vtkSortDataArray Class Reference

provides several methods for sorting VTK arrays. More...

#include <vtkSortDataArray.h>

Inheritance diagram for vtkSortDataArray:

Collaboration diagram for vtkSortDataArray:

Static Public Member Functions
static void	Sort (vtkIdList *keys)
	Sorts the given array in ascending order.
static void	Sort (vtkAbstractArray *keys)
static void	Sort (vtkAbstractArray *keys, vtkAbstractArray *values)
	Sorts the given key/value pairs based on the keys (the keys are expected to be 1-tuples, values may have number of components >= 1).
static void	Sort (vtkAbstractArray *keys, vtkIdList *values)
static void	SortArrayByComponent (vtkAbstractArray *arr, int k)
	Sorts the given data array using the specified component as a key.
static void	SortArrayByComponent (vtkAbstractArray *arr, int k, int dir)
	Sorts the given data array using the specified component as a key.
static void	Sort (vtkIdList *keys, int dir)
	Sorts the given array in either ascending (dir=0) or descending (dir!=0) order.
static void	Sort (vtkAbstractArray *keys, int dir)
	Sorts the given array in either ascending (dir=0) or descending (dir!=0) order.
static void	Sort (vtkAbstractArray *keys, vtkAbstractArray *values, int dir)
	Sorts the given key/value pairs based on the keys (the keys are expected to be 1-tuples, values may have number of components >= 1).
static void	Sort (vtkAbstractArray *keys, vtkIdList *values, int dir)
	Sorts the given key/value pairs based on the keys (the keys are expected to be 1-tuples, values may have number of components >= 1).
static vtkIdType *	InitializeSortIndices (vtkIdType numKeys)
	The following are general functions which can be used to produce an ordering, and/or sort various types of VTK arrays.
static void	GenerateSortIndices (int dataType, void *dataIn, vtkIdType numKeys, int numComp, int k, vtkIdType *idx)
	The following are general functions which can be used to produce an ordering, and/or sort various types of VTK arrays.
static void	ShuffleArray (vtkIdType *idx, int dataType, vtkIdType numKeys, int numComp, vtkAbstractArray *arr, void *dataIn, int dir)
	The following are general functions which can be used to produce an ordering, and/or sort various types of VTK arrays.
static void	ShuffleIdList (vtkIdType *idx, vtkIdType sze, vtkIdList *arrayIn, vtkIdType *dataIn, int dir)
	The following are general functions which can be used to produce an ordering, and/or sort various types of VTK arrays.
Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
static void	BreakOnError ()
	This method is called when vtkErrorMacro executes.
static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.
static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.
static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.
Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class.
static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.
static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Protected Member Functions
	vtkSortDataArray ()
	~vtkSortDataArray () override
Protected Member Functions inherited from vtkObject
	vtkObject ()
	~vtkObject () override
void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override
void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override
void	InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events.
void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events.
Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()
virtual	~vtkObjectBase ()
virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)
virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)
virtual void	ReportReferences (vtkGarbageCollector *)
	vtkObjectBase (const vtkObjectBase &)
void	operator= (const vtkObjectBase &)

Static Protected Member Functions
static void	GenerateSort1Indices (int dataType, void *dataIn, vtkIdType numKeys, vtkIdType *idx)
static void	Shuffle1Array (vtkIdType *idx, int dataType, vtkIdType numKeys, vtkAbstractArray *arr, void *dataIn, int dir)
Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()
static vtkReallocingFunction	GetCurrentReallocFunction ()
static vtkFreeingFunction	GetCurrentFreeFunction ()
static vtkFreeingFunction	GetAlternateFreeFunction ()
typedef vtkObject	Superclass
	Standard VTK methods for instantiating, managing type, and printing information about this class.
static vtkSortDataArray *	New ()
	Standard VTK methods for instantiating, managing type, and printing information about this class.
static vtkTypeBool	IsTypeOf (const char *type)
	Standard VTK methods for instantiating, managing type, and printing information about this class.
static vtkSortDataArray *	SafeDownCast (vtkObjectBase *o)
	Standard VTK methods for instantiating, managing type, and printing information about this class.
virtual vtkTypeBool	IsA (const char *type)
	Standard VTK methods for instantiating, managing type, and printing information about this class.
vtkSortDataArray *	NewInstance () const
	Standard VTK methods for instantiating, managing type, and printing information about this class.
void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard VTK methods for instantiating, managing type, and printing information about this class.
virtual vtkObjectBase *	NewInstanceInternal () const
	Standard VTK methods for instantiating, managing type, and printing information about this class.

