is there a proper way to limit the speed of a p2 body?

[valueerror]

there are several occations where my player gets faster and faster all the time without limit..  (this is on purpose but it shouldn't end up in lightspeed..  a velocity of 800-1000 would be more than enough)

 

how would i define such a limit and make sure it's applied?

 

thx in advance

[valueerror]

I use a limiting function inside the update loop. The correct way would be to place the limiting function somewhere inside p2's substep loop which is called multiple times (10 by default) during a single render update. The constraining happens far too late in the update loop and that's why you might run into tunneling or some kind of jittering especially during lower frame rates. It should be fine in most cases so it's worth a try.

 

Here a small example based on the mentioned thrust example:

http://jsfiddle.net/sh036s95/

 

Regards

George

 

 

 

and here is the code:

 

function constrainVelocity(sprite, maxVelocity) {  var body = sprite.body  var angle, currVelocitySqr, vx, vy;  vx = body.data.velocity[0];  vy = body.data.velocity[1];  currVelocitySqr = vx * vx + vy * vy;  if (currVelocitySqr > maxVelocity * maxVelocity) {    angle = Math.atan2(vy, vx);    vx = Math.cos(angle) * maxVelocity;    vy = Math.sin(angle) * maxVelocity;    body.data.velocity[0] = vx;    body.data.velocity[1] = vy;    console.log('limited speed to: '+maxVelocity);  }};

 

 constrainVelocity(sprite, 200);

[Wavertron]

Handy little method that. Good to know if I need in future.