Question

当比赛开始时，球将使用此代码完美地从边缘反弹：

    if (Is_hit == true && ballFired == true )
    {
        //collision here
        ballXPos = 960 - ballimg.Width - (ballXPos - 960 + ballimg.Width);
        ballXDir = +1;

        ballYDir = -1;
    }

    if (Ballvisible == true)
    {


        if (Keyboard.GetState().IsKeyDown(Keys.Space) && ballFired == false)
        {
            ballFired = true;

        }
        if (ballFired == true)
        {


            ballXPos = ballXPos - (ballSpeed * ballXDir);

            ballYPos = ballYPos + (ballSpeed * ballYDir);

        }
        if (ballXPos < 0)
        {
            ballXPos = -ballXPos;
            ballXDir = -1;


        }
        if (ballXPos > 960 - ballimg.Width)
        {
            ballXPos = 960 - ballimg.Width - (ballXPos - 960 + ballimg.Width);
            ballXDir = +1;


        }
        if (ballYPos < 0)
        {
            ballYPos = +ballYPos;
            ballYDir = +1;

        }
      if (ballYPos > 700 - ballimg.Height)
      {
          Ballvisible = false;
      }


  }
  if (Ballvisible == false)
  {

      ballSpeed = 3;
      ballXDir = -1;
      ballYDir = -1;

      ballXPos = 450;
      ballYPos = 590;
      ballFired = false;
      Ballvisible = true;
  }



}

但是一旦发生碰撞，球会成功地从另一个精灵（玩家球拍）反弹，但是程序似乎忽略了这个代码并且球将直接离开屏幕。

碰撞代码：

  // paddle collison detection 
            if   
   (  gameball.PositionRectangle_ball.Intersects(paddle.PositionRectangle_paddle))
            {

     collision_paddle = true; 
                gameball.CheckCollision(collision_paddle); // passes the collision bool value 
            }

Answer 1

您似乎忘了清除Is_hit标志。

如果您不需要在其他任何地方查看它，可以在发布的代码的第一个块中清除它：

if (Is_hit == true && ballFired == true )
{
    //collision here
    ballXPos = 960 - ballimg.Width - (ballXPos - 960 + ballimg.Width);
    ballXDir = +1;

    ballYDir = -1;
    Is_hit = false;
}

碰撞后，精灵会离屏

1 个答案: