Sdl3 Example • Recommended & Easy

// Bounce off edges (with radius adjustment) if (ball_x - BALL_RADIUS < 0) { ball_x = BALL_RADIUS; velocity_x = -velocity_x; } else if (ball_x + BALL_RADIUS > WINDOW_WIDTH) { ball_x = WINDOW_WIDTH - BALL_RADIUS; velocity_x = -velocity_x; } if (ball_y - BALL_RADIUS < 0) { ball_y = BALL_RADIUS; velocity_y = -velocity_y; } else if (ball_y + BALL_RADIUS > WINDOW_HEIGHT) { ball_y = WINDOW_HEIGHT - BALL_RADIUS; velocity_y = -velocity_y; }

// 2. Create a window SDL_Window* window = SDL_CreateWindow("SDL3 Bouncing Ball", WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_RESIZABLE); if (!window) { SDL_Log("SDL_CreateWindow Error: %s", SDL_GetError()); SDL_Quit(); return 1; } sdl3 example

– SDL_CreateRenderer is simplified: it no longer requires an index or a “driver” parameter; passing NULL for the second argument auto-selects the best backend. The flags SDL_RENDERER_ACCELERATED ensure we use GPU hardware. // Bounce off edges (with radius adjustment) if

// Update based on delta time Uint64 current_time = SDL_GetTicks(); float delta_time = (current_time - last_time) / 1000.0f; if (delta_time > 0.05f) delta_time = 0.05f; // clamp for safety last_time = current_time; // Update based on delta time Uint64 current_time