diff options
Diffstat (limited to 'src/CGALEvaluator.cc')
| -rw-r--r-- | src/CGALEvaluator.cc | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/CGALEvaluator.cc b/src/CGALEvaluator.cc index 20c5d5e..60d98b8 100644 --- a/src/CGALEvaluator.cc +++ b/src/CGALEvaluator.cc @@ -61,6 +61,11 @@ void CGALEvaluator::process(CGAL_Nef_polyhedron &target, const CGAL_Nef_polyhedr if (target.dim != 2 && target.dim != 3) { assert(false && "Dimension of Nef polyhedron must be 2 or 3"); } + // Intersecting something with nothing results in nothing + if (src.isEmpty() && op == CGE_INTERSECTION) { + target = src; + return; + } if (src.isEmpty()) return; // Empty polyhedron. This can happen for e.g. square([0,0]) if (target.isEmpty() && op != CGE_UNION) return; // empty op <something> => empty if (target.dim != src.dim) return; // If someone tries to e.g. union 2d and 3d objects @@ -708,7 +713,7 @@ CGAL_Nef_polyhedron CGALEvaluator::evaluateCGALMesh(const PolySet &ps) PRINTB("Alternate construction failed. CGAL error in CGAL_Nef_polyhedron3(): %s", e.what()); } CGAL::set_error_behaviour(old_behaviour); - return CGAL_Nef_polyhedron(N); + if (N) return CGAL_Nef_polyhedron(N); } - return CGAL_Nef_polyhedron(); + return CGAL_Nef_polyhedron(ps.is2d?2:3); } |