vtkPointDensityFilter Class Reference

produce density field from input point cloud More...

#include <vtkPointDensityFilter.h>

Inheritance diagram for vtkPointDensityFilter:

Collaboration diagram for vtkPointDensityFilter:

Public Types
enum	FunctionClass { ZERO = 0 , NON_ZERO = 1 }
	This enum is used to classify the behavior of the function gradient. More...
Public Types inherited from vtkImageAlgorithm
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
void	SetSampleDimensions (int i, int j, int k)
	Set / get the dimensions of the sampling volume.
void	SetSampleDimensions (int dim[3])
	Set / get the dimensions of the sampling volume.
virtual int *	GetSampleDimensions ()
	Set / get the dimensions of the sampling volume.
virtual void	GetSampleDimensions (int data[3])
	Set / get the dimensions of the sampling volume.
virtual void	SetModelBounds (double, double, double, double, double, double)
	Set / get the (xmin,xmax, ymin,ymax, zmin,zmax) bounding box in which the sampling is performed.
virtual void	SetModelBounds (double[6])
	Set / get the (xmin,xmax, ymin,ymax, zmin,zmax) bounding box in which the sampling is performed.
virtual double *	GetModelBounds ()
	Set / get the (xmin,xmax, ymin,ymax, zmin,zmax) bounding box in which the sampling is performed.
virtual void	GetModelBounds (double data[6])
	Set / get the (xmin,xmax, ymin,ymax, zmin,zmax) bounding box in which the sampling is performed.
virtual void	SetAdjustDistance (double)
	Set / get the relative amount to pad the model bounds if automatic computation is performed.
virtual double	GetAdjustDistance ()
	Set / get the relative amount to pad the model bounds if automatic computation is performed.
virtual void	SetDensityEstimate (int)
	Specify the method to estimate point density.
virtual int	GetDensityEstimate ()
	Specify the method to estimate point density.
void	SetDensityEstimateToFixedRadius ()
	Specify the method to estimate point density.
void	SetDensityEstimateToRelativeRadius ()
	Specify the method to estimate point density.
const char *	GetDensityEstimateAsString ()
	Specify the method to estimate point density.
virtual void	SetDensityForm (int)
	Specify the form by which the density is expressed.
virtual int	GetDensityForm ()
	Specify the form by which the density is expressed.
void	SetDensityFormToVolumeNormalized ()
	Specify the form by which the density is expressed.
void	SetDensityFormToNumberOfPoints ()
	Specify the form by which the density is expressed.
const char *	GetDensityFormAsString ()
	Specify the form by which the density is expressed.
virtual void	SetRadius (double)
	Set / get the radius variable defining the local sphere used to estimate the density function.
virtual double	GetRadius ()
	Set / get the radius variable defining the local sphere used to estimate the density function.
virtual void	SetRelativeRadius (double)
	Set / get the relative radius factor defining the local sphere used to estimate the density function.
virtual double	GetRelativeRadius ()
	Set / get the relative radius factor defining the local sphere used to estimate the density function.
virtual void	SetScalarWeighting (bool)
	Turn on/off the weighting of point density by a scalar array.
virtual bool	GetScalarWeighting ()
	Turn on/off the weighting of point density by a scalar array.
virtual void	ScalarWeightingOn ()
	Turn on/off the weighting of point density by a scalar array.
virtual void	ScalarWeightingOff ()
	Turn on/off the weighting of point density by a scalar array.
virtual void	SetComputeGradient (bool)
	Turn on/off the generation of the gradient vector, gradient magnitude scalar, and function classification scalar.
virtual bool	GetComputeGradient ()
	Turn on/off the generation of the gradient vector, gradient magnitude scalar, and function classification scalar.
virtual void	ComputeGradientOn ()
	Turn on/off the generation of the gradient vector, gradient magnitude scalar, and function classification scalar.
virtual void	ComputeGradientOff ()
	Turn on/off the generation of the gradient vector, gradient magnitude scalar, and function classification scalar.
void	SetLocator (vtkAbstractPointLocator *locator)
	Specify a point locator.
virtual vtkAbstractPointLocator *	GetLocator ()
	Specify a point locator.
