create 3D Delaunay triangulation of input points More...

#include <vtkDelaunay3D.h>

Inheritance diagram for vtkDelaunay3D:

Collaboration diagram for vtkDelaunay3D:

Public Types
typedef vtkUnstructuredGridAlgorithm	Superclass

Public Types inherited from vtkUnstructuredGridAlgorithm
typedef vtkAlgorithm	Superclass

Public Types inherited from vtkAlgorithm
enum	DesiredOutputPrecision { SINGLE_PRECISION, DOUBLE_PRECISION, DEFAULT_PRECISION }
	Values used for setting the desired output precision for various algorithms. More...

typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class. More...

vtkDelaunay3D *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses. More...

virtual void	SetAlpha (double)
	Specify alpha (or distance) value to control output of this filter. More...

virtual double	GetAlpha ()

virtual void	SetAlphaTets (vtkTypeBool)
	Boolean controls whether tetrahedra are output for non-zero alpha values. More...

virtual vtkTypeBool	GetAlphaTets ()

virtual void	AlphaTetsOn ()

virtual void	AlphaTetsOff ()

virtual void	SetAlphaTris (vtkTypeBool)
	Boolean controls whether triangles are output for non-zero alpha values. More...

virtual vtkTypeBool	GetAlphaTris ()

virtual void	AlphaTrisOn ()

virtual void	AlphaTrisOff ()

virtual void	SetAlphaLines (vtkTypeBool)
	Boolean controls whether lines are output for non-zero alpha values. More...

virtual vtkTypeBool	GetAlphaLines ()

virtual void	AlphaLinesOn ()

virtual void	AlphaLinesOff ()

virtual void	SetAlphaVerts (vtkTypeBool)
	Boolean controls whether vertices are output for non-zero alpha values. More...

virtual vtkTypeBool	GetAlphaVerts ()

virtual void	AlphaVertsOn ()

virtual void	AlphaVertsOff ()

virtual void	SetTolerance (double)
	Specify a tolerance to control discarding of closely spaced points. More...

virtual double	GetTolerance ()

virtual void	SetOffset (double)
	Specify a multiplier to control the size of the initial, bounding Delaunay triangulation. More...

virtual double	GetOffset ()

virtual void	SetBoundingTriangulation (vtkTypeBool)
	Boolean controls whether bounding triangulation points (and associated triangles) are included in the output. More...

virtual vtkTypeBool	GetBoundingTriangulation ()

virtual void	BoundingTriangulationOn ()

virtual void	BoundingTriangulationOff ()

void	SetLocator (vtkIncrementalPointLocator *locator)
	Set / get a spatial locator for merging points. More...

virtual vtkIncrementalPointLocator *	GetLocator ()

void	CreateDefaultLocator ()
	Create default locator. More...

vtkUnstructuredGrid *	InitPointInsertion (double center[3], double length, vtkIdType numPts, vtkPoints *&pts)
	This is a helper method used with InsertPoint() to create tetrahedronalizations of points. More...

void	InsertPoint (vtkUnstructuredGrid Mesh, vtkPoints points, vtkIdType id, double x[3], vtkIdList *holeTetras)
	This is a helper method used with InitPointInsertion() to create tetrahedronalizations of points. More...

void	EndPointInsertion ()
	Invoke this method after all points have been inserted. More...

vtkMTimeType	GetMTime () override
	Return the MTime also considering the locator. More...

virtual void	SetOutputPointsPrecision (int)
	Set/get the desired precision for the output types. More...

virtual int	GetOutputPointsPrecision ()

Public Member Functions inherited from vtkUnstructuredGridAlgorithm
vtkUnstructuredGridAlgorithm *	NewInstance () const

vtkUnstructuredGrid *	GetOutput ()
	Get the output data object for a port on this algorithm. More...

vtkUnstructuredGrid *	GetOutput (int)

virtual void	SetOutput (vtkDataObject *d)

vtkTypeBool	ProcessRequest (vtkInformation , vtkInformationVector , vtkInformationVector ) override
	see vtkAlgorithm for details More...

vtkDataObject *	GetInput (int port)

vtkDataObject *	GetInput ()

vtkUnstructuredGrid *	GetUnstructuredGridInput (int port)

void	SetInputData (vtkDataObject *)
	Assign a data object as input. More...

void	SetInputData (int, vtkDataObject *)

void	AddInputData (vtkDataObject *)
	Assign a data object as input. More...

void	AddInputData (int, vtkDataObject *)

Public Member Functions inherited from vtkAlgorithm
vtkAlgorithm *	NewInstance () const

int	HasExecutive ()
	Check whether this algorithm has an assigned executive. More...

vtkExecutive *	GetExecutive ()
	Get this algorithm's executive. More...

