Libgdx球赛

Question

I'm really new to Libgdx engine. I've been trying to make a ball move randomly and bounce of the edges. It took me two days and I couldn't do it. I only have the ball bouncing up and down. There is a lack of documentation for this engine, so it's difficult to learn it. Any help is appreciated.

Answer 1

Some pseudocode:

If ball.radius + ball.x >= srceen.width or ball.x - ball.radius <= 0
    ball.velocityx *= -1

Answer 2

you can try this:

    rev=-1;
    vy = intSpeedY;
    vx = intSpeedX;

    ball.x += vx;
    ball.y += vy;
    if (ball.x + ball.radius > right) {
      ball.x = right - ball.radius;
      vx *= rev;
    } else if (ball.x - ball.radius < left) {
      ball.x = left + ball.radius;
      vx *= rev;
    }
    if (ball.y + ball.radius > bottom) {
      ball.y = bottom - ball.radius;
      vy *= rev;
    } else if (ball.y - ball.radius < top) {
      ball.y = top + ball.radius;
      vy *= rev;
    }

good luck.