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FIX: update_sequential_clearance may crash due to clipper's bug

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m_hull_2d_cache must be set since later on we'll use its point number, which is a very large number when not inited.
This will cause a fatal out-of-memory error.

Jira: STUDIO-2452
Change-Id: I9b397a53bdcdf555eccf745f1b96786010ebe309
(cherry picked from commit 6802be53709649e75a1562d29e14559c766d427b)
This commit is contained in:
Arthur 2023-03-10 21:15:26 +08:00 • committed by Lane.Wei
parent 304e29529b
commit e4f6315da0
1 changed files with 10 additions and 10 deletions
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20
src/slic3r/GUI/GLCanvas3D.cpp
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@ -4964,20 +4964,20 @@ void GLCanvas3D::update_sequential_clearance()
for (size_t i = 0; i < m_model->objects.size(); ++i) {
ModelObject* model_object = m_model->objects[i];
ModelInstance* model_instance0 = model_object->instances.front();
auto tmp = offset(model_object->convex_hull_2d(Geometry::assemble_transform({ 0.0, 0.0, model_instance0->get_offset().z() }, model_instance0->get_rotation(),
model_instance0->get_scaling_factor(), model_instance0->get_mirror())),
Polygon hull_no_offset = model_object->convex_hull_2d(Geometry::assemble_transform({ 0.0, 0.0, model_instance0->get_offset().z() }, model_instance0->get_rotation(),
model_instance0->get_scaling_factor(), model_instance0->get_mirror()));
auto tmp = offset(hull_no_offset,
// Shrink the extruder_clearance_radius a tiny bit, so that if the object arrangement algorithm placed the objects
// exactly by satisfying the extruder_clearance_radius, this test will not trigger collision.
shrink_factor,
jtRound, mitter_limit);
if (!tmp.empty()) { // tmp may be empty due to clipper's bug, see STUDIO-2452
Polygon hull_2d = tmp.front();
Pointf3s& cache_hull_2d = m_sequential_print_clearance.m_hull_2d_cache.emplace_back(Pointf3s());
cache_hull_2d.reserve(hull_2d.points.size());
for (const Point& p : hull_2d.points) {
cache_hull_2d.emplace_back(unscale<double>(p.x()), unscale<double>(p.y()), 0.0);
}
}
Polygon hull_2d = !tmp.empty() ? tmp.front() : hull_no_offset;// tmp may be empty due to clipper's bug, see STUDIO-2452
Pointf3s& cache_hull_2d = m_sequential_print_clearance.m_hull_2d_cache.emplace_back(Pointf3s());
cache_hull_2d.reserve(hull_2d.points.size());
for (const Point& p : hull_2d.points) {
cache_hull_2d.emplace_back(unscale<double>(p.x()), unscale<double>(p.y()), 0.0);
}
}
m_sequential_print_clearance_first_displacement = false;
}