virtual void	SetExecutive (vtkExecutive *executive)
	Set this algorithm's executive. More...

vtkTypeBool	ProcessRequest (vtkInformation request, vtkCollection inInfo, vtkInformationVector *outInfo)
	Version of ProcessRequest() that is wrapped. More...

virtual int	ComputePipelineMTime (vtkInformation request, vtkInformationVector inInfoVec, vtkInformationVector outInfoVec, int requestFromOutputPort, vtkMTimeType *mtime)
	A special version of ProcessRequest meant specifically for the pipeline modified time request. More...

virtual int	ModifyRequest (vtkInformation *request, int when)
	This method gives the algorithm a chance to modify the contents of a request before or after (specified in the when argument) it is forwarded. More...

vtkInformation *	GetInputPortInformation (int port)
	Get the information object associated with an input port. More...

vtkInformation *	GetOutputPortInformation (int port)
	Get the information object associated with an output port. More...

virtual vtkInformation *	GetInformation ()
	Set/Get the information object associated with this algorithm. More...

virtual void	SetInformation (vtkInformation *)

int	GetNumberOfInputPorts ()
	Get the number of input ports used by the algorithm. More...

int	GetNumberOfOutputPorts ()
	Get the number of output ports provided by the algorithm. More...

void	Register (vtkObjectBase *o) override
	Participate in garbage collection. More...

void	UnRegister (vtkObjectBase *o) override
	Decrease the reference count (release by another object). More...

virtual void	SetAbortExecute (vtkTypeBool)
	Set/Get the AbortExecute flag for the process object. More...

virtual vtkTypeBool	GetAbortExecute ()

virtual void	AbortExecuteOn ()

virtual void	AbortExecuteOff ()

virtual double	GetProgress ()
	Get the execution progress of a process object. More...

void	SetProgress (double)
	`SetProgress` is deprecated. More...

void	UpdateProgress (double amount)
	Update the progress of the process object. More...

void	SetProgressShiftScale (double shift, double scale)
	Specify the shift and scale values to use to apply to the progress amount when `UpdateProgress` is called. More...

virtual double	GetProgressShift ()

virtual double	GetProgressScale ()

void	SetProgressText (const char *ptext)
	Set the current text message associated with the progress state. More...

virtual char *	GetProgressText ()

virtual unsigned long	GetErrorCode ()
	The error code contains a possible error that occurred while reading or writing the file. More...

virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, const char *name)
	Set the input data arrays that this algorithm will process. More...

virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, int fieldAttributeType)

virtual void	SetInputArrayToProcess (int idx, vtkInformation *info)

virtual void	SetInputArrayToProcess (int idx, int port, int connection, const char fieldAssociation, const char attributeTypeorName)
	String based versions of SetInputArrayToProcess(). More...

vtkInformation *	GetInputArrayInformation (int idx)
	Get the info object for the specified input array to this algorithm. More...

void	RemoveAllInputs ()
	Remove all the input data. More...

vtkDataObject *	GetOutputDataObject (int port)
	Get the data object that will contain the algorithm output for the given port. More...

vtkDataObject *	GetInputDataObject (int port, int connection)
	Get the data object that will contain the algorithm input for the given port and given connection. More...

virtual void	SetInputConnection (int port, vtkAlgorithmOutput *input)
	Set the connection for the given input port index. More...

virtual void	SetInputConnection (vtkAlgorithmOutput *input)

virtual void	AddInputConnection (int port, vtkAlgorithmOutput *input)
	Add a connection to the given input port index. More...

virtual void	AddInputConnection (vtkAlgorithmOutput *input)

virtual void	RemoveInputConnection (int port, vtkAlgorithmOutput *input)
	Remove a connection from the given input port index. More...

virtual void	RemoveInputConnection (int port, int idx)
	Remove a connection given by index idx. More...

virtual void	RemoveAllInputConnections (int port)
	Removes all input connections. More...

virtual void	SetInputDataObject (int port, vtkDataObject *data)
	Sets the data-object as an input on the given port index. More...

virtual void	SetInputDataObject (vtkDataObject *data)

virtual void	AddInputDataObject (int port, vtkDataObject *data)
	Add the data-object as an input to this given port. More...

virtual void	AddInputDataObject (vtkDataObject *data)

vtkAlgorithmOutput *	GetOutputPort (int index)
	Get a proxy object corresponding to the given output port of this algorithm. More...

vtkAlgorithmOutput *	GetOutputPort ()

int	GetNumberOfInputConnections (int port)
	Get the number of inputs currently connected to a port. More...

int	GetTotalNumberOfInputConnections ()
	Get the total number of inputs for this algorithm. More...

vtkAlgorithmOutput *	GetInputConnection (int port, int index)
	Get the algorithm output port connected to an input port. More...

