CGAL users discussion list

["samuel kim" <>]

Hell all,

I want to know how to remove this unexpected case. When get a facet normal
vector from Halfedge, occasionally, some normal vectors returns -1.#IND00.
Is this meaning that no nomal vector is on the facet? If so, what is the
condition to avoid the facet that has no normal vector? Thank you.

Example)        
Vector Norm = pHalfEdge->facet()->normal();
Norm[0] = -1.#IND00
Norm[1] = -1.#IND00
Norm[2] = -1.#IND00

Samuel