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199 lines
8 KiB
C++
199 lines
8 KiB
C++
#ifndef slic3r_TriangleMesh_hpp_
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#define slic3r_TriangleMesh_hpp_
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#include "libslic3r.h"
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#include <admesh/stl.h>
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#include <functional>
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#include <vector>
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#include <boost/thread.hpp>
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#include "BoundingBox.hpp"
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#include "Line.hpp"
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#include "Point.hpp"
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#include "Polygon.hpp"
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#include "ExPolygon.hpp"
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namespace Slic3r {
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class TriangleMesh;
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class TriangleMeshSlicer;
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typedef std::vector<TriangleMesh*> TriangleMeshPtrs;
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class TriangleMesh
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{
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public:
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TriangleMesh() : repaired(false) { stl_initialize(&this->stl); }
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TriangleMesh(const Pointf3s &points, const std::vector<Vec3crd> &facets);
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TriangleMesh(const TriangleMesh &other) : repaired(false) { stl_initialize(&this->stl); *this = other; }
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TriangleMesh(TriangleMesh &&other) : repaired(false) { stl_initialize(&this->stl); this->swap(other); }
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~TriangleMesh() { stl_close(&this->stl); }
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TriangleMesh& operator=(const TriangleMesh &other);
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TriangleMesh& operator=(TriangleMesh &&other) { this->swap(other); return *this; }
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void swap(TriangleMesh &other) { std::swap(this->stl, other.stl); std::swap(this->repaired, other.repaired); }
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void ReadSTLFile(const char* input_file) { stl_open(&stl, input_file); }
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void write_ascii(const char* output_file) { stl_write_ascii(&this->stl, output_file, ""); }
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void write_binary(const char* output_file) { stl_write_binary(&this->stl, output_file, ""); }
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void repair();
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float volume();
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void check_topology();
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bool is_manifold() const { return this->stl.stats.connected_facets_3_edge == this->stl.stats.number_of_facets; }
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void WriteOBJFile(char* output_file);
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void scale(float factor);
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void scale(const Vec3d &versor);
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void translate(float x, float y, float z);
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void rotate(float angle, const Axis &axis);
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void rotate(float angle, const Vec3d& axis);
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void rotate_x(float angle) { this->rotate(angle, X); }
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void rotate_y(float angle) { this->rotate(angle, Y); }
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void rotate_z(float angle) { this->rotate(angle, Z); }
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void mirror(const Axis &axis);
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void mirror_x() { this->mirror(X); }
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void mirror_y() { this->mirror(Y); }
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void mirror_z() { this->mirror(Z); }
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void transform(const Transform3d& t);
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void align_to_origin();
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void rotate(double angle, Point* center);
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TriangleMeshPtrs split() const;
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void merge(const TriangleMesh &mesh);
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ExPolygons horizontal_projection() const;
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const float* first_vertex() const;
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Polygon convex_hull();
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BoundingBoxf3 bounding_box() const;
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// Returns the bbox of this TriangleMesh transformed by the given transformation
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BoundingBoxf3 transformed_bounding_box(const Transform3d& t) const;
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// Returns the convex hull of this TriangleMesh
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TriangleMesh convex_hull_3d() const;
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void reset_repair_stats();
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bool needed_repair() const;
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size_t facets_count() const { return this->stl.stats.number_of_facets; }
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// Returns true, if there are two and more connected patches in the mesh.
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// Returns false, if one or zero connected patch is in the mesh.
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bool has_multiple_patches() const;
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// Count disconnected triangle patches.
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size_t number_of_patches() const;
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mutable stl_file stl;
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bool repaired;
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private:
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void require_shared_vertices();
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friend class TriangleMeshSlicer;
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};
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enum FacetEdgeType {
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// A general case, the cutting plane intersect a face at two different edges.
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feGeneral,
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// Two vertices are aligned with the cutting plane, the third vertex is below the cutting plane.
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feTop,
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// Two vertices are aligned with the cutting plane, the third vertex is above the cutting plane.
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feBottom,
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// All three vertices of a face are aligned with the cutting plane.
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feHorizontal
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};
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class IntersectionReference
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{
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public:
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IntersectionReference() : point_id(-1), edge_id(-1) {};
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IntersectionReference(int point_id, int edge_id) : point_id(point_id), edge_id(edge_id) {}
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// Where is this intersection point located? On mesh vertex or mesh edge?
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// Only one of the following will be set, the other will remain set to -1.
