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/************************************************************************
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* Author : wcw
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* Version : 1.0
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* Date : 23 April 2015
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* Description: 管理clipper.h中的类，提供外部运算接口
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/************************************************************************/
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#pragma once
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//#include "clipper.h"
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class Polygons;
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#include <vector>
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namespace NClipperLib
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{
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//布尔运算模式
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enum EClipType
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{
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ectIntersection,
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ectUnion,
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ectDifference,
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ectXor
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};
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////多边形类型
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//enum EPolyType { eptSubject, eptClip };
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struct ClipperPoint
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{
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double x;
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double y;
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ClipperPoint(){ }
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ClipperPoint(double x0,double y0){ x = x0; y = y0;}
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};
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typedef std::vector<ClipperPoint> ClipperPolygon;
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typedef std::vector<ClipperPolygon> ClipperPolygons;
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class AFX_EXT_CLASS CClipperHandler
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{
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public:
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CClipperHandler(void);
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CClipperHandler(unsigned int n_Prec);
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~CClipperHandler(void);
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/** @brief 多边形进行布尔运算，结果输入到solution中,eType为运算模式，相交，合并，相减，异或(exclusive or)*/
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bool Execute(ClipperPolygons& pPolySubject, ClipperPolygons& pPolyClip, ClipperPolygons& pPolySolution, EClipType eType);
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/** @brief 设置精度，即精确到小数点后多少位 */
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void SetPrecison(unsigned int nPrec);
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/** @brief 获取当前精度*/
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int GetPrecison(void) {return m_nPrec; }
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/** @获取多边形集最小坐标，失败返回false*/
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bool GetMinimumValue(ClipperPolygons& sourcePolygons, double& xmin, double& ymin );
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/** @获取多边形集最大坐标，失败返回false*/
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bool GetMaximumValue(ClipperPolygons& sourcePolygons, double& xmax, double& ymax );
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private:
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/** @brief 将ClipperPolygongs多边形集拷贝到目标多边形中,考虑偏移参数和精度 */
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bool ClipPolysToPolygons(ClipperPolygons* pSourcePolygons, Polygons* pDestPolygons);
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bool PolygonToClipPolys(Polygons* pSourcePolygons, ClipperPolygons* pDestPolygons);
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/** @brief 内部执行*/
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//bool Execute()
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/** @breif 由输入的多边形数据获取内部运算参数 */
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bool GetOperationParas();
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ClipperPolygons* m_pSubject;
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ClipperPolygons* m_pClip;
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unsigned int m_nPrec; //精度，表示精确到小数点后的位数 缺省为8
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double m_dXOffset;//x方向偏移量
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double m_dYOffset;//y方向偏移量
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//int m_nXInitOffset; //X初始偏移量
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//long64 m_nXScaleOffset; //X放大后偏移量
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//int m_nYInitOffset; //Y初始偏移量
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//long64 m_nYScaleOffset; //Y放大后偏移量
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//double m_dScale ; // 放大比例
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//double m_dXOffset; // X偏移量
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//double m_dYOffset; // y偏移量
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};
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} //namespace
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