vtkAlgorithm *	GetInputAlgorithm (int port, int index, int &algPort)
	Returns the algorithm and the output port index of that algorithm connected to a port-index pair. More...

vtkAlgorithm *	GetInputAlgorithm (int port, int index)
	Returns the algorithm connected to a port-index pair. More...

vtkAlgorithm *	GetInputAlgorithm ()
	Equivalent to GetInputAlgorithm(0, 0). More...

vtkExecutive *	GetInputExecutive (int port, int index)
	Returns the executive associated with a particular input connection. More...

vtkExecutive *	GetInputExecutive ()
	Equivalent to GetInputExecutive(0, 0) More...

vtkInformation *	GetInputInformation (int port, int index)
	Return the information object that is associated with a particular input connection. More...

vtkInformation *	GetInputInformation ()
	Equivalent to GetInputInformation(0, 0) More...

vtkInformation *	GetOutputInformation (int port)
	Return the information object that is associated with a particular output port. More...

virtual void	Update (int port)
	Bring this algorithm's outputs up-to-date. More...

virtual void	Update ()

virtual vtkTypeBool	Update (int port, vtkInformationVector *requests)
	This method enables the passing of data requests to the algorithm to be used during execution (in addition to bringing a particular port up-to-date). More...

virtual vtkTypeBool	Update (vtkInformation *requests)
	Convenience method to update an algorithm after passing requests to its first output port. More...

virtual int	UpdatePiece (int piece, int numPieces, int ghostLevels, const int extents[6]=nullptr)
	Convenience method to update an algorithm after passing requests to its first output port. More...

virtual int	UpdateExtent (const int extents[6])
	Convenience method to update an algorithm after passing requests to its first output port. More...

virtual int	UpdateTimeStep (double time, int piece=-1, int numPieces=1, int ghostLevels=0, const int extents[6]=nullptr)
	Convenience method to update an algorithm after passing requests to its first output port. More...

virtual void	UpdateInformation ()
	Bring the algorithm's information up-to-date. More...

virtual void	UpdateDataObject ()
	Create output object(s). More...

virtual void	PropagateUpdateExtent ()
	Propagate meta-data upstream. More...

virtual void	UpdateWholeExtent ()
	Bring this algorithm's outputs up-to-date. More...

void	ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
	Convenience routine to convert from a linear ordering of input connections to a port/connection pair. More...

virtual void	SetReleaseDataFlag (int)
	Turn release data flag on or off for all output ports. More...

virtual int	GetReleaseDataFlag ()

void	ReleaseDataFlagOn ()

void	ReleaseDataFlagOff ()

int	UpdateExtentIsEmpty (vtkInformation pinfo, vtkDataObject output)
	This detects when the UpdateExtent will generate no data This condition is satisfied when the UpdateExtent has zero volume (0,-1,...) or the UpdateNumberOfPieces is 0. More...

int	UpdateExtentIsEmpty (vtkInformation *pinfo, int extentType)

int *	GetUpdateExtent ()
	These functions return the update extent for output ports that use 3D extents. More...

int *	GetUpdateExtent (int port)

void	GetUpdateExtent (int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)

void	GetUpdateExtent (int port, int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)

void	GetUpdateExtent (int extent[6])

void	GetUpdateExtent (int port, int extent[6])

int	GetUpdatePiece ()
	These functions return the update extent for output ports that use piece extents. More...

int	GetUpdatePiece (int port)

int	GetUpdateNumberOfPieces ()

int	GetUpdateNumberOfPieces (int port)

int	GetUpdateGhostLevel ()

int	GetUpdateGhostLevel (int port)

void	SetProgressObserver (vtkProgressObserver *)
	If an ProgressObserver is set, the algorithm will report progress through it rather than directly. More...

virtual vtkProgressObserver *	GetProgressObserver ()

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on. More...

virtual void	DebugOff ()
	Turn debugging output off. More...

bool	GetDebug ()
	Get the value of the debug flag. More...

void	SetDebug (bool debugFlag)
	Set the value of the debug flag. More...

virtual void	Modified ()
	Update the modification time for this object. More...

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)

vtkCommand *	GetCommand (unsigned long tag)

void	RemoveObserver (vtkCommand *)

void	RemoveObservers (unsigned long event, vtkCommand *)

void	RemoveObservers (const char event, vtkCommand )

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)

vtkTypeBool	HasObserver (const char event, vtkCommand )

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)

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. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)

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. More...

int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not. More...

int	InvokeEvent (const char event, void callData)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string. More...

virtual void	Delete ()
	Delete a VTK object. More...

virtual void	FastDelete ()
	Delete a reference to this object. More...

