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Workaround to fix crash reported in #2209

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This commit is contained in:
Enrico Turri 2019-05-07 15:09:15 +02:00
parent 4418a9b926
commit 61a0ab4280
2 changed files with 10 additions and 2 deletions
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3
src/admesh/normals.cpp
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@ -108,6 +108,9 @@ stl_fix_normal_directions(stl_file *stl) {
if (stl->error) return; if (stl->error) return;
// this may happen for malformed models, see: https://github.com/prusa3d/Slic3r/issues/2209
if (stl->stats.number_of_facets == 0) return;
/* Initialize linked list. */ /* Initialize linked list. */
head = (struct stl_normal*)malloc(sizeof(struct stl_normal)); head = (struct stl_normal*)malloc(sizeof(struct stl_normal));
if(head == NULL) perror("stl_fix_normal_directions"); if(head == NULL) perror("stl_fix_normal_directions");

9
src/libslic3r/ModelArrange.cpp
View file

@ -567,8 +567,13 @@ ShapeData2D projectModelFromTop(const Slic3r::Model &model) {
Transform3d trafo_instance = Geometry::assemble_transform(Vec3d::Zero(), rotation, finst->get_scaling_factor(), finst->get_mirror()); Transform3d trafo_instance = Geometry::assemble_transform(Vec3d::Zero(), rotation, finst->get_scaling_factor(), finst->get_mirror());
Polygon p = objptr->convex_hull_2d(trafo_instance); Polygon p = objptr->convex_hull_2d(trafo_instance);
assert(! p.points.empty()); assert(! p.points.empty());
p.reverse();
assert(! p.is_counter_clockwise()); // this may happen for malformed models, see: https://github.com/prusa3d/Slic3r/issues/2209
if (p.points.empty())
continue;
p.reverse();
assert(!p.is_counter_clockwise());
p.append(p.first_point()); p.append(p.first_point());
clpath = Slic3rMultiPoint_to_ClipperPath(p); clpath = Slic3rMultiPoint_to_ClipperPath(p);
} }