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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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 itkChainCodePath_hxx
#define itkChainCodePath_hxx
#include "itkNumericTraits.h"
#include "itkPrintHelper.h"
namespace itk
{
template <unsigned int VDimension>
auto
ChainCodePath<VDimension>::EvaluateToIndex(const InputType & input) const -> IndexType
{
/* We could do something fancy here, such as "secretly" store the input and
* total offset from the last time this function was called, and use such
* information to speed up quasi-sequential access. We would have to be
* really, really careful about how we handle the "secret" member data,
* though.
**********************************
* Begin broken, uncompiled Code. *
**********************************
int numberOfSteps = input - m_CurrentPosition;
if( numberOfSteps > 0 )
{
const unsigned int steps = numberOfSteps;
for(unsigned int i=0; i<steps; i++)
{
this->operator++();
}
}
else
{
const unsigned int steps = -numberOfSteps;
for(unsigned int i=0; i<steps; i++)
{
this->operator--();
}
}
return m_CurrentIndex;
***********************************
* End of broken, uncompiled Code. *
**********************************/
IndexType index = m_Start;
// Iterate through the chaincode, summing the offsets as we go.
for (InputType i = 0; i < input; ++i)
{
index += m_Chain[i];
}
return index;
}
template <unsigned int VDimension>
auto
ChainCodePath<VDimension>::IncrementInput(InputType & input) const -> OffsetType
{
if (input < NumberOfSteps())
{
return m_Chain[input++];
}
else
{
return this->GetZeroOffset();
}
}
template <unsigned int VDimension>
ChainCodePath<VDimension>::ChainCodePath()
{
m_Start = this->GetZeroIndex();
}
template <unsigned int VDimension>
void
ChainCodePath<VDimension>::PrintSelf(std::ostream & os, Indent indent) const
{
using namespace print_helper;
Superclass::PrintSelf(os, indent);
os << indent << "Start: " << static_cast<typename NumericTraits<IndexType>::PrintType>(m_Start) << std::endl;
os << indent << "Chain: " << m_Chain << std::endl;
}
} // end namespace itk
#endif
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