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a pong game

[5 Replies]
- 20-Nov-2010 03:03 AM
- Forum: Programming Questions
hi
i've tried to make a pong game but when the ball bounces a secound time off the wall, it goes straigt through the bar!

here is the code:

int a = 670;

float xpos, ypos;

float xrectpos, yrectpos;

float xspeed = 0.1;

float yspeed = 0.03;

float rectspeed = 0.1;

int rectdirection = 30;

int xdirection = 20;

int ydirection = 20;

void setup () {

  size (3*a/2,a);

  background (255,255,255);

  frameRate (30);

  smooth ();

  xpos = a*3/4;

  ypos = a*3/4;

  xrectpos = 14*a/10;

  yrectpos = a/3;

}

void keyPressed () {

  if (key == CODED) {

   if (keyCode == UP) {

   yrectpos = yrectpos + (rectdirection*rectspeed) * -1;

   } else if (keyCode == DOWN) {

   yrectpos = (yrectpos + (rectdirection*rectspeed));

   }

  }

}

void draw () {

  xpos = xpos + (xspeed*xdirection);

  ypos = ypos + (yspeed*ydirection);

  stroke(255, 255, 255);

  strokeWeight (10);

  ellipse (xpos + a/200, ypos + a/200, a/40, a/40);

  fill (#000000);

  strokeWeight (7);

  rect (xrectpos,yrectpos,a/50,a/5);



  if ((xpos == xrectpos) && (ypos > yrectpos) && (ypos < (yrectpos + a/5))) {

   xdirection *= -1.1;

   xspeed = xspeed * 1.0001;

  } else if (xpos < 0 ) {

   xdirection *= -1.1;

   xspeed = xspeed * 1.0001;

  } else if (ypos < 0 || ypos > a) {

   ydirection *= -1.1;

   yspeed = yspeed *1.0002;

  } else if (xpos > 3*a/2) {

   println ("You've lost!");

   exit ();

  }

}

can somebody help me, please?

gamemaker

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