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream. More...

virtual void	PrintHeader (ostream &os, vtkIndent indent)

virtual void	PrintTrailer (ostream &os, vtkIndent indent)

int	GetReferenceCount ()
	Return the current reference count of this object. More...

void	SetReferenceCount (int)
	Sets the reference count. More...

void	PrintRevisions (ostream &)
	Legacy. More...

Static Public Member Functions
static vtkTypeBool	IsTypeOf (const char *type)

static vtkDelaunay3D *	SafeDownCast (vtkObjectBase *o)

static vtkDelaunay3D *	New ()
	Construct object with Alpha = 0.0; Tolerance = 0.001; Offset = 2.5; BoundingTriangulation turned off. More...

Static Public Member Functions inherited from vtkUnstructuredGridAlgorithm
static vtkUnstructuredGridAlgorithm *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkUnstructuredGridAlgorithm *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkAlgorithm
static vtkAlgorithm *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkAlgorithm *	SafeDownCast (vtkObjectBase *o)

static vtkInformationIntegerKey *	INPUT_IS_OPTIONAL ()
	Keys used to specify input port requirements. More...

static vtkInformationIntegerKey *	INPUT_IS_REPEATABLE ()

static vtkInformationInformationVectorKey *	INPUT_REQUIRED_FIELDS ()

static vtkInformationStringVectorKey *	INPUT_REQUIRED_DATA_TYPE ()

static vtkInformationInformationVectorKey *	INPUT_ARRAYS_TO_PROCESS ()

static vtkInformationIntegerKey *	INPUT_PORT ()

static vtkInformationIntegerKey *	INPUT_CONNECTION ()

static vtkInformationIntegerKey *	CAN_PRODUCE_SUB_EXTENT ()
	This key tells the executive that a particular output port is capable of producing an arbitrary subextent of the whole extent. More...

static vtkInformationIntegerKey *	CAN_HANDLE_PIECE_REQUEST ()
	Key that tells the pipeline that a particular algorithm can or cannot handle piece request. More...

static void	SetDefaultExecutivePrototype (vtkExecutive *proto)
	If the DefaultExecutivePrototype is set, a copy of it is created in CreateDefaultExecutive() using NewInstance(). More...

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. More...

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes. More...

static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOn ()

static void	GlobalWarningDisplayOff ()

static int	GetGlobalWarningDisplay ()

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. More...

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkDelaunay3D ()

	~vtkDelaunay3D () override

int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector ) override
	This is called by the superclass. More...

int	FindTetra (vtkUnstructuredGrid *Mesh, double x[3], vtkIdType tetId, int depth)

int	InSphere (double x[3], vtkIdType tetraId)

void	InsertTetra (vtkUnstructuredGrid Mesh, vtkPoints pts, vtkIdType tetraId)

vtkIdType	FindEnclosingFaces (double x[3], vtkUnstructuredGrid Mesh, vtkIdList tetras, vtkIdList faces, vtkIncrementalPointLocator Locator)

int	FillInputPortInformation (int, vtkInformation *) override
	Fill the input port information objects for this algorithm. More...

Protected Member Functions inherited from vtkUnstructuredGridAlgorithm
	vtkUnstructuredGridAlgorithm ()

	~vtkUnstructuredGridAlgorithm () override

virtual int	RequestInformation (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)

virtual int	RequestUpdateExtent (vtkInformation , vtkInformationVector , vtkInformationVector )
	This is called by the superclass. More...

int	FillOutputPortInformation (int port, vtkInformation *info) override
	Fill the output port information objects for this algorithm. More...

Protected Member Functions inherited from vtkAlgorithm
	vtkAlgorithm ()

	~vtkAlgorithm () override

virtual void	SetNumberOfInputPorts (int n)
	Set the number of input ports used by the algorithm. More...

virtual void	SetNumberOfOutputPorts (int n)
	Set the number of output ports provided by the algorithm. More...

int	InputPortIndexInRange (int index, const char *action)

int	OutputPortIndexInRange (int index, const char *action)

int	GetInputArrayAssociation (int idx, vtkInformationVector **inputVector)
	Get the assocition of the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...

int	GetInputArrayAssociation (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature. More...

int	GetInputArrayAssociation (int idx, vtkDataObject *input)

vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...

vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)

vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature. More...

vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)

vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input)

vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input, int &association)

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature. More...

