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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 itkLevelSetNode_h
#define itkLevelSetNode_h
#include "itkIndex.h"
#include "itkImage.h"
#include "itkVectorContainer.h"
#include "itkVector.h"
namespace itk
{
/**
* \class LevelSetNode
* \brief Represent a node in a level set.
*
* LevelSetNode is a simple templated class that represents a node
* or grid position of a level set. A group or collection of
* LevelSetNode can then be used to represents a narrowband or
* region of interest.
*
* LevelSetNode is templated over the data type and dimension of the
* level set.
*
* \ingroup LevelSetSegmentation
*
* \ingroup ITKFastMarching
*/
template <typename TPixel, unsigned int VSetDimension = 2>
class LevelSetNode
{
public:
/** Standard class type aliases. */
using Self = LevelSetNode;
/** Pixel type alias. */
using PixelType = TPixel;
/** Level set dimension. */
static constexpr unsigned int SetDimension = VSetDimension;
/** Index type alias. */
using IndexType = Index<VSetDimension>;
/** Operator >. A LevelSetNode is sorted by its value field. */
bool
operator>(const Self & node) const
{
return m_Value > node.m_Value;
}
/** Operator <. A LevelSetNode is sorted by its value field. */
bool
operator<(const Self & node) const
{
return m_Value < node.m_Value;
}
/** Operator <=. A LevelSetNode is sorted by its value field. */
bool
operator<=(const Self & node) const
{
return m_Value <= node.m_Value;
}
/** Operator >=. A LevelSetNode is sorted by its value field. */
bool
operator>=(const Self & node) const
{
return m_Value >= node.m_Value;
}
/** Operator =. Two nodes are equal if both their value and index fields
* are the same. */
Self &
operator=(const Self & rhs)
{
if (this != &rhs)
{
m_Value = rhs.m_Value;
m_Index = rhs.m_Index;
}
return *this;
}
/** Get/Set level set value. */
PixelType &
GetValue()
{
return m_Value;
}
const PixelType &
GetValue() const
{
return m_Value;
}
void
SetValue(const PixelType & input)
{
m_Value = input;
}
/** Get/Set index. */
IndexType &
GetIndex()
{
return m_Index;
}
const IndexType &
GetIndex() const
{
return m_Index;
}
void
SetIndex(const IndexType & input)
{
m_Index = input;
}
/** Default constructor */
LevelSetNode()
: m_Value(PixelType{})
{
m_Index.Fill(0);
}
/** Copy constructor */
LevelSetNode(const Self & node)
: m_Value(node.m_Value)
, m_Index(node.m_Index)
{}
private:
PixelType m_Value;
IndexType m_Index;
};
} // end namespace itk
#endif
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