itkFEMElement3DC0LinearTetrahedron.h

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 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
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 *         http://www.apache.org/licenses/LICENSE-2.0.txt
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 *  See the License for the specific language governing permissions and
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#ifndef __itkFEMElement3DC0LinearTetrahedron_h
#define __itkFEMElement3DC0LinearTetrahedron_h

#include "itkFEMElementStd.h"
// to make some checks in GetLocalFromGlobalCoordinates
#include <vnl/vnl_matrix.h>
#include <vnl/algo/vnl_matrix_inverse.h>

namespace itk
{
namespace fem
{
class Element3DC0LinearTetrahedron : public ElementStd<4, 3>
{
public:

  typedef Element3DC0LinearTetrahedron Self;
  typedef ElementStd<4, 3>             TemplatedParentClass;
  typedef TemplatedParentClass         Superclass;
  typedef SmartPointer<Self>           Pointer;
  typedef SmartPointer<const Self>     ConstPointer;

  itkTypeMacro(Element3DC0LinearTetrahedron, TemplatedParentClass);

  // ////////////////////////////////////////////////////////////////////////
  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;

  // ////////////////////////////////////////////////////////////////////////
  virtual VectorType ShapeFunctions(const VectorType & pt) const;

  virtual void ShapeFunctionDerivatives(const VectorType & pt, MatrixType & shapeD) const;

  virtual bool GetLocalFromGlobalCoordinates(const VectorType & globalPt, VectorType & localPt) const;

protected:
  virtual void PrintSelf(std::ostream& os, Indent indent) const;

  virtual void PopulateEdgeIds(void);

};
}
}  // end namespace itk::fem

#endif  // #ifndef __itkFEMElement3DC0LinearTetrahedron_h