X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=src%2FGeomAPI%2FGeomAPI_Circ2d.cpp;h=4ac7458640a9e61f1ef6681aa0c3eb6689615353;hb=8476d5e088f7b1b5a414fa5e33ce99d6131929eb;hp=9871e60fb0387d510778839af5823d79d59a9234;hpb=38afbd899a8645c83e17f2c24a17a2b7414911b4;p=modules%2Fshaper.git

diff --git a/src/GeomAPI/GeomAPI_Circ2d.cpp b/src/GeomAPI/GeomAPI_Circ2d.cpp
index 9871e60fb..4ac745864 100644
--- a/src/GeomAPI/GeomAPI_Circ2d.cpp
+++ b/src/GeomAPI/GeomAPI_Circ2d.cpp
@@ -12,13 +12,14 @@
 #include <gp_Circ2d.hxx>
 #include <gp_Pnt2d.hxx>
 #include <gp_Ax2d.hxx>
+#include <GeomLib_Tool.hxx>
 #include <Geom2d_Circle.hxx>
 #include <Geom2dAPI_ProjectPointOnCurve.hxx>
 #include <Precision.hxx>
 
 #include <IntAna2d_AnaIntersection.hxx>
 
-#define MY_CIRC2D static_cast<gp_Circ2d*>(myImpl)
+#define MY_CIRC2D implPtr<gp_Circ2d>()
 
 static gp_Circ2d* newCirc2d(const double theCenterX, const double theCenterY, const gp_Dir2d theDir,
                             const double theRadius)
@@ -43,6 +44,49 @@ static gp_Circ2d* newCirc2d(const double theCenterX, const double theCenterY,
   return newCirc2d(theCenterX, theCenterY, aDir, aRadius);
 }
 
+static gp_Circ2d* newCirc2d(const std::shared_ptr<GeomAPI_Pnt2d>& theFirstPoint,
+                            const std::shared_ptr<GeomAPI_Pnt2d>& theSecondPoint,
+                            const std::shared_ptr<GeomAPI_Pnt2d>& theThirdPoint)
+{
+  gp_XY aFirstPnt(theFirstPoint->x(), theFirstPoint->y());
+  gp_XY aSecondPnt(theSecondPoint->x(), theSecondPoint->y());
+  gp_XY aThirdPnt(theThirdPoint->x(), theThirdPoint->y());
+
+  gp_XY aVec12 = aSecondPnt - aFirstPnt;
+  gp_XY aVec23 = aThirdPnt - aSecondPnt;
+  gp_XY aVec31 = aFirstPnt - aThirdPnt;
+
+  // coefficients to calculate center
+  double aCoeff1, aCoeff2, aCoeff3;
+
+  // square of parallelogram
+  double aSquare2 = aVec12.Crossed(aVec23);
+  aSquare2 *= aSquare2 * 2.0;
+  if (aSquare2 < 1.e-20) {
+    // if two points are equal, build a circle on two different points as on diameter
+    double aSqLen12 = aVec12.SquareModulus();
+    double aSqLen23 = aVec23.SquareModulus();
+    double aSqLen31 = aVec31.SquareModulus();
+    if (aSqLen12 < Precision::SquareConfusion() &&
+        aSqLen23 < Precision::SquareConfusion() &&
+        aSqLen31 < Precision::SquareConfusion())
+      return NULL;
+    aCoeff1 = aCoeff2 = aCoeff3 = 1.0 / 3.0;
+  }
+  else {
+    aCoeff1 = aVec23.Dot(aVec23) / aSquare2 * aVec12.Dot(aVec31.Reversed());
+    aCoeff2 = aVec31.Dot(aVec31) / aSquare2 * aVec23.Dot(aVec12.Reversed());
+    aCoeff3 = aVec12.Dot(aVec12) / aSquare2 * aVec31.Dot(aVec23.Reversed());
+  }
+  // center
+  gp_XY aCenter = aFirstPnt * aCoeff1 + aSecondPnt * aCoeff2 + aThirdPnt * aCoeff3;
+  // radius
+  double aRadius = (aFirstPnt - aCenter).Modulus();
+
+  gp_Dir2d aDir(aFirstPnt - aCenter);
+  return newCirc2d(aCenter.X(), aCenter.Y(), aDir, aRadius);
+}
+
 GeomAPI_Circ2d::GeomAPI_Circ2d(const std::shared_ptr<GeomAPI_Pnt2d>& theCenter,
                                const std::shared_ptr<GeomAPI_Pnt2d>& theCirclePoint)
     : GeomAPI_Interface(
@@ -55,7 +99,13 @@ GeomAPI_Circ2d::GeomAPI_Circ2d(const std::shared_ptr<GeomAPI_Pnt2d>& theCenter,
     : GeomAPI_Interface(
         newCirc2d(theCenter->x(), theCenter->y(), theDir->impl<gp_Dir2d>(), theRadius))
 {
+}
 
+GeomAPI_Circ2d::GeomAPI_Circ2d(const std::shared_ptr<GeomAPI_Pnt2d>& theFirstPoint,
+                               const std::shared_ptr<GeomAPI_Pnt2d>& theSecondPoint,
+                               const std::shared_ptr<GeomAPI_Pnt2d>& theThirdPoint)
+    : GeomAPI_Interface(newCirc2d(theFirstPoint, theSecondPoint, theThirdPoint))
+{
 }
 
 const std::shared_ptr<GeomAPI_Pnt2d> GeomAPI_Circ2d::project(
@@ -88,12 +138,34 @@ const std::shared_ptr<GeomAPI_Pnt2d> GeomAPI_Circ2d::project(
 
 const std::shared_ptr<GeomAPI_Pnt2d> GeomAPI_Circ2d::center() const
 {
+  if (!MY_CIRC2D)
+    return std::shared_ptr<GeomAPI_Pnt2d>();
   const gp_Pnt2d& aCenter = MY_CIRC2D->Location();
   return std::shared_ptr<GeomAPI_Pnt2d>(new GeomAPI_Pnt2d(aCenter.X(), aCenter.Y()));
 }
 
 double GeomAPI_Circ2d::radius() const
 {
+  if (!MY_CIRC2D)
+    return 0.0;
   return MY_CIRC2D->Radius();
 }
 
+//=================================================================================================
+const bool GeomAPI_Circ2d::parameter(const std::shared_ptr<GeomAPI_Pnt2d> thePoint,
+                                   const double theTolerance,
+                                   double& theParameter) const
+{
+  Handle(Geom2d_Circle) aCurve = new Geom2d_Circle(*MY_CIRC2D);
+  return GeomLib_Tool::Parameter(aCurve, thePoint->impl<gp_Pnt2d>(), theTolerance, theParameter) == Standard_True;
+}
+
+//=================================================================================================
+void GeomAPI_Circ2d::D0(const double theU, std::shared_ptr<GeomAPI_Pnt2d>& thePoint)
+{
+  Handle(Geom2d_Circle) aCurve = new Geom2d_Circle(*MY_CIRC2D);
+  gp_Pnt2d aPnt;
+  aCurve->D0(theU, aPnt);
+  thePoint.reset(new GeomAPI_Pnt2d(aPnt.X(), aPnt.Y()));
+}
+