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/************************************************************************/
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/* 类名：CVoronoi */
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/* 功能：由散点生成Voronoi图（龟背图） */
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/* 王昌伟 2011-12-1 */
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/************************************************************************/
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#pragma once
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#include "Triangulation.h"
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#include <list>
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//单个Voronoi图元
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class CVoronoiUnit
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{
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public:
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CVoronoiUnit();
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/** @brief判断该图元是否闭合 */
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bool IsClosed();
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/** @brief 添加边界，返回1表示添加成功 */
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bool AddBorder(CCurve& border);
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int npt; //中心点序号
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CPoint3D* ppt; //中心点指针
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list<CPoint3D> m_nodPoints;
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private:
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/** @brief 找到中心点最小包围曲线，将点存入ptlist*/
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bool MinClosedCurve(CCurve& nodCur, CCurve& border,CPointList& ptlist);
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};
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class AFX_EXT_CLASS CVoronoi:public CTriangulation
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{
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public:
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CVoronoi(void);
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virtual ~CVoronoi(void);
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public:
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/** @brief 生成Voronoi图 */
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int CreateVoronoiMap(CCurve* border = NULL);
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/** @brief 读取2D散点数据 */
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virtual int ReadPoints(vector<double>& X, vector<double>& Y);
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virtual int ReadPoints(int num, double* X, double* Y);
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/** @brief 清空类成员*/
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virtual void ClearAll();
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////////////////////////////////////////////////////////////////////////
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//图件生成之后的调用函数
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//
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/** @brief 获得生成的Voronoi图的区域线*/
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int GetUnitCurve(int nIndex, CCurve& pCurve);
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/** @brief 获得生成的Voronoi图的区域线个数*/
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int GetUnitCount() { return (int)m_VUnitList.size(); }
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/** @brief 将Voronoi图写入文件*/
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void Write(char* filename);
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private:
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/** @brief 求取两结点中点*/
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bool MidPoint(int npt1, int npt2,CPoint3D& mpt);
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/** @brief 求取两结点中点*/
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bool MidPoint(CPoint3D& pt1, CPoint3D& pt2,CPoint3D& mpt);
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/** @brief 由边界条件生成Voronoi图*/
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virtual int Create();
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/** @brief 由边界选择数据点，删除边界外的数据点*/
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void SelectPointsByBorder();
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/** @brief 生成单个龟背图元*/
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bool CreateVoronoiUnit(int npt, int nTri, CVoronoiUnit& vunit);
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/** @brief 单方向追踪nTri相邻三角形中的Voronoi结点,addMode == 0为尾部添加点，1 为头部添加 */
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virtual int OneWayTrace(int& nTri, int& npt1, int& npt2, set<int>& FDTriNos,list<CPoint3D>& nodlist, int addMode = 0);
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/** @brief 曲线延伸到边界，求交点桩号*/
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bool ExtendToBorder(list<CPoint3D>& nodlist, double& l0 , double extlen);
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/** @brief 生成包络曲线 */
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bool CreateEnvelopeCurve();
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/** @brief生成外心点数组*/
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bool CreateCirCenterPoints();
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private:
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/** @brief 三角形外心*/
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vector<CPoint3D*> m_CCPoints;
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/** @brief 所有龟背图元容器*/
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vector<CVoronoiUnit*> m_VUnitList;
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/** @brief Voronoi图边界线 */
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CCurve m_Border;
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/** @brief 网格包络线*/
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CCurve m_OutlineCurve;
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};
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