include/opencascade/FEmTool_ElementsOfRefMatrix.hxx

0001 // Created on: 1998-11-10
0002 // Created by: Igor FEOKTISTOV
0003 // Copyright (c) 1998-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _FEmTool_ElementsOfRefMatrix_HeaderFile
0018 #define _FEmTool_ElementsOfRefMatrix_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <Standard_Integer.hxx>
0025 #include <math_FunctionSet.hxx>
0026 #include <math_Vector.hxx>
0027 #include <PLib_HermitJacobi.hxx>
0028
0029 //! this class describes the functions needed for calculating
0030 //! matrix elements of RefMatrix for linear criteriums
0031 //! (Tension, Flexion and Jerk) by Gauss integration.
0032 //! Each function from set gives value Pi(u)'*Pj(u)' or
0033 //! Pi(u)''*Pj(u)'' or Pi(u)'''*Pj(u)''' for each i and j,
0034 //! where Pi(u) is i-th basis function of expansion and
0035 //! (') means derivative.
0036 class FEmTool_ElementsOfRefMatrix : public math_FunctionSet
0037 {
0038 public:
0039   DEFINE_STANDARD_ALLOC
0040
0041   Standard_EXPORT FEmTool_ElementsOfRefMatrix(const PLib_HermitJacobi& TheBase, const int DerOrder);
0042
0043   //! returns the number of variables of the function.
0044   //! It is supposed that NbVariables = 1.
0045   Standard_EXPORT int NbVariables() const override;
0046
0047   //! returns the number of equations of the function.
0048   Standard_EXPORT int NbEquations() const override;
0049
0050   //! computes the values <F> of the functions for the
0051   //! variable <X>.
0052   //! returns True if the computation was done successfully,
0053   //! False otherwise.
0054   //! F contains results only for i<=j in following order:
0055   //! P0*P0, P0*P1, P0*P2... P1*P1, P1*P2,... (upper triangle of
0056   //! matrix {PiPj})
0057   Standard_EXPORT bool Value(const math_Vector& X, math_Vector& F) override;
0058
0059 private:
0060   PLib_HermitJacobi myBase;
0061   int               myDerOrder;
0062   int               myNbEquations;
0063 };
0064
0065 #endif // _FEmTool_ElementsOfRefMatrix_HeaderFile