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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSpatialFunctionImageEvaluatorFilter.txx,v $
Language: C++
Date: $Date: 2003-09-10 14:28:57 $
Version: $Revision: 1.15 $
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 __itkSpatialFunctionImageEvaluatorFilter_txx
#define __itkSpatialFunctionImageEvaluatorFilter_txx
#include "itkSize.h"
#include "itkImageRegion.h"
#include "itkSpatialFunctionImageEvaluatorFilter.h"
namespace itk
{
template< class TSpatialFunction, class TInputImage, class TOutputImage >
SpatialFunctionImageEvaluatorFilter< TSpatialFunction, TInputImage, TOutputImage >
::SpatialFunctionImageEvaluatorFilter()
{
itkDebugMacro(<< "SpatialFunctionImageEvaluatorFilter::SpatialFunctionImageEvaluatorFilter() called");
// Set the internal function to null
this->m_PixelFunction = 0;
}
template< class TSpatialFunction, class TInputImage, class TOutputImage >
void
SpatialFunctionImageEvaluatorFilter< TSpatialFunction, TInputImage, TOutputImage >
::GenerateData()
{
itkDebugMacro(<< "SpatialFunctionImageEvaluatorFilter::GenerateData() called");
// Allocate the output image
typename TOutputImage::Pointer outputPtr = this->GetOutput();
outputPtr->SetBufferedRegion(outputPtr->GetRequestedRegion());
outputPtr->Allocate();
// Create an iterator that will walk the output region
typedef ImageRegionIterator<TOutputImage> OutputIterator;
OutputIterator outIt = OutputIterator(outputPtr,
outputPtr->GetRequestedRegion());
// The value produced by the spatial function
// The type is the range of the spatial function
typename TSpatialFunction::OutputType value;
// The position at which the function is evaluated
// The type is the domain of the spatial function
typename TSpatialFunction::InputType evalPoint;
// Walk the output image, evaluating the spatial function at each pixel
for ( ; !outIt.IsAtEnd(); ++outIt)
{
typename TOutputImage::IndexType index = outIt.GetIndex();
outputPtr->TransformIndexToPhysicalPoint(index, evalPoint );
value = m_PixelFunction->Evaluate(evalPoint);
// Set the pixel value to the function value
outIt.Set( (PixelType) value);
}
itkDebugMacro(<< "SpatialFunctionImageEvaluatorFilter::GenerateData() finished");
}
} // end namespace
#endif
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