Additional Inherited Members
Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)
virtual void	DebugOn ()
	Turn debugging output on.
virtual void	DebugOff ()
	Turn debugging output off.
bool	GetDebug ()
	Get the value of the debug flag.
void	SetDebug (bool debugFlag)
	Set the value of the debug flag.
virtual void	Modified ()
	Update the modification time for this object.
virtual vtkMTimeType	GetMTime ()
	Return this object's modified time.
void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.
void	RemoveObserver (unsigned long tag)
void	RemoveObservers (unsigned long event)
void	RemoveObservers (const char *event)
void	RemoveAllObservers ()
vtkTypeBool	HasObserver (unsigned long event)
vtkTypeBool	HasObserver (const char *event)
int	InvokeEvent (unsigned long event)
int	InvokeEvent (const char *event)
unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
unsigned long	AddObserver (const char *event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
void	RemoveObservers (const char *event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
vtkTypeBool	HasObserver (const char *event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method.
int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
int	InvokeEvent (const char *event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.
virtual vtkTypeBool	IsA (const char *name)
	Return 1 if this class is the same type of (or a subclass of) the named class.
virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
virtual void	Delete ()
	Delete a VTK object.
virtual void	FastDelete ()
	Delete a reference to this object.
void	InitializeObjectBase ()
void	Print (ostream &os)
	Print an object to an ostream.
virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).
virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object).
int	GetReferenceCount ()
	Return the current reference count of this object.
void	SetReferenceCount (int)
	Sets the reference count.
bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.
virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.
virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.
Protected Attributes inherited from vtkObject
bool	Debug
vtkTimeStamp	MTime
vtkSubjectHelper *	SubjectHelper
Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount
vtkWeakPointerBase **	WeakPointers

Detailed Description

provides several methods for sorting VTK arrays.

vtkSortDataArray is used to sort data, based on its value, or with an associated key, into either ascending or descending order. This is useful for operations like selection, or analysis, when evaluating and processing data. A variety of sorting functions are provided, treating both arrays (i.e., vtkAbstractArray) and id lists (vtkIdList). Note that complex arrays like variants and string arrays are also handled.

Additional functionality is provided to generate data ordering, without necessarily shuffling the data into a final, sorted position. Hence, the sorting process is organized into three steps because of the complexity of dealing with multiple types and multiple component data arrays. The first step involves creating and initializing a sorted index array, and then (second step) sorting this array to produce a map indicating the sorting order. In other words, the sorting index array is a permutation which can be applied to other, associated data to shuffle it (third step) into an order consistent with the sorting operation. Note that the generation of the sorted index array is useful unto itself (even without the final shuffling of data) because it generates an ordered list (from the data values of any component in any array). So for example, it is possible to find the top N cells with the largest scalar value simply by generating the sorting index array from the call scalar values.

Warning

This class has been threaded with vtkSMPTools. Using TBB or other non-sequential type (set in the CMake variable VTK_SMP_IMPLEMENTATION_TYPE) may improve performance significantly on multi-core machines.

The sort methods below are static, hence the sorting methods can be used without instantiating the class. All methods are thread safe.

See also

vtkSortFieldData

Online Examples:

SortDataArray

Definition at line 94 of file vtkSortDataArray.h.

Member Typedef Documentation

Superclass

typedef vtkObject vtkSortDataArray::Superclass

Standard VTK methods for instantiating, managing type, and printing information about this class.

Definition at line 103 of file vtkSortDataArray.h.

Constructor & Destructor Documentation

vtkSortDataArray()

vtkSortDataArray::vtkSortDataArray ( )

protected

~vtkSortDataArray()

vtkSortDataArray::~vtkSortDataArray ( )

overrideprotected

Member Function Documentation

New()

static vtkSortDataArray * vtkSortDataArray::New ( )

static

Standard VTK methods for instantiating, managing type, and printing information about this class.

IsTypeOf()

static vtkTypeBool vtkSortDataArray::IsTypeOf ( const char *  type )

static

Standard VTK methods for instantiating, managing type, and printing information about this class.

IsA()

virtual vtkTypeBool vtkSortDataArray::IsA ( const char *  type )

virtual

Standard VTK methods for instantiating, managing type, and printing information about this class.

Reimplemented from vtkObjectBase.

Reimplemented in vtkSortFieldData.

SafeDownCast()

static vtkSortDataArray * vtkSortDataArray::SafeDownCast ( vtkObjectBase *  o )

static

Standard VTK methods for instantiating, managing type, and printing information about this class.

NewInstanceInternal()

virtual vtkObjectBase * vtkSortDataArray::NewInstanceInternal ( ) const

protectedvirtual

Standard VTK methods for instantiating, managing type, and printing information about this class.

Reimplemented in vtkSortFieldData.