Public Member Functions inherited from vtkImageAlgorithm
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.
vtkImageAlgorithm *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.
vtkTypeBool	ProcessRequest (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
	Process a request from the executive.
vtkImageData *	GetOutput ()
	Get the output data object for a port on this algorithm.
vtkImageData *	GetOutput (int)
	Get the output data object for a port on this algorithm.
virtual void	SetOutput (vtkDataObject *d)
	Get the output data object for a port on this algorithm.
void	SetInputData (vtkDataObject *)
	Assign a data object as input.
void	SetInputData (int, vtkDataObject *)
	Assign a data object as input.
vtkDataObject *	GetInput (int port)
	Get a data object for one of the input port connections.
vtkDataObject *	GetInput ()
	Get a data object for one of the input port connections.
vtkImageData *	GetImageDataInput (int port)
	Get a data object for one of the input port connections.
virtual void	AddInputData (vtkDataObject *)
	Assign a data object as input.
virtual void	AddInputData (int, vtkDataObject *)
	Assign a data object as input.
Public Member Functions inherited from vtkAlgorithm
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.
vtkAlgorithm *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.
vtkTypeBool	HasExecutive ()
	Check whether this algorithm has an assigned executive.
vtkExecutive *	GetExecutive ()
	Get this algorithm's executive.
virtual void	SetExecutive (vtkExecutive *executive)
	Set this algorithm's executive.
virtual vtkTypeBool	ProcessRequest (vtkInformation *request, vtkInformationVector **inInfo, vtkInformationVector *outInfo)
	Upstream/Downstream requests form the generalized interface through which executives invoke a algorithm's functionality.
vtkTypeBool	ProcessRequest (vtkInformation *request, vtkCollection *inInfo, vtkInformationVector *outInfo)
	Version of ProcessRequest() that is wrapped.
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.
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.
vtkInformation *	GetInputPortInformation (int port)
	Get the information object associated with an input port.
vtkInformation *	GetOutputPortInformation (int port)
	Get the information object associated with an output port.
int	GetNumberOfInputPorts ()
	Get the number of input ports used by the algorithm.
int	GetNumberOfOutputPorts ()
	Get the number of output ports provided by the algorithm.
void	SetAbortExecuteAndUpdateTime ()
	Set AbortExecute Flag and update LastAbortTime.
void	UpdateProgress (double amount)
	Update the progress of the process object.
bool	CheckAbort ()
	Checks to see if this filter should abort.
vtkInformation *	GetInputArrayInformation (int idx)
	Get the info object for the specified input array to this algorithm.
void	RemoveAllInputs ()
	Remove all the input data.
vtkDataObject *	GetOutputDataObject (int port)
	Get the data object that will contain the algorithm output for the given port.
vtkDataObject *	GetInputDataObject (int port, int connection)
	Get the data object that will contain the algorithm input for the given port and given connection.
virtual void	RemoveInputConnection (int port, vtkAlgorithmOutput *input)
	Remove a connection from the given input port index.
virtual void	RemoveInputConnection (int port, int idx)
	Remove a connection given by index idx.
virtual void	RemoveAllInputConnections (int port)
	Removes all input connections.
virtual void	SetInputDataObject (int port, vtkDataObject *data)
	Sets the data-object as an input on the given port index.
virtual void	SetInputDataObject (vtkDataObject *data)
virtual void	AddInputDataObject (int port, vtkDataObject *data)
	Add the data-object as an input to this given port.
virtual void	AddInputDataObject (vtkDataObject *data)
vtkAlgorithmOutput *	GetOutputPort (int index)
	Get a proxy object corresponding to the given output port of this algorithm.
vtkAlgorithmOutput *	GetOutputPort ()
int	GetNumberOfInputConnections (int port)
	Get the number of inputs currently connected to a port.
int	GetTotalNumberOfInputConnections ()
	Get the total number of inputs for this algorithm.
vtkAlgorithmOutput *	GetInputConnection (int port, int index)
	Get the algorithm output port connected to an input port.
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.
vtkAlgorithm *	GetInputAlgorithm (int port, int index)
	Returns the algorithm connected to a port-index pair.
vtkAlgorithm *	GetInputAlgorithm ()
	Equivalent to GetInputAlgorithm(0, 0).
vtkExecutive *	GetInputExecutive (int port, int index)
	Returns the executive associated with a particular input connection.
vtkExecutive *	GetInputExecutive ()
	Equivalent to GetInputExecutive(0, 0)
vtkInformation *	GetInputInformation (int port, int index)
	Return the information object that is associated with a particular input connection.
vtkInformation *	GetInputInformation ()
	Equivalent to GetInputInformation(0, 0)
vtkInformation *	GetOutputInformation (int port)
	Return the information object that is associated with a particular output port.
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).
virtual vtkTypeBool	Update (vtkInformation *requests)
	Convenience method to update an algorithm after passing requests to its first output port.
