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SLA automatic support points: Added cancellation points.

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This commit is contained in:
bubnikv 2018-12-22 11:21:21 +01:00
parent 18beb10ae0
commit 0a3758d785
3 changed files with 21 additions and 4 deletions
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15
src/libslic3r/SLA/SLAAutoSupports.cpp
View file

@ -13,8 +13,9 @@
namespace Slic3r {
SLAAutoSupports::SLAAutoSupports(const TriangleMesh& mesh, const sla::EigenMesh3D& emesh, const std::vector<ExPolygons>& slices, const std::vector<float>& heights, const Config& config)
: m_config(config), m_V(emesh.V), m_F(emesh.F)
SLAAutoSupports::SLAAutoSupports(const TriangleMesh& mesh, const sla::EigenMesh3D& emesh, const std::vector<ExPolygons>& slices, const std::vector<float>& heights,
const Config& config, std::function<void(void)> throw_on_cancel)
: m_config(config), m_V(emesh.V), m_F(emesh.F), m_throw_on_cancel(throw_on_cancel)
{
// FIXME: It might be safer to get rid of the rand() calls altogether, because it is probably
// not always thread-safe and can be slow if it is.
@ -28,8 +29,10 @@ SLAAutoSupports::SLAAutoSupports(const TriangleMesh& mesh, const sla::EigenMesh3
// Uniformly cover each of the islands with support points.
for (const auto& island : islands) {
std::vector<Vec3d> points = uniformly_cover(island);
m_throw_on_cancel();
project_upward_onto_mesh(points);
m_output.insert(m_output.end(), points.begin(), points.end());
m_throw_on_cancel();
}
// We are done with the islands. Let's sprinkle the rest of the mesh.
@ -111,7 +114,14 @@ void SLAAutoSupports::sprinkle_mesh(const TriangleMesh& mesh)
// Angle at which the density reaches zero:
const float threshold_angle = std::min(M_PI_2, M_PI_4 * acos(0.f/m_config.density_at_horizontal) / acos(m_config.density_at_45/m_config.density_at_horizontal));
size_t cancel_test_cntr = 0;
while (refused_points < refused_limit) {
if (++ cancel_test_cntr == 500) {
// Don't call the cancellation routine too often as the multi-core cache synchronization
// may be pretty expensive.
m_throw_on_cancel();
cancel_test_cntr = 0;
}
// Place a random point on the mesh and calculate corresponding facet's normal:
Eigen::VectorXi FI;
Eigen::MatrixXd B;
@ -249,6 +259,7 @@ std::vector<std::pair<ExPolygon, coord_t>> SLAAutoSupports::find_islands(const s
//if (!islands.empty())
// output_expolygons(islands, "islands" + layer_num_str + ".svg");
#endif /* SLA_AUTOSUPPORTS_DEBUG */
m_throw_on_cancel();
}
return islands;

4
src/libslic3r/SLA/SLAAutoSupports.hpp
View file

@ -17,7 +17,8 @@ public:
float minimal_z;
};
SLAAutoSupports(const TriangleMesh& mesh, const sla::EigenMesh3D& emesh, const std::vector<ExPolygons>& slices, const std::vector<float>& heights, const Config& config);
SLAAutoSupports(const TriangleMesh& mesh, const sla::EigenMesh3D& emesh, const std::vector<ExPolygons>& slices,
const std::vector<float>& heights, const Config& config, std::function<void(void)> throw_on_cancel);
const std::vector<Vec3d>& output() { return m_output; }
private:
@ -38,6 +39,7 @@ private:
#endif /* SLA_AUTOSUPPORTS_DEBUG */
SLAAutoSupports::Config m_config;
std::function<void(void)> m_throw_on_cancel;
const Eigen::MatrixXd& m_V;
const Eigen::MatrixXi& m_F;
};

6
src/libslic3r/SLAPrint.cpp
View file

@ -514,6 +514,7 @@ void SLAPrint::process()
float(po.get_elevation()),
ilh, float(lh));
this->throw_if_canceled();
SLAAutoSupports::Config config;
const SLAPrintObjectConfig& cfg = po.config();
config.minimal_z = float(cfg.support_minimal_z);
@ -521,14 +522,17 @@ void SLAPrint::process()
config.density_at_horizontal = cfg.support_density_at_horizontal / 10000.f;
// Construction of this object does the calculation.
this->throw_if_canceled();
SLAAutoSupports auto_supports(po.transformed_mesh(),
po.m_supportdata->emesh,
po.get_model_slices(),
heights,
config);
config,
[this]() { throw_if_canceled(); });
// Now let's extract the result.
const std::vector<Vec3d>& points = auto_supports.output();
this->throw_if_canceled();
po.m_supportdata->support_points = sla::to_point_set(points);
}
else {