How to make ball spin while bouncing?

[woratana]

I know this could be quite stupid question, but I couldn't figure out how

 

So at the moment I have this ball bouncing around in the screen:

http://codepen.io/designil/pen/tEwog/

 

How can I make the ball rotate naturally when they are bouncing around?

 

Any hint would help

[valueerror]

in p2 physics you could (on collision) apply an angularForce depending on the current directon on the ball either cw or ccw...     but with p2 you wouldn't use a rectangle as physics body but a circle.. so i guess applying forces wouldn't even be necessary..  

[d13]

I'm not what the phaser syntax would be but here's the general formula:

  ball.rotation += ball.vx / ball.radius;

But you'll also need to add a bit of gravity and friction before you see the kind of natural spin I think you're looking for.

[woratana]

Thank you d13 !!

 

I tried your formula and it worked pretty good

I will neglect the gravity stuff for now.

 

You can see it in action here

http://codepen.io/designil/pen/tEwog/

[ZED]

Thanks, this is very useful and easy.