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feat: backporting existing raylib-cs examples and new official raylib examples to WASM, adopting raylib's original code style

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tiger tiger tiger 2026-07-17 08:22:54 +02:00
commit f804ab7773
234 changed files with 38997 additions and 10578 deletions
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255
Examples/Textures/ParticlesBlending.cs
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@ -1,11 +1,15 @@
/*******************************************************************************************
*
* raylib example - particles blending
* raylib [textures] example - particles blending
*
* This example has been created using raylib 1.7 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
* Example complexity rating: [★☆☆☆] 1/4
*
* Copyright (c) 2017 Ramon Santamaria (@raysan5)
* Example originally created with raylib 1.7, last time updated with raylib 3.5
*
* 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) 2017-2025 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
@ -14,12 +18,19 @@ using static Raylib_cs.Raylib;
namespace Examples.Textures;
public class ParticlesBlending
public partial class ParticlesBlending : IExample
{
private const int screenWidth = 800;
private const int screenHeight = 450;
public const int MaxParticles = 200;
public string Name => "Textures / Particles Blending";
public string Title => "raylib [textures] example - particles blending";
// Particle structure with basic data
struct Particle
private struct Particle
{
public Vector2 Position;
public Color Color;
@ -30,20 +41,18 @@ public class ParticlesBlending
public bool Active;
}
public static int Main()
private Particle[] mouseTail;
private float gravity;
private Texture2D smoke;
private BlendMode blending;
public void Init()
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [textures] example - particles blending");
// Particles pool, reuse them!
Particle[] mouseTail = new Particle[MaxParticles];
mouseTail = new Particle[MaxParticles];
// Initialize particles
for (int i = 0; i < mouseTail.Length; i++)
for (var i = 0; i < mouseTail.Length; i++)
{
mouseTail[i].Position = new Vector2(0, 0);
mouseTail[i].Color = new Color(
@ -58,113 +67,133 @@ public class ParticlesBlending
mouseTail[i].Active = false;
}
float gravity = 3.0f;
Texture2D smoke = LoadTexture("resources/spark_flame.png");
BlendMode blending = BlendMode.Alpha;
gravity = 3.0f;
smoke = LoadTexture("resources/spark_flame.png");
blending = BlendMode.Alpha;
}
public void Update()
{
// Update
//----------------------------------------------------------------------------------
// Activate one particle every frame and Update active particles
// NOTE: Particles initial position should be mouse position when activated
// NOTE: Particles fall down with gravity and rotation... and disappear after 2 seconds (alpha = 0)
// NOTE: When a particle disappears, active = false and it can be reused
for (var i = 0; i < mouseTail.Length; i++)
{
if (!mouseTail[i].Active)
{
mouseTail[i].Active = true;
mouseTail[i].Alpha = 1.0f;
mouseTail[i].Position = GetMousePosition();
i = mouseTail.Length;
}
}
for (var i = 0; i < mouseTail.Length; i++)
{
if (mouseTail[i].Active)
{
mouseTail[i].Position.Y += gravity / 2;
mouseTail[i].Alpha -= 0.005f;
if (mouseTail[i].Alpha <= 0.0f)
{
mouseTail[i].Active = false;
}
mouseTail[i].Rotation += 2.0f;
}
}
if (IsKeyPressed(KeyboardKey.Space))
{
if (blending == BlendMode.Alpha)
{
blending = BlendMode.Additive;
}
else
{
blending = BlendMode.Alpha;
}
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.DarkGray);
BeginBlendMode(blending);
// Draw active particles
for (var i = 0; i < mouseTail.Length; i++)
{
if (mouseTail[i].Active)
{
Rectangle source = new(0, 0, smoke.Width, smoke.Height);
Rectangle dest = new(
mouseTail[i].Position.X,
mouseTail[i].Position.Y,
smoke.Width * mouseTail[i].Size,
smoke.Height * mouseTail[i].Size
);
Vector2 position = new(
smoke.Width * mouseTail[i].Size / 2,
smoke.Height * mouseTail[i].Size / 2
);
var color = Fade(mouseTail[i].Color, mouseTail[i].Alpha);
DrawTexturePro(smoke, source, dest, position, mouseTail[i].Rotation, color);
}
}
EndBlendMode();
DrawText("PRESS SPACE to CHANGE BLENDING MODE", 180, 20, 20, Color.Black);
if (blending == BlendMode.Alpha)
{
DrawText("ALPHA BLENDING", 290, screenHeight - 40, 20, Color.Black);
}
else
{
DrawText("ADDITIVE BLENDING", 280, screenHeight - 40, 20, Color.RayWhite);
}
EndDrawing();
//----------------------------------------------------------------------------------
}
public void Unload()
{
UnloadTexture(smoke);
}
public static int Main()
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [textures] example - particles blending");
SetTargetFPS(60);
//--------------------------------------------------------------------------------------
var game = new ParticlesBlending();
game.Init();
// Main game loop
while (!WindowShouldClose())
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
// Activate one particle every frame and Update active particles
// NOTE: Particles initial position should be mouse position when activated
// NOTE: Particles fall down with gravity and rotation... and disappear after 2 seconds (alpha = 0)
// NOTE: When a particle disappears, active = false and it can be reused.
for (int i = 0; i < mouseTail.Length; i++)
{
if (!mouseTail[i].Active)
{
mouseTail[i].Active = true;
mouseTail[i].Alpha = 1.0f;
mouseTail[i].Position = GetMousePosition();
i = mouseTail.Length;
}
}
for (int i = 0; i < mouseTail.Length; i++)
{
if (mouseTail[i].Active)
{
mouseTail[i].Position.Y += gravity / 2;
mouseTail[i].Alpha -= 0.005f;
if (mouseTail[i].Alpha <= 0.0f)
{
mouseTail[i].Active = false;
}
mouseTail[i].Rotation += 2.0f;
}
}
if (IsKeyPressed(KeyboardKey.Space))
{
if (blending == BlendMode.Alpha)
{
blending = BlendMode.Additive;
}
else
{
blending = BlendMode.Alpha;
}
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.DarkGray);
BeginBlendMode(blending);
// Draw active particles
for (int i = 0; i < mouseTail.Length; i++)
{
if (mouseTail[i].Active)
{
Rectangle source = new(0, 0, smoke.Width, smoke.Height);
Rectangle dest = new(
mouseTail[i].Position.X,
mouseTail[i].Position.Y,
smoke.Width * mouseTail[i].Size,
smoke.Height * mouseTail[i].Size
);
Vector2 position = new(
smoke.Width * mouseTail[i].Size / 2,
smoke.Height * mouseTail[i].Size / 2
);
Color color = ColorAlpha(mouseTail[i].Color, mouseTail[i].Alpha);
DrawTexturePro(smoke, source, dest, position, mouseTail[i].Rotation, color);
}
}
EndBlendMode();
DrawText("PRESS SPACE to CHANGE BLENDING MODE", 180, 20, 20, Color.Black);
if (blending == BlendMode.Alpha)
{
DrawText("ALPHA BLENDING", 290, screenHeight - 40, 20, Color.Black);
}
else
{
DrawText("ADDITIVE BLENDING", 280, screenHeight - 40, 20, Color.RayWhite);
}
EndDrawing();
//----------------------------------------------------------------------------------
game.Update();
}
game.Unload();
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadTexture(smoke);
CloseWindow();
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;