itkRegularizedHeavisideStepFunction.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
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 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
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 *=========================================================================*/
#ifndef __itkRegularizedHeavisideStepFunction_h
#define __itkRegularizedHeavisideStepFunction_h

#include "itkHeavisideStepFunctionBase.h"

namespace itk
{
template< typename TInput = float, typename TOutput = double >
class RegularizedHeavisideStepFunction:
    public HeavisideStepFunctionBase< TInput, TOutput >
{
public:
  typedef RegularizedHeavisideStepFunction             Self;
  typedef HeavisideStepFunctionBase< TInput, TOutput > Superclass;
  typedef SmartPointer< Self >                         Pointer;
  typedef SmartPointer< const Self >                   ConstPointer;

  typedef typename Superclass::InputType  InputType;
  typedef typename Superclass::OutputType OutputType;

  typedef typename NumericTraits< InputType >::RealType RealType;

  void SetEpsilon(const RealType & ieps);

  itkGetConstMacro( Epsilon, RealType );
  itkGetConstMacro( OneOverEpsilon, RealType );

protected:
  RegularizedHeavisideStepFunction();
  virtual ~RegularizedHeavisideStepFunction();
private:
  RegularizedHeavisideStepFunction(const Self &); //purposely not implemented
  void operator=(const Self &);                   //purposely not implemented

  RealType m_Epsilon;
  RealType m_OneOverEpsilon;
};
}

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkRegularizedHeavisideStepFunction.hxx"
#endif

#endif