[ODE] trimesh collision + question

[Megan Fox]

OPCODE can handle "just collisions" between meshes fine... that is,
just detecting the collision, and the region of collision.  What
you'll have major troubles with is getting two dynamic trimesh objects
to behave when they collide with eachother.

I'm not sure which you wanted, but I assume the latter.

... this, of course, can make mobile trimesh objects troublesome in
general, since your world is very often a trimesh object itself (or at
the very least your terrain probably is).

-Megan Fox

On 5/6/05, patrick jayet <jayetp at student.ethz.ch> wrote:
> Hi everybody,
> 
> I would be interested to construct a model using trimesh. I have read on
> the mailinglist and in the doc that there are some issues, in particular
> with the collision detection.
> 
> Has anyone got the collision detection between trimesh to work? Is this
> possible to do? I've got errors with the 2 trimesh exemples, not
> possible to compile and link them (test_trimesh.cpp and
> test_movement_trimesh.cpp, [1]). I am under linux (make 3.80, gcc 3.3.5,
> ODE release 0.5).
> 
> Other question. Has anyone already used an object in ODE like a triangle
> with a certain thickness [2]? I wonder if I must absolutely implement it
> through a set of trimesh, if there is an easier solution, or if someone
> has already done a model in ode of sth like this.
> 
> Any idea welcome. ;-o
> Cheers,
> 
> Pat
> 
> [1] The link phase of test_trimesh.cpp give me the following error:
> 
> g++ -c -Wall -fno-rtti -fno-exceptions -Wall -fomit-frame-pointer
> -ffast-math -Iinclude   -DdNODEBUG -O2 -o ode/test/test_trimesh.o
> ode/test/test_trimesh.cpp
> g++ -o ode/test/test_trimesh.exe ode/test/test_trimesh.o lib/libode.a
> lib/libdrawstuff.a  -L/usr/X11R6/lib -L/usr/X11/lib -L/usr/lib/X11R6
> -L/usr/lib/X11 -lX11 -lGL -lGLU -lm
> ode/test/test_trimesh.o(.text+0x1540): In function `main':
> : undefined reference to `dGeomTriMeshDataCreate'
> ode/test/test_trimesh.o(.text+0x156e): In function `main':
> : undefined reference to `dGeomTriMeshDataBuildSimple'
> ode/test/test_trimesh.o(.text+0x1591): In function `main':
> : undefined reference to `dCreateTriMesh'
> collect2: ld returned 1 exit status
> make: *** [ode/test/test_trimesh.exe] Error 1
> 
> [2] The form would look like:
>    ___________
>    |\       /|
>     \\     //
>      \\   //
>       \\ //
>        \|/
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