#pragma once
//#include "clipper2\clipper.engine.h"
//#include "clipper2\clipper.core.h"
#include "clipper2\clipper.h"
//#include "clipper2\clipper.rectclip.h"
//#include "clipper2\clipper.rectclip.h"
//#include "clipper2\RectClipLines.h"
using namespace std;
using namespace Clipper2Lib;

class AFX_EXT_CLASS Envelope {
public:
	Envelope();
	Envelope(int64_t x1, int64_t x2, int64_t y1, int64_t y2);
	Envelope(Point64& p1, Point64& p2);
	bool Intersects(Envelope& other);
	void Init(Point64& p1, Point64& p2);
	void Init(int64_t x1, int64_t x2, int64_t y1, int64_t y2);
public:
	/**
 *  the minimum x-coordinate
 */
	double MinX;
	/*
	 *  the maximum x-coordinate
	 */
	double MaxX;
	/*
	 * the minimum y-coordinate
	 */
	double MinY;
	/*
	 *  the maximum y-coordinate
	 */
	double MaxY;
};

struct LineSegment {

	Point64 ptStart;
	Point64 ptEnd;
	Envelope Range;

	LineSegment(Point64& start, Point64& end) {
		if (start.x < end.x)
		{
			ptStart = start;
			ptEnd = end;
		}
		else {
			ptStart = end;
			ptEnd = start;
		}
		Range.Init(ptStart, ptEnd);
	}
};

class AFX_EXT_CLASS CIntersectionUtil
{
public:
	CIntersectionUtil(void);
	~CIntersectionUtil(void);
	void SetSourceLines(const Paths64*  subjects);

	bool Intersects(LineSegment& clip);
	
private:
	const Paths64* m_pSourceLines;
	vector <LineSegment> m_Segments;
	/*vector <LineSegment> m_SegmentsR;*/
	void PrepareData();

	static bool SegmentSort(LineSegment& seg1, LineSegment& seg2);
	static bool SegmentSortR(LineSegment& seg1, LineSegment& seg2);
};