3D-printing/OrcaSlicer
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WIP: Reworked slicing

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1) Slicing code moved to TriangleMeshSlicer.cpp,hpp from TriangleMesh.cpp,hpp
2) Refactored to use as little as possible of admesh.
This commit is contained in:
Vojtech Bubnik 2021-05-17 20:25:59 +02:00
parent 68d2427a34
commit 308d6b7809
24 changed files with 1828 additions and 1594 deletions
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193
src/libslic3r/TriangleMesh.hpp
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@ -5,7 +5,6 @@
#include <admesh/stl.h>
#include <functional>
#include <vector>
#include <boost/thread.hpp>
#include "BoundingBox.hpp"
#include "Line.hpp"
#include "Point.hpp"
@ -24,7 +23,7 @@ public:
TriangleMesh() : repaired(false) {}
TriangleMesh(const Pointf3s &points, const std::vector<Vec3i> &facets);
explicit TriangleMesh(const indexed_triangle_set &M);
void clear() { this->stl.clear(); this->its.clear(); this->repaired = false; }
void clear() { this->stl.clear(); this->its.clear(); this->repaired = false; }
bool ReadSTLFile(const char* input_file) { return stl_open(&stl, input_file); }
bool write_ascii(const char* output_file) { return stl_write_ascii(&this->stl, output_file, ""); }
bool write_binary(const char* output_file) { return stl_write_binary(&this->stl, output_file, ""); }
@ -47,7 +46,7 @@ public:
void mirror_y() { this->mirror(Y); }
void mirror_z() { this->mirror(Z); }
void transform(const Transform3d& t, bool fix_left_handed = false);
void transform(const Matrix3d& t, bool fix_left_handed = false);
void transform(const Matrix3d& t, bool fix_left_handed = false);
void align_to_origin();
void rotate(double angle, Point* center);
TriangleMeshPtrs split() const;
@ -62,7 +61,7 @@ public:
// Return the size of the mesh in coordinates.
Vec3d size() const { return stl.stats.size.cast<double>(); }
/// Return the center of the related bounding box.
Vec3d center() const { return this->bounding_box().center(); }
Vec3d center() const { return this->bounding_box().center(); }
// Returns the convex hull of this TriangleMesh
TriangleMesh convex_hull_3d() const;
// Slice this mesh at the provided Z levels and return the vector
@ -78,8 +77,8 @@ public:
size_t memsize() const;
// Release optional data from the mesh if the object is on the Undo / Redo stack only. Returns the amount of memory released.
size_t release_optional();
// Restore optional data possibly released by release_optional().
void restore_optional();
// Restore optional data possibly released by release_optional().
void restore_optional();
stl_file stl;
indexed_triangle_set its;
@ -92,160 +91,16 @@ private:
// Create an index of faces belonging to each vertex. The returned vector can
// be indexed with vertex indices and contains a list of face indices for each
// vertex.
std::vector< std::vector<size_t> >
create_neighbor_index(const indexed_triangle_set &its);
std::vector<std::vector<size_t>> create_vertex_faces_index(const indexed_triangle_set &its);
enum FacetEdgeType {
// A general case, the cutting plane intersect a face at two different edges.
feGeneral,
// Two vertices are aligned with the cutting plane, the third vertex is below the cutting plane.
feTop,
// Two vertices are aligned with the cutting plane, the third vertex is above the cutting plane.
feBottom,
// All three vertices of a face are aligned with the cutting plane.
feHorizontal
};
class IntersectionReference
{
public:
IntersectionReference() : point_id(-1), edge_id(-1) {}
IntersectionReference(int point_id, int edge_id) : point_id(point_id), edge_id(edge_id) {}
// Where is this intersection point located? On mesh vertex or mesh edge?
// Only one of the following will be set, the other will remain set to -1.
