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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 itkSparseFieldLayer_hxx
#define itkSparseFieldLayer_hxx
#include <cmath>
namespace itk
{
template <typename TNodeType>
SparseFieldLayer<TNodeType>::SparseFieldLayer()
{
m_HeadNode->Next = m_HeadNode.get();
m_HeadNode->Previous = m_HeadNode.get();
m_Size = 0;
}
template <typename TNodeType>
void
SparseFieldLayer<TNodeType>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "HeadNode: " << m_HeadNode.get() << std::endl;
os << indent << "Size: " << m_Size << std::endl;
}
template <typename TNodeType>
unsigned int
SparseFieldLayer<TNodeType>::Size() const
{
return m_Size;
}
template <typename TNodeType>
auto
SparseFieldLayer<TNodeType>::SplitRegions(int num) const -> RegionListType
{
std::vector<RegionType> regionlist;
unsigned int size, regionsize;
size = Size();
regionsize = static_cast<unsigned int>(std::ceil(static_cast<float>(size) / static_cast<float>(num)));
ConstIterator position = Begin();
ConstIterator last = End();
for (int i = 0; i < num; ++i)
{
unsigned int j = 0;
RegionType region;
region.first = position;
while ((j < regionsize) && (position != last))
{
++j;
++position;
}
region.last = position;
regionlist.push_back(region);
}
return regionlist;
}
} // end namespace itk
#endif
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