CGAL users discussion list

[Zohar <>]

Hi,

Instead of posting a few threads I thought to group my questions into one
thread.
My first two questions please:

        C3t3 c3t3;
        tet_generation(srcPoly, c3t3); // Uses 3D mesh generation where 
srcPoly is
a polyhedron

        // Triangulation 3
        typedef C3t3::Triangulation Tr3;
        typedef Tr3::Vertex_handle Vertex_handle;
        Tr3& tr = c3t3.triangulation();

        // Add points
        ...
        for ( int i = 0 ; i < nV ; i++ )
                tr.insert(GT::Point_3(V(0,i), V(1,i), V(2,i)));

        // draw tr facets
        vector<GT::Point_3> points;
        vector<int> tris;
        int vInd = 0;
        for ( Tr3::Finite_cells_iterator cit = tr.finite_cells_begin() 
                ; cit != tr.finite_cells_end() ; cit++ ) {
                for ( int ti = 0 ; ti < 4 ; ti++ ) {
                        for ( int i = 0 ; i < 3 ; i++ ) {
                                
points.push_back(cit->vertex((ti+i)%4)->point());
                                tris.push_back(vInd);
                                vInd++;
                        }
                }
        }
        MObject omesh = cgal2mesh(points, tris); // draws the facets


1. I just arbitrarily iterated the facets of a cell. How do I iterated them
such that they would have proper orientation (ccw)?

2. I'm working with the triangulation of the mesh generation. I understand
it's Regular_triangulation_3. When I add the new points, I get intersections
by very long faces, while I expected to get a clean delaunay triangulation.
Does the regular triangulation behaves differently (or perhaps I misused the
c3t3)? If it is, is there an easy way to convert it to delaunay?
The mesh generation generates a fine triangulation, and adding the points by
themselves also generates a fine triangulation. It is as if the two are
colliding.

Thanks







--
View this message in context: 
http://cgal-discuss.949826.n4.nabble.com/Triangulation-3-and-C3t3-questions-tp4655454.html
Sent from the cgal-discuss mailing list archive at Nabble.com.