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input)

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input, int &association)

vtkInformation *	GetInputArrayFieldInformation (int idx, vtkInformationVector **inputVector)
	This method takes in an index (as specified in SetInputArrayToProcess) and a pipeline information vector. More...

virtual vtkExecutive *	CreateDefaultExecutive ()
	Create a default executive. More...

virtual void	SetErrorCode (unsigned long)
	The error code contains a possible error that occurred while reading or writing the file. More...

void	ReportReferences (vtkGarbageCollector *) override

virtual void	SetNthInputConnection (int port, int index, vtkAlgorithmOutput *input)
	Replace the Nth connection on the given input port. More...

virtual void	SetNumberOfInputConnections (int port, int n)
	Set the number of input connections on the given input port. More...

void	SetInputDataInternal (int port, vtkDataObject *input)
	These methods are used by subclasses to implement methods to set data objects directly as input. More...

void	AddInputDataInternal (int port, vtkDataObject *input)

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. More...

void	InternalReleaseFocus ()

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
double	Alpha

vtkTypeBool	AlphaTets

vtkTypeBool	AlphaTris

vtkTypeBool	AlphaLines

vtkTypeBool	AlphaVerts

double	Tolerance

vtkTypeBool	BoundingTriangulation

double	Offset

int	OutputPointsPrecision

vtkIncrementalPointLocator *	Locator

vtkTetraArray *	TetraArray

int	NumberOfDuplicatePoints

int	NumberOfDegeneracies

int *	References

Protected Attributes inherited from vtkAlgorithm
vtkInformation *	Information

unsigned long	ErrorCode

double	Progress

char *	ProgressText

vtkProgressObserver *	ProgressObserver

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Public Attributes inherited from vtkAlgorithm
vtkTypeBool	AbortExecute

Static Protected Member Functions inherited from vtkAlgorithm
static vtkInformationIntegerKey *	PORT_REQUIREMENTS_FILLED ()

Static Protected Attributes inherited from vtkAlgorithm
static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

create 3D Delaunay triangulation of input points

vtkDelaunay3D is a filter that constructs a 3D Delaunay triangulation from a list of input points. These points may be represented by any dataset of type vtkPointSet and subclasses. The output of the filter is an unstructured grid dataset. Usually the output is a tetrahedral mesh, but if a non-zero alpha distance value is specified (called the "alpha" value), then only tetrahedra, triangles, edges, and vertices laying within the alpha radius are output. In other words, non-zero alpha values may result in arbitrary combinations of tetrahedra, triangles, lines, and vertices. (The notion of alpha value is derived from Edelsbrunner's work on "alpha shapes".) Note that a modification to alpha shapes enables output of combinations of tetrahedra, triangles, lines, and/or verts (see the boolean ivars AlphaTets, AlphaTris, AlphaLines, AlphaVerts).

The 3D Delaunay triangulation is defined as the triangulation that satisfies the Delaunay criterion for n-dimensional simplexes (in this case n=3 and the simplexes are tetrahedra). This criterion states that a circumsphere of each simplex in a triangulation contains only the n+1 defining points of the simplex. (See text for more information.) While in two dimensions this translates into an "optimal" triangulation, this is not true in 3D, since a measurement for optimality in 3D is not agreed on.

Delaunay triangulations are used to build topological structures from unorganized (or unstructured) points. The input to this filter is a list of points specified in 3D. (If you wish to create 2D triangulations see vtkDelaunay2D.) The output is an unstructured grid.

The Delaunay triangulation can be numerically sensitive. To prevent problems, try to avoid injecting points that will result in triangles with bad aspect ratios (1000:1 or greater). In practice this means inserting points that are "widely dispersed", and enables smooth transition of triangle sizes throughout the mesh. (You may even want to add extra points to create a better point distribution.) If numerical problems are present, you will see a warning message to this effect at the end of the triangulation process.

Warning: Points arranged on a regular lattice (termed degenerate cases) can be triangulated in more than one way (at least according to the Delaunay criterion). The choice of triangulation (as implemented by this algorithm) depends on the order of the input points. The first four points will form a tetrahedron; other degenerate points (relative to this initial tetrahedron) will not break it.; Points that are coincident (or nearly so) may be discarded by the algorithm. This is because the Delaunay triangulation requires unique input points. You can control the definition of coincidence with the "Tolerance" instance variable.; The output of the Delaunay triangulation is supposedly a convex hull. In certain cases this implementation may not generate the convex hull. This behavior can be controlled by the Offset instance variable. Offset is a multiplier used to control the size of the initial triangulation. The larger the offset value, the more likely you will generate a convex hull; and the more likely you are to see numerical problems.; The implementation of this algorithm varies from the 2D Delaunay algorithm (i.e., vtkDelaunay2D) in an important way. When points are injected into the triangulation, the search for the enclosing tetrahedron is quite different. In the 3D case, the closest previously inserted point point is found, and then the connected tetrahedra are searched to find the containing one. (In 2D, a "walk" towards the enclosing triangle is performed.) If the triangulation is Delaunay, then an enclosing tetrahedron will be found. However, in degenerate cases an enclosing tetrahedron may not be found and the point will be rejected.

See also: vtkDelaunay2D vtkGaussianSplatter vtkUnstructuredGrid

Definition at line 107 of file vtkDelaunay3D.h.

