Y);
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camera1.Offset = new Vector2(200.0f, 200.0f);
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camera1.Rotation = 0.0f;
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camera1.Zoom = 1.0f;
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camera2 = new Camera2D();
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camera2.Target = new Vector2(player2.X, player2.Y);
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camera2.Offset = new Vector2(200.0f, 200.0f);
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camera2.Rotation = 0.0f;
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camera2.Zoom = 1.0f;
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screenCamera1 = LoadRenderTexture(screenWidth / 2, screenHeight);
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screenCamera2 = LoadRenderTexture(screenWidth / 2, screenHeight);
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// Build a flipped rectangle the size of the split view to use for drawing later
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splitScreenRect = new Rectangle(0.0f, 0.0f, (float)screenCamera1.Texture.Width, (float)-screenCamera1.Texture.Height);
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}
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public void Update()
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{
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// Update
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//----------------------------------------------------------------------------------
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if (IsKeyDown(KeyboardKey.S)) player1.Y += 3.0f;
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else if (IsKeyDown(KeyboardKey.W)) player1.Y -= 3.0f;
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if (IsKeyDown(KeyboardKey.D)) player1.X += 3.0f;
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else if (IsKeyDown(KeyboardKey.A)) player1.X -= 3.0f;
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if (IsKeyDown(KeyboardKey.Up)) player2.Y -= 3.0f;
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else if (IsKeyDown(KeyboardKey.Down)) player2.Y += 3.0f;
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if (IsKeyDown(KeyboardKey.Right)) player2.X += 3.0f;
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else if (IsKeyDown(KeyboardKey.Left)) player2.X -= 3.0f;
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camera1.Target = new Vector2(player1.X, player1.Y);
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camera2.Target = new Vector2(player2.X, player2.Y);
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginTextureMode(screenCamera1);
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ClearBackground(Color.RayWhite);
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BeginMode2D(camera1);
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// Draw full scene with first camera
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for (int i = 0; i < screenWidth / PLAYER_SIZE + 1; i++)
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{
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DrawLineV(new Vector2((float)PLAYER_SIZE * i, 0), new Vector2((float)PLAYER_SIZE * i, (float)screenHeight), Color.LightGray);
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}
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for (int i = 0; i < screenHeight / PLAYER_SIZE + 1; i++)
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{
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DrawLineV(new Vector2(0, (float)PLAYER_SIZE * i), new Vector2((float)screenWidth, (float)PLAYER_SIZE * i), Color.LightGray);
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}
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for (int i = 0; i < screenWidth / PLAYER_SIZE; i++)
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{
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for (int j = 0; j < screenHeight / PLAYER_SIZE; j++)
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{
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DrawText($"[{i},{j}]", 10 + PLAYER_SIZE * i, 15 + PLAYER_SIZE * j, 10, Color.LightGray);
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}
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}
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DrawRectangleRec(player1, Color.Red);
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DrawRectangleRec(player2, Color.Blue);
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EndMode2D();
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DrawRectangle(0, 0, GetScreenWidth() / 2, 30, Fade(Color.RayWhite, 0.6f));
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DrawText("PLAYER1: W/S/A/D to move", 10, 10, 10, Color.Maroon);
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EndTextureMode();
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BeginTextureMode(screenCamera2);
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ClearBackground(Color.RayWhite);
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BeginMode2D(camera2);
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// Draw full scene with second camera
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for (int i = 0; i < screenWidth / PLAYER_SIZE + 1; i++)
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{
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DrawLineV(new Vector2((float)PLAYER_SIZE * i, 0), new Vector2((float)PLAYER_SIZE * i, (float)screenHeight), Color.LightGray);
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}
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for (int i = 0; i < screenHeight / PLAYER_SIZE + 1; i++)
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{
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DrawLineV(new Vector2(0, (float)PLAYER_SIZE * i), new Vector2((float)screenWidth, (float)PLAYER_SIZE * i), Color.LightGray);
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}
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for (int i = 0; i < screenWidth / PLAYER_SIZE; i++)
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{
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for (int j = 0; j < screenHeight / PLAYER_SIZE; j++)
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{
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DrawText($"[{i},{j}]", 10 + PLAYER_SIZE * i, 15 + PLAYER_SIZE * j, 10, Color.LightGray);
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}
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}
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DrawRectangleRec(player1, Color.Red);
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DrawRectangleRec(player2, Color.Blue);
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EndMode2D();
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DrawRectangle(0, 0, GetScreenWidth() / 2, 30, Fade(Color.RayWhite, 0.6f));
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DrawText("PLAYER2: UP/DOWN/LEFT/RIGHT to move", 10, 10, 10, Color.DarkBlue);
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EndTextureMode();
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// Draw both views render textures to the screen side by side
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BeginDrawing();
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ClearBackground(Color.Black);
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DrawTextureRec(screenCamera1.Texture, splitScreenRect, new Vector2(0, 0), Color.White);
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DrawTextureRec(screenCamera2.Texture, splitScreenRect, new Vector2(screenWidth / 2.0f, 0), Color.White);
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DrawRectangle(GetScreenWidth() / 2 - 2, 0, 4, GetScreenHeight(), Color.LightGray);
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EndDrawing();
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}
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public void Unload()
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{
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UnloadRenderTexture(screenCamera1); // Unload render texture
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UnloadRenderTexture(screenCamera2); // Unload render texture
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}
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public static int Main()
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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InitWindow(screenWidth, screenHeight, "raylib [core] example - 2d camera split screen");
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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var game = new SplitScreen2D();
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game.Init();
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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game.Update();
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}
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game.Unload();
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// De-Initialization
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//--------------------------------------------------------------------------------------
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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}
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