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.
virtual VTK_UNBLOCKTHREADS int	UpdateExtent (const int extents[6])
	Convenience method to update an algorithm after passing requests to its first output port.
virtual VTK_UNBLOCKTHREADS 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.
virtual VTK_UNBLOCKTHREADS void	UpdateInformation ()
	Bring the algorithm's information up-to-date.
virtual void	UpdateDataObject ()
	Create output object(s).
virtual void	PropagateUpdateExtent ()
	Propagate meta-data upstream.
virtual VTK_UNBLOCKTHREADS void	UpdateWholeExtent ()
	Bring this algorithm's outputs up-to-date.
void	ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
	Convenience routine to convert from a linear ordering of input connections to a port/connection pair.
void	RemoveNoPriorTemporalAccessInformationKey ()
	Removes any information key vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS() to all output ports of this vtkAlgorithm.
virtual vtkInformation *	GetInformation ()
	Set/Get the information object associated with this algorithm.
virtual void	SetInformation (vtkInformation *)
	Set/Get the information object associated with this algorithm.
bool	UsesGarbageCollector () const override
	Participate in garbage collection.
virtual void	SetAbortExecute (vtkTypeBool)
	Set/Get the AbortExecute flag for the process object.
virtual vtkTypeBool	GetAbortExecute ()
	Set/Get the AbortExecute flag for the process object.
virtual void	AbortExecuteOn ()
	Set/Get the AbortExecute flag for the process object.
virtual void	AbortExecuteOff ()
	Set/Get the AbortExecute flag for the process object.
virtual double	GetProgress ()
	Get the execution progress of a process object.
void	SetContainerAlgorithm (vtkAlgorithm *containerAlg)
	Set/get a Container algorithm for this algorithm.
vtkAlgorithm *	GetContainerAlgorithm ()
	Set/get a Container algorithm for this algorithm.
virtual void	SetAbortOutput (bool)
	Set/Get an internal variable used to communicate between the algorithm and executive.
virtual bool	GetAbortOutput ()
	Set/Get an internal variable used to communicate between the algorithm and executive.
void	SetProgressShiftScale (double shift, double scale)
	Specify the shift and scale values to use to apply to the progress amount when UpdateProgress is called.
virtual double	GetProgressShift ()
	Specify the shift and scale values to use to apply to the progress amount when UpdateProgress is called.
virtual double	GetProgressScale ()
	Specify the shift and scale values to use to apply to the progress amount when UpdateProgress is called.
void	SetProgressText (const char *ptext)
	Set the current text message associated with the progress state.
virtual char *	GetProgressText ()
	Set the current text message associated with the progress state.
virtual unsigned long	GetErrorCode ()
	The error code contains a possible error that occurred while reading or writing the file.
void	SetInputArrayToProcess (const char *name, int fieldAssociation)
	Set the input data arrays that this algorithm will process.
virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, const char *name)
	Set the input data arrays that this algorithm will process.
virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, int fieldAttributeType)
	Set the input data arrays that this algorithm will process.
virtual void	SetInputArrayToProcess (int idx, vtkInformation *info)
	Set the input data arrays that this algorithm will process.
virtual void	SetInputArrayToProcess (int idx, int port, int connection, const char *fieldAssociation, const char *attributeTypeorName)
	Set the input data arrays that this algorithm will process.
virtual void	SetInputConnection (int port, vtkAlgorithmOutput *input)
	Set the connection for the given input port index.
virtual void	SetInputConnection (vtkAlgorithmOutput *input)
	Set the connection for the given input port index.
virtual void	AddInputConnection (int port, vtkAlgorithmOutput *input)
	Add a connection to the given input port index.
virtual void	AddInputConnection (vtkAlgorithmOutput *input)
	Add a connection to the given input port index.
virtual VTK_UNBLOCKTHREADS void	Update (int port)
	Bring this algorithm's outputs up-to-date.
virtual VTK_UNBLOCKTHREADS void	Update ()
	Bring this algorithm's outputs up-to-date.
virtual void	SetReleaseDataFlag (vtkTypeBool)
	Turn release data flag on or off for all output ports.
virtual vtkTypeBool	GetReleaseDataFlag ()
	Turn release data flag on or off for all output ports.
void	ReleaseDataFlagOn ()
	Turn release data flag on or off for all output ports.
void	ReleaseDataFlagOff ()
	Turn release data flag on or off for all output ports.
