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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 itkWhitakerSparseLevelSetImage_hxx
#define itkWhitakerSparseLevelSetImage_hxx
namespace itk
{
template <typename TOutput, unsigned int VDimension>
WhitakerSparseLevelSetImage<TOutput, VDimension>::WhitakerSparseLevelSetImage()
{
this->InitializeLayers();
this->InitializeInternalLabelList();
}
template <typename TOutput, unsigned int VDimension>
auto
WhitakerSparseLevelSetImage<TOutput, VDimension>::Evaluate(const InputType & inputIndex) const -> OutputType
{
InputType mapIndex = inputIndex - this->m_DomainOffset;
auto layerIt = this->m_Layers.begin();
auto rval = static_cast<OutputType>(ZeroLayer());
while (layerIt != this->m_Layers.end())
{
auto it = (layerIt->second).find(mapIndex);
if (it != (layerIt->second).end())
{
rval = it->second;
break;
}
++layerIt;
}
// if layer not found, look using label map
if (layerIt == this->m_Layers.end())
{
if (this->m_LabelMap.IsNotNull())
{
if (this->m_LabelMap->GetLabelObject(MinusThreeLayer())->HasIndex(mapIndex))
{
rval = static_cast<OutputType>(MinusThreeLayer());
}
else
{
char status = this->m_LabelMap->GetPixel(mapIndex);
if (status == this->PlusThreeLayer())
{
rval = static_cast<OutputType>(this->PlusThreeLayer());
}
else
{
itkGenericExceptionMacro("status " << static_cast<int>(status) << " should be 3 or -3");
}
}
}
else
{
itkGenericExceptionMacro("Note: m_LabelMap is nullptr");
}
}
return rval;
}
template <typename TOutput, unsigned int VDimension>
void
WhitakerSparseLevelSetImage<TOutput, VDimension>::InitializeLayers()
{
this->m_Layers.clear();
this->m_Layers[MinusTwoLayer()] = LayerType();
this->m_Layers[MinusOneLayer()] = LayerType();
this->m_Layers[ZeroLayer()] = LayerType();
this->m_Layers[PlusOneLayer()] = LayerType();
this->m_Layers[PlusTwoLayer()] = LayerType();
}
template <typename TOutput, unsigned int VDimension>
void
WhitakerSparseLevelSetImage<TOutput, VDimension>::InitializeInternalLabelList()
{
this->m_InternalLabelList.clear();
this->m_InternalLabelList.push_back(MinusThreeLayer());
this->m_InternalLabelList.push_back(MinusTwoLayer());
this->m_InternalLabelList.push_back(MinusOneLayer());
this->m_InternalLabelList.push_back(ZeroLayer());
}
} // namespace itk
#endif // itkWhitakerSparseLevelSetImage_hxx
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