81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
/*******************************************************************************
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* Author : Angus Johnson *
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* Date : 1 November 2023 *
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* Website : http://www.angusj.com *
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* Copyright : Angus Johnson 2010-2023 *
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* Purpose : FAST rectangular clipping *
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* License : http://www.boost.org/LICENSE_1_0.txt *
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*******************************************************************************/
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#ifndef CLIPPER_RECTCLIP_H
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#define CLIPPER_RECTCLIP_H
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#include <cstdlib>
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#include <vector>
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#include <queue>
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#include "clipper2/clipper.core.h"
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namespace Clipper2Lib
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{
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enum class Location { Left, Top, Right, Bottom, Inside };
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class OutPt2;
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typedef std::vector<OutPt2*> OutPt2List;
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class OutPt2 {
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public:
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Point64 pt;
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size_t owner_idx;
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OutPt2List* edge;
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OutPt2* next;
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OutPt2* prev;
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};
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//------------------------------------------------------------------------------
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// RectClip64
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//------------------------------------------------------------------------------
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class RectClip64 {
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private:
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void ExecuteInternal(const Path64& path);
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Path64 GetPath(OutPt2*& op);
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protected:
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const Rect64 rect_;
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const Path64 rect_as_path_;
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const Point64 rect_mp_;
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Rect64 path_bounds_;
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std::deque<OutPt2> op_container_;
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OutPt2List results_; // each path can be broken into multiples
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OutPt2List edges_[8]; // clockwise and counter-clockwise
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std::vector<Location> start_locs_;
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void CheckEdges();
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void TidyEdges(int idx, OutPt2List& cw, OutPt2List& ccw);
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void GetNextLocation(const Path64& path,
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Location& loc, int& i, int highI);
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OutPt2* Add(Point64 pt, bool start_new = false);
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void AddCorner(Location prev, Location curr);
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void AddCorner(Location& loc, bool isClockwise);
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public:
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explicit RectClip64(const Rect64& rect) :
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rect_(rect),
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rect_as_path_(rect.AsPath()),
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rect_mp_(rect.MidPoint()) {}
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Paths64 Execute(const Paths64& paths);
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};
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//------------------------------------------------------------------------------
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// RectClipLines64
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//------------------------------------------------------------------------------
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class RectClipLines64 : public RectClip64 {
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private:
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void ExecuteInternal(const Path64& path);
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Path64 GetPath(OutPt2*& op);
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public:
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explicit RectClipLines64(const Rect64& rect) : RectClip64(rect) {};
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Paths64 Execute(const Paths64& paths);
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};
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} // Clipper2Lib namespace
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#endif // CLIPPER_RECTCLIP_H
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