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475 lines
17 KiB
C++
475 lines
17 KiB
C++
#ifndef slic3r_ExPolygon_hpp_
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#define slic3r_ExPolygon_hpp_
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#include "libslic3r.h"
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#include "Polygon.hpp"
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#include "Polyline.hpp"
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#include <vector>
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namespace Slic3r {
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class ExPolygon;
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typedef std::vector<ExPolygon> ExPolygons;
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class ExPolygon
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{
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public:
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ExPolygon() = default;
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ExPolygon(const ExPolygon &other) = default;
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ExPolygon(ExPolygon &&other) = default;
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explicit ExPolygon(const Polygon &contour) : contour(contour) {}
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explicit ExPolygon(Polygon &&contour) : contour(std::move(contour)) {}
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explicit ExPolygon(const Points &contour) : contour(contour) {}
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explicit ExPolygon(Points &&contour) : contour(std::move(contour)) {}
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explicit ExPolygon(const Polygon &contour, const Polygon &hole) : contour(contour) { holes.emplace_back(hole); }
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explicit ExPolygon(Polygon &&contour, Polygon &&hole) : contour(std::move(contour)) { holes.emplace_back(std::move(hole)); }
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explicit ExPolygon(const Points &contour, const Points &hole) : contour(contour) { holes.emplace_back(hole); }
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explicit ExPolygon(Points &&contour, Polygon &&hole) : contour(std::move(contour)) { holes.emplace_back(std::move(hole)); }
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ExPolygon(std::initializer_list<Point> contour) : contour(contour) {}
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ExPolygon(std::initializer_list<Point> contour, std::initializer_list<Point> hole) : contour(contour), holes({ hole }) {}
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ExPolygon& operator=(const ExPolygon &other) = default;
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ExPolygon& operator=(ExPolygon &&other) = default;
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Polygon contour;
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Polygons holes;
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operator Points() const;
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operator Polygons() const;
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operator Polylines() const;
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void clear() { contour.points.clear(); holes.clear(); }
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void scale(double factor);
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void translate(double x, double y) { this->translate(Point(coord_t(x), coord_t(y))); }
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void translate(const Point &vector);
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void rotate(double angle);
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void rotate(double angle, const Point ¢er);
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double area() const;
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bool empty() const { return contour.points.empty(); }
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bool is_valid() const;
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void douglas_peucker(double tolerance);
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// Contains the line / polyline / polylines etc COMPLETELY.
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bool contains(const Line &line) const;
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bool contains(const Polyline &polyline) const;
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bool contains(const Polylines &polylines) const;
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bool contains(const Point &point) const;
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bool contains_b(const Point &point) const;
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bool has_boundary_point(const Point &point) const;
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// Does this expolygon overlap another expolygon?
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// Either the ExPolygons intersect, or one is fully inside the other,
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// and it is not inside a hole of the other expolygon.
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bool overlaps(const ExPolygon &other) const;
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void simplify_p(double tolerance, Polygons* polygons) const;
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Polygons simplify_p(double tolerance) const;
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ExPolygons simplify(double tolerance) const;
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void simplify(double tolerance, ExPolygons* expolygons) const;
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void medial_axis(double max_width, double min_width, ThickPolylines* polylines) const;
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void medial_axis(double max_width, double min_width, Polylines* polylines) const;
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Lines lines() const;
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// Number of contours (outer contour with holes).
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size_t num_contours() const { return this->holes.size() + 1; }
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Polygon& contour_or_hole(size_t idx) { return (idx == 0) ? this->contour : this->holes[idx - 1]; }
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const Polygon& contour_or_hole(size_t idx) const { return (idx == 0) ? this->contour : this->holes[idx - 1]; }
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};
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inline bool operator==(const ExPolygon &lhs, const ExPolygon &rhs) { return lhs.contour == rhs.contour && lhs.holes == rhs.holes; }
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inline bool operator!=(const ExPolygon &lhs, const ExPolygon &rhs) { return lhs.contour != rhs.contour || lhs.holes != rhs.holes; }
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// Count a nuber of polygons stored inside the vector of expolygons.
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// Useful for allocating space for polygons when converting expolygons to polygons.
