redgpu/raygpu: Simple & Portable Graphics Library

examples/input_keys.c
131 строка5 KB
manuel5975p
Web Keyinput
02 янв 2025, 12:45
02 янв 2025, 12:45496280c
#include <raygpu.h>
#ifdef __EMSCRIPTEN__
#include <emscripten.h>
#endif
#define MAX_BUILDINGS   100
Rectangle player = { 400, 550, 40, 40 };
Rectangle buildings[MAX_BUILDINGS] = { 0 };
Color buildColors[MAX_BUILDINGS] = { 0 };
Camera2D camera;
const int screenWidth = 1200;
const int screenHeight = 720;
void mainloop(void){
// Update
        //----------------------------------------------------------------------------------
        // Player movement
        if (IsKeyDown(KEY_RIGHT)) player.x += 2;
        else if (IsKeyDown(KEY_LEFT)) player.x -= 2;

        // Camera target follows player
        camera.target = (Vector2){ player.x + 20, player.y + 20 };

        // Camera rotation controls
        if (IsKeyDown(KEY_A)) camera.rotation--;
        else if (IsKeyDown(KEY_S)) camera.rotation++;

        // Limit camera rotation to 80 degrees (-40 to 40)
        if (camera.rotation > 40) camera.rotation = 40;
        else if (camera.rotation < -40) camera.rotation = -40;

        // Camera zoom controls
        camera.zoom += ((float)GetMouseWheelMove()*0.05f);

        if (camera.zoom > 3.0f) camera.zoom = 3.0f;
        else if (camera.zoom < 0.1f) camera.zoom = 0.1f;

        // Camera reset (zoom and rotation)
        if (IsKeyPressed(KEY_R))
        {
            camera.zoom = 1.0f;
            camera.rotation = 0.0f;
        }
        //----------------------------------------------------------------------------------

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

            ClearBackground(RAYWHITE);

            BeginMode2D(camera);

                DrawRectangle(-6000, 320, 13000, 8000, DARKGRAY);

                for (int i = 0; i < MAX_BUILDINGS; i++) DrawRectangleRec(buildings[i], buildColors[i]);

                DrawRectangleRec(player, RED);

                DrawLine((int)camera.target.x, -screenHeight*10, (int)camera.target.x, screenHeight*10, GREEN);
                DrawLine(-screenWidth*10, (int)camera.target.y, screenWidth*10, (int)camera.target.y, GREEN);

            EndMode2D();

            DrawText("SCREEN AREA", 940, 10, 30, RED);

            DrawRectangle(0, 0, screenWidth, 5, RED);
            DrawRectangle(0, 5, 5, screenHeight - 10, RED);
            DrawRectangle(screenWidth - 5, 5, 5, screenHeight - 10, RED);
            DrawRectangle(0, screenHeight - 5, screenWidth, 5, RED);
            DrawRectangle( 10, 10, 850, 210, Fade(SKYBLUE, 0.5f));
            DrawRectangleLines( 10, 10, 850, 210, BLUE);

            DrawText("Free 2d camera controls:", 20, 20, 30, BLACK);
            DrawText("- Right/Left to move Offset", 40, 60, 30, DARKGRAY);
            DrawText("- Mouse Wheel to Zoom in-out", 40, 100, 30, DARKGRAY);
            DrawText("- A / S to Rotate", 40, 140, 30, DARKGRAY);
            DrawText("- R to reset Zoom and Rotation", 40, 180, 30, DARKGRAY);

        EndDrawing();
        //----------------------------------------------------------------------------------
}
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    

    InitWindow(screenWidth, screenHeight, "Key Input Example");

    

    int spacing = 0;

    for (int i = 0; i < MAX_BUILDINGS; i++)
    {
        buildings[i].width = (float)GetRandomValue(50, 200);
        buildings[i].height = (float)GetRandomValue(100, 800);
        buildings[i].y = screenHeight - 130.0f - buildings[i].height;
        buildings[i].x = -6000.0f + spacing;

        spacing += (int)buildings[i].width;

        buildColors[i] = (Color){ GetRandomValue(200, 240), GetRandomValue(200, 240), GetRandomValue(200, 250), 255 };
    }

    camera.target = (Vector2){ player.x + 20.0f, player.y + 20.0f };
    camera.offset = (Vector2){ screenWidth/2.0f, screenHeight/2.0f };
    camera.rotation = 0.0f;
    camera.zoom = 1.0f;

    SetTargetFPS(60);                   // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    #ifndef __EMSCRIPTEN__
    while(!WindowShouldClose()){
        mainloop();
    }
    #else
    emscripten_set_main_loop(mainloop, 0, 0);
    #endif

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

    return 0;
}