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// Index of the mesh vertex.
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int point_id;
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// Index of the mesh edge.
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int edge_id;
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};
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class IntersectionPoint : public Point, public IntersectionReference
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{
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public:
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IntersectionPoint() {};
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IntersectionPoint(int point_id, int edge_id, const Point &pt) : IntersectionReference(point_id, edge_id), Point(pt) {}
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IntersectionPoint(const IntersectionReference &ir, const Point &pt) : IntersectionReference(ir), Point(pt) {}
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// Inherits coord_t x, y
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};
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class IntersectionLine : public Line
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{
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public:
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IntersectionLine() : a_id(-1), b_id(-1), edge_a_id(-1), edge_b_id(-1), edge_type(feGeneral), flags(0) {}
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bool skip() const { return (this->flags & SKIP) != 0; }
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void set_skip() { this->flags |= SKIP; }
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bool is_seed_candidate() const { return (this->flags & NO_SEED) == 0 && ! this->skip(); }
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void set_no_seed(bool set) { if (set) this->flags |= NO_SEED; else this->flags &= ~NO_SEED; }
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// Inherits Point a, b
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// For each line end point, either {a,b}_id or {a,b}edge_a_id is set, the other is left to -1.
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// Vertex indices of the line end points.
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int a_id;
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int b_id;
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// Source mesh edges of the line end points.
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int edge_a_id;
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int edge_b_id;
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// feGeneral, feTop, feBottom, feHorizontal
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FacetEdgeType edge_type;
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// Used by TriangleMeshSlicer::slice() to skip duplicate edges.
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enum {
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// Triangle edge added, because it has no neighbor.
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EDGE0_NO_NEIGHBOR = 0x001,
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EDGE1_NO_NEIGHBOR = 0x002,
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EDGE2_NO_NEIGHBOR = 0x004,
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// Triangle edge added, because it makes a fold with another horizontal edge.
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EDGE0_FOLD = 0x010,
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EDGE1_FOLD = 0x020,
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EDGE2_FOLD = 0x040,
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// The edge cannot be a seed of a greedy loop extraction (folds are not safe to become seeds).
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NO_SEED = 0x100,
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SKIP = 0x200,
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};
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uint32_t flags;
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};
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typedef std::vector<IntersectionLine> IntersectionLines;
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typedef std::vector<IntersectionLine*> IntersectionLinePtrs;
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class TriangleMeshSlicer
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{
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public:
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typedef std::function<void()> throw_on_cancel_callback_type;
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TriangleMeshSlicer() : mesh(nullptr) {}
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// Not quite nice, but the constructor and init() methods require non-const mesh pointer to be able to call mesh->require_shared_vertices()
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TriangleMeshSlicer(TriangleMesh* mesh) { this->init(mesh, [](){}); }
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void init(TriangleMesh *mesh, throw_on_cancel_callback_type throw_on_cancel);
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void slice(const std::vector<float> &z, std::vector<Polygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;
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void slice(const std::vector<float> &z, std::vector<ExPolygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;
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enum FacetSliceType {
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NoSlice = 0,
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Slicing = 1,
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Cutting = 2
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};
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FacetSliceType slice_facet(float slice_z, const stl_facet &facet, const int facet_idx,
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const float min_z, const float max_z, IntersectionLine *line_out) const;
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void cut(float z, TriangleMesh* upper, TriangleMesh* lower) const;
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private:
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const TriangleMesh *mesh;
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// Map from a facet to an edge index.
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std::vector<int> facets_edges;
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// Scaled copy of this->mesh->stl.v_shared
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std::vector<stl_vertex> v_scaled_shared;
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void _slice_do(size_t facet_idx, std::vector<IntersectionLines>* lines, boost::mutex* lines_mutex, const std::vector<float> &z) const;
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void make_loops(std::vector<IntersectionLine> &lines, Polygons* loops) const;
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void make_expolygons(const Polygons &loops, ExPolygons* slices) const;
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void make_expolygons_simple(std::vector<IntersectionLine> &lines, ExPolygons* slices) const;
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void make_expolygons(std::vector<IntersectionLine> &lines, ExPolygons* slices) const;
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};
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TriangleMesh make_cube(double x, double y, double z);
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// Generate a TriangleMesh of a cylinder
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TriangleMesh make_cylinder(double r, double h, double fa=(2*PI/360));
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TriangleMesh make_sphere(double rho, double fa=(2*PI/360));
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}
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#endif
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