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inline size_t number_polygons(const ExPolygons &expolys)
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{
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size_t n_polygons = 0;
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for (const ExPolygon &ex : expolys)
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n_polygons += ex.holes.size() + 1;
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return n_polygons;
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}
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inline Lines to_lines(const ExPolygon &src)
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{
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size_t n_lines = src.contour.points.size();
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for (size_t i = 0; i < src.holes.size(); ++ i)
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n_lines += src.holes[i].points.size();
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Lines lines;
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lines.reserve(n_lines);
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for (size_t i = 0; i <= src.holes.size(); ++ i) {
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const Polygon &poly = (i == 0) ? src.contour : src.holes[i - 1];
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for (Points::const_iterator it = poly.points.begin(); it != poly.points.end()-1; ++it)
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lines.push_back(Line(*it, *(it + 1)));
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lines.push_back(Line(poly.points.back(), poly.points.front()));
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}
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return lines;
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}
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inline Lines to_lines(const ExPolygons &src)
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{
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size_t n_lines = 0;
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for (ExPolygons::const_iterator it_expoly = src.begin(); it_expoly != src.end(); ++ it_expoly) {
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n_lines += it_expoly->contour.points.size();
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for (size_t i = 0; i < it_expoly->holes.size(); ++ i)
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n_lines += it_expoly->holes[i].points.size();
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}
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Lines lines;
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lines.reserve(n_lines);
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for (ExPolygons::const_iterator it_expoly = src.begin(); it_expoly != src.end(); ++ it_expoly) {
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for (size_t i = 0; i <= it_expoly->holes.size(); ++ i) {
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const Points &points = ((i == 0) ? it_expoly->contour : it_expoly->holes[i - 1]).points;
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for (Points::const_iterator it = points.begin(); it != points.end()-1; ++it)
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lines.push_back(Line(*it, *(it + 1)));
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lines.push_back(Line(points.back(), points.front()));
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}
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}
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return lines;
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}
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inline Polylines to_polylines(const ExPolygon &src)
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{
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Polylines polylines;
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polylines.assign(src.holes.size() + 1, Polyline());
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size_t idx = 0;
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Polyline &pl = polylines[idx ++];
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pl.points = src.contour.points;
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pl.points.push_back(pl.points.front());
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for (Polygons::const_iterator ith = src.holes.begin(); ith != src.holes.end(); ++ith) {
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Polyline &pl = polylines[idx ++];
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pl.points = ith->points;
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pl.points.push_back(ith->points.front());
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}
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assert(idx == polylines.size());
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return polylines;
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}
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inline Polylines to_polylines(const ExPolygons &src)
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{
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Polylines polylines;
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polylines.assign(number_polygons(src), Polyline());
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size_t idx = 0;
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for (ExPolygons::const_iterator it = src.begin(); it != src.end(); ++it) {
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Polyline &pl = polylines[idx ++];
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pl.points = it->contour.points;
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pl.points.push_back(pl.points.front());
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for (Polygons::const_iterator ith = it->holes.begin(); ith != it->holes.end(); ++ith) {
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Polyline &pl = polylines[idx ++];
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pl.points = ith->points;
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pl.points.push_back(ith->points.front());
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}
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}
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assert(idx == polylines.size());
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return polylines;
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}
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inline Polylines to_polylines(ExPolygon &&src)
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{
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Polylines polylines;
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polylines.assign(src.holes.size() + 1, Polyline());
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size_t idx = 0;
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Polyline &pl = polylines[idx ++];
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pl.points = std::move(src.contour.points);
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pl.points.push_back(pl.points.front());
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for (Polygons::const_iterator ith = src.holes.begin(); ith != src.holes.end(); ++ith) {
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Polyline &pl = polylines[idx ++];
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pl.points = std::move(ith->points);
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pl.points.push_back(ith->points.front());
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}
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assert(idx == polylines.size());
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return polylines;
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}
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inline Polylines to_polylines(ExPolygons &&src)
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{
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Polylines polylines;
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polylines.assign(number_polygons(src), Polyline());
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size_t idx = 0;
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for (ExPolygons::const_iterator it = src.begin(); it != src.end(); ++it) {
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Polyline &pl = polylines[idx ++];
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pl.points = std::move(it->contour.points);
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pl.points.push_back(pl.points.front());
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for (Polygons::const_iterator ith = it->holes.begin(); ith != it->holes.end(); ++ith) {
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Polyline &pl = polylines[idx ++];
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pl.points = std::move(ith->points);
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pl.points.push_back(ith->points.front());
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}
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}
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assert(idx == polylines.size());
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return polylines;
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}
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inline Polygons to_polygons(const ExPolygon &src)
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{
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Polygons polygons;
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polygons.reserve(src.holes.size() + 1);
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polygons.push_back(src.contour);
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polygons.insert(polygons.end(), src.holes.begin(), src.holes.end());
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return polygons;
