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itk::Offset< VDimension > Struct Template Referencefinal
Data Access Objects » Image Access Objects | Group Core » Module ITKCommon

#include <itkOffset.h>

Detailed Description

template<unsigned int VDimension = 2>
struct itk::Offset< VDimension >

Represent a n-dimensional offset between two n-dimensional indexes of n-dimensional image.

Offset is a templated class to represent a multi-dimensional offset, i.e. (i,j,k,...). Offset is templated over the dimension of the space. ITK assumes the first element of a size (bounds) is the fastest moving index.

For efficiency, Offset does not define a default constructor, a copy constructor, or an operator=. We rely on the compiler to provide efficient bitwise copies.

Offset is an "aggregate" class. Its data is public (m_InternalArray) allowing for fast and convenient instantiations/assignments.

The following syntax for assigning an aggregate type like this is allowed/suggested:

Offset<3> var{{ 256, 256, 20 }}; // Also prevent narrowing conversions Offset<3> var = {{ 256, 256, 20 }};

The doubled braces {{ and }} are required to prevent ‘gcc -Wall’ (and perhaps other compilers) from complaining about a partly bracketed initializer.

As an aggregate type that is intended to provide highest performance characteristics, this class is not appropriate to inherit from, so setting this struct as final.

See also
Index
ITK Sphinx Examples:
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Definition at line 69 of file itkOffset.h.

Public Types

using const_iterator = const value_type *
 
using const_reference = const value_type &
 
using const_reverse_iterator = std::reverse_iterator< const_iterator >
 
using difference_type = ptrdiff_t
 
using iterator = value_type *
 
using OffsetType = Offset< VDimension >
 
using OffsetValueType = itk::OffsetValueType
 
using reference = value_type &
 
using reverse_iterator = std::reverse_iterator< iterator >
 
using Self = Offset
 
using size_type = unsigned int
 
using value_type = itk::OffsetValueType
 

Public Member Functions

void assign (const value_type &newValue)
 
reference at (size_type pos)
 
const_reference at (size_type pos) const
 
reference back ()
 
const_reference back () const
 
constexpr iterator begin ()
 
constexpr const_iterator begin () const
 
constexpr const_iterator cbegin () const
 
constexpr const_iterator cend () const
 
OffsetValueType * data ()
 
const OffsetValueType * data () const
 
constexpr bool empty () const
 
constexpr iterator end ()
 
constexpr const_iterator end () const
 
void Fill (OffsetValueType value)
 
reference front ()
 
const_reference front () const
 
OffsetValueType GetElement (unsigned long element) const
 
const OffsetValueType * GetOffset () const
 
constexpr size_type max_size () const
 
const Self operator+ (const Self &vec) const
 
const Self operator+ (const Size< VDimension > &sz) const
 
const Self operator- (const Self &vec) const
 
reference operator[] (size_type pos)
 
const_reference operator[] (size_type pos) const
 
reverse_iterator rbegin ()
 
const_reverse_iterator rbegin () const
 
reverse_iterator rend ()
 
const_reverse_iterator rend () const
 
void SetElement (unsigned long element, OffsetValueType val)
 
void SetOffset (const OffsetValueType val[VDimension])
 
constexpr size_type size () const
 
void swap (Offset &other)
 
const Self & operator+= (const Size< VDimension > &sz)
 
const Self & operator-= (const Size< VDimension > &sz)
 
const Self & operator+= (const Self &vec)
 
const Self & operator-= (const Self &vec)
 
template<typename TCoordRep >
void CopyWithRound (const FixedArray< TCoordRep, VDimension > &point)
 
template<typename TCoordRep >
void CopyWithCast (const FixedArray< TCoordRep, VDimension > &point)
 

Static Public Member Functions

static Self GetBasisOffset (unsigned int dim)
 
static constexpr unsigned int GetOffsetDimension ()
 

Public Attributes

OffsetValueType m_InternalArray [VDimension]
 

Static Public Attributes

static constexpr unsigned int Dimension = VDimension
 

Private Member Functions

void ExceptionThrowingBoundsCheck (size_type pos) const
 

Member Typedef Documentation

◆ const_iterator

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::const_iterator = const value_type *

Definition at line 290 of file itkOffset.h.

◆ const_reference

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::const_reference = const value_type &

Definition at line 288 of file itkOffset.h.

◆ const_reverse_iterator

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::const_reverse_iterator = std::reverse_iterator<const_iterator>

Definition at line 294 of file itkOffset.h.

