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added transformation of normals

This commit is contained in:
Sven Oesau 2023-12-18 15:35:25 +01:00
parent 89d3d74865
commit 4fe88f8b49
1 changed files with 8 additions and 0 deletions
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8
Polyhedron/demo/Polyhedron/Plugins/PCA/Affine_transform_plugin.cpp
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@ -614,12 +614,20 @@ endPointSet(const QMatrix4x4& transform_matrix)
Point_set* new_ps = new_item->point_set(); Point_set* new_ps = new_item->point_set();
CGAL::qglviewer::Vec c = aff_transformed_item->center(); CGAL::qglviewer::Vec c = aff_transformed_item->center();
QMatrix3x3 normal_matrix = transform_matrix.normalMatrix();
for(Point_set::Index idx : *new_ps) for(Point_set::Index idx : *new_ps)
{ {
QVector3D vec = transform_matrix.map(QVector3D(new_ps->point(idx).x() - c.x, QVector3D vec = transform_matrix.map(QVector3D(new_ps->point(idx).x() - c.x,
new_ps->point(idx).y() - c.y, new_ps->point(idx).y() - c.y,
new_ps->point(idx).z() - c.z)); new_ps->point(idx).z() - c.z));
new_ps->point(idx) = Kernel::Point_3(vec.x(), vec.y(), vec.z()); new_ps->point(idx) = Kernel::Point_3(vec.x(), vec.y(), vec.z());
if (new_ps->has_normal_map()) {
QVector3D n(new_ps->normal(idx).x(), new_ps->normal(idx).y(), new_ps->normal(idx).z());
new_ps->normal(idx) = Kernel::Vector_3(normal_matrix(0, 0) * n[0] + normal_matrix(0, 1) * n[1] + normal_matrix(0, 2) * n[2],
normal_matrix(1, 0) * n[0] + normal_matrix(1, 1) * n[1] + normal_matrix(1, 2) * n[2],
normal_matrix(2, 0) * n[0] + normal_matrix(2, 1) * n[1] + normal_matrix(2, 2) * n[2]);
}
} }
new_item->setName(aff_transformed_item->name()); new_item->setName(aff_transformed_item->name());