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}
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inline Polygons to_polygons(const ExPolygons &src)
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{
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Polygons polygons;
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polygons.reserve(number_polygons(src));
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for (ExPolygons::const_iterator it = src.begin(); it != src.end(); ++it) {
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polygons.push_back(it->contour);
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polygons.insert(polygons.end(), it->holes.begin(), it->holes.end());
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}
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return polygons;
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}
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inline ConstPolygonPtrs to_polygon_ptrs(const ExPolygon &src)
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{
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ConstPolygonPtrs polygons;
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polygons.reserve(src.holes.size() + 1);
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polygons.emplace_back(&src.contour);
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for (const Polygon &hole : src.holes)
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polygons.emplace_back(&hole);
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return polygons;
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}
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inline ConstPolygonPtrs to_polygon_ptrs(const ExPolygons &src)
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{
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ConstPolygonPtrs polygons;
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polygons.reserve(number_polygons(src));
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for (const ExPolygon &expoly : src) {
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polygons.emplace_back(&expoly.contour);
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for (const Polygon &hole : expoly.holes)
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polygons.emplace_back(&hole);
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}
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return polygons;
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}
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inline Polygons to_polygons(ExPolygon &&src)
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{
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Polygons polygons;
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polygons.reserve(src.holes.size() + 1);
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polygons.push_back(std::move(src.contour));
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std::move(std::begin(src.holes), std::end(src.holes), std::back_inserter(polygons));
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src.holes.clear();
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return polygons;
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}
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inline Polygons to_polygons(ExPolygons &&src)
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{
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Polygons polygons;
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polygons.reserve(number_polygons(src));
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for (ExPolygons::iterator it = src.begin(); it != src.end(); ++it) {
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polygons.push_back(std::move(it->contour));
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std::move(std::begin(it->holes), std::end(it->holes), std::back_inserter(polygons));
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it->holes.clear();
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}
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return polygons;
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}
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inline ExPolygons to_expolygons(const Polygons &polys)
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{
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ExPolygons ex_polys;
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ex_polys.assign(polys.size(), ExPolygon());
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for (size_t idx = 0; idx < polys.size(); ++idx)
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ex_polys[idx].contour = polys[idx];
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return ex_polys;
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}
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inline ExPolygons to_expolygons(Polygons &&polys)
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{
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ExPolygons ex_polys;
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ex_polys.assign(polys.size(), ExPolygon());
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for (size_t idx = 0; idx < polys.size(); ++idx)
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ex_polys[idx].contour = std::move(polys[idx]);
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return ex_polys;
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}
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inline void polygons_append(Polygons &dst, const ExPolygon &src)
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{
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dst.reserve(dst.size() + src.holes.size() + 1);
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dst.push_back(src.contour);
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dst.insert(dst.end(), src.holes.begin(), src.holes.end());
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}
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inline void polygons_append(Polygons &dst, const ExPolygons &src)
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{
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dst.reserve(dst.size() + number_polygons(src));
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for (ExPolygons::const_iterator it = src.begin(); it != src.end(); ++ it) {
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dst.push_back(it->contour);
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dst.insert(dst.end(), it->holes.begin(), it->holes.end());
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}
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}
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inline void polygons_append(Polygons &dst, ExPolygon &&src)
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{
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dst.reserve(dst.size() + src.holes.size() + 1);
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dst.push_back(std::move(src.contour));
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std::move(std::begin(src.holes), std::end(src.holes), std::back_inserter(dst));
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src.holes.clear();
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}
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inline void polygons_append(Polygons &dst, ExPolygons &&src)
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{
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dst.reserve(dst.size() + number_polygons(src));
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for (ExPolygons::iterator it = src.begin(); it != src.end(); ++ it) {
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dst.push_back(std::move(it->contour));
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std::move(std::begin(it->holes), std::end(it->holes), std::back_inserter(dst));
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it->holes.clear();
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}
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}
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inline void expolygons_append(ExPolygons &dst, const ExPolygons &src)
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{
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dst.insert(dst.end(), src.begin(), src.end());
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}
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inline void expolygons_append(ExPolygons &dst, ExPolygons &&src)
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{
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if (dst.empty()) {
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dst = std::move(src);
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} else {
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std::move(std::begin(src), std::end(src), std::back_inserter(dst));
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src.clear();
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}
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}
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inline void expolygons_rotate(ExPolygons &expolys, double angle)
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{
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for (ExPolygons::iterator p = expolys.begin(); p != expolys.end(); ++p)
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p->rotate(angle);
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}
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inline bool expolygons_contain(ExPolygons &expolys, const Point &pt)
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{
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for (ExPolygons::iterator p = expolys.begin(); p != expolys.end(); ++p)
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if (p->contains(pt))
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return true;
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return false;