// Index of the mesh vertex.
int point_id;
// Index of the mesh edge.
int edge_id;
};
class IntersectionPoint : public Point, public IntersectionReference
{
public:
IntersectionPoint() {}
IntersectionPoint(int point_id, int edge_id, const Point &pt) : IntersectionReference(point_id, edge_id), Point(pt) {}
IntersectionPoint(const IntersectionReference &ir, const Point &pt) : IntersectionReference(ir), Point(pt) {}
// Inherits coord_t x, y
};
class IntersectionLine : public Line
{
public:
IntersectionLine() : a_id(-1), b_id(-1), edge_a_id(-1), edge_b_id(-1), edge_type(feGeneral), flags(0) {}
bool skip() const { return (this->flags & SKIP) != 0; }
void set_skip() { this->flags |= SKIP; }
bool is_seed_candidate() const { return (this->flags & NO_SEED) == 0 && ! this->skip(); }
void set_no_seed(bool set) { if (set) this->flags |= NO_SEED; else this->flags &= ~NO_SEED; }
// Inherits Point a, b
// For each line end point, either {a,b}_id or {a,b}edge_a_id is set, the other is left to -1.
// Vertex indices of the line end points.
int a_id;
int b_id;
// Source mesh edges of the line end points.
int edge_a_id;
int edge_b_id;
// feGeneral, feTop, feBottom, feHorizontal
FacetEdgeType edge_type;
// Used by TriangleMeshSlicer::slice() to skip duplicate edges.
enum {
// Triangle edge added, because it has no neighbor.
EDGE0_NO_NEIGHBOR = 0x001,
EDGE1_NO_NEIGHBOR = 0x002,
EDGE2_NO_NEIGHBOR = 0x004,
// Triangle edge added, because it makes a fold with another horizontal edge.
EDGE0_FOLD = 0x010,
EDGE1_FOLD = 0x020,
EDGE2_FOLD = 0x040,
// The edge cannot be a seed of a greedy loop extraction (folds are not safe to become seeds).
NO_SEED = 0x100,
SKIP = 0x200,
};
uint32_t flags;
};
typedef std::vector<IntersectionLine> IntersectionLines;
typedef std::vector<IntersectionLine*> IntersectionLinePtrs;
enum class SlicingMode : uint32_t {
// Regular slicing, maintain all contours and their orientation.
Regular,
// Maintain all contours, orient all contours CCW, therefore all holes are being closed.
Positive,
// Orient all contours CCW and keep only the contour with the largest area.
// This mode is useful for slicing complex objects in vase mode.
PositiveLargestContour,
};
class TriangleMeshSlicer
{
public:
typedef std::function<void()> throw_on_cancel_callback_type;
TriangleMeshSlicer() : mesh(nullptr) {}
TriangleMeshSlicer(const TriangleMesh* mesh) { this->init(mesh, [](){}); }
void init(const TriangleMesh *mesh, throw_on_cancel_callback_type throw_on_cancel);
void slice(
const std::vector<float> &z, SlicingMode mode, size_t alternate_mode_first_n_layers, SlicingMode alternate_mode,
std::vector<Polygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;
void slice(const std::vector<float> &z, SlicingMode mode, std::vector<Polygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const
{ return this->slice(z, mode, 0, mode, layers, throw_on_cancel); }
void slice(
const std::vector<float> &z, SlicingMode mode, size_t alternate_mode_first_n_layers, SlicingMode alternate_mode, const float closing_radius,
std::vector<ExPolygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;
void slice(const std::vector<float> &z, SlicingMode mode, const float closing_radius,
std::vector<ExPolygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const
{ this->slice(z, mode, 0, mode, closing_radius, layers, throw_on_cancel); }
enum FacetSliceType {
NoSlice = 0,
Slicing = 1,
Cutting = 2
};
FacetSliceType slice_facet(float slice_z, const stl_facet &facet, const int facet_idx,
const float min_z, const float max_z, IntersectionLine *line_out) const;
void cut(float z, TriangleMesh* upper, TriangleMesh* lower) const;
void set_up_direction(const Vec3f& up);
private:
const TriangleMesh *mesh;
// Map from a facet to an edge index.
