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89 lines
2.5 KiB
C++
89 lines
2.5 KiB
C++
// Created on: 1998-11-10
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// Created by: Igor FEOKTISTOV
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// Copyright (c) 1998-1999 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 _FEmTool_ElementsOfRefMatrix_HeaderFile
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#define _FEmTool_ElementsOfRefMatrix_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <Standard_Integer.hxx>
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#include <math_FunctionSet.hxx>
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#include <math_Vector.hxx>
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class PLib_Base;
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//! this class describes the functions needed for
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//! calculating matrix elements of RefMatrix for linear
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//! criteriums (Tension, Flexsion and Jerk) by Gauss integration.
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//! Each function from set gives value Pi(u)'*Pj(u)' or
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//! Pi(u)''*Pj(u)'' or Pi(u)'''*Pj(u)''' for each i and j,
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//! where Pi(u) is i-th basis function of expansion and
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//! (') means derivative.
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class FEmTool_ElementsOfRefMatrix : public math_FunctionSet
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{
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public:
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DEFINE_STANDARD_ALLOC
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Standard_EXPORT FEmTool_ElementsOfRefMatrix(const Handle(PLib_Base)& TheBase, const Standard_Integer DerOrder);
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//! returns the number of variables of the function.
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//! It is supposed that NbVariables = 1.
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Standard_EXPORT Standard_Integer NbVariables() const;
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//! returns the number of equations of the function.
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Standard_EXPORT Standard_Integer NbEquations() const;
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//! computes the values <F> of the functions for the
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//! variable <X>.
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//! returns True if the computation was done successfully,
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//! False otherwise.
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//! F contains results only for i<=j in following order:
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//! P0*P0, P0*P1, P0*P2... P1*P1, P1*P2,... (upper triangle of
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//! matrix {PiPj})
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Standard_EXPORT Standard_Boolean Value (const math_Vector& X, math_Vector& F);
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protected:
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private:
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Handle(PLib_Base) myBase;
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Standard_Integer myDerOrder;
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Standard_Integer myNbEquations;
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};
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#endif // _FEmTool_ElementsOfRefMatrix_HeaderFile
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