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WASM examples (+ backports of new official examples) (#344)

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* 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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Examples/Shapes/BallPhysics.cs Normal file
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/*******************************************************************************************
*
* raylib [shapes] example - ball physics
*
* Example complexity rating: [★★☆☆] 2/4
*
* Example originally created with raylib 6.0, last time updated with raylib 6.0
*
* Example contributed by David Buzatto (@davidbuzatto) 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
*
* Copyright (c) 2025 David Buzatto (@davidbuzatto)
*
********************************************************************************************/
using static Raylib_cs.Raymath;
namespace Examples.Shapes;
public partial class BallPhysics : IExample
{
private const int screenWidth = 800;
private const int screenHeight = 450;
private const int MAX_BALLS = 5000; // Maximum quantity of balls
public string Name => "Shapes / Ball Physics";
public string Title => "raylib [shapes] example - ball physics";
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
// Ball data type
private struct Ball
{
public Vector2 position;
public Vector2 speed;
public Vector2 prevPosition;
public float radius;
public float friction;
public float elasticity;
public Color color;
public bool grabbed;
}
private Ball[] balls;
private int ballCount;
private int grabbedBallIndex; // Index of the current ball that is grabbed (-1 if none)
private Vector2 pressOffset; // Mouse press offset relative to the ball that grabbedd
private float gravity; // World gravity
private Vector2 windowPosition;
public void Init()
{
balls = new Ball[MAX_BALLS];
// Init first ball in the array
balls[0] = new Ball
{
position = new Vector2(GetScreenWidth() / 2.0f, GetScreenHeight() / 2.0f),
speed = new Vector2(200, 200),
prevPosition = new Vector2(0, 0),
radius = 40,
friction = 0.99f,
elasticity = 0.9f,
color = Color.Blue,
grabbed = false
};
ballCount = 1;
grabbedBallIndex = -1; // A reference to the current ball that is grabbed
pressOffset = new Vector2(0, 0); // Mouse press offset relative to the ball that grabbedd
gravity = 100; // World gravity
windowPosition = GetWindowPosition();
}
public void Update()
{
// Update
//----------------------------------------------------------------------------------
float delta = GetFrameTime();
Vector2 mousePos = GetMousePosition();
// Checks if a ball was grabbed
if (IsMouseButtonPressed(MouseButton.Left))
{
for (int i = ballCount - 1; i >= 0; i--)
{
pressOffset.X = mousePos.X - balls[i].position.X;
pressOffset.Y = mousePos.Y - balls[i].position.Y;
// If the distance between the ball position and the mouse press position
// is less than or equal to the ball radius, the event occurred inside the ball
if (MathF.Sqrt(pressOffset.X * pressOffset.X + pressOffset.Y * pressOffset.Y) <= balls[i].radius)
{
balls[i].grabbed = true;
grabbedBallIndex = i;
break;
}
}
}
// Releases any ball the was grabbed
if (IsMouseButtonReleased(MouseButton.Left))
{
if (grabbedBallIndex != -1)
{
balls[grabbedBallIndex].grabbed = false;
grabbedBallIndex = -1;
}
}
// Creates a new ball
if (IsMouseButtonPressed(MouseButton.Right) || (IsKeyDown(KeyboardKey.LeftControl) && IsMouseButtonDown(MouseButton.Right)))
{
if (ballCount < MAX_BALLS)
{
balls[ballCount++] = new Ball
{
position = mousePos,
speed = new Vector2(GetRandomValue(-300, 300), GetRandomValue(-300, 300)),
prevPosition = new Vector2(0, 0),
radius = 20.0f + GetRandomValue(0, 30),
friction = 0.99f,
elasticity = 0.9f,
color = new Color(GetRandomValue(0, 255), GetRandomValue(0, 255), GetRandomValue(0, 255), 255),
grabbed = false
};
}
}
// Get window position change for shaking
Vector2 windowPositionDelta = Vector2Subtract(windowPosition, GetWindowPosition());
if (Vector2Length(windowPositionDelta) > 5.0f)
{
for (int i = 0; i < ballCount; i++)
{
if (!balls[i].grabbed)
{
balls[i].speed = Vector2Add(balls[i].speed, Vector2Scale(windowPositionDelta, 10.0f));
}
}
}
// Shake balls
if (IsMouseButtonPressed(MouseButton.Middle))
{
for (int i = 0; i < ballCount; i++)
{
if (!balls[i].grabbed)
{
balls[i].speed = new Vector2(GetRandomValue(-2000, 2000), GetRandomValue(-2000, 2000));
}
}
}
// Changes gravity
gravity += GetMouseWheelMove() * 5;
// Updates each ball state
for (int i = 0; i < ballCount; i++)
{
// The ball is not grabbed
if (!balls[i].grabbed)
{
// Ball repositioning using the velocity
balls[i].position.X += balls[i].speed.X * delta;
balls[i].position.Y += balls[i].speed.Y * delta;
// Does the ball hit the screen right boundary?
