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Skip voxelization for csg meshes with positive parts only.

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This commit is contained in:
tamasmeszaros 2022-12-20 12:51:04 +01:00
parent 495a3f3557
commit d3a4edd37f
1 changed files with 40 additions and 7 deletions
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47
src/libslic3r/SLAPrintSteps.cpp
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@ -130,15 +130,49 @@ void SLAPrint::Steps::apply_printer_corrections(SLAPrintObject &po, SliceOrigin
}
}
template<class Cont> bool is_all_positive(const Cont &csgmesh)
{
bool is_all_pos =
std::all_of(csgmesh.begin(),
csgmesh.end(),
[](auto &part) {
return csg::get_operation(part) == csg::CSGType::Union;
});
return is_all_pos;
}
template<class Cont>
static indexed_triangle_set csgmesh_merge_positive_parts(const Cont &csgmesh)
{
indexed_triangle_set m;
for (auto &csgpart : csgmesh) {
auto op = csg::get_operation(csgpart);
const indexed_triangle_set * pmesh = csg::get_mesh(csgpart);
if (pmesh && op == csg::CSGType::Union) {
indexed_triangle_set mcpy = *pmesh;
its_transform(mcpy, csg::get_transform(csgpart));
its_merge(m, mcpy);
}
}
return m;
}
indexed_triangle_set SLAPrint::Steps::generate_preview_vdb(
SLAPrintObject &po, SLAPrintObjectStep step)
{
// Empirical upper limit to not get excessive performance hit
constexpr double MaxPreviewVoxelScale = 18.;
Benchmark bench;
bench.start();
// update preview mesh
double vscale = 1. / (1.5 * po.m_config.layer_height.getFloat());
double vscale = std::min(MaxPreviewVoxelScale,
1. / po.m_config.layer_height.getFloat());
auto voxparams = csg::VoxelizeParams{}
.voxel_scale(vscale)
.exterior_bandwidth(1.f)
@ -150,14 +184,13 @@ indexed_triangle_set SLAPrint::Steps::generate_preview_vdb(
auto r = range(po.m_mesh_to_slice);
auto m = indexed_triangle_set{};
if (r.size() > 1) {
if (r.size() > 1 && !is_all_positive(r)) {
auto grid = csg::voxelize_csgmesh(r, voxparams);
m = grid ? grid_to_mesh(*grid) : indexed_triangle_set{};
} else if (!r.empty()) {
m = *(csg::get_mesh(*r.begin()));
auto tr = csg::get_transform(*r.begin());
for (auto &v : m.vertices)
v = tr * v;
// float loss_less_max_error = 1e-6;
// its_quadric_edge_collapse(m, 0U, &loss_less_max_error);
} else {
m = csgmesh_merge_positive_parts(r);
}
bench.stop();