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37 lines
1.4 KiB
C++
37 lines
1.4 KiB
C++
#ifndef slic3r_Geometry_ConvexHull_hpp_
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#define slic3r_Geometry_ConvexHull_hpp_
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#include <vector>
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#include "../ExPolygon.hpp"
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namespace Slic3r {
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using ExPolygons = std::vector<ExPolygon>;
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namespace Geometry {
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Pointf3s convex_hull(Pointf3s points);
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Polygon convex_hull(Points points);
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Polygon convex_hull(const Polygons &polygons);
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Polygon convex_hull(const ExPolygons &expolygons);
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Polygon convex_hull(const Polylines &polylines);
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inline Polygon convex_hull(const Polygon &poly) { return convex_hull(poly.points); }
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inline Polygon convex_hull(const ExPolygon &poly) { return convex_hull(poly.contour.points); }
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// Returns true if the intersection of the two convex polygons A and B
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// is not an empty set.
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bool convex_polygons_intersect(const Polygon &A, const Polygon &B);
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// Decompose source convex hull points into top / bottom chains with monotonically increasing x,
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// creating an implicit trapezoidal decomposition of the source convex polygon.
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// The source convex polygon has to be CCW oriented. O(n) time complexity.
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std::pair<std::vector<Vec2d>, std::vector<Vec2d>> decompose_convex_polygon_top_bottom(const std::vector<Vec2d> &src);
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// Convex polygon check using a top / bottom chain decomposition with O(log n) time complexity.
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bool inside_convex_polygon(const std::pair<std::vector<Vec2d>, std::vector<Vec2d>> &top_bottom_decomposition, const Vec2d &pt);
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} } // namespace Slicer::Geometry
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#endif
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