CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

I don't see any error here.
Try posting a minimal complete example showing the error
so that we can reproduce it. Maybe the error is not where
you think it is and selected parts are not relevant.

Sebastien

On 06/06/2018 10:02 AM, Lettuce wrote:
> Hello,
> firstly i use CGAL::poisson_suface_reconstruction_delaunay to creat a mesh
> here is the code
>
> CGAL::poisson_surface_reconstruction_delaunay
>                 (points.begin(), points.end(),
>                 CGAL::First_of_pair_property_map<Pwn>(),
>                 CGAL::Second_of_pair_property_map<Pwn>(),
>                 P, average_spacing);
>
> then i want to use opengl to rending it and the code is
>
> void gl_draw_facet(Polyhedron::Facet_iterator f){
>         Polyhedron::Halfedge_around_facet_circulator he = f->facet_begin();
>         do{
>          const Point& p = he->vertex()->point();
>                 glVertex3d(p.x(), p.y(), p.z());
>         } while (++he != f->facet_begin());
> }
>
> void drawPoint(){
>         Polyhedron::Vertex_iterator v;
>         Polyhedron::Facet_iterator f;
>         Polyhedron::Edge_iterator eit;
>         Polyhedron::Halfedge_handle h_handle;
>         double x, y, z;
>
>         CGAL::Polygon_mesh_processing::compute_normals(P,
>                 boost::make_assoc_property_map(vnormals),
>                 boost::make_assoc_property_map(fnormals));
>                 
>         glBegin(GL_TRIANGLES);
>                 for (f = P.facets_begin(); f != P.facets_end(); f++){
>                         xx = fnormals[f].x() / 
> sqrt((fnormals[f].x()*fnormals[f].x()) +
> (fnormals[f].y()*fnormals[f].y()) + (fnormals[f].z()*fnormals[f].z()));
>                         yy = fnormals[f].y() / 
> sqrt((fnormals[f].x()*fnormals[f].x()) +
> (fnormals[f].y()*fnormals[f].y()) + (fnormals[f].z()*fnormals[f].z()));
>                         zz = fnormals[f].z() / 
> sqrt((fnormals[f].x()*fnormals[f].x()) +
> (fnormals[f].y()*fnormals[f].y()) + (fnormals[f].z()*fnormals[f].z()));
>                         glNormal3f(xx, yy, zz);
>                         gl_draw_facet(f);
>                 }
>                 glEnd();        
> }
> but the result shows there is something wrong with the normals. here is the
> result
> <http://cgal-discuss.949826.n4.nabble.com/file/t375948/cat.png>
>
> i dont know what's wrong with my code.
>
> need help,thank you.
>
>
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/