◆ difference_type

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::difference_type = ptrdiff_t

Definition at line 292 of file itkOffset.h.

◆ iterator

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::iterator = value_type *

Definition at line 289 of file itkOffset.h.

◆ OffsetType

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::OffsetType = Offset<VDimension>

Compatible Offset and value type alias.

Definition at line 79 of file itkOffset.h.

◆ OffsetValueType

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::OffsetValueType = itk::OffsetValueType

Definition at line 80 of file itkOffset.h.

◆ reference

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::reference = value_type &

Definition at line 287 of file itkOffset.h.

◆ reverse_iterator

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::reverse_iterator = std::reverse_iterator<iterator>

Definition at line 293 of file itkOffset.h.

◆ Self

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::Self = Offset

Standard class type aliases.

Definition at line 76 of file itkOffset.h.

◆ size_type

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::size_type = unsigned int

Definition at line 291 of file itkOffset.h.

◆ value_type

template<unsigned int VDimension = 2>
using itk::Offset< VDimension >::value_type = itk::OffsetValueType

Mirror the std::array type aliases and member function so that the Offset class can be treated as a container class in a way that is similar to the std::array.

Definition at line 286 of file itkOffset.h.

Member Function Documentation

◆ assign()

template<unsigned int VDimension = 2>
void itk::Offset< VDimension >::assign ( const value_type &  newValue)
inline

Mirror behavior of the std::array manipulations See std::array for documentation on these methods

Definition at line 301 of file itkOffset.h.

◆ at() [1/2]

template<unsigned int VDimension = 2>
reference itk::Offset< VDimension >::at ( size_type  pos)
inline

Definition at line 395 of file itkOffset.h.

◆ at() [2/2]

template<unsigned int VDimension = 2>
const_reference itk::Offset< VDimension >::at ( size_type  pos) const
inline

Definition at line 402 of file itkOffset.h.

◆ back() [1/2]

template<unsigned int VDimension = 2>
reference itk::Offset< VDimension >::back ( )
inline

Definition at line 421 of file itkOffset.h.

◆ back() [2/2]

template<unsigned int VDimension = 2>
const_reference itk::Offset< VDimension >::back ( ) const
inline

Definition at line 427 of file itkOffset.h.

◆ begin() [1/2]

template<unsigned int VDimension = 2>
constexpr iterator itk::Offset< VDimension >::begin ( )
inlineconstexpr

Definition at line 319 of file itkOffset.h.

Referenced by itk::ConnectedImageNeighborhoodShape< VImageDimension >::FillOffsets(), itk::RectangularImageNeighborhoodShape< VImageDimension >::FillOffsets(), itk::operator<(), and itk::operator==().

◆ begin() [2/2]

template<unsigned int VDimension = 2>
constexpr const_iterator itk::Offset< VDimension >::begin ( ) const
inlineconstexpr

Definition at line 325 of file itkOffset.h.

◆ cbegin()

template<unsigned int VDimension = 2>
constexpr const_iterator itk::Offset< VDimension >::cbegin ( ) const
inlineconstexpr

Definition at line 313 of file itkOffset.h.

◆ cend()

template<unsigned int VDimension = 2>
constexpr const_iterator itk::Offset< VDimension >::cend ( ) const
inlineconstexpr

Definition at line 331 of file itkOffset.h.

◆ CopyWithCast()

template<unsigned int VDimension = 2>
template<typename TCoordRep >
void itk::Offset< VDimension >::CopyWithCast ( const FixedArray< TCoordRep, VDimension > &  point)
inline

Copy values from a FixedArray by casting each one of the components

Definition at line 264 of file itkOffset.h.

References itk::point().

◆ CopyWithRound()

template<unsigned int VDimension = 2>
template<typename TCoordRep >
void itk::Offset< VDimension >::CopyWithRound ( const FixedArray< TCoordRep, VDimension > &  point)
inline

Copy values from a FixedArray by rounding each one of the components

Definition at line 252 of file itkOffset.h.

References itk::point().

◆ data() [1/2]

template<unsigned int VDimension = 2>
OffsetValueType * itk::Offset< VDimension >::data ( )
inline

Definition at line 433 of file itkOffset.h.

Referenced by itk::ImageRegionRange< TImage >::ComputeOffset().

◆ data() [2/2]

template<unsigned int VDimension = 2>
const OffsetValueType * itk::Offset< VDimension >::data ( ) const
inline

Definition at line 439 of file itkOffset.h.

