WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/libslic3r/TriangleMesh.hpp

@@ -0,0 +1,199 @@
+#ifndef slic3r_TriangleMesh_hpp_
+#define slic3r_TriangleMesh_hpp_
+
+#include "libslic3r.h"
+#include <admesh/stl.h>
+#include <functional>
+#include <vector>
+#include <boost/thread.hpp>
+#include "BoundingBox.hpp"
+#include "Line.hpp"
+#include "Point.hpp"
+#include "Polygon.hpp"
+#include "ExPolygon.hpp"
+
+namespace Slic3r {
+
+class TriangleMesh;
+class TriangleMeshSlicer;
+typedef std::vector<TriangleMesh*> TriangleMeshPtrs;
+
+class TriangleMesh
+{
+public:
+    TriangleMesh() : repaired(false) { stl_initialize(&this->stl); }
+    TriangleMesh(const Pointf3s &points, const std::vector<Vec3crd> &facets);
+    TriangleMesh(const TriangleMesh &other) : repaired(false) { stl_initialize(&this->stl); *this = other; }
+    TriangleMesh(TriangleMesh &&other) : repaired(false) { stl_initialize(&this->stl); this->swap(other); }
+    ~TriangleMesh() { stl_close(&this->stl); }
+    TriangleMesh& operator=(const TriangleMesh &other);
+    TriangleMesh& operator=(TriangleMesh &&other) { this->swap(other); return *this; }
+    void swap(TriangleMesh &other) { std::swap(this->stl, other.stl); std::swap(this->repaired, other.repaired); }
+    void ReadSTLFile(const char* input_file) { stl_open(&stl, input_file); }
+    void write_ascii(const char* output_file) { stl_write_ascii(&this->stl, output_file, ""); }
+    void write_binary(const char* output_file) { stl_write_binary(&this->stl, output_file, ""); }
+    void repair();
+    float volume();
+    void check_topology();
+    bool is_manifold() const { return this->stl.stats.connected_facets_3_edge == this->stl.stats.number_of_facets; }
+    void WriteOBJFile(char* output_file);
+    void scale(float factor);
+    void scale(const Vec3d &versor);
+    void translate(float x, float y, float z);
+    void rotate(float angle, const Axis &axis);
+    void rotate(float angle, const Vec3d& axis);
+    void rotate_x(float angle) { this->rotate(angle, X); }
+    void rotate_y(float angle) { this->rotate(angle, Y); }
+    void rotate_z(float angle) { this->rotate(angle, Z); }
+    void mirror(const Axis &axis);
+    void mirror_x() { this->mirror(X); }
+    void mirror_y() { this->mirror(Y); }
+    void mirror_z() { this->mirror(Z); }
+    void transform(const Transform3f& t);
+    void align_to_origin();
+    void rotate(double angle, Point* center);
+    TriangleMeshPtrs split() const;
+    void merge(const TriangleMesh &mesh);
+    ExPolygons horizontal_projection() const;
+    const float* first_vertex() const;
+    Polygon convex_hull();
+    BoundingBoxf3 bounding_box() const;
+    // Returns the bbox of this TriangleMesh transformed by the given transformation
+    BoundingBoxf3 transformed_bounding_box(const Transform3d& t) const;
+    // Returns the convex hull of this TriangleMesh
+    TriangleMesh convex_hull_3d() const;
+    void reset_repair_stats();
+    bool needed_repair() const;
+    size_t facets_count() const { return this->stl.stats.number_of_facets; }
+
+    // Returns true, if there are two and more connected patches in the mesh.
+    // Returns false, if one or zero connected patch is in the mesh.
+    bool has_multiple_patches() const;
+
+    // Count disconnected triangle patches.
+    size_t number_of_patches() const;
+
+    mutable stl_file stl;
+    bool repaired;
+    
+private:
+    void require_shared_vertices();
+    friend class TriangleMeshSlicer;
+};
+
+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;
+
+class TriangleMeshSlicer
+{
+public:
+    typedef std::function<void()> throw_on_cancel_callback_type;
+    TriangleMeshSlicer() : mesh(nullptr) {}
+    // Not quite nice, but the constructor and init() methods require non-const mesh pointer to be able to call mesh->require_shared_vertices()
+	TriangleMeshSlicer(TriangleMesh* mesh) { this->init(mesh, [](){}); }
+    void init(TriangleMesh *mesh, throw_on_cancel_callback_type throw_on_cancel);
+    void slice(const std::vector<float> &z, std::vector<Polygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;
+    void slice(const std::vector<float> &z, std::vector<ExPolygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;
+    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;
+    
+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;
+
+    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, ExPolygons* slices) const;
+    void make_expolygons_simple(std::vector<IntersectionLine> &lines, ExPolygons* slices) const;
+    void make_expolygons(std::vector<IntersectionLine> &lines, ExPolygons* slices) const;
+};
+
+TriangleMesh make_cube(double x, double y, double z);
+
+// Generate a TriangleMesh of a cylinder
+TriangleMesh make_cylinder(double r, double h, double fa=(2*PI/360));
+
+TriangleMesh make_sphere(double rho, double fa=(2*PI/360));
+
+}
+
+#endif