#ifndef __CPEXTENSIONS__ALGORITHMS__GRADIENTIMAGEFUNCTIONBASE__HXX__
#define __CPEXTENSIONS__ALGORITHMS__GRADIENTIMAGEFUNCTIONBASE__HXX__

// -------------------------------------------------------------------------
template< class _TGradient >
void cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
Prepare( ) const
{
}

// -------------------------------------------------------------------------
template< class _TGradient >
typename cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
TOutput cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
Evaluate( const TPoint& p ) const
{
  TIndex i;
  this->GetInputImage( )->TransformPhysicalPointToIndex( p, i );
  return( this->EvaluateAtIndex( i ) );
}

// -------------------------------------------------------------------------
template< class _TGradient >
typename cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
TOutput cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
EvaluateAtIndex( const TIndex& i ) const
{
  return( this->_Evaluate( i ) );
}

// -------------------------------------------------------------------------
template< class _TGradient >
typename cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
TOutput cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
EvaluateAtContinuousIndex( const TContIndex& i ) const
{
  TPoint p;
  this->GetInputImage( )->TransformContinuousIndexToPhysicalPoint( i, p );
  return( this->Evaluate( p ) );
}

// -------------------------------------------------------------------------
template< class _TGradient >
cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
GradientImageFunctionBase( )
  : Superclass( )
{
}

// -------------------------------------------------------------------------
template< class _TGradient >
cpExtensions::Algorithms::GradientImageFunctionBase< _TGradient >::
~GradientImageFunctionBase( )
{
}

#endif // __CPEXTENSIONS__ALGORITHMS__GRADIENTIMAGEFUNCTIONBASE__HXX__

// eof - $RCSfile$