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Fixed transformations when deleting second-to-last sub-volume of an object

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This commit is contained in:
Enrico Turri
2018-11-23 10:50:25 +01:00
parent 7fe7f33b80
commit 66a08be209
2 changed files with 76 additions and 13 deletions
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17
src/libslic3r/Model.cpp
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@@ -661,6 +661,23 @@ void ModelObject::delete_volume(size_t idx)
ModelVolumePtrs::iterator i = this->volumes.begin() + idx;
delete *i;
this->volumes.erase(i);
if (this->volumes.size() == 1)
{
// only one volume left
// center it and update the instances accordingly
// rationale: the volume may be shifted with respect to the object center and this may lead to wrong rotation and scaling
// when modifying the instance matrix of the derived GLVolume
ModelVolume* v = this->volumes.front();
v->center_geometry();
const Vec3d& vol_offset = v->get_offset();
for (ModelInstance* inst : this->instances)
{
inst->set_offset(inst->get_offset() + inst->get_matrix(true) * vol_offset);
}
v->set_offset(Vec3d::Zero());
}
this->invalidate_bounding_box();
}