◆ empty()

template<unsigned int VDimension = 2>
constexpr bool itk::Offset< VDimension >::empty ( ) const
inlineconstexpr

Definition at line 385 of file itkOffset.h.

◆ end() [1/2]

template<unsigned int VDimension = 2>
constexpr iterator itk::Offset< VDimension >::end ( )
inlineconstexpr

Definition at line 337 of file itkOffset.h.

Referenced by itk::ConnectedImageNeighborhoodShape< VImageDimension >::FillOffsets(), itk::operator<(), and itk::operator==().

◆ end() [2/2]

template<unsigned int VDimension = 2>
constexpr const_iterator itk::Offset< VDimension >::end ( ) const
inlineconstexpr

Definition at line 343 of file itkOffset.h.

◆ ExceptionThrowingBoundsCheck()

template<unsigned int VDimension = 2>
void itk::Offset< VDimension >::ExceptionThrowingBoundsCheck ( size_type  pos) const
inlineprivate

Definition at line 446 of file itkOffset.h.

◆ Fill()

template<unsigned int VDimension = 2>
void itk::Offset< VDimension >::Fill ( OffsetValueType  value)
inline

Set one value for the offset in all dimensions. Useful for initializing an offset to zero.

Definition at line 226 of file itkOffset.h.

◆ front() [1/2]

template<unsigned int VDimension = 2>
reference itk::Offset< VDimension >::front ( )
inline

Definition at line 409 of file itkOffset.h.

◆ front() [2/2]

template<unsigned int VDimension = 2>
const_reference itk::Offset< VDimension >::front ( ) const
inline

Definition at line 415 of file itkOffset.h.

◆ GetBasisOffset()

template<unsigned int VDimension>
Offset< VDimension > itk::Offset< VDimension >::GetBasisOffset ( unsigned int  dim)
static

Return a basis vector of the form [0, ..., 0, 1, 0, ... 0] where the "1" is positioned in the location specified by the parameter "dim". Valid values of "dim" are 0, ..., VDimension-1.

Definition at line 458 of file itkOffset.h.

References itk::Offset< VDimension >::m_InternalArray.

◆ GetElement()

template<unsigned int VDimension = 2>
OffsetValueType itk::Offset< VDimension >::GetElement ( unsigned long  element) const
inline

Gets the value of one of the elements. This method is mainly intended to facilitate the access to elements from Tcl and Python where C++ notation is not very convenient.

Warning
No bound checking is performed
See also
GetIndex()
SetElement()

Definition at line 218 of file itkOffset.h.

◆ GetOffset()

template<unsigned int VDimension = 2>
const OffsetValueType * itk::Offset< VDimension >::GetOffset ( ) const
inline

Get the offset. This provides a read only pointer to the offset.

See also
SetOffset()

Definition at line 184 of file itkOffset.h.

Referenced by itk::ConstShapedNeighborhoodIterator< TImage, TBoundaryCondition >::ConstIterator::GetNeighborhoodOffset().

◆ GetOffsetDimension()

template<unsigned int VDimension = 2>
static constexpr unsigned int itk::Offset< VDimension >::GetOffsetDimension ( )
inlinestaticconstexpr

Get the dimension (size) of the index.

Definition at line 87 of file itkOffset.h.

◆ max_size()

template<unsigned int VDimension = 2>
constexpr size_type itk::Offset< VDimension >::max_size ( ) const
inlineconstexpr

Definition at line 379 of file itkOffset.h.

◆ operator+() [1/2]

template<unsigned int VDimension = 2>
const Self itk::Offset< VDimension >::operator+ ( const Self &  vec) const
inline

Add two offsets.

Definition at line 95 of file itkOffset.h.

References itk::Offset< VDimension >::m_InternalArray.

◆ operator+() [2/2]

template<unsigned int VDimension = 2>
const Self itk::Offset< VDimension >::operator+ ( const Size< VDimension > &  sz) const
inline

Add a size to an offset.

Definition at line 108 of file itkOffset.h.

◆ operator+=() [1/2]

template<unsigned int VDimension = 2>
const Self & itk::Offset< VDimension >::operator+= ( const Self &  vec)
inline

Increment offset by an offset.

Definition at line 158 of file itkOffset.h.

References itk::Offset< VDimension >::m_InternalArray.

◆ operator+=() [2/2]

template<unsigned int VDimension = 2>
const Self & itk::Offset< VDimension >::operator+= ( const Size< VDimension > &  sz)
inline

Increment index by a size.

