1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D
3 // File: GeomAPI_Circ2d.cpp
4 // Created: 29 May 2014
5 // Author: Artem ZHIDKOV
7 #include <GeomAPI_Circ2d.h>
8 #include <GeomAPI_Pnt2d.h>
9 #include <GeomAPI_Dir2d.h>
11 #include <gp_Dir2d.hxx>
12 #include <gp_Circ2d.hxx>
13 #include <gp_Pnt2d.hxx>
14 #include <gp_Ax2d.hxx>
15 #include <GeomLib_Tool.hxx>
16 #include <Geom2d_Circle.hxx>
17 #include <Geom2dAPI_ProjectPointOnCurve.hxx>
18 #include <Precision.hxx>
20 #include <IntAna2d_AnaIntersection.hxx>
22 #define MY_CIRC2D implPtr<gp_Circ2d>()
24 static gp_Circ2d* newCirc2d(const double theCenterX, const double theCenterY, const gp_Dir2d theDir,
25 const double theRadius)
27 gp_Pnt2d aCenter(theCenterX, theCenterY);
28 return new gp_Circ2d(gp_Ax2d(aCenter, theDir), theRadius);
31 static gp_Circ2d* newCirc2d(const double theCenterX, const double theCenterY,
32 const double thePointX, const double thePointY)
34 gp_Pnt2d aCenter(theCenterX, theCenterY);
35 gp_Pnt2d aPoint(thePointX, thePointY);
37 double aRadius = aCenter.Distance(aPoint);
39 if (aCenter.IsEqual(aPoint, Precision::Confusion()))
42 gp_Dir2d aDir(theCenterX - thePointX, theCenterY - thePointY);
44 return newCirc2d(theCenterX, theCenterY, aDir, aRadius);
47 static gp_Circ2d* newCirc2d(const std::shared_ptr<GeomAPI_Pnt2d>& theFirstPoint,
48 const std::shared_ptr<GeomAPI_Pnt2d>& theSecondPoint,
49 const std::shared_ptr<GeomAPI_Pnt2d>& theThirdPoint)
51 gp_XY aFirstPnt(theFirstPoint->x(), theFirstPoint->y());
52 gp_XY aSecondPnt(theSecondPoint->x(), theSecondPoint->y());
53 gp_XY aThirdPnt(theThirdPoint->x(), theThirdPoint->y());
55 gp_XY aVec12 = aSecondPnt - aFirstPnt;
56 gp_XY aVec23 = aThirdPnt - aSecondPnt;
57 gp_XY aVec31 = aFirstPnt - aThirdPnt;
59 // coefficients to calculate center
60 double aCoeff1, aCoeff2, aCoeff3;
62 // square of parallelogram
63 double aSquare2 = aVec12.Crossed(aVec23);
64 aSquare2 *= aSquare2 * 2.0;
65 if (aSquare2 < 1.e-20) {
66 // if two points are equal, build a circle on two different points as on diameter
67 double aSqLen12 = aVec12.SquareModulus();
68 double aSqLen23 = aVec23.SquareModulus();
69 double aSqLen31 = aVec31.SquareModulus();
70 if (aSqLen12 < Precision::SquareConfusion() &&
71 aSqLen23 < Precision::SquareConfusion() &&
72 aSqLen31 < Precision::SquareConfusion())
74 aCoeff1 = aCoeff2 = aCoeff3 = 1.0 / 3.0;
77 aCoeff1 = aVec23.Dot(aVec23) / aSquare2 * aVec12.Dot(aVec31.Reversed());
78 aCoeff2 = aVec31.Dot(aVec31) / aSquare2 * aVec23.Dot(aVec12.Reversed());
79 aCoeff3 = aVec12.Dot(aVec12) / aSquare2 * aVec31.Dot(aVec23.Reversed());
82 gp_XY aCenter = aFirstPnt * aCoeff1 + aSecondPnt * aCoeff2 + aThirdPnt * aCoeff3;
84 double aRadius = (aFirstPnt - aCenter).Modulus();
