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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
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 __itkFEMElement3DC0LinearTriangular_h
#define __itkFEMElement3DC0LinearTriangular_h
#include "itkFEMElementStd.h"
namespace itk
{
namespace fem
{
/**
* \class Element3DC0LinearTriangular
* \brief 3-noded, linear, C0 continuous finite element in 2D space.
*/
class Element3DC0LinearTriangular : public ElementStd<3, 3>
{
typedef ElementStd<3, 3> TemplatedParentClass;
FEM_ABSTRACT_CLASS(Element3DC0LinearTriangular, TemplatedParentClass)
public:
// ////////////////////////////////////////////////////////////////////////
/*
* Methods related to numeric integration
*/
enum
{
DefaultIntegrationOrder = 1
};
virtual void
GetIntegrationPointAndWeight(unsigned int i, VectorType & pt, Float & w, unsigned int order) 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;
// FIXME: Write a proper implementation
virtual bool
GetLocalFromGlobalCoordinates(const VectorType & globalPt, VectorType & localPt) const;
virtual Float
JacobianDeterminant(const VectorType & pt, const MatrixType * pJ = 0) const;
virtual void
JacobianInverse(const VectorType & pt, MatrixType & invJ, const MatrixType * pJ = 0) const;
/**
* Draw the element on the specified device context
*/
#ifdef FEM_BUILD_VISUALIZATION
void
Draw(CDC * pDC, Solution::ConstPointer sol) const;
#endif
/**
* Constants for integration rules.
*/
static const Float trigGaussRuleInfo[6][7][4];
/**
* Array that holds number of integration point for each order
* of numerical integration.
*/
static const unsigned int Nip[6];
};
} // namespace fem
} // namespace itk
#endif // #ifndef __itkFEMElement3DC0LinearTriangular_h
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