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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327
Examples/Shapes/PenroseTile.cs
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Examples/Shapes/PenroseTile.cs
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/*******************************************************************************************
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*
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* raylib [shapes] example - penrose tile
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*
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* Example complexity rating: [★★★★] 4/4
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*
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* Example originally created with raylib 5.5, last time updated with raylib 6.0
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* Based on: https://processing.org/examples/penrosetile.html
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*
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* Example contributed by David Buzatto (@davidbuzatto) 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) 2025 David Buzatto (@davidbuzatto)
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*
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********************************************************************************************/
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using System.Text;
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namespace Examples.Shapes;
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public partial class PenroseTile : 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 / Penrose Tile";
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public string Title => "raylib [shapes] example - penrose tile";
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public ConfigFlags ConfigFlags => ConfigFlags.Msaa4xHint;
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public int TargetFps => 120;
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//----------------------------------------------------------------------------------
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// Types and Structures Definition
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//----------------------------------------------------------------------------------
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private struct TurtleState
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{
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public Vector2 origin;
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public float angle;
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}
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private class PenroseLSystem
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{
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public int steps;
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public StringBuilder production;
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public string ruleW;
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public string ruleX;
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public string ruleY;
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public string ruleZ;
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public float drawLength;
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public float theta;
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}
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//----------------------------------------------------------------------------------
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// Global Variables Definition
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//----------------------------------------------------------------------------------
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private Stack<TurtleState> turtleStack;
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private const float drawLength = 460.0f;
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private int minGenerations;
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private int maxGenerations;
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private int generations;
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private PenroseLSystem ls;
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public void Init()
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{
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turtleStack = new Stack<TurtleState>();
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minGenerations = 0;
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maxGenerations = 4;
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generations = 0;
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// Initialize new penrose tile
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ls = CreatePenroseLSystem(drawLength * (generations / (float)maxGenerations));
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for (int i = 0; i < generations; i++)
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{
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BuildProductionStep(ls);
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}
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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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bool rebuild = false;
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if (IsKeyPressed(KeyboardKey.Up))
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{
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if (generations < maxGenerations)
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{
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generations++;
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rebuild = true;
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}
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}
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else if (IsKeyPressed(KeyboardKey.Down))
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{
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if (generations > minGenerations)
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{
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generations--;
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if (generations > 0)
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{
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rebuild = true;
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}
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}
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}
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if (rebuild)
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{
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ls = CreatePenroseLSystem(drawLength * (generations / (float)maxGenerations));
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for (int i = 0; i < generations; i++)
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{
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BuildProductionStep(ls);
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}
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}
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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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if (generations > 0)
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{
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DrawPenroseLSystem(ls);
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}
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DrawText("penrose l-system", 10, 10, 20, Color.DarkGray);
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DrawText("press up or down to change generations", 10, 30, 20, Color.DarkGray);
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DrawText($"generations: {generations}", 10, 50, 20, Color.DarkGray);
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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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//----------------------------------------------------------------------------------
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// Module Functions Definition
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//----------------------------------------------------------------------------------
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// Push turtle state for next step
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private void PushTurtleState(TurtleState state)
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{
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turtleStack.Push(state);
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}
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// Pop turtle state step
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private TurtleState PopTurtleState()
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{
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if (turtleStack.Count > 0)
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{
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return turtleStack.Pop();
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}
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else
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{
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TraceLog(TraceLogLevel.Warning, "TURTLE STACK UNDERFLOW!");
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}
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return new TurtleState();
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}
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// Create a new penrose tile structure
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private static PenroseLSystem CreatePenroseLSystem(float drawLength)
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{
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PenroseLSystem ls = new PenroseLSystem
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{
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steps = 0,
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ruleW = "YF++ZF4-XF[-YF4-WF]++",
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ruleX = "+YF--ZF[3-WF--XF]+",
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ruleY = "-WF++XF[+++YF++ZF]-",
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ruleZ = "--YF++++WF[+ZF++++XF]--XF",
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drawLength = drawLength,
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theta = 36.0f // Degrees
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};
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ls.production = new StringBuilder("[X]++[X]++[X]++[X]++[X]");
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return ls;
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}
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// Build next penrose step
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private static void BuildProductionStep(PenroseLSystem ls)
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{
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StringBuilder newProduction = new StringBuilder();
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string production = ls.production.ToString();
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for (int i = 0; i < production.Length; i++)
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{
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char step = production[i];
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switch (step)
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{
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case 'W':
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newProduction.Append(ls.ruleW);
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break;
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case 'X':
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newProduction.Append(ls.ruleX);
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break;
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case 'Y':
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newProduction.Append(ls.ruleY);
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break;
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case 'Z':
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newProduction.Append(ls.ruleZ);
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break;
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default:
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{
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if (step != 'F')
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{
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newProduction.Append(step);
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}
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}
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break;
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}
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}
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ls.drawLength *= 0.5f;
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ls.production = newProduction;
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}
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// Draw penrose tile lines
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private void DrawPenroseLSystem(PenroseLSystem ls)
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{
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Vector2 screenCenter = new Vector2(GetScreenWidth() / 2.0f, GetScreenHeight() / 2.0f);
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TurtleState turtle = new TurtleState
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{
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origin = new Vector2(0, 0),
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angle = -90.0f
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};
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int repeats = 1;
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string production = ls.production.ToString();
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int productionLength = production.Length;
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ls.steps += 12;
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if (ls.steps > productionLength)
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{
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ls.steps = productionLength;
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}
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for (int i = 0; i < ls.steps; i++)
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{
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char step = production[i];
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if (step == 'F')
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{
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for (int j = 0; j < repeats; j++)
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{
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Vector2 startPosWorld = turtle.origin;
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float radAngle = DEG2RAD * turtle.angle;
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turtle.origin.X += ls.drawLength * MathF.Cos(radAngle);
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turtle.origin.Y += ls.drawLength * MathF.Sin(radAngle);
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Vector2 startPosScreen = new Vector2(startPosWorld.X + screenCenter.X, startPosWorld.Y + screenCenter.Y);
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Vector2 endPosScreen = new Vector2(turtle.origin.X + screenCenter.X, turtle.origin.Y + screenCenter.Y);
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DrawLineEx(startPosScreen, endPosScreen, 2, Fade(Color.Black, 0.2f));
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}
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repeats = 1;
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}
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else if (step == '+')
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{
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for (int j = 0; j < repeats; j++)
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{
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turtle.angle += ls.theta;
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}
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repeats = 1;
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}
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else if (step == '-')
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{
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for (int j = 0; j < repeats; j++)
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{
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turtle.angle += -ls.theta;
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}
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repeats = 1;
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}
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else if (step == '[')
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{
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PushTurtleState(turtle);
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}
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else if (step == ']')
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{
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turtle = PopTurtleState();
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}
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else if ((step >= 48) && (step <= 57))
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{
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repeats = (int)step - 48;
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}
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}
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turtleStack.Clear();
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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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SetConfigFlags(ConfigFlags.Msaa4xHint);
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InitWindow(screenWidth, screenHeight, "raylib [shapes] example - penrose tile");
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SetTargetFPS(120); // Set our game to run at 120 frames-per-second
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//---------------------------------------------------------------------------------------
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var game = new PenroseTile();
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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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