89 lines
4.0 KiB
C++
89 lines
4.0 KiB
C++
// Copyright (C), 1998-2007, Beijing Tangent Engineering Software Co. Ltd.
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// = FileName: RoadArith.h
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// = Version: 8.5
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// = Author: lgh
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// = Date: 2010-9-7 14:44:54
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// = Description: 道路相关密切的一些处理算法
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// = Maintainers:
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#ifndef __TCH_SITIPLAN_ROADADAPTERFORLINK_H__
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#define __TCH_SITIPLAN_ROADADAPTERFORLINK_H__
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#include <geray2d.h>
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class CRoadArith
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{
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private:
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CRoadArith() {};
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~CRoadArith(){};
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public:
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// 处理道路的倒角
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// 按照正常情况考虑问题，排除异常情况
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// 返回值：是否正确的执行倒角
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// InterCircle：生成的倒角
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// 线段跟线段的倒角
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static bool InterCircleLineAndLine(AcGeCurve2d *pEnt1, bool bDir1, AcGeCurve2d *pEnt2, bool bDir2,
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double dRadius, AcGeCircArc2d &interCircle);
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// 线段跟弧线的倒角，参数同上
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static bool InterCircleLineAndArc(AcGeCurve2d *pEnt1, bool bDir1, AcGeCurve2d *pEnt2, bool bDir2,
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double dRadius, AcGeCircArc2d &interCircle);
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static bool InterCircleArcAndLine(AcGeCurve2d *pEnt1, bool bDir1, AcGeCurve2d *pEnt2, bool bDir2,
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double dRadius, AcGeCircArc2d &interCircle);
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// 弧线跟弧线的倒角，参数同上
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static bool InterCircleArcAndArc(AcGeCurve2d *pEnt1, bool bDir1, AcGeCurve2d *pEnt2, bool bDir2,
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double dRadius, AcGeCircArc2d &interCircle);
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// 倒角线在延长线附近存在两个交点， 应该从中选取一个合适的交点。
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static bool TestProperPoint(const AcGeLineSeg2d &line1, bool bStart1, const AcGeCircArc2d &arc2, bool bStart2,
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const AcGePoint2d &pt1, const AcGePoint2d &pt2, AcGePoint2d &ptDest);
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static bool TestProperPoint(const AcGeCircArc2d &arc1, bool bStart1, const AcGeCircArc2d &arc2, bool bStart2,
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const AcGePoint2d &pt1, const AcGePoint2d &pt2, AcGePoint2d &ptDest);
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private:
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// 交点是否在bDir的方向上。验证点在线上，或者在对应段的延伸线上。
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static bool PointInLineDir(const AcGeLineSeg2d &line, bool bDir, const AcGePoint2d &ptInter);
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static bool PointInArcDir(const AcGeCircArc2d &arc, bool bDir, const AcGePoint2d &ptInter);
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// 计算距离bStart端的距离。
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static void NearPtInLine(const AcGeLineSeg2d &line, bool bStart, const AcGePoint2d &pt1, const AcGePoint2d &pt2,
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double &dLen1, double &dLen2);
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static void NearPtInArc(const AcGeCircArc2d &arc, bool bStart, const AcGePoint2d &pt1, const AcGePoint2d &pt2,
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double &dLen1, double &dLen2);
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// 判断两线段（圆弧）是否可以执行倒角，如果可以倒角则计算交点
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static bool ForCenterLineAndLine(AcGeCurve2d *pEnt1, bool bDir1, AcGeCurve2d *pEnt2, bool bDir2, double dRadius, AcGePoint2d &ptCenter);
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static bool ForCenterLineAndArc(AcGeCurve2d *pEnt1, bool bDir1, AcGeCurve2d *pEnt2, bool bDir2, double dRadius, AcGePoint2d &ptCenter);
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static bool ForCenterArcAndLine(AcGeCurve2d *pEnt1, bool bDir1, AcGeCurve2d *pEnt2, bool bDir2, double dRadius, AcGePoint2d &ptCenter);
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static bool ForCenterArcAndArc(AcGeCurve2d *pEnt1, bool bDir1, AcGeCurve2d *pEnt2, bool bDir2, double dRadius, AcGePoint2d &ptCenter);
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// 构造线段所对应的弧线
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static AcGeRay2d LineSegToRay(const AcGeLineSeg2d &line, bool bDir);
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// 算法：以两个起点相连的线段为例，讲解该偏移算法。
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// line1 的两个向量：左向量vecL1，右向量vecR1
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// line2 的两个向量：左向量vecL2，右向量vecR2
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// line1,line2分别有两个方向向量：dri1, dir2;
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// line1、line2的左向量和右向量分别跟对方的方向向量比较。点积为正的即偏移方向。
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// 以统一的向量形式来描述两条相交边线的关系。判断他们应该的偏移方向
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static bool Off(const AcGeVector2d &vecL1, const AcGeVector2d &vecR1, const AcGeVector2d &vecL2, const AcGeVector2d &vecR2,
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const AcGeVector2d &dir1, const AcGeVector2d &dir2, bool &bLeft1, bool &bLeft2);
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// 计算两个倒角线的偏向，
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// ret：bLeft1, bLeft2;
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static bool FindUnitVec(const AcGeLineSeg2d &line1, bool bDir1, const AcGeLineSeg2d &line2, bool bDir2,
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bool &bLeft1, bool &bLeft2);
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static bool FindUnitVec(const AcGeLineSeg2d &line1, bool bDir1, const AcGeCircArc2d &arc2, bool bDir2,
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bool &bLeft1, bool &bIn2);
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static bool FindUnitVec(const AcGeCircArc2d &arc1, bool bDir1, const AcGeCircArc2d &arc2, bool bDir2,
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bool &bIn1, bool &bIn2);
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// 构造圆弧,
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static void ConInterCircle(const AcGePoint2d &ptCenter, const AcGePoint2d &pt1, const AcGePoint2d &pt2, AcGeCircArc2d &interArc);
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};
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#endif |