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Chipmunk Physics • View topic - Save Space

Save Space

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Save Space

Postby eggplantanimation » Thu Apr 08, 2010 4:35 pm

Is there an easy way to save/pickle all the objects in a space? THIS IS VERY URGENT :oops:
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Re: Save Space

Postby slembcke » Thu Apr 08, 2010 7:36 pm

Sort of. If you save all the bodies (position, rotation, velocity, etc), shapes, and joints you have in the world you will be able to reload a space with them manually. You would have to do this yourself anyway in order to sync up your objects with the Chipmunk ones when you deserialize everything. Chipmunk also has a bunch of internal state like tracking active collisions and such. There is no API to save this, and adding one would be difficult.

So yes, you can save the state of a space, but not perfectly. For most purposes, saving the body, shape and joint placement will be good enough.
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Re: Save Space

Postby eggplantanimation » Thu Apr 08, 2010 7:46 pm

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Re: Save Space

Postby eggplantanimation » Wed Apr 14, 2010 4:25 pm

Please people, I really need help on this!
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Re: Save Space

Postby slembcke » Wed Apr 14, 2010 5:25 pm

Did you see this post from just a day or two ago?
viewtopic.php?f=1&t=968
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Re: Save Space

Postby eggplantanimation » Wed Apr 14, 2010 7:36 pm

That looks like exactly what I want, but it is C++, not python! Do you think it will make it into the next pymunk?
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Re: Save Space

Postby viblo » Sun Apr 18, 2010 8:22 am

http://www.pymunk.org - A python library built on top of Chipmunk to let you easily get cool 2d physics in your python game/app
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Re: Save Space

Postby eggplantanimation » Wed Aug 18, 2010 11:24 am

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Re: Save Space

Postby slembcke » Wed Aug 18, 2010 1:11 pm

I see that you are doing something with calculating the polygon center. It's possible that your center of gravity is off. That could cause the objects to move around somewhat randomly. I would double check that first.
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Re: Save Space

Postby eggplantanimation » Fri Aug 20, 2010 9:15 pm

Thanks! I figured it out! :D
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