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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
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175
Examples/Textures/Polygon.cs
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@ -1,12 +1,17 @@
/*******************************************************************************************
*
* raylib [shapes] example - Draw Textured Polygon
* raylib [textures] example - polygon drawing
*
* This example has been created using raylib 99.98 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
* Example complexity rating: [★☆☆☆] 1/4
*
* Copyright (c) 2014 Ramon Santamaria (@raysan5)
* Copyright (c) 2021 Chris Camacho (codifies - bedroomcoders.co.uk)
* Example originally created with raylib 3.7, last time updated with raylib 3.7
*
* Example contributed by Chris Camacho (@chriscamacho) 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) 2021-2025 Chris Camacho (@chriscamacho) and Ramon Santamaria (@raysan5)
*
********************************************************************************************/
@ -15,37 +20,43 @@ using static Raylib_cs.Raylib;
namespace Examples.Textures;
public class Polygon
public partial class Polygon : IExample
{
public static int Main()
private const int screenWidth = 800;
private const int screenHeight = 450;
public string Name => "Textures / Textured Polygon";
public string Title => "raylib [textures] example - polygon drawing";
private Vector2[] texcoords;
private Vector2[] points;
private Vector2[] positions;
private Texture2D texture;
private float angle;
public void Init()
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
texcoords = new[] {
new Vector2(0.75f, 0),
new Vector2(0.25f, 0),
new Vector2(0, 0.5f),
new Vector2(0, 0.75f),
new Vector2(0.25f, 1),
new Vector2(0.375f, 0.875f),
new Vector2(0.625f, 0.875f),
new Vector2(0.75f, 1),
new Vector2(1, 0.75f),
new Vector2(1, 0.5f),
// Close the poly
new Vector2(0.75f, 0)
};
InitWindow(screenWidth, screenHeight, "raylib [textures] example - Textured Polygon");
Vector2[] texcoords = new[] {
new Vector2(0.75f, 0),
new Vector2(0.25f, 0),
new Vector2(0, 0.5f),
new Vector2(0, 0.75f),
new Vector2(0.25f, 1),
new Vector2(0.375f, 0.875f),
new Vector2(0.625f, 0.875f),
new Vector2(0.75f, 1),
new Vector2(1, 0.75f),
new Vector2(1, 0.5f),
// Close the poly
new Vector2(0.75f, 0)
};
Vector2[] points = new Vector2[11];
points = new Vector2[11];
// Define the base poly vertices from the UV's
// NOTE: They can be specified in any other way
for (int i = 0; i < points.Length; i++)
for (var i = 0; i < points.Length; i++)
{
points[i].X = (texcoords[i].X - 0.5f) * 256.0f;
points[i].Y = (texcoords[i].Y - 0.5f) * 256.0f;
@ -53,58 +64,49 @@ public class Polygon
// Define the vertices drawing position
// NOTE: Initially same as points but updated every frame
Vector2[] positions = new Vector2[points.Length];
for (int i = 0; i < positions.Length; i++)
positions = new Vector2[points.Length];
for (var i = 0; i < positions.Length; i++)
{
positions[i] = points[i];
}
Texture2D texture = LoadTexture("resources/cat.png");
float angle = 0;
texture = LoadTexture("resources/cat.png");
angle = 0;
}
SetTargetFPS(60);
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose())
public void Update()
{
// Update
//----------------------------------------------------------------------------------
angle += 1;
for (var i = 0; i < positions.Length; i++)
{
// Update
//----------------------------------------------------------------------------------
// Update your variables here
//----------------------------------------------------------------------------------
angle += 1;
for (int i = 0; i < positions.Length; i++)
{
positions[i] = Raymath.Vector2Rotate(points[i], angle * Raylib.DEG2RAD);
}
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RayWhite);
DrawText("Textured Polygon", 20, 20, 20, Color.DarkGray);
Vector2 center = new(screenWidth / 2, screenHeight / 2);
DrawTexturePoly(texture, center, positions, texcoords, positions.Length, Color.White);
EndDrawing();
//----------------------------------------------------------------------------------
positions[i] = Raymath.Vector2Rotate(points[i], angle * Raylib.DEG2RAD);
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RayWhite);
DrawText("textured polygon", 20, 20, 20, Color.DarkGray);
Vector2 center = new(screenWidth / 2, screenHeight / 2);
DrawTexturePoly(texture, center, positions, texcoords, positions.Length, Color.White);
EndDrawing();
//----------------------------------------------------------------------------------
}
public void Unload()
{
UnloadTexture(texture);
// De-Initialization
//--------------------------------------------------------------------------------------
CloseWindow();
//--------------------------------------------------------------------------------------
return 0;
}
// Draw textured polygon, defined by vertex and texture coordinates
// NOTE: Polygon center must have straight line path to all points
// without crossing perimeter, points must be in anticlockwise order
static void DrawTexturePoly(
private static void DrawTexturePoly(
Texture2D texture,
Vector2 center,
Vector2[] points,
@ -114,13 +116,11 @@ public class Polygon
)
{
Rlgl.SetTexture(texture.Id);
// Texturing is only supported on RL_QUADS
Rlgl.Begin(DrawMode.Quads);
Rlgl.Begin(DrawMode.Triangles);
Rlgl.Color4ub(tint.R, tint.G, tint.B, tint.A);
for (int i = 0; i < pointCount - 1; i++)
for (var i = 0; i < pointCount - 1; i++)
{
Rlgl.TexCoord2f(0.5f, 0.5f);
Rlgl.Vertex2f(center.X, center.Y);
@ -130,12 +130,37 @@ public class Polygon
Rlgl.TexCoord2f(texcoords[i + 1].X, texcoords[i + 1].Y);
Rlgl.Vertex2f(points[i + 1].X + center.X, points[i + 1].Y + center.Y);
Rlgl.TexCoord2f(texcoords[i + 1].X, texcoords[i + 1].Y);
Rlgl.Vertex2f(points[i + 1].X + center.X, points[i + 1].Y + center.Y);
}
Rlgl.End();
Rlgl.SetTexture(0);
}
public static int Main()
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [textures] example - polygon drawing");
SetTargetFPS(60);
//--------------------------------------------------------------------------------------
var game = new Polygon();
game.Init();
// Main game loop
while (!WindowShouldClose())
{
game.Update();
}
game.Unload();
// De-Initialization
//--------------------------------------------------------------------------------------
CloseWindow();
//--------------------------------------------------------------------------------------
return 0;
}
}