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 class PLib_Base;
0028
0029
0030 //! this  class  describes  the  functions  needed  for
0031 //! calculating  matrix  elements  of  RefMatrix  for  linear
0032 //! criteriums  (Tension,  Flexsion  and  Jerk) by  Gauss  integration.
0033 //! Each  function  from  set  gives  value  Pi(u)'*Pj(u)'  or
0034 //! Pi(u)''*Pj(u)''  or  Pi(u)'''*Pj(u)'''  for  each  i  and  j,
0035 //! where  Pi(u)  is  i-th  basis  function  of  expansion  and
0036 //! (')  means  derivative.
0037 class FEmTool_ElementsOfRefMatrix  : public math_FunctionSet
0038 {
0039 public:
0040
0041   DEFINE_STANDARD_ALLOC
0042
0043
0044   Standard_EXPORT FEmTool_ElementsOfRefMatrix(const Handle(PLib_Base)& TheBase, const Standard_Integer DerOrder);
0045
0046   //! returns the number of variables of the function.
0047   //! It  is  supposed  that  NbVariables  =  1.
0048   Standard_EXPORT Standard_Integer NbVariables() const;
0049
0050   //! returns the number of equations of the function.
0051   Standard_EXPORT Standard_Integer NbEquations() const;
0052
0053   //! computes the values <F> of the functions for the
0054   //! variable <X>.
0055   //! returns True if the computation was done successfully,
0056   //! False otherwise.
0057   //! F  contains  results  only  for  i<=j  in  following  order:
0058   //! P0*P0,  P0*P1,  P0*P2...  P1*P1,  P1*P2,...  (upper  triangle of
0059   //! matrix  {PiPj})
0060   Standard_EXPORT Standard_Boolean Value (const math_Vector& X, math_Vector& F);
0061
0062
0063
0064
0065 protected:
0066
0067
0068
0069
0070
0071 private:
0072
0073
0074
0075   Handle(PLib_Base) myBase;
0076   Standard_Integer myDerOrder;
0077   Standard_Integer myNbEquations;
0078
0079
0080 };
0081
0082
0083
0084
0085
0086
0087
0088 #endif // _FEmTool_ElementsOfRefMatrix_HeaderFile