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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkWarpMeshFilter.txx,v $
Language: C++
Date: $Date: 2004-11-08 22:59:27 $
Version: $Revision: 1.1 $
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 _itkWarpMeshFilter_txx
#define _itkWarpMeshFilter_txx
#include "itkWarpMeshFilter.h"
#include "itkExceptionObject.h"
namespace itk
{
/**
*
*/
template <class TInputMesh, class TOutputMesh, class TDeformationField>
WarpMeshFilter<TInputMesh,TOutputMesh,TDeformationField>
::WarpMeshFilter()
{
// Setup the number of required inputs.
// This filter requires as input one Mesh and one Vector image.
this->SetNumberOfRequiredInputs( 2 );
}
template <class TInputMesh, class TOutputMesh, class TDeformationField>
const typename WarpMeshFilter<TInputMesh,TOutputMesh,TDeformationField>::DeformationFieldType *
WarpMeshFilter<TInputMesh,TOutputMesh,TDeformationField>
::GetDeformationField(void) const
{
return static_cast<const DeformationFieldType *>
( this->ProcessObject::GetInput( 1 ));
}
template <class TInputMesh, class TOutputMesh, class TDeformationField>
void
WarpMeshFilter<TInputMesh,TOutputMesh,TDeformationField>
::SetDeformationField( const DeformationFieldType * field )
{
// const cast is needed because the pipeline is not const-correct.
DeformationFieldType * input =
const_cast< DeformationFieldType * >( field );
this->ProcessObject::SetNthInput( 1, input );
}
/**
*
*/
template <class TInputMesh, class TOutputMesh, class TDeformationField>
void
WarpMeshFilter<TInputMesh,TOutputMesh,TDeformationField>
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
}
/**
* This method causes the filter to generate its output.
*/
template <class TInputMesh, class TOutputMesh, class TDeformationField>
void
WarpMeshFilter<TInputMesh,TOutputMesh,TDeformationField>
::GenerateData(void)
{
typedef typename TInputMesh::PointsContainer InputPointsContainer;
typedef typename TOutputMesh::PointsContainer OutputPointsContainer;
typedef typename TInputMesh::PointsContainerPointer InputPointsContainerPointer;
typedef typename TOutputMesh::PointsContainerPointer OutputPointsContainerPointer;
InputMeshPointer inputMesh = this->GetInput();
OutputMeshPointer outputMesh = this->GetOutput();
DeformationFieldPointer fieldPtr = this->GetDeformationField();
if( !inputMesh )
{
itkExceptionMacro(<<"Missing Input Mesh");
}
if( !outputMesh )
{
itkExceptionMacro(<<"Missing Output Mesh");
}
outputMesh->SetBufferedRegion( outputMesh->GetRequestedRegion() );
InputPointsContainerPointer inPoints = inputMesh->GetPoints();
OutputPointsContainerPointer outPoints = outputMesh->GetPoints();
outPoints->Reserve( inputMesh->GetNumberOfPoints() );
outPoints->Squeeze(); // in case the previous mesh had
// allocated a larger memory
typename InputPointsContainer::ConstIterator inputPoint = inPoints->Begin();
typename OutputPointsContainer::Iterator outputPoint = outPoints->Begin();
typedef typename InputMeshType::PointType InputPointType;
typedef typename OutputMeshType::PointType OutputPointType;
typedef typename DeformationFieldType::IndexType IndexType;
IndexType index;
OutputPointType displacedPoint;
DisplacementType displacement;
const unsigned int Dimension = fieldPtr->GetImageDimension();
while( inputPoint != inPoints->End() )
{
const InputPointType & originalPoint = inputPoint.Value();
fieldPtr->TransformPhysicalPointToIndex( originalPoint, index );
displacement = fieldPtr->GetPixel( index );
for(unsigned int i=0; i<Dimension; i++)
{
displacedPoint[i] = originalPoint[i] + displacement[i];
}
outputPoint.Value() = displacedPoint;
++inputPoint;
++outputPoint;
}
// Create duplicate references to the rest of data on the mesh
outputMesh->SetPointData( inputMesh->GetPointData() );
outputMesh->SetCellLinks( inputMesh->GetCellLinks() );
outputMesh->SetCells( inputMesh->GetCells() );
outputMesh->SetCellData( inputMesh->GetCellData() );
unsigned int maxDimension = TInputMesh::MaxTopologicalDimension;
for( unsigned int dim = 0; dim < maxDimension; dim++ )
{
outputMesh->SetBoundaryAssignments( dim,
inputMesh->GetBoundaryAssignments(dim) );
}
}
} // end namespace itk
#endif
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