chore: clean recommit

Examples/Shapes/LinesDrawing.cs

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+/*******************************************************************************************
+*
+*   raylib [shapes] example - lines drawing
+*
+*   Example complexity rating: [★☆☆☆] 1/4
+*
+*   Example originally created with raylib 6.0, last time updated with raylib 5.6
+*
+*   Example contributed by Robin (@RobinsAviary) 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 Robin (@RobinsAviary)
+*
+********************************************************************************************/
+
+using System.Numerics;
+using static Raylib_cs.Raylib;
+using static Raylib_cs.Raymath;
+
+namespace Examples.Shapes;
+
+public partial class LinesDrawing : IExample
+{
+    private const int screenWidth = 800;
+    private const int screenHeight = 450;
+
+    public string Name => "Shapes / Lines Drawing";
+
+    public string Title => "raylib [shapes] example - lines drawing";
+
+    // Hint text that shows before you click the screen
+    private bool startText;
+
+    // The mouse's position on the previous frame
+    private Vector2 mousePositionPrevious;
+
+    // The canvas to draw lines on
+    private RenderTexture2D canvas;
+
+    // The line's thickness
+    private float lineThickness;
+    // The lines hue (in HSV, from 0-360)
+    private float lineHue;
+
+    public void Init()
+    {
+        // Hint text that shows before you click the screen
+        startText = true;
+
+        // The mouse's position on the previous frame
+        mousePositionPrevious = GetMousePosition();
+
+        // The canvas to draw lines on
+        canvas = LoadRenderTexture(screenWidth, screenHeight);
+
+        // The line's thickness
+        lineThickness = 8.0f;
+        // The lines hue (in HSV, from 0-360)
+        lineHue = 0.0f;
+
+        // Clear the canvas to the background color
+        BeginTextureMode(canvas);
+            ClearBackground(Color.RayWhite);
+        EndTextureMode();
+    }
+
+    public void Update()
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // Disable the hint text once the user clicks
+        if (IsMouseButtonPressed(MouseButton.Left) && startText) startText = false;
+
+        // Clear the canvas when the user middle-clicks
+        if (IsMouseButtonPressed(MouseButton.Middle))
+        {
+            BeginTextureMode(canvas);
+                ClearBackground(Color.RayWhite);
+            EndTextureMode();
+        }
+
+        // Store whether the left and right buttons are down
+        bool leftButtonDown = IsMouseButtonDown(MouseButton.Left);
+        bool rightButtonDown = IsMouseButtonDown(MouseButton.Right);
+
+        if (leftButtonDown || rightButtonDown)
+        {
+            // The color for the line
+            Color drawColor = Color.White;
+
+            if (leftButtonDown)
+            {
+                // Increase the hue value by the distance our cursor has moved since the last frame (divided by 3)
+                lineHue += Vector2Distance(mousePositionPrevious, GetMousePosition())/3.0f;
+
+                // While the hue is >=360, subtract it to bring it down into the range 0-360
+                // This is more visually accurate than resetting to zero
+                while (lineHue >= 360.0f) lineHue -= 360.0f;
+
+                // Create the final color
+                drawColor = ColorFromHSV(lineHue, 1.0f, 1.0f);
+            }
+            else if (rightButtonDown) drawColor = Color.RayWhite; // Use the background color as an "eraser"
+
+            // Draw the line onto the canvas
+            BeginTextureMode(canvas);
+                // Circles act as "caps", smoothing corners
+                DrawCircleV(mousePositionPrevious, lineThickness/2.0f, drawColor);
+                DrawCircleV(GetMousePosition(), lineThickness/2.0f, drawColor);
+                DrawLineEx(mousePositionPrevious, GetMousePosition(), lineThickness, drawColor);
+            EndTextureMode();
+        }
+
+        // Update line thickness based on mousewheel
+        lineThickness += GetMouseWheelMove();
+        lineThickness = Clamp(lineThickness, 1.0f, 500.0f);
+
+        // Update mouse's previous position
+        mousePositionPrevious = GetMousePosition();
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            // Draw the render texture to the screen, flipped vertically to make it appear top-side up
+            DrawTextureRec(canvas.Texture, new Rectangle(0.0f, 0.0f, (float)canvas.Texture.Width, (float)-canvas.Texture.Height), Vector2Zero(), Color.White);
+
+            // Draw the preview circle
+            if (!leftButtonDown) DrawCircleLinesV(GetMousePosition(), lineThickness/2.0f, new Color(127, 127, 127, 127));
+
+            // Draw the hint text
+            if (startText) DrawText("try clicking and dragging!", 275, 215, 20, Color.LightGray);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    public void Unload()
+    {
+        UnloadRenderTexture(canvas); // Unload the canvas render texture
+    }
+
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        InitWindow(screenWidth, screenHeight, "raylib [shapes] example - lines drawing");
+
+        SetTargetFPS(60);
+        //--------------------------------------------------------------------------------------
+
+        var game = new LinesDrawing();
+        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;
+    }
+}