我在java的ping pong游戏中有球弹跳错误 [英] I have bouncing error with ball in ping pong game in java

问题描述

不幸的是球的运动是非常重复的，尽管有一些努力我不能在球界上反弹，所以我需要你的帮助：

  public   void  run（）{
 
  boolean  bounceBall = false; 
 
  while （true）{
 
  if  （ball_Service）{
 
  if （leftDisplacement&& ball_X> BALL_X_MIN）{
 
 bounceBall =（ ball_Y> = computerPaddle_Y&& ball_Y<（computerPaddle_Y + LENGTH_PADDLES））; 
 
 ball_X = ball_X  -  SPEED_BALL; 
 ball_Y = ball_Y  -  verticalDisplacement; 
 table.ballPosition（ball_X，ball_Y）; 
 
  if （ball_X< = PADDLES_COMPUTER_X&& bounceBall）{
 
 leftDisplacement = false; 
} 
} 
 
 如果（！leftDisplacement&& ball_X< = table.ball_x_max）{
 
 bounceBall =（ball_Y> = playerPaddle_Y&& ball_Y<（playerPaddle_Y + LENGTH_PADDLES））; 
 
 ball_X = ball_X + SPEED_BALL; 
 
 table.ballPosition（ball_X，ball_Y）; 
 
  if （ball_X> = table.place_paddles&& bounceBall）{
 
 leftDisplacement = true; 
} 
} 
 
  if （computerPaddle_Y< ball_Y&& computerPaddle_Y< table.down_Table）{ 
 
 computerPaddle_Y = computerPaddle_Y + SPEED_PADDLES; 
} 其他 如果（computerPaddle_Y> TOP_TABLE）{
 
 computerPaddle_Y = computerPaddle_Y  -  SPEED_PADDLES; 
} 
 
 table.computerMovementPaddle（computerPaddle_Y）; 
 
  if （ballInPlay（））{
 
  if （ball_X> table.ball_x_max）{
 
 score_computer ++; 
 displayScore（）; 
}  else   if （ball_X< BALL_X_MIN）{
 
 score_plyer ++; 
 displayScore（）; 
} 
} 
} 
 
 尝试 {
 
 Thread.sleep （table.slow_game）; 
}  catch （InterruptedException exception）{
 
 exception.printStackTrace（）; 
} 
} 
} 

解决方案

如果球移动出现问题，分数没有被更新然后错误很可能在你的ballInPlay（）函数中 - 因为如果返回false则分数不会改变。



或者可能有一些问题

 如果（ball_X >  table.ball_x_max）{
 
 score_computer ++; 
 displayScore（）; 
}  else   if （ball_X <  BALL_X_MIN）{
 
 score_plyer ++; 
 displayScore（）; 

，因为你似乎有table.ball_x_max和BALL_X_MIN - 你有没有想要table.ball_x_min？

unfortunately the ball movement is very repetitive, Despite of some effort I can not bounce the ball on the bounds, so I need your help:

public void run() {

        boolean bounceBall = false;

        while (true) {

            if (ball_Service) {

                if (leftDisplacement && ball_X > BALL_X_MIN) {

                    bounceBall = (ball_Y >= computerPaddle_Y && ball_Y < (computerPaddle_Y + LENGTH_PADDLES));

                    ball_X = ball_X - SPEED_BALL;
                    ball_Y = ball_Y - verticalDisplacement;
                    table.ballPosition(ball_X, ball_Y);

                    if (ball_X <= PADDLES_COMPUTER_X && bounceBall) {

                        leftDisplacement = false;
                    }
                }

                if (!leftDisplacement && ball_X <= table.ball_x_max) { 

                    bounceBall = (ball_Y >= playerPaddle_Y && ball_Y < (playerPaddle_Y + LENGTH_PADDLES));

                    ball_X = ball_X + SPEED_BALL;

                    table.ballPosition(ball_X, ball_Y);

                    if (ball_X >= table.place_paddles && bounceBall) {

                        leftDisplacement = true;
                    }
                }

                if (computerPaddle_Y < ball_Y && computerPaddle_Y < table.down_Table) {

                    computerPaddle_Y = computerPaddle_Y + SPEED_PADDLES;
                } else if (computerPaddle_Y > TOP_TABLE) {

                    computerPaddle_Y = computerPaddle_Y - SPEED_PADDLES;
                }

                table.computerMovementPaddle(computerPaddle_Y);

                if (ballInPlay()) {

                    if (ball_X > table.ball_x_max) {

                        score_computer++;
                        displayScore();
                    } else if (ball_X < BALL_X_MIN) {

                        score_plyer++;
                        displayScore();
                    }
                }
            }

            try {

                Thread.sleep(table.slow_game);
            } catch (InterruptedException exception) {

                exception.printStackTrace();
            }
        }
    }

解决方案

If there is a problem with the ball moving off and the score not being updated then the error is most likely in your ballInPlay() function - because if that returns false the score will not change.

Alternatively there may be some problem with

if (ball_X > table.ball_x_max) {

                      score_computer++;
                      displayScore();
                  } else if (ball_X < BALL_X_MIN) {

                      score_plyer++;
                      displayScore();

as you seem to have table.ball_x_max and BALL_X_MIN - did you maybe mean table.ball_x_min?

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