NewInstance()

vtkSortDataArray * vtkSortDataArray::NewInstance

(

)

const

Standard VTK methods for instantiating, managing type, and printing information about this class.

PrintSelf()

void vtkSortDataArray::PrintSelf ( ostream &  os, vtkIndent  indent  )

overridevirtual

Standard VTK methods for instantiating, managing type, and printing information about this class.

Reimplemented from vtkObject.

Reimplemented in vtkSortFieldData.

Sort() [1/8]

static void vtkSortDataArray::Sort ( vtkIdList *  keys )

inlinestatic

Sorts the given array in ascending order.

For this method, the keys must be single-component tuples.

Definition at line 111 of file vtkSortDataArray.h.

Sort() [2/8]

static void vtkSortDataArray::Sort ( vtkAbstractArray *  keys )

inlinestatic

Definition at line 112 of file vtkSortDataArray.h.

Sort() [3/8]

static void vtkSortDataArray::Sort ( vtkIdList *  keys, int  dir  )

static

Sorts the given array in either ascending (dir=0) or descending (dir!=0) order.

For this method, the keys must be single-component tuples.

Sort() [4/8]

static void vtkSortDataArray::Sort ( vtkAbstractArray *  keys, int  dir  )

static

Sorts the given array in either ascending (dir=0) or descending (dir!=0) order.

For this method, the keys must be single-component tuples.

Sort() [5/8]

static void vtkSortDataArray::Sort ( vtkAbstractArray *  keys, vtkAbstractArray *  values  )

inlinestatic

Sorts the given key/value pairs based on the keys (the keys are expected to be 1-tuples, values may have number of components >= 1).

Obviously, the two arrays must be of equal size. Sorts in ascending order.

Definition at line 129 of file vtkSortDataArray.h.

Sort() [6/8]

static void vtkSortDataArray::Sort ( vtkAbstractArray *  keys, vtkIdList *  values  )

inlinestatic

Definition at line 133 of file vtkSortDataArray.h.

Sort() [7/8]

static void vtkSortDataArray::Sort ( vtkAbstractArray *  keys, vtkAbstractArray *  values, int  dir  )

static

Sorts the given key/value pairs based on the keys (the keys are expected to be 1-tuples, values may have number of components >= 1).

Obviously, the two arrays must be of equal size. Sorts in either ascending (dir=0) or descending (dir=1) order.

Sort() [8/8]

static void vtkSortDataArray::Sort ( vtkAbstractArray *  keys, vtkIdList *  values, int  dir  )

static

Sorts the given key/value pairs based on the keys (the keys are expected to be 1-tuples, values may have number of components >= 1).

Obviously, the two arrays must be of equal size. Sorts in either ascending (dir=0) or descending (dir=1) order.

SortArrayByComponent() [1/2]

static void vtkSortDataArray::SortArrayByComponent ( vtkAbstractArray *  arr, int  k  )

inlinestatic

Sorts the given data array using the specified component as a key.

Think of the array as a 2-D grid with each tuple representing a row. Tuples are swapped until the k-th column of the grid is monotonically increasing. Where two tuples have the same value for the k-th component, their order in the final result is unspecified.

Definition at line 156 of file vtkSortDataArray.h.

SortArrayByComponent() [2/2]

static void vtkSortDataArray::SortArrayByComponent ( vtkAbstractArray *  arr, int  k, int  dir  )

static

Sorts the given data array using the specified component as a key.

Think of the array as a 2-D grid with each tuple representing a row. Tuples are swapped until the k-th column of the grid is ascending (dir=0) or descending (dir=1). Where two tuples have the same value for the k-th component, their order in the final result is unspecified.

InitializeSortIndices()

static vtkIdType * vtkSortDataArray::InitializeSortIndices ( vtkIdType  numKeys )

static

The following are general functions which can be used to produce an ordering, and/or sort various types of VTK arrays.

Don't use these methods unless you really know what you are doing. The basic idea is that an initial set of indices (InitializeSortIndices() that refer to the data contained in a vtkAbstractArray or vtkIdList) are sorted (GenerateSortIndices() based on the data values in the array). The result of the sort is the creation of a permutation array (the sort array idx) that indicates where the data tuples originated (e.g., after the sort, idx[0] indicates where in the array the tuple was originally located prior to sorting.) This sorted index array can be used to shuffle various types of VTK arrays (the types supported correspond to the various arrays which are subclasses of vtkDataArrayTemplate, use ShuffleArray() or for vtkIdList, use ShuffleIdList()). Also, the sort array, being an vtkIdType* (i.e., id list), can also be used to identify points or cells in sorted order (based on the data in the originating dataIn array). Note that sorting is always performed in ascending order, and the sorted index array reflects this; however the shuffling of data can be specified as either ascending (dir=0) or descending (dir=1) order. The user is responsible for taking ownership of the sort indices (i.e., free the idx array).

