Diballic Source

#1 Pong is allways fun :) Thanks for sharing.

I start playing and on first ball it go into an endless loop, while the ball LinearVelocityX was nearly 0. I restarted and when i nearly won it happend again. So i dig into the source and made following fix for this:

function ball::onCollision(%srcObject, %dstObject, %srcRef, %dstRef, %time, %normal, %contacts, %points)
{
   if(%dstObject.getName() $= "blockOne" || %dstObject.getName() $= "blockTwo")
   {
      %srcObject.blockBounce(%dstObject, %dstObject.getName());
      
      %srcObject.setPositionX(%srcObject.getPositionX() + (getWord(%normal, 0) / 4));
      %srcObject.setPositionY(%srcObject.getPositionY() + (getWord(%normal, 1) / 4));
   }
      
   if(%dstObject.class $= "boundary")
   {
[b]
      //XXTH  Test: playball.setLinearVelocityX(-0.001);playball.setLinearVelocityy(100);
      %xvelo=%srcObject.getLinearVelocityX();
      if (mAbs(%xvelo)<0.01) {
         %fixVelo = mGetSign(%xvelo)*5;
         if (%fixVelo == 0) %fixVelo = 5;  //maybe not correct direction but better than endless game.
         %srcObject.setLinearVelocityX(%fixVelo);
      }
[/b]

      %srcObject.setPositionX(%srcObject.getPositionX() + (getWord(%normal, 0) / 4));
      %srcObject.setPositionY(%srcObject.getPositionY() + (getWord(%normal, 1) / 4));
   }
      
   //if(%dstObject.class $= "bottomBoundary")
      //%srcObject.setPositionY(%srcObject.getPositionY() - 0.5);
}

#2 Hmm. Interesting. I have had the ball's x velocity greatly reduced when the ball hits a corner before, but its always been still been definitely moving. Interesting solution though basically, as you said, it just makes sure that the ball's x velocity doesn't go to zero. I guess you didn't read the "dontreadme.doc" as it tells you the keys in there; "o" is a re-serve.

It may be better to use the %normal -- which could be used as a ratio between x and y. The problem may be that the corner velocity just isn't enough. Thus, check if the %normal isn't a horizontal or vertical, and if it isn't, double the polar velocity. I'll have to look into it.

#3 Kevin - did you yank this? Url doesn't work (404 error), here or non-source version on blog.

#4 Witchcraft!

#5 It should work now.