WASM examples (+ backports of new official examples) (#344)
* chg: New build system that uses the officially distributed binaries, bumped version to 8.0.0, simplified git workflow, removed deprecated OpenGL 1.1 functionality. * chg: Modernize CI workflow, enable SourceLink - Bump workflow actions to latest majors (Node 24); drop deprecated softprops/action-gh-release@v1 - Trigger push builds on main instead of master - Create local nuget feed dir before pack (fixes NU1301) - Enable Microsoft.SourceLink.GitHub for debugging symbols (ref PR #340) * fix: centralized version data in Directory.build.props, and fixed various interop details that had incorrect function signatures * chore: updated readme * fix: version the native extract marker and chain download via DependsOnTargets The .extracted marker now includes the raylib package name, so bumping TargetRaylibTag re-extracts the new archive instead of silently keeping (and packing/copying) the previous version's files. _PrepareNativeLibrary and _StageWasmNative now depend directly on _DownloadAndExtractInternal instead of CallTarget-ing it; dependency targets run in the same project instance, so the resolved properties (RaylibPackageName etc.) propagate naturally. * fix: let the binding build for browser-wasm on both net8.0 and net10.0 The net8-era wasm workload (Microsoft.NET.Runtime.WebAssembly.Sdk 8.0.x, auto-imported for RID browser-wasm) treats every browser-wasm project as a wasm app: it forces OutputType=Exe after project evaluation (CS5001 for a classlib) and hooks its app-bundle build after Build, which errors because a library has no assemblies to bundle. Opt Raylib-cs out via DisableAutoWasmBuildApp (props time, before the workload defaults its trigger) and pin OutputType back to Library in Directory.Build.targets (evaluated after the workload props, so the assignment wins). net10's wasm SDK needs neither workaround. * chore: readme updated * chg: simplifying build logic - a simple line in the documentation should save us the code here * fix: Wrong signature of FrameBufferComplete * chore: readme update * feat: samples default to local project reference, and can optionally use the nuget package * feat: backporting existing raylib-cs examples and new official raylib examples to WASM, adopting raylib's original code style * chore: readme, gitignore, and targets backport. * fix: Examples.csproj runs the download task when building locally * feat: backporting existing raylib-cs examples and new official raylib examples to WASM, adopting raylib's original code style * chore: readme, gitignore, and targets backport. * chore: clean up linter warnings * feat: html harness focuses the example and allows quick navigation with J/K instead. * chore: readme mentions the property to use nuget vs. the local project reference * feat: replaced the J/K navigation with good old HTML buttons * chore: run dotnet format scoped default (was previously scoped to just 'style')
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191
Examples/Shapes/EllipseCollision.cs
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Examples/Shapes/EllipseCollision.cs
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/*******************************************************************************************
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*
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* raylib [shapes] example - ellipse collision
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*
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* Example complexity rating: [★★☆☆] 2/4
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*
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* Example originally created with raylib 5.5, last time updated with raylib 5.5
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*
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* Example contributed by Ziya (@Monjaris)
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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) 2025 Ziya (@Monjaris)
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*
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********************************************************************************************/
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namespace Examples.Shapes;
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public partial class EllipseCollision : IExample
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{
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private const int screenWidth = 800;
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private const int screenHeight = 450;
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public string Name => "Shapes / Ellipse Collision";
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public string Title => "raylib [shapes] example - collision ellipses";
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private Vector2 ellipseACenter;
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private float ellipseARx;
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private float ellipseARy;
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private Vector2 ellipseBCenter;
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private float ellipseBRx;
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private float ellipseBRy;
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// 0 = controlling A, 1 = controlling B
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private int controlled;
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// Check if point is inside ellipse
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private static bool CheckCollisionPointEllipse(Vector2 point, Vector2 center, float rx, float ry)
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{
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float dx = (point.X - center.X) / rx;
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float dy = (point.Y - center.Y) / ry;
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return (dx * dx + dy * dy) <= 1.0f;
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}
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// Check if two ellipses collide
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// Uses radial boundary distance in the direction between centers — scales correctly with radii
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private static bool CheckCollisionEllipses(Vector2 c1, float rx1, float ry1, Vector2 c2, float rx2, float ry2)
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{
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float dx = c2.X - c1.X;
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float dy = c2.Y - c1.Y;
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float dist = MathF.Sqrt(dx * dx + dy * dy);
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// Ellipses are on top of each other
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if (dist == 0.0f)
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{