GenerateSortIndices()

static void vtkSortDataArray::GenerateSortIndices ( int  dataType, void *  dataIn, vtkIdType  numKeys, int  numComp, int  k, vtkIdType *  idx  )

static

The following are general functions which can be used to produce an ordering, and/or sort various types of VTK arrays.

Don't use these methods unless you really know what you are doing. The basic idea is that an initial set of indices (InitializeSortIndices() that refer to the data contained in a vtkAbstractArray or vtkIdList) are sorted (GenerateSortIndices() based on the data values in the array). The result of the sort is the creation of a permutation array (the sort array idx) that indicates where the data tuples originated (e.g., after the sort, idx[0] indicates where in the array the tuple was originally located prior to sorting.) This sorted index array can be used to shuffle various types of VTK arrays (the types supported correspond to the various arrays which are subclasses of vtkDataArrayTemplate, use ShuffleArray() or for vtkIdList, use ShuffleIdList()). Also, the sort array, being an vtkIdType* (i.e., id list), can also be used to identify points or cells in sorted order (based on the data in the originating dataIn array). Note that sorting is always performed in ascending order, and the sorted index array reflects this; however the shuffling of data can be specified as either ascending (dir=0) or descending (dir=1) order. The user is responsible for taking ownership of the sort indices (i.e., free the idx array).

ShuffleArray()

static void vtkSortDataArray::ShuffleArray ( vtkIdType *  idx, int  dataType, vtkIdType  numKeys, int  numComp, vtkAbstractArray *  arr, void *  dataIn, int  dir  )

static

The following are general functions which can be used to produce an ordering, and/or sort various types of VTK arrays.

Don't use these methods unless you really know what you are doing. The basic idea is that an initial set of indices (InitializeSortIndices() that refer to the data contained in a vtkAbstractArray or vtkIdList) are sorted (GenerateSortIndices() based on the data values in the array). The result of the sort is the creation of a permutation array (the sort array idx) that indicates where the data tuples originated (e.g., after the sort, idx[0] indicates where in the array the tuple was originally located prior to sorting.) This sorted index array can be used to shuffle various types of VTK arrays (the types supported correspond to the various arrays which are subclasses of vtkDataArrayTemplate, use ShuffleArray() or for vtkIdList, use ShuffleIdList()). Also, the sort array, being an vtkIdType* (i.e., id list), can also be used to identify points or cells in sorted order (based on the data in the originating dataIn array). Note that sorting is always performed in ascending order, and the sorted index array reflects this; however the shuffling of data can be specified as either ascending (dir=0) or descending (dir=1) order. The user is responsible for taking ownership of the sort indices (i.e., free the idx array).

ShuffleIdList()

static void vtkSortDataArray::ShuffleIdList ( vtkIdType *  idx, vtkIdType  sze, vtkIdList *  arrayIn, vtkIdType *  dataIn, int  dir  )

static

The following are general functions which can be used to produce an ordering, and/or sort various types of VTK arrays.

Don't use these methods unless you really know what you are doing. The basic idea is that an initial set of indices (InitializeSortIndices() that refer to the data contained in a vtkAbstractArray or vtkIdList) are sorted (GenerateSortIndices() based on the data values in the array). The result of the sort is the creation of a permutation array (the sort array idx) that indicates where the data tuples originated (e.g., after the sort, idx[0] indicates where in the array the tuple was originally located prior to sorting.) This sorted index array can be used to shuffle various types of VTK arrays (the types supported correspond to the various arrays which are subclasses of vtkDataArrayTemplate, use ShuffleArray() or for vtkIdList, use ShuffleIdList()). Also, the sort array, being an vtkIdType* (i.e., id list), can also be used to identify points or cells in sorted order (based on the data in the originating dataIn array). Note that sorting is always performed in ascending order, and the sorted index array reflects this; however the shuffling of data can be specified as either ascending (dir=0) or descending (dir=1) order. The user is responsible for taking ownership of the sort indices (i.e., free the idx array).

GenerateSort1Indices()

static void vtkSortDataArray::GenerateSort1Indices ( int  dataType, void *  dataIn, vtkIdType  numKeys, vtkIdType *  idx  )

staticprotected

Shuffle1Array()

static void vtkSortDataArray::Shuffle1Array ( vtkIdType *  idx, int  dataType, vtkIdType  numKeys, vtkAbstractArray *  arr, void *  dataIn, int  dir  )

staticprotected

---

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

• Common/Core/vtkSortDataArray.h