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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkShapeSignedDistanceFunction.h,v $
Language: C++
Date: $Date: 2006-02-06 22:01:58 $
Version: $Revision: 1.6 $
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 __itkShapeSignedDistanceFunction_h
#define __itkShapeSignedDistanceFunction_h
#include "itkSpatialFunction.h"
#include "itkArray.h"
namespace itk
{
/** \class ShapeSignedDistanceFunction
* \brief Base class for functions which evaluates the signed distance
* from a shape.
*
* ShapeSignedDistanceFunction is the base class for functions which
* returns the signed distance from a shape at an arbitrary point.
* A shape assumed to be defined by a set of shape and pose parameters.
*
* Note that Initialize() must be called before use.
* This allows the class an opportunity to validate any inputs.
*
* This class is templated over the coordinate representation type
* (e.g. float or double) and the space dimension.
*
* ShapeSignedDistanceFunction is used to encapsulate the shape prior
* in ShapePriorSegmentationLevelSetFunctions.
*
* \sa SpatialFunction
* \sa ShapePriorSegmentationLevelSetFunction
*
* \ingroup ImageFunctions
*
* */
template <typename TCoordRep, unsigned int VSpaceDimension>
class ITK_EXPORT ShapeSignedDistanceFunction :
public SpatialFunction< double, VSpaceDimension, Point<TCoordRep,VSpaceDimension> >
{
public:
/** Standard class typedefs. */
typedef ShapeSignedDistanceFunction Self;
typedef SpatialFunction< double, VSpaceDimension,
Point<TCoordRep,VSpaceDimension> > Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(ShapeSignedDistanceFunction, SpatialFunction);
/** OutputType typedef support. */
typedef typename Superclass::OutputType OutputType;
/** InputType typedef support. */
typedef typename Superclass::InputType InputType;
/** Dimension underlying input image. */
itkStaticConstMacro(SpaceDimension, unsigned int, VSpaceDimension);
/** CoordRep typedef support. */
typedef TCoordRep CoordRepType;
/** Point typedef support. */
typedef InputType PointType;
/** Type of the shape parameters. */
typedef Array<double> ParametersType;
/** A shape is defined by a set of shape parameters. */
virtual void SetParameters( const ParametersType & ) = 0;
virtual ParametersType& GetParameters(void)
{ return m_Parameters; }
virtual unsigned int GetNumberOfShapeParameters(void) const = 0;
virtual unsigned int GetNumberOfPoseParameters(void) const = 0;
virtual unsigned int GetNumberOfParameters(void) const
{ return this->GetNumberOfShapeParameters() + this->GetNumberOfPoseParameters(); }
/** Evaluate the signed distance from a shape at a given position. */
virtual OutputType Evaluate( const PointType& point ) const = 0;
/** Initialize must be called before the first call of SetParameters() or
Evaluate() to allow the class to validate any inputs. */
virtual void Initialize() throw ( ExceptionObject ) {};
protected:
ShapeSignedDistanceFunction() {};
~ShapeSignedDistanceFunction(){};
void PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf( os, indent );
//FIX os << indent << "Parameters: " << m_Parameters << std::endl;
}
ParametersType m_Parameters;
private:
ShapeSignedDistanceFunction( const Self& ); //purposely not implemented
void operator=( const Self& ); //purposely not implemented
};
} // end namespace itk
#endif
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