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Physic Engine

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Yeah, ODE has some code that does Trimesh Collision, but It works good?
I don't think so. for example, try the rabbits demo on the moving trimesh tutorial.

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Guest Anonymous Poster
There isn't any physics engine out there supporting general tri mesh to tri mesh collision.
Expect for ODE but we all know what that is.
The best you can do is a course approximation of the geometry by placing convex hulls.

General triangular mesh intersection is a well-understood problem in computational geometry, however this is not sufficient for contact generation.

For example using intersection routines it is possible to calculate contacts but is also possible that those contacts are positions is such way that the generates an ill condition formulization of the contact constraint matrix. That is when two or more contacts are different but each one can be expressed as a linear combination of the others.

Example of that is a box hitting a plane edge on, in general you only need two contacts one each extreme, but if for example you get a contact in between, then the dynamics phase will have a very difficult time figuring out that contact is not essential to the calculation of the resting forces.

I guess this is why not physics engine maker take such risk. In general the implementer only go for what is safe.

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Quote:
Original post by Anonymous Poster
There isn't any physics engine out there supporting general tri mesh to tri mesh collision.


Of course there is.

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Quote:
Original post by MrRowl
Quote:
Original post by Anonymous Poster
There isn't any physics engine out there supporting general tri mesh to tri mesh collision.


Of course there is.


Novodex does...

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