Triangulate a TopoDS_Shape...

Hi,
Here is how you can retrieve a triangulation of a TopoDS_Face object :

TopoDS_Face face = //load it

TopLoc_Location location;
Handle_Poly_Triangulation triangulation =
BRep_Tool::Triangulation (face, location);
const TColgp_Array1OfPnt& nodes = triangulation->Nodes ();
const Poly_Array1OfTriangle& triangles = triangulation->Triangles ();
// Iterate over the triangles and their nodes.
for (int i = triangles.Lower (); i <= triangles.Upper (); i++)
{
const Poly_Triangle& triangle = triangles (i);
const gp_Pnt& p1 = nodes (triangle (1));
const gp_Pnt& p2 = nodes (triangle (2));
const gp_Pnt& p3 = nodes (triangle (3));
// Do something with the current triangle's nodes
}

If you want to set the deflection of the triangulation, call this before iterating over the triangles :

BRepMesh::Mesh (face, 0.1); // deflection == 0.1 here