chore: clean recommit

Examples/Shapes/Kaleidoscope.cs

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+/*******************************************************************************************
+*
+*   raylib [shapes] example - kaleidoscope
+*
+*   Example complexity rating: [★★☆☆] 2/4
+*
+*   Example originally created with raylib 5.5, last time updated with raylib 5.6
+*
+*   Example contributed by Hugo ARNAL (@hugoarnal) 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 Hugo ARNAL (@hugoarnal) and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+using System;
+using System.Numerics;
+using static Raylib_cs.Raylib;
+using static Raylib_cs.Raymath;
+
+namespace Examples.Shapes;
+
+public partial class Kaleidoscope : IExample
+{
+    private const int screenWidth = 800;
+    private const int screenHeight = 450;
+
+    private const int MAX_DRAW_LINES = 8192;
+
+    // Line data type
+    private struct Line
+    {
+        public Vector2 Start;
+        public Vector2 End;
+    }
+
+    public string Name => "Shapes / Kaleidoscope";
+
+    public string Title => "raylib [shapes] example - kaleidoscope";
+
+    public int TargetFps => 20;
+
+    // Lines array as a global static variable to be stored
+    // in heap and avoid potential stack overflow (on Web platform)
+    private Line[] lines;
+
+    // Line drawing properties
+    private int symmetry;
+    private float angle;
+    private float thickness;
+    private Rectangle resetButtonRec;
+    private Rectangle backButtonRec;
+    private Rectangle nextButtonRec;
+    private Vector2 mousePos;
+    private Vector2 prevMousePos;
+    private Vector2 scaleVector;
+    private Vector2 offset;
+
+    private Camera2D camera;
+
+    private int currentLineCounter;
+    private int totalLineCounter;
+    private bool resetButtonClicked;
+    private bool backButtonClicked;
+    private bool nextButtonClicked;
+
+    public void Init()
+    {
+        lines = new Line[MAX_DRAW_LINES];
+
+        // Line drawing properties
+        symmetry = 6;
+        angle = 360.0f / (float)symmetry;
+        thickness = 3.0f;
+        resetButtonRec = new(screenWidth - 55.0f, 5.0f, 50, 25);
+        backButtonRec = new(screenWidth - 55.0f, screenHeight - 30.0f, 25, 25);
+        nextButtonRec = new(screenWidth - 30.0f, screenHeight - 30.0f, 25, 25);
+        mousePos = new(0, 0);
+        prevMousePos = new(0, 0);
+        scaleVector = new(1.0f, -1.0f);
+        offset = new((float)screenWidth / 2.0f, (float)screenHeight / 2.0f);
+
+        camera = new();
+        camera.Target = new(0, 0);
+        camera.Offset = offset;
+        camera.Rotation = 0.0f;
+        camera.Zoom = 1.0f;
+
+        currentLineCounter = 0;
+        totalLineCounter = 0;
+        resetButtonClicked = false;
+        backButtonClicked = false;
+        nextButtonClicked = false;
+    }
+
+    public void Update()
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        prevMousePos = mousePos;
+        mousePos = GetMousePosition();
+
+        Vector2 lineStart = Vector2Subtract(mousePos, offset);
+        Vector2 lineEnd = Vector2Subtract(prevMousePos, offset);
+
+        if (
+            IsMouseButtonDown(MouseButton.Left)
+            && !CheckCollisionPointRec(mousePos, resetButtonRec)
+            && !CheckCollisionPointRec(mousePos, backButtonRec)
+            && !CheckCollisionPointRec(mousePos, nextButtonRec)
+        )
+        {
+            for (int s = 0; (s < symmetry) && (totalLineCounter < (MAX_DRAW_LINES - 1)); s++)
+            {
+                lineStart = Vector2Rotate(lineStart, angle * DEG2RAD);
+                lineEnd = Vector2Rotate(lineEnd, angle * DEG2RAD);
+
+                // Store mouse line
+                lines[totalLineCounter].Start = lineStart;
+                lines[totalLineCounter].End = lineEnd;
+
+                // Store reflective line
+                lines[totalLineCounter + 1].Start = Vector2Multiply(lineStart, scaleVector);
+                lines[totalLineCounter + 1].End = Vector2Multiply(lineEnd, scaleVector);
+
+                totalLineCounter += 2;
+                currentLineCounter = totalLineCounter;
+            }
+        }
+
+        if (resetButtonClicked)
+        {
+            Array.Clear(lines, 0, MAX_DRAW_LINES);
+            currentLineCounter = 0;
+            totalLineCounter = 0;
+        }
+
+        if (backButtonClicked && (currentLineCounter > 0))
+        {
+            currentLineCounter -= 1;
+        }
+
+        if (nextButtonClicked && (currentLineCounter < MAX_DRAW_LINES) && ((currentLineCounter + 1) <= totalLineCounter))
+        {
+            currentLineCounter += 1;
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+        ClearBackground(Color.RayWhite);
+        BeginMode2D(camera);
+
+        for (int s = 0; s < symmetry; s++)
+        {
+            for (int i = 0; i < currentLineCounter; i += 2)
+            {
+                DrawLineEx(lines[i].Start, lines[i].End, thickness, Color.Black);
+                DrawLineEx(lines[i + 1].Start, lines[i + 1].End, thickness, Color.Black);
+            }
+        }
+
+        EndMode2D();
+
+        // NOTE: raygui is not bound in raylib-cs, so the on-screen back/next/reset
+        // controls are unavailable; drawing with the mouse still works.
+        //------------------------------------------------------------------------------
+        /*
+        if ((currentLineCounter - 1) < 0) GuiDisable();
+
+        backButtonClicked = GuiButton(backButtonRec, "<");
+        GuiEnable();
+
+        if ((currentLineCounter + 1) > totalLineCounter) GuiDisable();
+
+        nextButtonClicked = GuiButton(nextButtonRec, ">");
+        GuiEnable();
+        resetButtonClicked = GuiButton(resetButtonRec, "Reset");
+        */
+        //------------------------------------------------------------------------------
+
+        DrawText($"LINES: {currentLineCounter}/{MAX_DRAW_LINES}", 10, screenHeight - 30, 20, Color.Maroon);
+        DrawFPS(10, 10);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    public void Unload()
+    {
+    }
+
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        InitWindow(screenWidth, screenHeight, "raylib [shapes] example - kaleidoscope");
+
+        SetTargetFPS(20);
+        //--------------------------------------------------------------------------------------
+
+        var game = new Kaleidoscope();
+        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;
+    }
+}