static DT_ShapeHandle CreateShapeFromMesh(RAS_MeshObject* meshobj)
{
	DT_ShapeHandle shape = DT_NewComplexShape();
	int numpolys = meshobj->NumPolygons();
	int numvalidpolys = 0;
	
	for (int p=0; p<numpolys; p++)
	{
		RAS_Polygon* poly = meshobj->GetPolygon(p);
	
		// only add polygons that have the collisionflag set
		if (poly->IsCollider())
		{
			DT_Begin();
			for (int v=0; v<poly->VertexCount(); v++) {
				MT_Point3 pt = meshobj->GetVertex(poly->GetVertexIndexBase().m_vtxarray, 
												  poly->GetVertexIndexBase().m_indexarray[v],
												  poly->GetMaterial()->GetPolyMaterial())->xyz();
				DT_Vertex(pt[0],pt[1],pt[2]);
			}
			DT_End();
	
			numvalidpolys++;
		}
	}
	
	DT_EndComplexShape();
	
	if (numvalidpolys==0) {
		delete shape;
		return NULL;
	} else {
		return shape;
	}
}