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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSpatialFunction.h,v $
Language: C++
Date: $Date: 2007-01-30 23:39:53 $
Version: $Revision: 1.18 $
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 __itkSpatialFunction_h
#define __itkSpatialFunction_h
#include "itkFunctionBase.h"
#include "itkPoint.h"
namespace itk
{
/** \class SpatialFunction
* \brief N-dimensional spatial function class
*
* itk::SpatialFunction provides the ability to define functions that can
* be evaluated at an arbitrary point in space (physical or otherwise). The return
* type is specified by the derived class, and the input to the function
* is an n-dimensional itk::Point.
*
* Although itk::ImageFunction and itk::SpatialFunction are quite similar,
* itk::SpatialFunction derived classes exist without reference to an Image
* type.
*
* SpatialFunction is templated over output type (the data type
* returned by an evaluate() call) and dimensionality.
*
* \ingroup SpatialFunctions
*/
template <typename TOutput,
unsigned int VImageDimension=3,
typename TInput=Point<double, VImageDimension> >
class ITK_EXPORT SpatialFunction : public FunctionBase<TInput, TOutput>
{
public:
/** Standard class typedefs. */
typedef SpatialFunction Self;
typedef FunctionBase< TInput, TOutput> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(SpatialFunction, FunctionBase);
/** Input type for the function. */
typedef typename Superclass::InputType InputType;
/** Output type for the function. */
typedef typename Superclass::OutputType OutputType;
/** Spatial dimension. */
itkStaticConstMacro(ImageDimension, unsigned int, VImageDimension);
/** Evaluate the function at a given position. Remember, position is
* represented by an n-d itk::Point object with data type double. */
virtual OutputType Evaluate( const InputType& input ) const = 0;
protected:
SpatialFunction();
virtual ~SpatialFunction();
void PrintSelf(std::ostream& os, Indent indent) const;
private:
SpatialFunction(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
// Define instantiation macro for this template.
#define ITK_TEMPLATE_SpatialFunction(_, EXPORT, x, y) namespace itk { \
_(3(class EXPORT SpatialFunction< ITK_TEMPLATE_3 x >)) \
namespace Templates { typedef SpatialFunction< ITK_TEMPLATE_3 x > \
SpatialFunction##y; } \
}
#if ITK_TEMPLATE_EXPLICIT
# include "Templates/itkSpatialFunction+-.h"
#endif
#if ITK_TEMPLATE_TXX
# include "itkSpatialFunction.txx"
#endif
#endif
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