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d5f74e42d6
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. Copyright and license statements added in XSD and GLSL files. Copyright year updated in some files. Obsolete documentation files removed from DrawResources.
100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
// Copyright (c) 1997-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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//#ifndef DEB
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#define No_Standard_RangeError
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#define No_Standard_OutOfRange
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#define No_Standard_DimensionError
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//#endif
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#include <math_GaussSetIntegration.ixx>
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#include <math.hxx>
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#include <math_Vector.hxx>
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#include <math_FunctionSet.hxx>
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math_GaussSetIntegration::math_GaussSetIntegration(math_FunctionSet& F,
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const math_Vector& Lower,
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const math_Vector& Upper,
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const math_IntegerVector& Order)
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: Val(1, F.NbEquations()) {
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Standard_Integer NbEqua = F.NbEquations() , NbVar = F.NbVariables();
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Standard_Integer i;
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Standard_Boolean IsOk;
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math_Vector FVal1(1, NbEqua), FVal2(1, NbEqua), Tval(1, NbVar);
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// Verification
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Standard_NotImplemented_Raise_if(
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NbVar != 1 || Order.Value(Order.Lower()) > math::GaussPointsMax(),
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"GaussSetIntegration ");
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// Initialisations
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Done = Standard_False;
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Standard_Real Xdeb = Lower.Value( Lower.Lower() );
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Standard_Real Xfin = Upper.Value( Upper.Lower() );
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Standard_Integer Ordre = Order.Value(Order.Lower());
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Standard_Real Xm, Xr;
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math_Vector GaussP(1, Ordre), GaussW(1, Ordre);
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// Recuperation des points de Gauss dans le fichier GaussPoints.
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math::GaussPoints (Ordre, GaussP);
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math::GaussWeights (Ordre, GaussW);
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// Changement de variable pour la mise a l'echelle [Lower, Upper] :
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Xm = 0.5 * (Xdeb + Xfin);
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Xr = 0.5 * (Xfin - Xdeb);
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Standard_Integer ind = Ordre/2, ind1 = (Ordre+1)/2;
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if(ind1 > ind) { // odder case
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Tval(1) = Xm; // + Xr * GaussP(ind1);
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IsOk = F.Value(Tval, Val);
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if (!IsOk) return;
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Val *= GaussW(ind1);
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}
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else {
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Val.Init(0);
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}
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for (i=1; i<= ind; i++) {
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Tval(1) = Xm + Xr * GaussP(i);
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IsOk = F.Value(Tval, FVal1);
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if (!IsOk) return;
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Tval(1) = Xm - Xr * GaussP(i);
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IsOk = F.Value(Tval, FVal2);
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if (!IsOk) return;
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FVal1 += FVal2;
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FVal1 *= GaussW(i);
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Val += FVal1;
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}
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Val *= Xr;
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Done = Standard_True;
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}
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void math_GaussSetIntegration::Dump(Standard_OStream& o) const
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{
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o <<"math_GaussSetIntegration ";
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if (Done) {
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o << " Status = Done \n";
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o << "Integration Value = " << Val<<"\n";
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}
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else {
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o << "Status = not Done \n";
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}
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}
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