chore: clean recommit

Examples/Shapes/StarfieldEffect.cs

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+/*******************************************************************************************
+*
+*   raylib [shapes] example - starfield effect
+*
+*   Example complexity rating: [★★☆☆] 2/4
+*
+*   Example originally created with raylib 5.5, last time updated with raylib 6.0
+*
+*   Example contributed by JP Mortiboys (@themushroompirates) 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 JP Mortiboys (@themushroompirates)
+*
+********************************************************************************************/
+
+using System.Numerics;
+using static Raylib_cs.Raylib;
+using static Raylib_cs.Raymath;    // Required for: Lerp()
+
+namespace Examples.Shapes;
+
+public partial class StarfieldEffect : IExample
+{
+    private const int screenWidth = 800;
+    private const int screenHeight = 450;
+
+    private const int STAR_COUNT = 420;
+
+    public string Name => "Shapes / Starfield Effect";
+
+    public string Title => "raylib [shapes] example - starfield effect";
+
+    private Color bgColor;
+
+    // Speed at which we fly forward
+    private float speed;
+
+    // We're either drawing lines or circles
+    private bool drawLines;
+
+    private Vector3[] stars;
+    private Vector2[] starsScreenPos;
+
+    public void Init()
+    {
+        bgColor = ColorLerp(Color.DarkBlue, Color.Black, 0.69f);
+
+        // Speed at which we fly forward
+        speed = 10.0f / 9.0f;
+
+        // We're either drawing lines or circles
+        drawLines = true;
+
+        stars = new Vector3[STAR_COUNT];
+        starsScreenPos = new Vector2[STAR_COUNT];
+
+        // Setup the stars with a random position
+        for (int i = 0; i < STAR_COUNT; i++)
+        {
+            stars[i].X = (float)GetRandomValue(-screenWidth / 2, (int)screenWidth / 2);
+            stars[i].Y = (float)GetRandomValue(-screenHeight / 2, (int)screenHeight / 2);
+            stars[i].Z = 1.0f;
+        }
+    }
+
+    public void Update()
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // Change speed based on mouse
+        float mouseMove = GetMouseWheelMove();
+        if ((int)mouseMove != 0) speed += 2.0f * mouseMove / 9.0f;
+        if (speed < 0.0f) speed = 0.1f;
+        else if (speed > 2.0f) speed = 2.0f;
+
+        // Toggle lines / points with space bar
+        if (IsKeyPressed(KeyboardKey.Space)) drawLines = !drawLines;
+
+        float dt = GetFrameTime();
+        for (int i = 0; i < STAR_COUNT; i++)
+        {
+            // Update star's timer
+            stars[i].Z -= dt * speed;
+
+            // Calculate the screen position
+            starsScreenPos[i] = new Vector2(
+                screenWidth * 0.5f + stars[i].X / stars[i].Z,
+                screenHeight * 0.5f + stars[i].Y / stars[i].Z
+            );
+
+            // If the star is too old, or offscreen, it dies and we make a new random one
+            if ((stars[i].Z < 0.0f) || (starsScreenPos[i].X < 0) || (starsScreenPos[i].Y < 0.0f) ||
+                (starsScreenPos[i].X > screenWidth) || (starsScreenPos[i].Y > screenHeight))
+            {
+                stars[i].X = (float)GetRandomValue(-screenWidth / 2, screenWidth / 2);
+                stars[i].Y = (float)GetRandomValue(-screenHeight / 2, screenHeight / 2);
+                stars[i].Z = 1.0f;
+            }
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+        ClearBackground(bgColor);
+
+        for (int i = 0; i < STAR_COUNT; i++)
+        {
+            if (drawLines)
+            {
+                // Get the time a little while ago for this star, but clamp it
+                float t = Clamp(stars[i].Z + 1.0f / 32.0f, 0.0f, 1.0f);
+
+                // If it's different enough from the current time, we proceed
+                if ((t - stars[i].Z) > 1e-3)
+                {
+                    // Calculate the screen position of the old point
+                    Vector2 startPos = new Vector2(
+                        screenWidth * 0.5f + stars[i].X / t,
+                        screenHeight * 0.5f + stars[i].Y / t
+                    );
+
+                    // Draw a line connecting the old point to the current point
+                    DrawLineV(startPos, starsScreenPos[i], Color.RayWhite);
+                }
+            }
+            else
+            {
+                // Make the radius grow as the star ages
+                float radius = Lerp(stars[i].Z, 1.0f, 5.0f);
+
+                // Draw the circle
+                DrawCircleV(starsScreenPos[i], radius, Color.RayWhite);
+            }
+        }
+
+        DrawText($"[MOUSE WHEEL] Current Speed: {9.0f * speed / 2.0f:F0}", 10, 40, 20, Color.RayWhite);
+        DrawText($"[SPACE] Current draw mode: {(drawLines ? "Lines" : "Circles")}", 10, 70, 20, Color.RayWhite);
+
+        DrawFPS(10, 10);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    public void Unload()
+    {
+    }
+
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        InitWindow(screenWidth, screenHeight, "raylib [shapes] example - starfield effect");
+
+        SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+        //--------------------------------------------------------------------------------------
+
+        var game = new StarfieldEffect();
+        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;
+    }
+}