(trimesh-trimesh) Re: [ODE] Difference Between Bodies and Geoms

[Chris Ledwith]

> Vadim Macagon wrote:
>>>I'm wondering if I need a seperate Geom for every object in the ODE
>>>simulation. This would be rather memory expensive especially since I
>>>plan to use TriMeshes. I'd like to be able to re-use a geom, like have
>>>several objects(bodies) with the geom.
>>
>> When you create the trimesh geom it doesn't copy the vertex/index data
>> you
>> pass to it, so there's nothing that prevents you from reusing the same
>> data
>> for multiple trimesh geoms (you only need one copy of that data).
>
> Note that this sadly doesn't hold any more if you use
> trimesh-vs-trimesh collisions -- I believe you can no longer
> share dTriMeshDataIDs between geoms because trimesh-vs-trimesh
> associates the essential previous-transform matrix with the
> TriMeshData rather than the TriMesh's geom.  That'd probably be
> a wise thing to fix at this point unless Jeffrey had a good reason
> to do it that way.
>
> --Adam
> --
> Adam D. Moss   . ,,^^   adam at gimp.org   http://www.foxbox.org/   co:3

I haven't looked into the trimesh-vs-trimesh support, so I didn't know
this. It is essential that this is looked into.

-Chris