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Cut: Fix modifier transformation

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This commit is contained in:
Vojtech Kral 2018-12-07 12:36:30 +01:00
parent 0c7c9d5754
commit c23c09c453
1 changed files with 10 additions and 2 deletions
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12
src/libslic3r/Model.cpp
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@ -987,6 +987,8 @@ bool ModelObject::needed_repair() const
ModelObjectPtrs ModelObject::cut(size_t instance, coordf_t z, bool keep_upper, bool keep_lower, bool rotate_lower)
{
if (!keep_upper && !keep_lower) { return {}; }
// Clone the object to duplicate instances, materials etc.
ModelObject* upper = keep_upper ? ModelObject::new_clone(*this) : nullptr;
ModelObject* lower = keep_lower ? ModelObject::new_clone(*this) : nullptr;
@ -1024,15 +1026,21 @@ ModelObjectPtrs ModelObject::cut(size_t instance, coordf_t z, bool keep_upper, b
std::vector<BoundingBoxf3> lower_bboxes { instances.size() };
for (ModelVolume *volume : volumes) {
const auto volume_matrix = volume->get_matrix();
if (! volume->is_model_part()) {
// Don't cut modifiers
// Modifiers are not cut, but we still need to add the instance transformation
// to the modifier volume transformation to preserve their shape properly.
volume->set_transformation(Geometry::Transformation(instance_matrix * volume_matrix));
if (keep_upper) { upper->add_volume(*volume); }
if (keep_lower) { lower->add_volume(*volume); }
} else {
TriangleMesh upper_mesh, lower_mesh;
// Transform the mesh by the combined transformation matrix
volume->mesh.transform(instance_matrix * volume->get_matrix());
volume->mesh.transform(instance_matrix * volume_matrix);
// Perform cut
TriangleMeshSlicer tms(&volume->mesh);