[ODE] Trimesh related runtime error

[Tomek Zielinski]

After investigating call stact I figured out ther Opcode::FCMin3 is the
culprit.
Call stack is as follows:
callbac->opcode::collide->opcode::_colidee->opcode::triboxcol->fcmin3->exception 



so I guess sth is wrong with my tri data?

void CRendMesh::CreateTriMeshGeom( dGeomID &gid, dTriMeshDataID &tmid )
{
     tmid = dGeomTriMeshDataCreate();

     dGeomTriMeshDataBuildSingle(tmid, (float*)&pos[0].x, 12, pos.size(),
(const int*)&ind[0], ind.size(), 12 );
     gid = dCreateTriMesh( gSceneGraph->getODESpace(), tmid, 0,0,0);

//    gid = dCreateBox( gSceneGraph->getODESpace(), 20,20,7);

}

where pos and ind are valid vectors with continuos storage pool. I'll
keep trying to fix it but if you have any ideas feel free to share them


> Tomek Zielinski wrote:
> 
>> Hi everybody!
>>
>> Short piece of my code:
>>
>> #define MAX_CONTACTS 1000
>> dContactGeom contact_array_helper[MAX_CONTACTS], 
>> contact_array[MAX_CONTACTS];
>> unsigned int contact_num;
>>
>> // there are only a few geoms in my space so ythere is no need to test 
>> for spaces
>> void nearCallback(void *data, dGeomID o1, dGeomID o2)
>> {
>>
>>         // dwoch statykow nie kolidujemy
>> //        if(dGeomGetBody(o1)==0 && dGeomGetBody(o2)==0 )
>> //            return;
>>
>>         // colliding two non-space geoms, so generate contact points 
>> between o1 and o2
>>         int num_contact = dCollide( o1, o2, MAX_CONTACTS, 
>> contact_array_helper, sizeof(dContactGeom) ); // ODE ERROR
>>
>>         // add these contact points to the simulation
>>         for(unsigned int i=0; i<num_contact; i++)
>>             contact_array[contact_num++] = contact_array_helper[i];
>> }
>>
>>
>> ...
>> ...
>>
>> contact_num = 0;
>> dSpaceCollide( odeSpace, NULL, nearCallback );
>>
>>
>>
>>
>>
>> I checked my code and I'm almost sure that setup is done properly. But 
>> when two trimesh-bodies touches(even trimesh with box) i'm getting ODE 
>> error "invalid operation for geom in locked 
>> space(ode/src/collision_kernel.cpp:line301). So I checked it and it 
>> turned out that 'ode/src/collision_kernel.cpp:line301' is inside 
>> dGeomSetBody. I don't understand why dCollide calls dGeomSetBody - 
>> what am I doing wrong?
>>
>>
>> ----
>>
>> I've just figured out that ODE itself is calling dGeomSetBody only 
>> from dBodyDestroy, and dBodyDestroy is called only from 
>> dTestDataStructures() which seems to be an internl ODE function... So 
>> I'm a lot more confused...
>>
>>
>> -----
>>
>> I've just changed triMeshes into planes and boxes a
>> and now that error is gone and contact points are being generated...
>>
>>
>> -----
>>
>> So how can this runtime error happen?
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>>
> 
>