diff options
| author | Marius Kintel <marius@kintel.net> | 2012-10-09 01:05:23 (GMT) |
|---|---|---|
| committer | Marius Kintel <marius@kintel.net> | 2012-10-09 01:05:23 (GMT) |
| commit | 08e7ce3036065e28fa79c37e7f4f343e6e2cb37d (patch) | |
| tree | b25b7dc176ffe125c9ed1c013ef3ab1f252ae401 /src/PolySetCGALEvaluator.cc | |
| parent | 087b9bb7c3462894acd5d527f32c4b43bedf6fdb (diff) | |
Catch CGAL assertion for projection nodes. Fixes #202
Diffstat (limited to 'src/PolySetCGALEvaluator.cc')
| -rw-r--r-- | src/PolySetCGALEvaluator.cc | 50 |
1 files changed, 28 insertions, 22 deletions
diff --git a/src/PolySetCGALEvaluator.cc b/src/PolySetCGALEvaluator.cc index 3b272d2..bca9902 100644 --- a/src/PolySetCGALEvaluator.cc +++ b/src/PolySetCGALEvaluator.cc @@ -122,30 +122,36 @@ PolySet *PolySetCGALEvaluator::evaluatePolySet(const ProjectionNode &node) CGAL_Nef_polyhedron nef_poly; - if (node.cut_mode) - { - // intersect 'sum' with the x-y plane - CGAL_Nef_polyhedron3::Plane_3 xy_plane = CGAL_Nef_polyhedron3::Plane_3( 0,0,1,0 ); - *sum.p3 = sum.p3->intersection( xy_plane, CGAL_Nef_polyhedron3::PLANE_ONLY); - - // Visit each polygon in sum.p3 and union/intersect into a 2d polygon (with holes) - // For info on Volumes, Shells, Facets, and the 'visitor' pattern, please see - // http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3/Chapter_main.html - NefShellVisitor_for_cut shell_visitor; - CGAL_Nef_polyhedron3::Volume_const_iterator i; - CGAL_Nef_polyhedron3::Shell_entry_const_iterator j; - CGAL_Nef_polyhedron3::SFace_const_handle sface_handle; - for ( i = sum.p3->volumes_begin(); i != sum.p3->volumes_end(); ++i ) { - for ( j = i->shells_begin(); j != i->shells_end(); ++j ) { - sface_handle = CGAL_Nef_polyhedron3::SFace_const_handle( j ); - sum.p3->visit_shell_objects( sface_handle , shell_visitor ); + if (node.cut_mode) { + CGAL::Failure_behaviour old_behaviour = CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION); + try { + // intersect 'sum' with the x-y plane + CGAL_Nef_polyhedron3::Plane_3 xy_plane = CGAL_Nef_polyhedron3::Plane_3( 0,0,1,0 ); + *sum.p3 = sum.p3->intersection( xy_plane, CGAL_Nef_polyhedron3::PLANE_ONLY); + + // Visit each polygon in sum.p3 and union/intersect into a 2d polygon (with holes) + // For info on Volumes, Shells, Facets, and the 'visitor' pattern, please see + // http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Nef_3/Chapter_main.html + NefShellVisitor_for_cut shell_visitor; + CGAL_Nef_polyhedron3::Volume_const_iterator i; + CGAL_Nef_polyhedron3::Shell_entry_const_iterator j; + CGAL_Nef_polyhedron3::SFace_const_handle sface_handle; + for ( i = sum.p3->volumes_begin(); i != sum.p3->volumes_end(); ++i ) { + for ( j = i->shells_begin(); j != i->shells_end(); ++j ) { + sface_handle = CGAL_Nef_polyhedron3::SFace_const_handle( j ); + sum.p3->visit_shell_objects( sface_handle , shell_visitor ); + } } + if (debug) std::cout << "shell visitor\n" << shell_visitor.dump() << "\nshell visitor end\n"; + + nef_poly.p2 = shell_visitor.output_nefpoly2d; + nef_poly.dim = 2; + if (debug) std::cout << "--\n" << nef_poly.dump_p2() << "\n"; + } + catch (const CGAL::Failure_exception &e) { + PRINTB("CGAL error in projection node: %s", e.what()); + return NULL; } - if (debug) std::cout << "shell visitor\n" << shell_visitor.dump() << "\nshell visitor end\n"; - - nef_poly.p2 = shell_visitor.output_nefpoly2d; - nef_poly.dim = 2; - if (debug) std::cout << "--\n" << nef_poly.dump_p2() << "\n"; // Extract polygons in the XY plane, ignoring all other polygons // FIXME: If the polyhedron is really thin, there might be unwanted polygons |