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.
int	UpdateExtentIsEmpty (vtkInformation *pinfo, int extentType)
	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.
int *	GetUpdateExtent ()
	These functions return the update extent for output ports that use 3D extents.
int *	GetUpdateExtent (int port)
	These functions return the update extent for output ports that use 3D extents.
void	GetUpdateExtent (int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
	These functions return the update extent for output ports that use 3D extents.
void	GetUpdateExtent (int port, int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
	These functions return the update extent for output ports that use 3D extents.
void	GetUpdateExtent (int extent[6])
	These functions return the update extent for output ports that use 3D extents.
void	GetUpdateExtent (int port, int extent[6])
	These functions return the update extent for output ports that use 3D extents.
int	GetUpdatePiece ()
	These functions return the update extent for output ports that use piece extents.
int	GetUpdatePiece (int port)
	These functions return the update extent for output ports that use piece extents.
int	GetUpdateNumberOfPieces ()
	These functions return the update extent for output ports that use piece extents.
int	GetUpdateNumberOfPieces (int port)
	These functions return the update extent for output ports that use piece extents.
int	GetUpdateGhostLevel ()
	These functions return the update extent for output ports that use piece extents.
int	GetUpdateGhostLevel (int port)
	These functions return the update extent for output ports that use piece extents.
void	SetProgressObserver (vtkProgressObserver *)
	If an ProgressObserver is set, the algorithm will report progress through it rather than directly.
virtual vtkProgressObserver *	GetProgressObserver ()
	If an ProgressObserver is set, the algorithm will report progress through it rather than directly.
void	SetNoPriorTemporalAccessInformationKey (int key)
	Set to all output ports of this algorithm the information key vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS().
void	SetNoPriorTemporalAccessInformationKey ()
	Set to all output ports of this algorithm the information key vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS().
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)
vtkTypeBool	InvokeEvent (unsigned long event)
vtkTypeBool	InvokeEvent (const char *event)
std::string	GetObjectDescription () const override
	The object description printed in messages and PrintSelf output.
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.
vtkTypeBool	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
vtkTypeBool	InvokeEvent (const char *event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
virtual void	SetObjectName (const std::string &objectName)
	Set/get the name of this object for reporting purposes.
virtual std::string	GetObjectName () const
	Set/get the name of this object for reporting purposes.
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.
virtual std::string	GetObjectDescription () const
	The object description printed in messages and PrintSelf output.
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.
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 Member Functions
	vtkPointDensityFilter ()
	~vtkPointDensityFilter () override
int	FillInputPortInformation (int port, vtkInformation *info) override
	These method should be reimplemented by subclasses that have more than a single input or single output.
int	RequestInformation (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
	Subclasses can reimplement this method to collect information from their inputs and set information for their outputs.
int	RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
	This is called in response to a REQUEST_DATA request from the executive.
void	ComputeModelBounds (vtkDataSet *input, vtkImageData *output, vtkInformation *outInfo)
Protected Member Functions inherited from vtkImageAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkImageAlgorithm ()
	~vtkImageAlgorithm () override
virtual int	RequestInformation (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
	Subclasses can reimplement this method to collect information from their inputs and set information for their outputs.
virtual int	RequestUpdateExtent (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
	Subclasses can reimplement this method to translate the update extent requests from each output port into update extent requests for the input connections.
virtual int	RequestUpdateTime (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
virtual void	CopyInputArrayAttributesToOutput (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
	Convenience method to copy the scalar type and number of components from the input data to the output data.
virtual int	RequestData (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
	This is called in response to a REQUEST_DATA request from the executive.
virtual void	ExecuteDataWithInformation (vtkDataObject *output, vtkInformation *outInfo)
	This is a convenience method that is implemented in many subclasses instead of RequestData.
virtual void	CopyAttributeData (vtkImageData *in, vtkImageData *out, vtkInformationVector **inputVector)
	Copy the other point and cell data.
virtual void	ExecuteData (vtkDataObject *output)
	This method is the old style execute method, provided for the sake of backwards compatibility with older filters and readers.
virtual void	Execute ()
	This method is the old style execute method, provided for the sake of backwards compatibility with older filters and readers.
virtual void	AllocateOutputData (vtkImageData *out, vtkInformation *outInfo, int *uExtent)
	Allocate the output data.
virtual vtkImageData *	AllocateOutputData (vtkDataObject *out, vtkInformation *outInfo)
	Allocate the output data.
int	FillOutputPortInformation (int port, vtkInformation *info) override
	These method should be reimplemented by subclasses that have more than a single input or single output.
