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/*
* Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* 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 otbMetaImageFunction_h
#define otbMetaImageFunction_h
#include "itkFunctionBase.h"
#include "itkPoint.h"
#include "itkVariableLengthVector.h"
#include <vector>
namespace otb
{
/** \class MetaImageFunction
* \brief Concatenate results from multiple ImageFunction
*
* The MetaImageFunction class allows calling multiple ImageFunction at the same location
* and to concatenate their result into a single VariableLengthVector.
*
* In the case of ImageFunction which do not produce VariableLengthVector, one can wrap these
* function using the ImageFunctionAdaptor class, which will translate the image function output to
* a VariableLengthVector.
*
* \ingroup ImageFunction
*
* \ingroup OTBImageBase
*/
template <class TOutputPrecision = double, class TCoordRep = double>
class ITK_EXPORT MetaImageFunction
: public itk::FunctionBase<itk::Point<TCoordRep, 2>,
itk::VariableLengthVector<TOutputPrecision> >
{
public:
// Standard class typedefs
typedef MetaImageFunction Self;
typedef itk::FunctionBase<
itk::Point<TCoordRep, 2>,
itk::VariableLengthVector<TOutputPrecision> > Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
// New macro
itkNewMacro(Self);
// RTTI typeinfo
itkTypeMacro(MetaImageFunction, itk::FunctionBase);
// Input and output typedef
typedef TCoordRep CoordRepType;
typedef itk::Point<CoordRepType, 2> PointType;
typedef TOutputPrecision ValueType;
typedef itk::VariableLengthVector<ValueType> OutputType;
// Compatible functions typedefs
typedef Superclass FunctionType;
typedef typename FunctionType::Pointer FunctionPointerType;
typedef std::vector<FunctionPointerType> FunctionContainerType;
/** Evaluate the function at the given location */
OutputType Evaluate(const PointType & point) const override;
/** Add a new function to the functions vector */
void AddFunction(FunctionType * function);
/** Add a new function the functions vector (compatibility via adapters) */
// template <typename T1, typename T2> void AddFunction(itk::ImageFunction<T1, T2, TCoordRep> * function);
/** Clear functions vector */
void ClearFunctions();
/** Get the number of function registered */
unsigned int GetNumberOfFunctions() const;
/** Retrieve the nth function */
FunctionType * GetNthFunction(unsigned int index);
/** Remove the nth function */
void RemoveNthFunction(unsigned int index);
protected:
/** Constructor */
MetaImageFunction();
/** Destructor */
~MetaImageFunction() override;
/** PrintSelf method */
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
private:
MetaImageFunction(const Self& ); //purposely not implemented
void operator=(const Self& ); //purposely not implemented
FunctionContainerType m_FunctionContainer;
};
} // end namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbMetaImageFunction.txx"
#endif
#endif
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