1 // Copyright (C) 2019-2020 CEA/DEN, EDF R&D
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Lesser General Public
5 // License as published by the Free Software Foundation; either
6 // version 2.1 of the License, or (at your option) any later version.
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // Lesser General Public License for more details.
13 // You should have received a copy of the GNU Lesser General Public
14 // License along with this library; if not, write to the Free Software
15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
20 #include <GeomAPI_BSpline2d.h>
21 #include <GeomAPI_Pnt2d.h>
22 #include <GeomAPI_XY.h>
24 #include <Geom2d_BSplineCurve.hxx>
26 #define MY_BSPLINE (*(implPtr<Handle_Geom2d_BSplineCurve>()))
29 static Handle_Geom2d_BSplineCurve* newBSpline2d(
30 const std::list<std::shared_ptr<GeomAPI_Pnt2d> >& thePoles,
31 const std::list<double>& theWeights,
33 const bool thePeriodic)
35 int aNbKnots = (int)thePoles.size() - theDegree + 1;
37 return new Handle_Geom2d_BSplineCurve();
39 // collect arrays of poles, weights, knots and multiplicities
40 TColgp_Array1OfPnt2d aPoles(1, (int)thePoles.size());
41 TColStd_Array1OfReal aWeights(1, (int)theWeights.size());
42 TColStd_Array1OfReal aKnots(1, aNbKnots);
43 TColStd_Array1OfInteger aMults(1, aNbKnots);
46 for (std::list<GeomPnt2dPtr>::const_iterator aPIt = thePoles.begin();
47 aPIt != thePoles.end(); ++aPIt, ++anIndex)
48 aPoles.SetValue(anIndex, gp_Pnt2d((*aPIt)->x(), (*aPIt)->y()));
50 for (std::list<double>::const_iterator aWIt = theWeights.begin();
51 aWIt != theWeights.end(); ++aWIt, ++anIndex)
52 aWeights.SetValue(anIndex, *aWIt);
54 static const double aStartParam = 0.0;
55 static const double aEndParam = 1.0;
56 double aStep = aEndParam / (aNbKnots - 1);
57 for (double aKnot = aStartParam; anIndex < aNbKnots; ++anIndex, aKnot += aStep)
58 aKnots.SetValue(anIndex, aKnot);
59 aKnots.ChangeLast() = aEndParam;
61 aMults.SetValue(anIndex, theDegree + 1);
62 for (++anIndex; anIndex < aNbKnots; ++anIndex)
63 aMults.SetValue(anIndex, 1);
64 aMults.SetValue(aNbKnots, theDegree + 1);
66 Handle(Geom2d_BSplineCurve) aCurve =
67 new Geom2d_BSplineCurve(aPoles, aWeights, aKnots, aMults, theDegree, thePeriodic);
68 return new Handle_Geom2d_BSplineCurve(aCurve);
71 static Handle_Geom2d_BSplineCurve* newBSpline2d(
72 const std::list<std::shared_ptr<GeomAPI_Pnt2d> >& thePoles,
73 const std::list<double>& theWeights,
74 const bool thePeriodic)
77 if ((int)thePoles.size() <= aDegree)
78 aDegree = (int)thePoles.size() - 1;
80 return new Handle_Geom2d_BSplineCurve();
81 return newBSpline2d(thePoles, theWeights, aDegree, thePeriodic);
85 GeomAPI_BSpline2d::GeomAPI_BSpline2d(const std::list<std::shared_ptr<GeomAPI_Pnt2d> >& thePoles,
86 const std::list<double>& theWeights,
87 const bool thePeriodic)
88 : GeomAPI_Interface(newBSpline2d(thePoles, theWeights, thePeriodic))
91 throw Standard_ConstructionError("GeomAPI_BSpline2d: Impossible to create B-spline curve");
94 GeomAPI_BSpline2d::GeomAPI_BSpline2d(const std::list<std::shared_ptr<GeomAPI_Pnt2d> >& thePoles,
95 const std::list<double>& theWeights,
97 const bool thePeriodic)
98 : GeomAPI_Interface(newBSpline2d(thePoles, theWeights, theDegree, thePeriodic))
101 throw Standard_ConstructionError("GeomAPI_BSpline2d: Impossible to create B-spline curve");
104 bool GeomAPI_BSpline2d::isNull() const
106 return MY_BSPLINE.IsNull();
109 int GeomAPI_BSpline2d::degree() const
111 return MY_BSPLINE->Degree();
114 void GeomAPI_BSpline2d::D0(const double theU, std::shared_ptr<GeomAPI_Pnt2d>& thePoint)
117 MY_BSPLINE->D0(theU, aPnt);
118 thePoint.reset(new GeomAPI_Pnt2d(aPnt.X(), aPnt.Y()));
121 void GeomAPI_BSpline2d::D1(const double theU, std::shared_ptr<GeomAPI_Pnt2d>& thePoint,
122 std::shared_ptr<GeomAPI_XY>& theDerivative)
126 MY_BSPLINE->D1(theU, aPnt, aVec);
127 thePoint.reset(new GeomAPI_Pnt2d(aPnt.X(), aPnt.Y()));
128 theDerivative.reset(new GeomAPI_XY(aVec.X(), aVec.Y()));