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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145
Examples/Models/DirectionalBillboard.cs
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Examples/Models/DirectionalBillboard.cs
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/*******************************************************************************************
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*
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* raylib [models] example - directional billboard
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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 6.0, last time updated with raylib 6.0
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*
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* Example contributed by Robin (@RobinsAviary) 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 Robin (@RobinsAviary)
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* Killbot art by patvanmackelberg https://opengameart.org/content/killbot-8-directional under CC0
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*
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********************************************************************************************/
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using static Raylib_cs.Raymath;
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namespace Examples.Models;
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public partial class DirectionalBillboard : 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 => "Models / Directional Billboard";
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public string Title => "raylib [models] example - directional billboard";
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private Camera3D camera;
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private Texture2D skillbot;
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private float animTimer;
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private uint anim;
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public void Init()
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{
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// Set up the camera
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camera = new();
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camera.Position = new Vector3(2.0f, 1.0f, 2.0f); // Starting position
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camera.Target = new Vector3(0.0f, 0.5f, 0.0f); // Target position
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camera.Up = new Vector3(0.0f, 1.0f, 0.0f); // Up vector
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camera.FovY = 45.0f; // FOV
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camera.Projection = CameraProjection.Perspective; // Projection type (Standard 3D perspective)
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// Load billboard texture
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skillbot = LoadTexture("resources/skillbot.png");
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// Timer to update animation
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animTimer = 0.0f;
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// Animation frame
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anim = 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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UpdateCamera(ref camera, CameraMode.Orbital);
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// Update timer with delta time
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animTimer += GetFrameTime();
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// Update frame index after a certain amount of time (half a second)
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if (animTimer > 0.5f)
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{
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animTimer = 0.0f;
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anim += 1;
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}
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// Reset frame index to zero on overflow
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if (anim >= 4)
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{
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anim = 0;
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}
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// Find the current direction frame based on the camera position to the billboard object
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var dir = (float)Math.Floor(((Vector2Angle(new Vector2(2.0f, 0.0f), new Vector2(camera.Position.X, camera.Position.Z)) / MathF.PI) * 4.0f) + 0.25f);
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// Correct frame index if angle is negative
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if (dir < 0.0f)
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{
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dir = 8.0f - Math.Abs((int)dir);
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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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BeginMode3D(camera);
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DrawGrid(10, 1.0f);
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// Draw billboard pointing straight up to the sky, rotated relative to the camera and offset from the bottom
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DrawBillboardPro(camera, skillbot, new Rectangle(0.0f + (anim * 24.0f), 0.0f + (dir * 24.0f), 24.0f, 24.0f),
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Vector3.Zero, new Vector3(0.0f, 1.0f, 0.0f), Vector2.One, new Vector2(0.5f, 0.0f), 0, Color.White);
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EndMode3D();
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// Render various variables for reference
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DrawText($"animation: {anim}", 10, 10, 20, Color.DarkGray);
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DrawText($"direction frame: {dir:0}", 10, 40, 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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// Unload billboard texture
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UnloadTexture(skillbot);
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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 [models] example - directional billboard");
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SetTargetFPS(60);
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//--------------------------------------------------------------------------------------
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var game = new DirectionalBillboard();
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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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