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Chipmunk Physics • View topic - [pymunk] Retrieve force from Arbiter when no gravity

[pymunk] Retrieve force from Arbiter when no gravity

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Re: [pymunk] Retrieve force from Arbiter when no gravity

Postby Angel » Mon Mar 07, 2016 10:45 am

OK, then. Thanks for all the answers.

However, it would be great to get a "pressure-like" value in those cases. When I have lots of body moving just because of overlap resolutions (no gravity, just new bodies that appeared on top of others) I need to be able to picture the pressure field of the world (i.e. impulses/forces applied to bodies). The overlap distance is not directly proportional. It keeps a proportionality somehow, but not direct.

If you could tell me a workaround, it would be very helpful.

Many thanks and congrats for all the job done!

A
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Re: [pymunk] Retrieve force from Arbiter when no gravity

Postby slembcke » Mon Mar 07, 2016 12:36 pm

Well, like I said, the information you are looking for does exist inside of Chipmunk, but you are going to need to write a little C code to access it using the private APIs.
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Re: [pymunk] Retrieve force from Arbiter when no gravity

Postby Angel » Tue Mar 08, 2016 8:18 am

OK.

I know this may be a bit too much, but... could you tell me where to start from? Should I touch cpArbiter.h/.c to any extent? Maybe altering the value returned by totalImpulse to add non-impulsed bodies? If you could tell me where to look for the answer I'll do my best to recover that value.

Many thanks!
A
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Re: [pymunk] Retrieve force from Arbiter when no gravity

Postby slembcke » Tue Mar 08, 2016 11:21 am

Can't sleep... Chipmunks will eat me...
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Re: [pymunk] Retrieve force from Arbiter when no gravity

Postby Angel » Thu Mar 10, 2016 3:23 pm

Great! That does it very easily. Quite an obvious note: instead of "n", use "con->n".
Many thanks,
A!
PS. If I need something different I am quite confident now with the internal resolution of overlaps. Thanks for all the comments!
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Re: [pymunk] Retrieve force from Arbiter when no gravity

Postby harianhargahp » Thu Oct 04, 2018 1:54 pm

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