add two new files to the repository:
Nef_3_problematic_construction.C
nine_planes.off
The former file contains a program to test the possibility of
building a Nef_polyhedron_3 from an OFF description read from a stream.
Several kernels can be tested with one run.
The second file contains a description of nine planes
in OFF format. Some of the planes intersect other planes.
Initially, this file is used for the test mentioned above.
The optional messages (verbose) were improved in both files:
OFF_to_nef_3.h
vertex_cycle_to_nef_3.h
Correction in OFF_to_nef_3.h:
old: V.reserve(NOI);
new: V_f.reserve(NOI);
Changes in vertex_cycle_to_nef_3.h
The meaning of the parameter 'normal' is now less mandatory.
Because of this, the structure of the funtion body slightly changed.