Member Typedef Documentation

◆ Superclass

typedef vtkUnstructuredGridAlgorithm vtkDelaunay3D::Superclass

Definition at line 110 of file vtkDelaunay3D.h.

Constructor & Destructor Documentation

◆ vtkDelaunay3D()

vtkDelaunay3D::vtkDelaunay3D ( )

protected

◆ ~vtkDelaunay3D()

vtkDelaunay3D::~vtkDelaunay3D ( )

overrideprotected

Member Function Documentation

◆ IsTypeOf()

static vtkTypeBool vtkDelaunay3D::IsTypeOf ( const char * type )

static

◆ IsA()

virtual vtkTypeBool vtkDelaunay3D::IsA ( const char * name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkUnstructuredGridAlgorithm.

◆ SafeDownCast()

static vtkDelaunay3D* vtkDelaunay3D::SafeDownCast ( vtkObjectBase * o )

static

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkDelaunay3D::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkUnstructuredGridAlgorithm.

◆ NewInstance()

vtkDelaunay3D* vtkDelaunay3D::NewInstance ( ) const

◆ PrintSelf()

void vtkDelaunay3D::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkUnstructuredGridAlgorithm.

◆ New()

static vtkDelaunay3D* vtkDelaunay3D::New ( )

static

Construct object with Alpha = 0.0; Tolerance = 0.001; Offset = 2.5; BoundingTriangulation turned off.

◆ SetAlpha()

virtual void vtkDelaunay3D::SetAlpha ( double )

virtual

Specify alpha (or distance) value to control output of this filter.

For a non-zero alpha value, only verts, edges, faces, or tetra contained within the circumsphere (of radius alpha) will be output. Otherwise, only tetrahedra will be output. Note that the flags AlphaTets, AlphaTris, AlphaLines, and AlphaVerts control whether these primitives are output when Alpha is non-zero. (By default all tets, triangles, lines and verts satisfying the alpha shape criterion are output.)

◆ GetAlpha()

virtual double vtkDelaunay3D::GetAlpha ( )

virtual

◆ SetAlphaTets()

virtual void vtkDelaunay3D::SetAlphaTets ( vtkTypeBool )

virtual

Boolean controls whether tetrahedra are output for non-zero alpha values.

◆ GetAlphaTets()

virtual vtkTypeBool vtkDelaunay3D::GetAlphaTets ( )

virtual

◆ AlphaTetsOn()

virtual void vtkDelaunay3D::AlphaTetsOn ( )

virtual

◆ AlphaTetsOff()

virtual void vtkDelaunay3D::AlphaTetsOff ( )

virtual

◆ SetAlphaTris()

virtual void vtkDelaunay3D::SetAlphaTris ( vtkTypeBool )

virtual

Boolean controls whether triangles are output for non-zero alpha values.

◆ GetAlphaTris()

virtual vtkTypeBool vtkDelaunay3D::GetAlphaTris ( )

virtual

◆ AlphaTrisOn()

virtual void vtkDelaunay3D::AlphaTrisOn ( )

virtual

◆ AlphaTrisOff()

virtual void vtkDelaunay3D::AlphaTrisOff ( )

virtual

◆ SetAlphaLines()

virtual void vtkDelaunay3D::SetAlphaLines ( vtkTypeBool )

virtual

Boolean controls whether lines are output for non-zero alpha values.

◆ GetAlphaLines()

virtual vtkTypeBool vtkDelaunay3D::GetAlphaLines ( )

virtual

◆ AlphaLinesOn()

virtual void vtkDelaunay3D::AlphaLinesOn ( )

virtual

◆ AlphaLinesOff()

virtual void vtkDelaunay3D::AlphaLinesOff ( )

virtual

◆ SetAlphaVerts()

virtual void vtkDelaunay3D::SetAlphaVerts ( vtkTypeBool )

virtual

Boolean controls whether vertices are output for non-zero alpha values.

◆ GetAlphaVerts()

virtual vtkTypeBool vtkDelaunay3D::GetAlphaVerts ( )

virtual

◆ AlphaVertsOn()

virtual void vtkDelaunay3D::AlphaVertsOn ( )

virtual

◆ AlphaVertsOff()

virtual void vtkDelaunay3D::AlphaVertsOff ( )

virtual

◆ SetTolerance()

virtual void vtkDelaunay3D::SetTolerance ( double )

virtual

Specify a tolerance to control discarding of closely spaced points.

This tolerance is specified as a fraction of the diagonal length of the bounding box of the points.

◆ GetTolerance()

virtual double vtkDelaunay3D::GetTolerance ( )

virtual

◆ SetOffset()

virtual void vtkDelaunay3D::SetOffset ( double )

virtual

Specify a multiplier to control the size of the initial, bounding Delaunay triangulation.

