itkHeavisideStepFunction.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
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  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.
 *
 *=========================================================================*/
#ifndef __itkHeavisideStepFunction_h
#define __itkHeavisideStepFunction_h

#include "itkHeavisideStepFunctionBase.h"
#include "itkNumericTraits.h"

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

  itkNewMacro(Self);

  itkTypeMacro(HeavisideStepFunction, HeavisideStepFunctionBase);

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

  OutputType Evaluate(const InputType & input) const;

  OutputType EvaluateDerivative(const InputType & input) const;

protected:
  HeavisideStepFunction();
  ~HeavisideStepFunction();

private:
  HeavisideStepFunction(const Self &); //purposely not implemented
  void operator=(const Self &);        //purposely not implemented
};
}

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

#endif