raylib-cs/Examples/others/bunnymark.cs

using Raylib;
using static Raylib.Raylib;

public partial class bunnymark
{
    /*******************************************************************************************
    *
    *   raylib example - Bunnymark
    *
    *   This example has been created using raylib 1.6 (www.raylib.com)
    *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
    *
    *   Copyright (c) 2014 Ramon Santamaria (@raysan5)
    *
    ********************************************************************************************/


    public const int MAX_BUNNIES = 100000;

    struct Bunny
    {
        public Vector2 position;
        public Vector2 speed;
        public Color color;
    }

    public static int Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        int screenWidth = 1280;
        int screenHeight = 960;

        InitWindow(screenWidth, screenHeight, "raylib example - Bunnymark");

        Texture2D texBunny = LoadTexture("resources/wabbit_alpha.png");

        Bunny[] bunnies = new Bunny[MAX_BUNNIES];          // Bunnies array

        int bunniesCount = 0;    // Bunnies counter

        SetTargetFPS(60);
        //--------------------------------------------------------------------------------------

        // Main game loop
        while (!WindowShouldClose())    // Detect window close button or ESC key
        {
            // Update
            //----------------------------------------------------------------------------------
            if (IsMouseButtonDown(MouseButton.MOUSE_LEFT_BUTTON))
            {
                // Create more bunnies
                for (int i = 0; i < 100; i++)
                {
                    bunnies[bunniesCount].position = GetMousePosition();
                    bunnies[bunniesCount].speed.x = (float)GetRandomValue(250, 500)/60.0f;
                    bunnies[bunniesCount].speed.y = (float)(GetRandomValue(250, 500) - 500)/60.0f;
                    bunniesCount++;
                }
            }

            // Update bunnies
            for (int i = 0; i < bunniesCount; i++)
            {
                bunnies[i].position.x += bunnies[i].speed.x;
                bunnies[i].position.y += bunnies[i].speed.y;

                if ((bunnies[i].position.x > GetScreenWidth()) || (bunnies[i].position.x < 0)) bunnies[i].speed.x *= -1;
                if ((bunnies[i].position.y > GetScreenHeight()) || (bunnies[i].position.y < 0)) bunnies[i].speed.y *= -1;
            }
            //----------------------------------------------------------------------------------

            // Draw
            //----------------------------------------------------------------------------------
            BeginDrawing();

                ClearBackground(RAYWHITE);

                for (int i = 0; i < bunniesCount; i++)
                {
                    // NOTE: When internal QUADS batch limit is reached, a draw call is launched and
                    // batching buffer starts being filled again; before launching the draw call,
                    // updated vertex data from internal buffer is send to GPU... it seems it generates
                    // a stall and consequently a frame drop, limiting number of bunnies drawn at 60 fps
                    DrawTexture(texBunny, (int)bunnies[i].position.x, (int)bunnies[i].position.y, RAYWHITE);
                }

                DrawRectangle(0, 0, screenWidth, 40, LIGHTGRAY);
                DrawText("raylib bunnymark", 10, 10, 20, DARKGRAY);
                DrawText(string.Format("bunnies: {0}", bunniesCount), 400, 10, 20, RED);
                DrawFPS(260, 10);

            EndDrawing();
            //----------------------------------------------------------------------------------
        }

        // De-Initialization
        //--------------------------------------------------------------------------------------
        CloseWindow();        // Close window and OpenGL context
        //--------------------------------------------------------------------------------------

        return 0;
    }

}