std::vector<int> facets_edges;
// Scaled copy of this->mesh->stl.v_shared
std::vector<stl_vertex> v_scaled_shared;
// Quaternion that will be used to rotate every facet before the slicing
Eigen::Quaternion<float, Eigen::DontAlign> m_quaternion;
// Whether or not the above quaterion should be used
bool m_use_quaternion = false;
void _slice_do(size_t facet_idx, std::vector<IntersectionLines>* lines, boost::mutex* lines_mutex, const std::vector<float> &z) const;
void make_loops(std::vector<IntersectionLine> &lines, Polygons* loops) const;
void make_expolygons(const Polygons &loops, const float closing_radius, ExPolygons* slices) const;
void make_expolygons_simple(std::vector<IntersectionLine> &lines, ExPolygons* slices) const;
void make_expolygons(std::vector<IntersectionLine> &lines, const float closing_radius, ExPolygons* slices) const;
};
inline void slice_mesh(
const TriangleMesh & mesh,
const std::vector<float> & z,
std::vector<Polygons> & layers,
TriangleMeshSlicer::throw_on_cancel_callback_type thr = nullptr)
{
if (mesh.empty()) return;
TriangleMeshSlicer slicer(&mesh);
slicer.slice(z, SlicingMode::Regular, &layers, thr);
}
inline void slice_mesh(
const TriangleMesh & mesh,
const std::vector<float> & z,
std::vector<ExPolygons> & layers,
float closing_radius,
TriangleMeshSlicer::throw_on_cancel_callback_type thr = nullptr)
{
if (mesh.empty()) return;
TriangleMeshSlicer slicer(&mesh);
slicer.slice(z, SlicingMode::Regular, closing_radius, &layers, thr);
}
// Map from a facet edge to a neighbor face index or -1 if no neighbor exists.
std::vector<int> create_face_neighbors_index(const indexed_triangle_set &its);
std::vector<int> create_face_neighbors_index(const indexed_triangle_set &its, std::function<void()> throw_on_cancel_callback);
// Remove degenerate faces, return number of faces removed.
int its_remove_degenerate_faces(indexed_triangle_set &its, bool shrink_to_fit = true);
// Remove vertices, which none of the faces references. Return number of freed vertices.
int its_compactify_vertices(indexed_triangle_set &its, bool shrink_to_fit = true);
void its_shrink_to_fit(indexed_triangle_set &its);
TriangleMesh make_cube(double x, double y, double z);
@ -259,21 +114,21 @@ TriangleMesh make_sphere(double rho, double fa=(2*PI/360));
// Serialization through the Cereal library
#include <cereal/access.hpp>
namespace cereal {
template <class Archive> struct specialize<Archive, Slic3r::TriangleMesh, cereal::specialization::non_member_load_save> {};
template<class Archive> void load(Archive &archive, Slic3r::TriangleMesh &mesh) {
template <class Archive> struct specialize<Archive, Slic3r::TriangleMesh, cereal::specialization::non_member_load_save> {};
template<class Archive> void load(Archive &archive, Slic3r::TriangleMesh &mesh) {
stl_file &stl = mesh.stl;
stl.stats.type = inmemory;
archive(stl.stats.number_of_facets, stl.stats.original_num_facets);
archive(stl.stats.number_of_facets, stl.stats.original_num_facets);
stl_allocate(&stl);
archive.loadBinary((char*)stl.facet_start.data(), stl.facet_start.size() * 50);
archive.loadBinary((char*)stl.facet_start.data(), stl.facet_start.size() * 50);
stl_get_size(&stl);
mesh.repair();
}
template<class Archive> void save(Archive &archive, const Slic3r::TriangleMesh &mesh) {
const stl_file& stl = mesh.stl;
archive(stl.stats.number_of_facets, stl.stats.original_num_facets);
archive.saveBinary((char*)stl.facet_start.data(), stl.facet_start.size() * 50);
}
}
template<class Archive> void save(Archive &archive, const Slic3r::TriangleMesh &mesh) {
const stl_file& stl = mesh.stl;
archive(stl.stats.number_of_facets, stl.stats.original_num_facets);
archive.saveBinary((char*)stl.facet_start.data(), stl.facet_start.size() * 50);
}
}
#endif