- ball_e += ball_dy * ball_speed;
- ball.x += ball_step_x * ball_speed;
- while (ball_e >= ball_dx) {
- ball_e -= ball_dx;
- ball.y += ball_step_y;
-
- /* bounce off walls */
- if (ball.y < 0 || ball.y + ball.h > AO_VGA_HEIGHT) {
- ball_step_y = -ball_step_y;