◆ GetOffset()

virtual double vtkDelaunay3D::GetOffset ( )

virtual

◆ SetBoundingTriangulation()

virtual void vtkDelaunay3D::SetBoundingTriangulation ( vtkTypeBool )

virtual

Boolean controls whether bounding triangulation points (and associated triangles) are included in the output.

(These are introduced as an initial triangulation to begin the triangulation process. This feature is nice for debugging output.)

◆ GetBoundingTriangulation()

virtual vtkTypeBool vtkDelaunay3D::GetBoundingTriangulation ( )

virtual

◆ BoundingTriangulationOn()

virtual void vtkDelaunay3D::BoundingTriangulationOn ( )

virtual

◆ BoundingTriangulationOff()

virtual void vtkDelaunay3D::BoundingTriangulationOff ( )

virtual

◆ SetLocator()

void vtkDelaunay3D::SetLocator ( vtkIncrementalPointLocator * locator )

Set / get a spatial locator for merging points.

By default, an instance of vtkPointLocator is used.

◆ GetLocator()

virtual vtkIncrementalPointLocator* vtkDelaunay3D::GetLocator ( )

virtual

◆ CreateDefaultLocator()

void vtkDelaunay3D::CreateDefaultLocator ( )

Create default locator.

Used to create one when none is specified. The locator is used to eliminate "coincident" points.

◆ InitPointInsertion()

vtkUnstructuredGrid* vtkDelaunay3D::InitPointInsertion	(	double	center[3],
		double	length,
		vtkIdType	numPts,
		vtkPoints *&	pts
	)

This is a helper method used with InsertPoint() to create tetrahedronalizations of points.

Its purpose is construct an initial Delaunay triangulation into which to inject other points. You must specify the center of a cubical bounding box and its length, as well as the number of points to insert. The method returns a pointer to an unstructured grid. Use this pointer to manipulate the mesh as necessary. You must delete (with Delete()) the mesh when done. Note: This initialization method places points forming bounding octahedron at the end of the Mesh's point list. That is, InsertPoint() assumes that you will be inserting points between (0,numPtsToInsert-1).

◆ InsertPoint()

void vtkDelaunay3D::InsertPoint	(	vtkUnstructuredGrid *	Mesh,
		vtkPoints *	points,
		vtkIdType	id,
		double	x[3],
		vtkIdList *	holeTetras
	)

This is a helper method used with InitPointInsertion() to create tetrahedronalizations of points.

Its purpose is to inject point at coordinates specified into tetrahedronalization. The point id is an index into the list of points in the mesh structure. (See vtkDelaunay3D::InitPointInsertion() for more information.) When you have completed inserting points, traverse the mesh structure to extract desired tetrahedra (or tetra faces and edges).The holeTetras id list lists all the tetrahedra that are deleted (invalid) in the mesh structure.

◆ EndPointInsertion()

void vtkDelaunay3D::EndPointInsertion ( )

Invoke this method after all points have been inserted.

The purpose of the method is to clean up internal data structures. Note that the (vtkUnstructuredGrid *)Mesh returned from InitPointInsertion() is NOT deleted, you still are responsible for cleaning that up.

◆ GetMTime()

vtkMTimeType vtkDelaunay3D::GetMTime ( )

overridevirtual

Return the MTime also considering the locator.

Reimplemented from vtkObject.

◆ SetOutputPointsPrecision()

virtual void vtkDelaunay3D::SetOutputPointsPrecision ( int )

virtual

Set/get the desired precision for the output types.

See the documentation for the vtkAlgorithm::DesiredOutputPrecision enum for an explanation of the available precision settings.

◆ GetOutputPointsPrecision()

virtual int vtkDelaunay3D::GetOutputPointsPrecision ( )

virtual

◆ RequestData()

int vtkDelaunay3D::RequestData	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)

overrideprotectedvirtual

This is called by the superclass.

This is the method you should override.

Reimplemented from vtkUnstructuredGridAlgorithm.

◆ FindTetra()

int vtkDelaunay3D::FindTetra	(	vtkUnstructuredGrid *	Mesh,
		double	x[3],
		vtkIdType	tetId,
		int	depth
	)

protected

◆ InSphere()

int vtkDelaunay3D::InSphere	(	double	x[3],
		vtkIdType	tetraId
	)

protected

◆ InsertTetra()

void vtkDelaunay3D::InsertTetra	(	vtkUnstructuredGrid *	Mesh,
		vtkPoints *	pts,
		vtkIdType	tetraId
	)

protected

◆ FindEnclosingFaces()

vtkIdType vtkDelaunay3D::FindEnclosingFaces	(	double	x[3],
		vtkUnstructuredGrid *	Mesh,
		vtkIdList *	tetras,
		vtkIdList *	faces,
		vtkIncrementalPointLocator *	Locator
	)

protected

◆ FillInputPortInformation()

int vtkDelaunay3D::FillInputPortInformation	(	int	port,
		vtkInformation *	info
	)

overrideprotectedvirtual

Fill the input port information objects for this algorithm.

