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SLA support points improvements

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- semi-intelligent algorithm to place support points
- enhanced ImGui dialog with editing/non-editing mode
- support points can have different head diameter (only implemented in GUI so far)
- autogenerated points supporting emerging islands are annotated and the info is kept
This commit is contained in:
Lukas Matena 2019-01-30 08:26:23 +01:00
parent f4243c694f
commit 21026ec9a8
16 changed files with 433 additions and 495 deletions
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43
src/libslic3r/SLA/SLAAutoSupports.hpp
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@ -15,30 +15,45 @@ public:
float density_at_horizontal;
float density_at_45;
float minimal_z;
///////////////
float support_force = 30; // a force one point can support (arbitrary force unit)
float tear_pressure = 1; // pressure that the display exerts (the force unit per mm2)
};
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; }
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<sla::SupportPoint>& output() { return m_output; }
private:
std::vector<Vec3d> m_output;
std::vector<Vec3d> m_normals;
TriangleMesh mesh;
static float angle_from_normal(const stl_normal& normal) { return acos((-normal.normalized())(2)); }
float get_required_density(float angle) const;
float distance_limit(float angle) const;
static float approximate_geodesic_distance(const Vec3d& p1, const Vec3d& p2, Vec3d& n1, Vec3d& n2);
std::vector<std::pair<ExPolygon, coord_t>> find_islands(const std::vector<ExPolygons>& slices, const std::vector<float>& heights) const;
void sprinkle_mesh(const TriangleMesh& mesh);
std::vector<Vec3d> uniformly_cover(const std::pair<ExPolygon, coord_t>& island);
void project_upward_onto_mesh(std::vector<Vec3d>& points) const;
std::vector<sla::SupportPoint> m_output;
#ifdef SLA_AUTOSUPPORTS_DEBUG
void output_expolygons(const ExPolygons& expolys, std::string filename) const;
void output_structures() const;
#endif /* SLA_AUTOSUPPORTS_DEBUG */
SLAAutoSupports::Config m_config;
struct Structure {
Structure(const ExPolygon& poly, float h) : height(h), unique_id(std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch())) {
polygon = &poly;
}
const ExPolygon* polygon = nullptr;
std::vector<const Structure*> structures_below;
float height = 0;
float supports_force = 0.f;
std::chrono::milliseconds unique_id;
};
std::vector<Structure> m_structures_old;
std::vector<Structure> m_structures_new;
float m_supports_force_total = 0.f;
void process(const std::vector<ExPolygons>& slices, const std::vector<float>& heights);
void add_point(const Point& point, Structure& structure, bool island = false);
void uniformly_cover(const ExPolygon& island, Structure& structure, bool is_new_island = false, bool just_one = false);
void project_onto_mesh(std::vector<sla::SupportPoint>& points) const;
std::function<void(void)> m_throw_on_cancel;
const Eigen::MatrixXd& m_V;
const Eigen::MatrixXi& m_F;