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return true;
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}
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float theta = MathF.Atan2(dy, dx);
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float cosT = MathF.Cos(theta);
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float sinT = MathF.Sin(theta);
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// Radial distance from center to ellipse boundary in direction theta
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// r(theta) = (rx * ry) / sqrt((ry*cos)^2 + (rx*sin)^2)
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float r1 = (rx1 * ry1) / MathF.Sqrt((ry1 * cosT) * (ry1 * cosT) + (rx1 * sinT) * (rx1 * sinT));
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float r2 = (rx2 * ry2) / MathF.Sqrt((ry2 * cosT) * (ry2 * cosT) + (rx2 * sinT) * (rx2 * sinT));
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return dist <= (r1 + r2);
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}
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public void Init()
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{
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ellipseACenter = new((float)screenWidth / 4, (float)screenHeight / 2);
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ellipseARx = 120.0f;
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ellipseARy = 70.0f;
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ellipseBCenter = new((float)screenWidth * 3 / 4, (float)screenHeight / 2);
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ellipseBRx = 90.0f;
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ellipseBRy = 140.0f;
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// 0 = controlling A, 1 = controlling B
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controlled = 0;
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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 (IsKeyPressed(KeyboardKey.A))
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{
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controlled = 0;
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}
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if (IsKeyPressed(KeyboardKey.B))
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{
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controlled = 1;
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}
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if (controlled == 0)
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{
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ellipseACenter = GetMousePosition();
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}
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else
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{
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ellipseBCenter = GetMousePosition();
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}
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bool ellipsesCollide = CheckCollisionEllipses(
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ellipseACenter, ellipseARx, ellipseARy,
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ellipseBCenter, ellipseBRx, ellipseBRy
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);
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bool mouseInA = CheckCollisionPointEllipse(GetMousePosition(), ellipseACenter, ellipseARx, ellipseARy);
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bool mouseInB = CheckCollisionPointEllipse(GetMousePosition(), ellipseBCenter, ellipseBRx, ellipseBRy);
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(Color.RayWhite);
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DrawEllipse((int)ellipseACenter.X, (int)ellipseACenter.Y, ellipseARx, ellipseARy, ellipsesCollide ? Color.Red : Color.Blue);
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DrawEllipse((int)ellipseBCenter.X, (int)ellipseBCenter.Y, ellipseBRx, ellipseBRy, ellipsesCollide ? Color.Red : Color.Green);
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DrawEllipseLines((int)ellipseACenter.X, (int)ellipseACenter.Y, ellipseARx, ellipseARy, Color.White);
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DrawEllipseLines((int)ellipseBCenter.X, (int)ellipseBCenter.Y, ellipseBRx, ellipseBRy, Color.White);
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DrawCircleV(ellipseACenter, 4, Color.White);
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DrawCircleV(ellipseBCenter, 4, Color.White);
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if (ellipsesCollide)
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{
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DrawText("ELLIPSES COLLIDE", screenWidth / 2 - 120, 40, 28, Color.Red);
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}
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else
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{
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DrawText("NO COLLISION", screenWidth / 2 - 80, 40, 28, Color.DarkGray);
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}
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DrawText(controlled == 0 ? "Controlling: A" : "Controlling: B", 20, screenHeight - 40, 20, Color.Yellow);
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if (mouseInA && controlled != 0)
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{
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DrawText("Mouse inside ellipse A", 20, screenHeight - 70, 20, Color.Blue);
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}
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if (mouseInB && controlled != 1)
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{
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DrawText("Mouse inside ellipse B", 20, screenHeight - 70, 20, Color.Green);
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}
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DrawText("Press [A] or [B] to switch control", 20, 20, 20, Color.Gray);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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public void Unload()
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{
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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 [shapes] example - collision ellipses");
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SetTargetFPS(60);
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var game = new EllipseCollision();
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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();
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//--------------------------------------------------------------------------------------
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return 0;
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}
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}
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