if ((balls[i].position.X + balls[i].radius) >= screenWidth)
{
balls[i].position.X = screenWidth - balls[i].radius; // Ball repositioning
balls[i].speed.X = -balls[i].speed.X * balls[i].elasticity; // Elasticity makes the ball lose 10% of its velocity on hit
}
// Does the ball hit the screen left boundary?
else if ((balls[i].position.X - balls[i].radius) <= 0)
{
balls[i].position.X = balls[i].radius;
balls[i].speed.X = -balls[i].speed.X * balls[i].elasticity;
}
// The same for y axis
if ((balls[i].position.Y + balls[i].radius) >= screenHeight)
{
balls[i].position.Y = screenHeight - balls[i].radius;
balls[i].speed.Y = -balls[i].speed.Y * balls[i].elasticity;
}
else if ((balls[i].position.Y - balls[i].radius) <= 0)
{
balls[i].position.Y = balls[i].radius;
balls[i].speed.Y = -balls[i].speed.Y * balls[i].elasticity;
}
// Friction makes the ball lose 1% of its velocity each frame
balls[i].speed.X = balls[i].speed.X * balls[i].friction;
// Gravity affects only the y axis
balls[i].speed.Y = balls[i].speed.Y * balls[i].friction + gravity;
}
else
{
// Ball repositioning using the mouse position
balls[i].position.X = mousePos.X - pressOffset.X;
balls[i].position.Y = mousePos.Y - pressOffset.Y;
// While the ball is grabbed, recalculates its velocity
balls[i].speed.X = (balls[i].position.X - balls[i].prevPosition.X) / delta;
balls[i].speed.Y = (balls[i].position.Y - balls[i].prevPosition.Y) / delta;
balls[i].prevPosition = balls[i].position;
}
}
windowPosition = GetWindowPosition();
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RayWhite);
for (int i = 0; i < ballCount; i++)
{
DrawCircleV(balls[i].position, balls[i].radius, balls[i].color);
DrawCircleLinesV(balls[i].position, balls[i].radius, Color.Black);
}
DrawText("grab a ball by pressing with the mouse and throw it by releasing", 10, 10, 10, Color.DarkGray);
DrawText("right click to create new balls (keep left control pressed to create a lot)", 10, 30, 10, Color.DarkGray);
DrawText("use mouse wheel to change gravity", 10, 50, 10, Color.DarkGray);
DrawText("middle click to shake", 10, 70, 10, Color.DarkGray);
DrawText($"BALL COUNT: {ballCount}", 10, GetScreenHeight() - 70, 20, Color.Black);
DrawText($"GRAVITY: {gravity:F2}", 10, GetScreenHeight() - 40, 20, Color.Black);
EndDrawing();
//----------------------------------------------------------------------------------
}
public void Unload()
{
}
public static int Main()
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [shapes] example - ball physics");
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
var game = new BallPhysics();
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;
}
}