Chipmunk Physics

Posted: **Sat May 12, 2012 12:29 pm**

We posted a preview of some of the new features coming in 6.1. I hope to have it ready to be released ASAP. I think I'm done with code changes, and am working on making sure the documentation is up to date.
http://howlingmoonsoftware.com/wordpress/?p=680

As always, the code is available now (Chipmunk Pro users too!) from Git for the people that are interested. More information on the Downloads page:
http://chipmunk-physics.net/downloads.php

After that is out I want to get back to making more example content. We've had too much contracting work lately, and I'm months behind on that (especially for the autogeometry). :-\

Posted: **Tue May 15, 2012 5:32 am**

Hello slembcke,

I have two questions:
1) Which branch has the C preview of Chipmunk 6.1 on git?
2) Are all public API function stable enough for writting a 6.1 Chipmunk wrapper?

Thanks
aisman

Posted: **Tue May 15, 2012 8:58 am**

It's the master branch.

There is only one issue that might cause API changes, best shown as a code example:

Code: Select all

// Vertexes passed to cpMomentForPoly() are not passed through cpConvexHull()
cpFloat moment = cpMomentForPoly(mass, numVerts, verts, cpvzero);
cpBody *body = cpBodyNew(mass, moment);

// Vertexes passed to cpPolyShapeNew() are...
cpShape *shape = cpPolyShapeNew(body, numVerts, verts, cpvzero);

So if you had a tight fitting concave shape for something, you probably would want the moment of inertia of the original shape even if it was going to have a convex hull made out of it. BUT! The problem I didn't think of at first was that if you pass completely crap vertexes to cpMomentForPoly(), bad things... It won't play nice if the winding is reversed or has an inconsistent winding so that it's self intersecting. I'm not sure what to do about it yet.

Chipmunk Physics

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