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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkFEMElement2DC1Beam.h,v $
Language: C++
Date: $Date: 2009-01-28 21:57:30 $
Version: $Revision: 1.9 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkFEMElement2DC1Beam_h
#define __itkFEMElement2DC1Beam_h
#include "itkFEMElementStd.h"
#include "itkFEMLoadElementBase.h"
#include "itkFEMMaterialLinearElasticity.h"
namespace itk {
namespace fem {
/**
* \class Element2DC1Beam
* \brief 1D Beam (spring that also bends) finite element in 2D space.
*/
class Element2DC1Beam : public ElementStd<2,2>
{
typedef ElementStd<2,2> TemplatedParentClass;
FEM_CLASS(Element2DC1Beam,TemplatedParentClass)
public:
// FIXME: Write this class in the same way as the others -
// properly define all virtual functions.
/**
* Default constructor only clears the internal storage
*/
Element2DC1Beam();
/**
* Construct an element by specifying two nodes and material
*/
Element2DC1Beam( Node::ConstPointer n1_,
Node::ConstPointer n2_,
Material::ConstPointer mat_);
/**
* Read data of this class from input stream
*/
void Read( std::istream&, void* info );
/**
* Write this class to output stream
*/
void Write( std::ostream& f ) const;
//////////////////////////////////////////////////////////////////////////
/*
* Methods related to the physics of the problem.
*/
virtual void GetStiffnessMatrix( MatrixType& Ke ) const;
virtual void GetMassMatrix( MatrixType& Me ) const;
HANDLE_ELEMENT_LOADS();
virtual void GetStrainDisplacementMatrix( MatrixType&, const MatrixType& ) const {}
virtual void GetMaterialMatrix( MatrixType& ) const {}
//////////////////////////////////////////////////////////////////////////
/**
* Methods related to numeric integration
*/
enum { DefaultIntegrationOrder = 1 };
virtual void GetIntegrationPointAndWeight( unsigned int i, VectorType& pt, Float& w, unsigned int order=0 ) const;
virtual unsigned int GetNumberOfIntegrationPoints( unsigned int order ) const;
//////////////////////////////////////////////////////////////////////////
/**
* Methods related to the geometry of an element
*/
virtual VectorType ShapeFunctions( const VectorType& pt ) const;
virtual void ShapeFunctionDerivatives( const VectorType& pt, MatrixType& shapeD ) const;
virtual bool GetLocalFromGlobalCoordinates( const VectorType&, VectorType& ) const
{
return false;
}
virtual Float JacobianDeterminant( const VectorType& pt, const MatrixType* pJ ) const;
virtual unsigned int GetNumberOfDegreesOfFreedomPerNode( void ) const
{ return 3; }
/**
* Draws the element on the specified device context
*/
#ifdef FEM_BUILD_VISUALIZATION
void Draw(CDC* pDC, Solution::ConstPointer sol) const;
#endif
public:
/**
* Pointer to geometric and material properties of the element
*/
MaterialLinearElasticity::ConstPointer m_mat;
virtual Material::ConstPointer GetMaterial(void) const { return m_mat; }
virtual void SetMaterial(Material::ConstPointer mat_ ) { m_mat=dynamic_cast<const MaterialLinearElasticity*>(&*mat_); }
};
FEM_CLASS_INIT(Element2DC1Beam)
}} // end namespace itk::fem
#endif // #ifndef __itkFEMElement2DC1Beam_h
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