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Chipmunk Physics • View topic - Not wanting collision callbacks

Not wanting collision callbacks

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Not wanting collision callbacks

Postby iisystems2 » Thu Oct 01, 2009 12:07 pm

Hi,

I'm pretty sure at some point I had seen the ability in Chipmunk to define shape classes (cpShapeClass?) or possibly collision classes for the purpose of NOT receiving collision callbacks for shapes within the same shape/collision class. At the time, I didn't see the need for this, but now see I am constantly getting callbacks from overlapping static shapes in my game which I am routing to a one-line (return 0) callback, but nonetheless am incurring the overhead of the calls. Now that I'm looking for the information again, I can't find it either in the forums or in the documentaion.

Could someone please point me to info on how to define shapes into a common class so I will not receive callbacks on their collisions?

Thanks very much!

Scott
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Re: Not wanting collision callbacks

Postby maximile » Thu Oct 01, 2009 1:20 pm

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Re: Not wanting collision callbacks

Postby slembcke » Thu Oct 01, 2009 2:01 pm

Can't sleep... Chipmunks will eat me...
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Re: Not wanting collision callbacks

Postby iisystems2 » Thu Oct 01, 2009 7:03 pm

Thank you both maximile and slembcke! I knew I was getting callbacks I didn't want when nothing was moving, and sure enough, yes-- one of these shapes was not static (because I had the intent to make it move later) and I didn't look close enough. Nonetheless, cpShape.group was what I was looking for in general and I'm now making use of it.
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