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occt/src/GeomLib/GeomLib_DenominatorMultiplier.cxx
abv d5f74e42d6 0024624: Lost word in license statement in source files 
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast
Wrong license statements corrected in several files.
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Copyright year updated in some files.
Obsolete documentation files removed from DrawResources.
2014-02-20 16:15:17 +04:00

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// Created on: 1997-05-13
// Created by: Stagiaire Francois DUMONT
// Copyright (c) 1997-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#include <GeomLib_DenominatorMultiplier.ixx>
#include <gp_Pnt.hxx>
#include <gp_Vec.hxx>
#include <TColgp_Array2OfPnt.hxx>
#include <TColStd_Array2OfReal.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <TColStd_Array1OfInteger.hxx>
#include <BSplSLib.hxx>
#include <math_Matrix.hxx>
//=======================================================================
//function :GeomLib_DenominatorMultiplier
//purpose :
//=======================================================================
GeomLib_DenominatorMultiplier::GeomLib_DenominatorMultiplier
(const Handle(Geom_BSplineSurface) & Surface,
const TColStd_Array1OfReal & KnotVector):mySurface(Surface),
myKnotFlatVector(1,KnotVector.Length())
{Standard_Integer i;
for (i=1;i<=KnotVector.Length();i++)
myKnotFlatVector.SetValue(i,KnotVector(i));
}
//=======================================================================
//function : value
//purpose : give the value of a(UParameter,VParameter)
//=======================================================================
Standard_Real GeomLib_DenominatorMultiplier::Value(const Standard_Real UParameter,
const Standard_Real VParameter)const
{Standard_Real Dumaxv,Duminv,dDduumaxv,dDduuminv,
Dv,Buv=0.0;
// gp_Pnt HermPnt;
gp_Pnt N;
gp_Vec Nu,Nv;
TColgp_Array2OfPnt surface_poles(1,mySurface->NbUPoles(),
1,mySurface->NbVPoles()) ;
TColStd_Array2OfReal surface_weights(1,mySurface->NbUPoles(),
1,mySurface->NbVPoles()) ;
TColStd_Array1OfReal surface_u_knots(1,mySurface->NbUKnots()) ;
TColStd_Array1OfInteger surface_u_mults(1,mySurface->NbUKnots()) ;
TColStd_Array1OfReal surface_v_knots(1,mySurface->NbVKnots()) ;
TColStd_Array1OfInteger surface_v_mults(1,mySurface->NbVKnots()) ;
Standard_Integer udegree,vdegree;
mySurface->UKnots(surface_u_knots) ;
mySurface->UMultiplicities(surface_u_mults) ;
mySurface->Poles(surface_poles) ;
mySurface->Weights(surface_weights) ;
mySurface->VKnots(surface_v_knots) ;
mySurface->VMultiplicities(surface_v_mults) ;
udegree=mySurface->UDegree();
vdegree=mySurface->VDegree();
BSplSLib::HomogeneousD1(mySurface->UKnot(mySurface->LastUKnotIndex()),VParameter,
0,0,
surface_poles,
surface_weights,
surface_u_knots,surface_v_knots,
surface_u_mults,surface_v_mults,
udegree,vdegree,
mySurface->IsURational(),mySurface->IsVRational(),
mySurface->IsUPeriodic(),mySurface->IsVPeriodic(),
N,Nu,Nv,
Dumaxv,
dDduumaxv,
Dv);
BSplSLib::HomogeneousD1(mySurface->UKnot(1),VParameter,
0,0,
surface_poles,
surface_weights,
surface_u_knots,surface_v_knots,
surface_u_mults,surface_v_mults,
udegree,vdegree,
mySurface->IsURational(),mySurface->IsVRational(),
mySurface->IsUPeriodic(),mySurface->IsVPeriodic(),
N,Nu,Nv,
Duminv,
dDduuminv,
Dv);
math_Matrix BSplineBasisDeriv(1,2,1,4,0.0);
Standard_Real B1prim0,Bprelastprim1,
lambda=(mySurface->Weight(1,1)/mySurface->Weight(mySurface->NbUPoles(),1));
Standard_Integer index,i;
BSplCLib::EvalBsplineBasis(1,
1,
4,
myKnotFlatVector,
0.0,
index,
BSplineBasisDeriv);
B1prim0=BSplineBasisDeriv(2,2);
BSplCLib::EvalBsplineBasis(1,
1,
4,
myKnotFlatVector,
1.0,
index,
BSplineBasisDeriv);
Bprelastprim1=BSplineBasisDeriv(2,3);
math_Matrix BSplineBasisValue(1,1,1,4,0.0);
BSplCLib::EvalBsplineBasis(1,
0,
4,
myKnotFlatVector,
UParameter,
index,
BSplineBasisValue);
TColStd_Array1OfReal value(0,5);
TColStd_Array1OfReal Polesenv(0,5); //poles of a(u,v)
for (i=0;i<=5;i++)
Polesenv(i)=0.0;
Polesenv(0)=Duminv;
Polesenv(1)=Duminv-dDduuminv/B1prim0;
Polesenv(4)=lambda*lambda*(Dumaxv-dDduumaxv/Bprelastprim1);
Polesenv(5)=lambda*lambda*Dumaxv;
if (myKnotFlatVector.Length()==8){
value(0)=BSplineBasisValue(1,1); //values of the basic functions
value(1)=BSplineBasisValue(1,2);
value(2)=0.0;
value(3)=0.0;
value(4)=BSplineBasisValue(1,3);
value(5)=BSplineBasisValue(1,4);
}
if (myKnotFlatVector.Length()==9){
if (index==1){
value(0)=BSplineBasisValue(1,1);
value(1)=BSplineBasisValue(1,2);
value(2)=BSplineBasisValue(1,3);
value(3)=0.0;
value(4)=BSplineBasisValue(1,4);
value(5)=0.0;
}
else{
value(0)=0.0;
value(1)=BSplineBasisValue(1,1);
value(2)=BSplineBasisValue(1,2);
value(3)=0.0;
value(4)=BSplineBasisValue(1,3);
value(5)=BSplineBasisValue(1,4);
}
Polesenv(2)=(0.5*(Polesenv(0)+Polesenv(5)));
}
if (myKnotFlatVector.Length()==10){
if (index==1){
value(0)=BSplineBasisValue(1,1);
value(1)=BSplineBasisValue(1,2);
value(2)=BSplineBasisValue(1,3);
value(3)=BSplineBasisValue(1,4);
value(4)=0.0;
value(5)=0.0;
}
if (index==2){
value(0)=0.0;
value(1)=BSplineBasisValue(1,1);
value(2)=BSplineBasisValue(1,2);
value(3)=BSplineBasisValue(1,3);
value(4)=BSplineBasisValue(1,4);
value(5)=0.0;
}
if (index==3){
value(0)=0.0;
value(1)=0.0;
value(2)=BSplineBasisValue(1,1);
value(3)=BSplineBasisValue(1,2);
value(4)=BSplineBasisValue(1,3);
value(5)=BSplineBasisValue(1,4);
}
Polesenv(2)=(0.5*(Polesenv(0)+Polesenv(5)));
Polesenv(3)=Polesenv(2);
}
for (i=0;i<=5;i++)
Buv+=Polesenv(i)*value(i);
return Buv;
}
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