265 lines
11 KiB
C++
265 lines
11 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) {}
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TriangleMesh(const Pointf3s &points, const std::vector<Vec3i> &facets);
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explicit TriangleMesh(const indexed_triangle_set &M);
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void clear() { this->stl.clear(); this->its.clear(); this->repaired = false; }
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bool ReadSTLFile(const char* input_file) { return stl_open(&stl, input_file); }
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bool write_ascii(const char* output_file) { return stl_write_ascii(&this->stl, output_file, ""); }
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bool write_binary(const char* output_file) { return stl_write_binary(&this->stl, output_file, ""); }
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void repair(bool update_shared_vertices = true);
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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 == (int)this->stl.stats.number_of_facets; }
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void WriteOBJFile(const char* output_file) const;
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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 translate(const Vec3f &displacement);
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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, bool fix_left_handed = false);
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void transform(const Matrix3d& t, bool fix_left_handed = false);
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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 { return this->stl.facet_start.empty() ? nullptr : &this->stl.facet_start.front().vertex[0](0); }
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// 2D convex hull of a 3D mesh projected into the Z=0 plane.
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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 &trafo) const;
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// Return the size of the mesh in coordinates.
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Vec3d size() const { return stl.stats.size.cast<double>(); }
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/// Return the center of the related bounding box.
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Vec3d center() const { return this->bounding_box().center(); }
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// Returns the convex hull of this TriangleMesh
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TriangleMesh convex_hull_3d() const;
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// Slice this mesh at the provided Z levels and return the vector
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std::vector<ExPolygons> slice(const std::vector<double>& z);
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void reset_repair_stats();
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bool needed_repair() const;
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void require_shared_vertices();
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bool has_shared_vertices() const { return ! this->its.vertices.empty(); }
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size_t facets_count() const { return this->stl.stats.number_of_facets; }
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bool empty() const { return this->facets_count() == 0; }
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bool is_splittable() const;
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// Estimate of the memory occupied by this structure, important for keeping an eye on the Undo / Redo stack allocation.
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size_t memsize() const;
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// Release optional data from the mesh if the object is on the Undo / Redo stack only. Returns the amount of memory released.
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size_t release_optional();
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// Restore optional data possibly released by release_optional().
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void restore_optional();
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stl_file stl;
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indexed_triangle_set its;
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bool repaired;
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private:
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std::deque<uint32_t> find_unvisited_neighbors(std::vector<unsigned char> &facet_visited) const;
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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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enum class SlicingMode : uint32_t {
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// Regular slicing, maintain all contours and their orientation.
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Regular,
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// Maintain all contours, orient all contours CCW, therefore all holes are being closed.
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Positive,
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// Orient all contours CCW and keep only the contour with the largest area.
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// This mode is useful for slicing complex objects in vase mode.
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PositiveLargestContour,
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};
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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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TriangleMeshSlicer(const TriangleMesh* mesh) { this->init(mesh, [](){}); }
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void init(const TriangleMesh *mesh, throw_on_cancel_callback_type throw_on_cancel);
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void slice(const std::vector<float> &z, SlicingMode mode, std::vector<Polygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;
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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;
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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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void set_up_direction(const Vec3f& up);
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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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// Quaternion that will be used to rotate every facet before the slicing
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Eigen::Quaternion<float, Eigen::DontAlign> m_quaternion;
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// Whether or not the above quaterion should be used
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bool m_use_quaternion = false;
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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, const float closing_radius, 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, const float closing_radius, ExPolygons* slices) const;
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};
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inline void slice_mesh(
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const TriangleMesh & mesh,
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const std::vector<float> & z,
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std::vector<Polygons> & layers,
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TriangleMeshSlicer::throw_on_cancel_callback_type thr = nullptr)
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{
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if (mesh.empty()) return;
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TriangleMeshSlicer slicer(&mesh);
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slicer.slice(z, SlicingMode::Regular, &layers, thr);
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}
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inline void slice_mesh(
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const TriangleMesh & mesh,
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const std::vector<float> & z,
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std::vector<ExPolygons> & layers,
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float closing_radius,
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TriangleMeshSlicer::throw_on_cancel_callback_type thr = nullptr)
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{
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if (mesh.empty()) return;
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TriangleMeshSlicer slicer(&mesh);
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slicer.slice(z, SlicingMode::Regular, closing_radius, &layers, thr);
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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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// Serialization through the Cereal library
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#include <cereal/access.hpp>
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namespace cereal {
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template <class Archive> struct specialize<Archive, Slic3r::TriangleMesh, cereal::specialization::non_member_load_save> {};
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template<class Archive> void load(Archive &archive, Slic3r::TriangleMesh &mesh) {
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stl_file &stl = mesh.stl;
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stl.stats.type = inmemory;
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archive(stl.stats.number_of_facets, stl.stats.original_num_facets);
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stl_allocate(&stl);
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archive.loadBinary((char*)stl.facet_start.data(), stl.facet_start.size() * 50);
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stl_get_size(&stl);
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mesh.repair();
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}
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template<class Archive> void save(Archive &archive, const Slic3r::TriangleMesh &mesh) {
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const stl_file& stl = mesh.stl;
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archive(stl.stats.number_of_facets, stl.stats.original_num_facets);
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archive.saveBinary((char*)stl.facet_start.data(), stl.facet_start.size() * 50);
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}
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}
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#endif
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