86 gp_Dir2d aDir(aFirstPnt - aCenter);
87 return newCirc2d(aCenter.X(), aCenter.Y(), aDir, aRadius);
90 GeomAPI_Circ2d::GeomAPI_Circ2d(const std::shared_ptr<GeomAPI_Pnt2d>& theCenter,
91 const std::shared_ptr<GeomAPI_Pnt2d>& theCirclePoint)
93 newCirc2d(theCenter->x(), theCenter->y(), theCirclePoint->x(), theCirclePoint->y()))
97 GeomAPI_Circ2d::GeomAPI_Circ2d(const std::shared_ptr<GeomAPI_Pnt2d>& theCenter,
98 const std::shared_ptr<GeomAPI_Dir2d>& theDir, double theRadius)
100 newCirc2d(theCenter->x(), theCenter->y(), theDir->impl<gp_Dir2d>(), theRadius))
104 GeomAPI_Circ2d::GeomAPI_Circ2d(const std::shared_ptr<GeomAPI_Pnt2d>& theFirstPoint,
105 const std::shared_ptr<GeomAPI_Pnt2d>& theSecondPoint,
106 const std::shared_ptr<GeomAPI_Pnt2d>& theThirdPoint)
107 : GeomAPI_Interface(newCirc2d(theFirstPoint, theSecondPoint, theThirdPoint))
111 const std::shared_ptr<GeomAPI_Pnt2d> GeomAPI_Circ2d::project(
112 const std::shared_ptr<GeomAPI_Pnt2d>& thePoint) const
114 std::shared_ptr<GeomAPI_Pnt2d> aResult;
118 const gp_Pnt2d& aCenter = MY_CIRC2D->Location();
119 const gp_Pnt2d& aPoint = thePoint->impl<gp_Pnt2d>();
121 double aDist = aCenter.Distance(aPoint);
122 if (aDist < Precision::Confusion())
125 if (Abs(aDist - MY_CIRC2D->Radius()) < Precision::Confusion()) {
126 // Point on the circle
127 aResult = std::shared_ptr<GeomAPI_Pnt2d>(
128 new GeomAPI_Pnt2d(thePoint->x(), thePoint->y()));
130 gp_Dir2d aDir(aPoint.XY() - aCenter.XY());
131 gp_XY aNewPoint = aCenter.XY() + aDir.XY() * MY_CIRC2D->Radius();
132 aResult = std::shared_ptr<GeomAPI_Pnt2d>(
133 new GeomAPI_Pnt2d(aNewPoint.X(), aNewPoint.Y()));
139 const std::shared_ptr<GeomAPI_Pnt2d> GeomAPI_Circ2d::center() const
142 return std::shared_ptr<GeomAPI_Pnt2d>();
143 const gp_Pnt2d& aCenter = MY_CIRC2D->Location();
144 return std::shared_ptr<GeomAPI_Pnt2d>(new GeomAPI_Pnt2d(aCenter.X(), aCenter.Y()));
147 double GeomAPI_Circ2d::radius() const
151 return MY_CIRC2D->Radius();
154 //=================================================================================================
155 const bool GeomAPI_Circ2d::parameter(const std::shared_ptr<GeomAPI_Pnt2d> thePoint,
156 const double theTolerance,
157 double& theParameter) const
159 Handle(Geom2d_Circle) aCurve = new Geom2d_Circle(*MY_CIRC2D);
160 return GeomLib_Tool::Parameter(aCurve, thePoint->impl<gp_Pnt2d>(), theTolerance, theParameter) == Standard_True;
163 //=================================================================================================
164 void GeomAPI_Circ2d::D0(const double theU, std::shared_ptr<GeomAPI_Pnt2d>& thePoint)
166 Handle(Geom2d_Circle) aCurve = new Geom2d_Circle(*MY_CIRC2D);
168 aCurve->D0(theU, aPnt);
169 thePoint.reset(new GeomAPI_Pnt2d(aPnt.X(), aPnt.Y()));