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Speed-up of clipping plane

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This commit is contained in:
Lukas Matena 2021-08-11 15:06:29 +02:00
parent 9632e6fa6a
commit 3605016696
1 changed files with 8 additions and 8 deletions
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16
src/slic3r/GUI/MeshUtils.cpp
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@ -87,16 +87,16 @@ void MeshClipper::recalculate_triangles()
float height_mesh = m_plane.distance(m_trafo.get_offset()) * (up_noscale.norm()/up.norm());
// Now do the cutting
MeshSlicingParamsEx slicing_params;
MeshSlicingParams slicing_params;
slicing_params.trafo.rotate(Eigen::Quaternion<double, Eigen::DontAlign>::FromTwoVectors(up, Vec3d::UnitZ()));
assert(m_mesh->has_shared_vertices());
std::vector<ExPolygons> list_of_expolys = slice_mesh_ex(m_mesh->its, std::vector<float>{height_mesh}, slicing_params);
ExPolygons expolys = union_ex(slice_mesh(m_mesh->its, height_mesh, slicing_params));
if (m_negative_mesh && !m_negative_mesh->empty()) {
assert(m_negative_mesh->has_shared_vertices());
std::vector<ExPolygons> neg_polys = slice_mesh_ex(m_negative_mesh->its, std::vector<float>{height_mesh}, slicing_params);
list_of_expolys.front() = diff_ex(list_of_expolys.front(), neg_polys.front());
ExPolygons neg_expolys = union_ex(slice_mesh(m_negative_mesh->its, height_mesh, slicing_params));
expolys = diff_ex(expolys, neg_expolys);
}
// Triangulate and rotate the cut into world coords:
@ -131,7 +131,7 @@ void MeshClipper::recalculate_triangles()
if (std::abs(normal_old.dot(m_plane.get_normal().normalized())) > 0.99) {
// The cuts are parallel, show all or nothing.
if (offset < height_mesh)
list_of_expolys.front().clear();
expolys.clear();
} else {
// The cut is a horizontal plane defined by z=height_mesh.
// ax+by+e=0 is the line of intersection with the limiting plane.
@ -155,14 +155,14 @@ void MeshClipper::recalculate_triangles()
// from the cut. The coordinates must not overflow after the transform,
// make the rectangle a bit smaller.
coord_t size = (std::numeric_limits<coord_t>::max() - scale_(std::max(std::abs(e*a), std::abs(e*b)))) / 4;
ExPolygons ep {ExPolygon({Point(-size, 0), Point(size, 0), Point(size, 2*size), Point(-size, 2*size)})};
Polygons ep {Polygon({Point(-size, 0), Point(size, 0), Point(size, 2*size), Point(-size, 2*size)})};
ep.front().rotate(angle);
ep.front().translate(scale_(-e * a), scale_(-e * b));
list_of_expolys.front() = diff_ex(list_of_expolys.front(), ep.front());
expolys = diff_ex(expolys, ep);
}
}
m_triangles2d = triangulate_expolygons_2f(list_of_expolys[0], m_trafo.get_matrix().matrix().determinant() < 0.);
m_triangles2d = triangulate_expolygons_2f(expolys, m_trafo.get_matrix().matrix().determinant() < 0.);
m_vertex_array.release_geometry();
for (auto it=m_triangles2d.cbegin(); it != m_triangles2d.cend(); it=it+3) {