CGAL users discussion list

[stiklaz <>]

Hello,

i have mesh  mesh_to_cut.off
<http://cgal-discuss.949826.n4.nabble.com/file/t376212/mesh_to_cut.off>  
and i want to cut two ends from it  cut_end_1.off
<http://cgal-discuss.949826.n4.nabble.com/file/t376212/cut_end_1.off>   and 
cut_end_2.off
<http://cgal-discuss.949826.n4.nabble.com/file/t376212/cut_end_2.off>   .

so i am using
CGAL::Polygon_mesh_processing::corefine_and_compute_difference(..).

when i cut single end: 
CGAL::Polygon_mesh_processing::corefine_and_compute_difference(*mesh_to_cut,
*cut_end_1, *result);
or
CGAL::Polygon_mesh_processing::corefine_and_compute_difference(*mesh_to_cut,
*cut_end_2, *result);

i get correct result mesh with single cut end.

If i try to cut second end using result mesh from firs call:
CGAL::Polygon_mesh_processing::corefine_and_compute_difference(*mesh_to_cut,
*cut_end_1, *mesh_to_cut_2nd_end);

mesh_to_cut_2nd_end.off
<http://cgal-discuss.949826.n4.nabble.com/file/t376212/mesh_to_cut_2nd_end.off>
  

CGAL::Polygon_mesh_processing::corefine_and_compute_difference(*mesh_to_cut_2nd_end,
*cut_end_2, *result);

i get empty result shape and return false ( tm1_minus_tm2_is_valid()  ==
false )

I can not understand, what causes this failure. After first cut mesh end for
second cut is not even touched but somehow it is distorted and not valid for
second cut.

Maybe I'm doing something wrong?




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