chore: clean recommit

Examples/Shapes/RlglTriangle.cs

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+/*******************************************************************************************
+*
+*   raylib [shapes] example - rlgl triangle
+*
+*   Example complexity rating: [★★☆☆] 2/4
+*
+*   Example originally created with raylib 6.0, last time updated with raylib 6.0
+*
+*   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.Rlgl;
+
+namespace Examples.Shapes;
+
+public partial class RlglTriangle : IExample
+{
+    private const int screenWidth = 800;
+    private const int screenHeight = 450;
+
+    public string Name => "Shapes / RLGL Triangle";
+
+    public string Title => "raylib [shapes] example - rlgl triangle";
+
+    public ConfigFlags ConfigFlags => ConfigFlags.Msaa4xHint;
+
+    // Starting postions and rendered triangle positions
+    private Vector2[] startingPositions;
+    private Vector2[] trianglePositions;
+
+    // Currently selected vertex, -1 means none
+    private int triangleIndex;
+    private bool linesMode;
+    private float handleRadius;
+
+    public void Init()
+    {
+        // Starting postions and rendered triangle positions
+        startingPositions = [new(400.0f, 150.0f), new(300.0f, 300.0f), new(500.0f, 300.0f)];
+        trianglePositions = [startingPositions[0], startingPositions[1], startingPositions[2]];
+
+        // Currently selected vertex, -1 means none
+        triangleIndex = -1;
+        linesMode = false;
+        handleRadius = 8.0f;
+    }
+
+    public void Update()
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed(KeyboardKey.Space)) linesMode = !linesMode;
+
+        // Check selected vertex
+        for (int i = 0; i < 3; i++)
+        {
+            // If the mouse is within the handle circle
+            if (CheckCollisionPointCircle(GetMousePosition(), trianglePositions[i], handleRadius) &&
+                IsMouseButtonDown(MouseButton.Left))
+            {
+                triangleIndex = i;
+                break;
+            }
+        }
+
+        // If the user has selected a vertex, offset it by the mouse's delta this frame
+        if (triangleIndex != -1)
+        {
+            Vector2 mouseDelta = GetMouseDelta();
+            trianglePositions[triangleIndex].X += mouseDelta.X;
+            trianglePositions[triangleIndex].Y += mouseDelta.Y;
+        }
+
+        // Reset index on release
+        if (IsMouseButtonReleased(MouseButton.Left)) triangleIndex = -1;
+
+        // Enable/disable backface culling (2-sided triangles, slower to render)
+        if (IsKeyPressed(KeyboardKey.Left)) EnableBackfaceCulling();
+        if (IsKeyPressed(KeyboardKey.Right)) DisableBackfaceCulling();
+
+        // Reset triangle vertices to starting positions and reset backface culling
+        if (IsKeyPressed(KeyboardKey.R))
+        {
+            trianglePositions[0] = startingPositions[0];
+            trianglePositions[1] = startingPositions[1];
+            trianglePositions[2] = startingPositions[2];
+
+            EnableBackfaceCulling();
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+        ClearBackground(Color.RayWhite);
+
+        if (linesMode)
+        {
+            // Draw triangle with lines
+            Begin(DrawMode.Lines);
+            // Three lines, six points
+            // Define color for next vertex
+            Color4ub(255, 0, 0, 255);
+            // Define vertex
+            Vertex2f(trianglePositions[0].X, trianglePositions[0].Y);
+            Color4ub(0, 255, 0, 255);
+            Vertex2f(trianglePositions[1].X, trianglePositions[1].Y);
+
+            Color4ub(0, 255, 0, 255);
+            Vertex2f(trianglePositions[1].X, trianglePositions[1].Y);
+            Color4ub(0, 0, 255, 255);
+            Vertex2f(trianglePositions[2].X, trianglePositions[2].Y);
+
+            Color4ub(0, 0, 255, 255);
+            Vertex2f(trianglePositions[2].X, trianglePositions[2].Y);
+            Color4ub(255, 0, 0, 255);
+            Vertex2f(trianglePositions[0].X, trianglePositions[0].Y);
+            End();
+        }
+        else
+        {
+            // Draw triangle as a triangle
+            Begin(DrawMode.Triangles);
+            // One triangle, three points
+            // Define color for next vertex
+            Color4ub(255, 0, 0, 255);
+            // Define vertex
+            Vertex2f(trianglePositions[0].X, trianglePositions[0].Y);
+            Color4ub(0, 255, 0, 255);
+            Vertex2f(trianglePositions[1].X, trianglePositions[1].Y);
+            Color4ub(0, 0, 255, 255);
+            Vertex2f(trianglePositions[2].X, trianglePositions[2].Y);
+            End();
+        }
+
+        // Render the vertex handles, reacting to mouse movement/input
+        for (int i = 0; i < 3; i++)
+        {
+            // Draw handle fill focused by mouse
+            if (CheckCollisionPointCircle(GetMousePosition(), trianglePositions[i], handleRadius))
+                DrawCircleV(trianglePositions[i], handleRadius, ColorAlpha(Color.DarkGray, 0.5f));
+
+            // Draw handle fill selected
+            if (i == triangleIndex) DrawCircleV(trianglePositions[i], handleRadius, Color.DarkGray);
+
+            // Draw handle outline
+            DrawCircleLinesV(trianglePositions[i], handleRadius, Color.Black);
+        }
+
+        // Draw controls
+        DrawText("SPACE: Toggle lines mode", 10, 10, 20, Color.DarkGray);
+        DrawText("LEFT-RIGHT: Toggle backface culling", 10, 40, 20, Color.DarkGray);
+        DrawText("MOUSE: Click and drag vertex points", 10, 70, 20, Color.DarkGray);
+        DrawText("R: Reset triangle to start positions", 10, 100, 20, Color.DarkGray);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    public void Unload()
+    {
+    }
+
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        SetConfigFlags(ConfigFlags.Msaa4xHint);
+        InitWindow(screenWidth, screenHeight, "raylib [shapes] example - rlgl triangle");
+
+        SetTargetFPS(60);
+        //--------------------------------------------------------------------------------------
+
+        var game = new RlglTriangle();
+        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;
+    }
+}