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}
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inline ExPolygons expolygons_simplify(const ExPolygons &expolys, double tolerance)
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{
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ExPolygons out;
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out.reserve(expolys.size());
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for (const ExPolygon &exp : expolys)
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exp.simplify(tolerance, &out);
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return out;
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}
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extern BoundingBox get_extents(const ExPolygon &expolygon);
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extern BoundingBox get_extents(const ExPolygons &expolygons);
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extern BoundingBox get_extents_rotated(const ExPolygon &poly, double angle);
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extern BoundingBox get_extents_rotated(const ExPolygons &polygons, double angle);
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extern std::vector<BoundingBox> get_extents_vector(const ExPolygons &polygons);
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extern bool remove_sticks(ExPolygon &poly);
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extern void keep_largest_contour_only(ExPolygons &polygons);
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inline double area(const ExPolygon &poly) { return poly.area(); }
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inline double area(const ExPolygons &polys) { double s = 0.; for (auto &p : polys) s += p.area(); return s; }
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// Removes all expolygons smaller than min_area and also removes all holes smaller than min_area
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extern bool remove_small_and_small_holes(ExPolygons &expolygons, double min_area);
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} // namespace Slic3r
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// start Boost
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#include <boost/polygon/polygon.hpp>
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namespace boost { namespace polygon {
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template <>
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struct polygon_traits<Slic3r::ExPolygon> {
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typedef coord_t coordinate_type;
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typedef Slic3r::Points::const_iterator iterator_type;
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typedef Slic3r::Point point_type;
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// Get the begin iterator
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static inline iterator_type begin_points(const Slic3r::ExPolygon& t) {
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return t.contour.points.begin();
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}
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// Get the end iterator
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static inline iterator_type end_points(const Slic3r::ExPolygon& t) {
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return t.contour.points.end();
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}
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// Get the number of sides of the polygon
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static inline std::size_t size(const Slic3r::ExPolygon& t) {
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return t.contour.points.size();
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}
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// Get the winding direction of the polygon
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static inline winding_direction winding(const Slic3r::ExPolygon& /* t */) {
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return unknown_winding;
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}
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};
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template <>
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struct polygon_mutable_traits<Slic3r::ExPolygon> {
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//expects stl style iterators
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template <typename iT>
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static inline Slic3r::ExPolygon& set_points(Slic3r::ExPolygon& expolygon, iT input_begin, iT input_end) {
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expolygon.contour.points.assign(input_begin, input_end);
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// skip last point since Boost will set last point = first point
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expolygon.contour.points.pop_back();
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return expolygon;
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}
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};
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template <>
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struct geometry_concept<Slic3r::ExPolygon> { typedef polygon_with_holes_concept type; };
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template <>
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struct polygon_with_holes_traits<Slic3r::ExPolygon> {
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typedef Slic3r::Polygons::const_iterator iterator_holes_type;
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typedef Slic3r::Polygon hole_type;
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static inline iterator_holes_type begin_holes(const Slic3r::ExPolygon& t) {
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return t.holes.begin();
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}
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static inline iterator_holes_type end_holes(const Slic3r::ExPolygon& t) {
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return t.holes.end();
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}
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static inline unsigned int size_holes(const Slic3r::ExPolygon& t) {
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return (int)t.holes.size();
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}
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};
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template <>
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struct polygon_with_holes_mutable_traits<Slic3r::ExPolygon> {
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template <typename iT>
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static inline Slic3r::ExPolygon& set_holes(Slic3r::ExPolygon& t, iT inputBegin, iT inputEnd) {
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t.holes.assign(inputBegin, inputEnd);
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return t;
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}
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};
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//first we register CPolygonSet as a polygon set
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template <>
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struct geometry_concept<Slic3r::ExPolygons> { typedef polygon_set_concept type; };
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//next we map to the concept through traits
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template <>
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struct polygon_set_traits<Slic3r::ExPolygons> {
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typedef coord_t coordinate_type;
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typedef Slic3r::ExPolygons::const_iterator iterator_type;
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typedef Slic3r::ExPolygons operator_arg_type;
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static inline iterator_type begin(const Slic3r::ExPolygons& polygon_set) {
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return polygon_set.begin();
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}
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static inline iterator_type end(const Slic3r::ExPolygons& polygon_set) {
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return polygon_set.end();
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}
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//don't worry about these, just return false from them
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static inline bool clean(const Slic3r::ExPolygons& /* polygon_set */) { return false; }
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static inline bool sorted(const Slic3r::ExPolygons& /* polygon_set */) { return false; }
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};
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template <>
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struct polygon_set_mutable_traits<Slic3r::ExPolygons> {
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template <typename input_iterator_type>
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static inline void set(Slic3r::ExPolygons& expolygons, input_iterator_type input_begin, input_iterator_type input_end) {
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expolygons.assign(input_begin, input_end);
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}
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};
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} }
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// end Boost
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#endif
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