This is invoked by the first call to GetInputPortInformation for each port so subclasses can specify what they can handle.

Reimplemented from vtkUnstructuredGridAlgorithm.

Member Data Documentation

◆ Alpha

double vtkDelaunay3D::Alpha

protected

Definition at line 272 of file vtkDelaunay3D.h.

◆ AlphaTets

vtkTypeBool vtkDelaunay3D::AlphaTets

protected

Definition at line 273 of file vtkDelaunay3D.h.

◆ AlphaTris

vtkTypeBool vtkDelaunay3D::AlphaTris

protected

Definition at line 274 of file vtkDelaunay3D.h.

◆ AlphaLines

vtkTypeBool vtkDelaunay3D::AlphaLines

protected

Definition at line 275 of file vtkDelaunay3D.h.

◆ AlphaVerts

vtkTypeBool vtkDelaunay3D::AlphaVerts

protected

Definition at line 276 of file vtkDelaunay3D.h.

◆ Tolerance

double vtkDelaunay3D::Tolerance

protected

Definition at line 277 of file vtkDelaunay3D.h.

◆ BoundingTriangulation

vtkTypeBool vtkDelaunay3D::BoundingTriangulation

protected

Definition at line 278 of file vtkDelaunay3D.h.

◆ Offset

double vtkDelaunay3D::Offset

protected

Definition at line 279 of file vtkDelaunay3D.h.

◆ OutputPointsPrecision

int vtkDelaunay3D::OutputPointsPrecision

protected

Definition at line 280 of file vtkDelaunay3D.h.

◆ Locator

vtkIncrementalPointLocator* vtkDelaunay3D::Locator

protected

Definition at line 282 of file vtkDelaunay3D.h.

◆ TetraArray

vtkTetraArray* vtkDelaunay3D::TetraArray

protected

Definition at line 284 of file vtkDelaunay3D.h.

◆ NumberOfDuplicatePoints

int vtkDelaunay3D::NumberOfDuplicatePoints

protected

Definition at line 289 of file vtkDelaunay3D.h.

◆ NumberOfDegeneracies

int vtkDelaunay3D::NumberOfDegeneracies

protected

Definition at line 290 of file vtkDelaunay3D.h.

◆ References

int* vtkDelaunay3D::References

protected

Definition at line 293 of file vtkDelaunay3D.h.

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

dox/Filters/Core/vtkDelaunay3D.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Superclass

Constructor & Destructor Documentation

◆ vtkDelaunay3D()

◆ ~vtkDelaunay3D()

Member Function Documentation

◆ IsTypeOf()

◆ IsA()

◆ SafeDownCast()

◆ NewInstanceInternal()

◆ NewInstance()

◆ PrintSelf()

◆ New()

◆ SetAlpha()

◆ GetAlpha()

◆ SetAlphaTets()

◆ GetAlphaTets()

◆ AlphaTetsOn()

◆ AlphaTetsOff()

◆ SetAlphaTris()

◆ GetAlphaTris()

◆ AlphaTrisOn()

◆ AlphaTrisOff()

◆ SetAlphaLines()

◆ GetAlphaLines()

◆ AlphaLinesOn()

◆ AlphaLinesOff()

◆ SetAlphaVerts()

◆ GetAlphaVerts()

◆ AlphaVertsOn()

◆ AlphaVertsOff()

◆ SetTolerance()

◆ GetTolerance()

◆ SetOffset()

◆ GetOffset()

◆ SetBoundingTriangulation()

◆ GetBoundingTriangulation()

◆ BoundingTriangulationOn()

◆ BoundingTriangulationOff()

◆ SetLocator()

◆ GetLocator()

◆ CreateDefaultLocator()

◆ InitPointInsertion()

◆ InsertPoint()

◆ EndPointInsertion()

◆ GetMTime()

◆ SetOutputPointsPrecision()

◆ GetOutputPointsPrecision()

◆ RequestData()

◆ FindTetra()

◆ InSphere()

◆ InsertTetra()

◆ FindEnclosingFaces()

◆ FillInputPortInformation()

Member Data Documentation

◆ Alpha

◆ AlphaTets

◆ AlphaTris

◆ AlphaLines

◆ AlphaVerts

◆ Tolerance

◆ BoundingTriangulation

◆ Offset

◆ OutputPointsPrecision

◆ Locator

◆ TetraArray

◆ NumberOfDuplicatePoints

◆ NumberOfDegeneracies

◆ References