Definition at line 121 of file itkOffset.h.

◆ operator-()

template<unsigned int VDimension = 2>
const Self itk::Offset< VDimension >::operator- ( const Self &  vec) const
inline

Subtract two offsets.

Definition at line 145 of file itkOffset.h.

References itk::Offset< VDimension >::m_InternalArray.

◆ operator-=() [1/2]

template<unsigned int VDimension = 2>
const Self & itk::Offset< VDimension >::operator-= ( const Self &  vec)
inline

Decrement offset by an offset.

Definition at line 170 of file itkOffset.h.

References itk::Offset< VDimension >::m_InternalArray.

◆ operator-=() [2/2]

template<unsigned int VDimension = 2>
const Self & itk::Offset< VDimension >::operator-= ( const Size< VDimension > &  sz)
inline

Decrement index by a size.

Definition at line 133 of file itkOffset.h.

◆ operator[]() [1/2]

template<unsigned int VDimension = 2>
reference itk::Offset< VDimension >::operator[] ( size_type  pos)
inline

Definition at line 390 of file itkOffset.h.

◆ operator[]() [2/2]

template<unsigned int VDimension = 2>
const_reference itk::Offset< VDimension >::operator[] ( size_type  pos) const
inline

Definition at line 392 of file itkOffset.h.

◆ rbegin() [1/2]

template<unsigned int VDimension = 2>
reverse_iterator itk::Offset< VDimension >::rbegin ( )
inline

Definition at line 349 of file itkOffset.h.

◆ rbegin() [2/2]

template<unsigned int VDimension = 2>
const_reverse_iterator itk::Offset< VDimension >::rbegin ( ) const
inline

Definition at line 355 of file itkOffset.h.

◆ rend() [1/2]

template<unsigned int VDimension = 2>
reverse_iterator itk::Offset< VDimension >::rend ( )
inline

Definition at line 361 of file itkOffset.h.

◆ rend() [2/2]

template<unsigned int VDimension = 2>
const_reverse_iterator itk::Offset< VDimension >::rend ( ) const
inline

Definition at line 367 of file itkOffset.h.

◆ SetElement()

template<unsigned int VDimension = 2>
void itk::Offset< VDimension >::SetElement ( unsigned long  element,
OffsetValueType  val 
)
inline

Sets the value of one of the elements. This method is mainly intended to facilitate the access to elements from Tcl and Python where C++ notation is not very convenient.

Warning
No bound checking is performed.
See also
SetIndex()
GetElement()

Definition at line 206 of file itkOffset.h.

◆ SetOffset()

template<unsigned int VDimension = 2>
void itk::Offset< VDimension >::SetOffset ( const OffsetValueType  val[VDimension])
inline

Set the index. Try to prototype this function so that val has to point to a block of memory that is the appropriate size.

See also
GetOffset()

Definition at line 194 of file itkOffset.h.

◆ size()

template<unsigned int VDimension = 2>
constexpr size_type itk::Offset< VDimension >::size ( ) const
inlineconstexpr

Definition at line 373 of file itkOffset.h.

◆ swap()

template<unsigned int VDimension = 2>
void itk::Offset< VDimension >::swap ( Offset< VDimension > &  other)
inline

Definition at line 307 of file itkOffset.h.

References itk::Offset< VDimension >::m_InternalArray, and itk::swap().

Member Data Documentation

◆ Dimension

template<unsigned int VDimension = 2>
constexpr unsigned int itk::Offset< VDimension >::Dimension = VDimension
staticconstexpr

Dimension constant

Definition at line 83 of file itkOffset.h.

◆ m_InternalArray

template<unsigned int VDimension = 2>
OffsetValueType itk::Offset< VDimension >::m_InternalArray[VDimension]

Offset is an "aggregate" class. Its data is public (m_InternalArray) allowing for fast and convenient instantiations/assignments. ( See main class documentation for an example of initialization)

Definition at line 246 of file itkOffset.h.

Referenced by itk::Offset< VDimension >::GetBasisOffset(), itk::Offset< VDimension >::operator+(), itk::Offset< VDimension >::operator+=(), itk::Index< VDimension >::operator-(), itk::Offset< VDimension >::operator-(), itk::Offset< VDimension >::operator-=(), itk::Offset< VDimension >::swap(), and itk::swap().

The documentation for this struct was generated from the following file:
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