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Tiny optimization of slice_mesh_slabs() with mirrored objects.

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This commit is contained in:
Vojtech Bubnik 2021-10-25 15:23:15 +02:00
parent 79eb59b9f2
commit 00c444f8c8
1 changed files with 2 additions and 2 deletions
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4
src/libslic3r/TriangleMeshSlicer.cpp
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@ -1919,7 +1919,7 @@ void slice_mesh_slabs(
#endif // EXPENSIVE_DEBUG_CHECKS #endif // EXPENSIVE_DEBUG_CHECKS
std::vector<stl_vertex> vertices_transformed = transform_mesh_vertices_for_slicing(mesh, trafo); std::vector<stl_vertex> vertices_transformed = transform_mesh_vertices_for_slicing(mesh, trafo);
const bool mirrored = trafo.matrix().determinant() < 0; const auto mirrored_sign = int64_t(trafo.matrix().block(0, 0, 3, 3).determinant() < 0 ? -1 : 1);
std::vector<FaceOrientation> face_orientation(mesh.indices.size(), FaceOrientation::Up); std::vector<FaceOrientation> face_orientation(mesh.indices.size(), FaceOrientation::Up);
for (const stl_triangle_vertex_indices &tri : mesh.indices) { for (const stl_triangle_vertex_indices &tri : mesh.indices) {
@ -1930,7 +1930,7 @@ void slice_mesh_slabs(
const Point a = to_2d(fa).cast<coord_t>(); const Point a = to_2d(fa).cast<coord_t>();
const Point b = to_2d(fb).cast<coord_t>(); const Point b = to_2d(fb).cast<coord_t>();
const Point c = to_2d(fc).cast<coord_t>(); const Point c = to_2d(fc).cast<coord_t>();
const int64_t d = cross2((b - a).cast<int64_t>(), (c - b).cast<int64_t>()) * (mirrored ? -1 : 1); const int64_t d = cross2((b - a).cast<int64_t>(), (c - b).cast<int64_t>()) * mirrored_sign;
FaceOrientation fo = FaceOrientation::Vertical; FaceOrientation fo = FaceOrientation::Vertical;
if (d > 0) if (d > 0)
fo = FaceOrientation::Up; fo = FaceOrientation::Up;