Protected Member Functions inherited from vtkAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkAlgorithm ()
	~vtkAlgorithm () override
bool	CheckUpstreamAbort ()
	Checks to see if an upstream filter has been aborted.
virtual int	FillInputPortInformation (int port, vtkInformation *info)
	Fill the input port information objects for this algorithm.
virtual int	FillOutputPortInformation (int port, vtkInformation *info)
	Fill the output port information objects for this algorithm.
virtual void	SetNumberOfInputPorts (int n)
	Set the number of input ports used by the algorithm.
virtual void	SetNumberOfOutputPorts (int n)
	Set the number of output ports provided by the algorithm.
int	InputPortIndexInRange (int index, const char *action)
int	OutputPortIndexInRange (int index, const char *action)
int	GetInputArrayAssociation (int idx, vtkInformationVector **inputVector)
	Get the association of the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass.
vtkInformation *	GetInputArrayFieldInformation (int idx, vtkInformationVector **inputVector)
	This method takes in an index (as specified in SetInputArrayToProcess) and a pipeline information vector.
virtual vtkExecutive *	CreateDefaultExecutive ()
	Create a default executive.
void	ReportReferences (vtkGarbageCollector *) override
virtual void	SetNthInputConnection (int port, int index, vtkAlgorithmOutput *input)
	Replace the Nth connection on the given input port.
virtual void	SetNumberOfInputConnections (int port, int n)
	Set the number of input connections on the given input port.
void	SetInputDataInternal (int port, vtkDataObject *input)
	These methods are used by subclasses to implement methods to set data objects directly as input.
void	AddInputDataInternal (int port, vtkDataObject *input)
int	GetInputArrayAssociation (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature.
int	GetInputArrayAssociation (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature.
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.
vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass.
vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature.
vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
	Filters that have multiple connections on one port can use this signature.
vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature.
vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input, int &association)
	Filters that have multiple connections on one port can use this signature.
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.
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass.
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature.
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
	Filters that have multiple connections on one port can use this signature.
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature.
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input, int &association)
	Filters that have multiple connections on one port can use this signature.
virtual void	SetErrorCode (unsigned long)
	The error code contains a possible error that occurred while reading or writing the file.
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 *)
virtual void	ObjectFinalize ()
	vtkObjectBase (const vtkObjectBase &)
void	operator= (const vtkObjectBase &)

Protected Attributes
int	SampleDimensions [3]
double	ModelBounds [6]
double	AdjustDistance
double	Origin [3]
double	Spacing [3]
int	DensityEstimate
int	DensityForm
double	RelativeRadius
double	Radius
bool	ScalarWeighting
bool	ComputeGradient
vtkAbstractPointLocator *	Locator
Protected Attributes inherited from vtkAlgorithm
vtkTimeStamp	LastAbortCheckTime
vtkInformation *	Information
double	Progress
char *	ProgressText
vtkProgressObserver *	ProgressObserver
unsigned long	ErrorCode
	The error code contains a possible error that occurred while reading or writing the file.
Protected Attributes inherited from vtkObject
bool	Debug
vtkTimeStamp	MTime
vtkSubjectHelper *	SubjectHelper
std::string	ObjectName
Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount
vtkWeakPointerBase **	WeakPointers
typedef vtkImageAlgorithm	Superclass
	Standard methods for instantiating, obtaining type information, and printing information.
static vtkPointDensityFilter *	New ()
	Standard methods for instantiating, obtaining type information, and printing information.
static vtkTypeBool	IsTypeOf (const char *type)
	Standard methods for instantiating, obtaining type information, and printing information.
static vtkPointDensityFilter *	SafeDownCast (vtkObjectBase *o)
	Standard methods for instantiating, obtaining type information, and printing information.
virtual vtkTypeBool	IsA (const char *type)
	Standard methods for instantiating, obtaining type information, and printing information.
vtkPointDensityFilter *	NewInstance () const
	Standard methods for instantiating, obtaining type information, and printing information.
void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard methods for instantiating, obtaining type information, and printing information.
virtual vtkObjectBase *	NewInstanceInternal () const
	Standard methods for instantiating, obtaining type information, and printing information.

Additional Inherited Members
Static Public Member Functions inherited from vtkImageAlgorithm
static vtkTypeBool	IsTypeOf (const char *type)
static vtkImageAlgorithm *	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.
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.
static vtkInformationIntegerKey *	CAN_HANDLE_PIECE_REQUEST ()
	Key that tells the pipeline that a particular algorithm can or cannot handle piece request.
static vtkInformationIntegerKey *	ABORTED ()
static void	SetDefaultExecutivePrototype (vtkExecutive *proto)
	If the DefaultExecutivePrototype is set, a copy of it is created in CreateDefaultExecutive() using NewInstance().
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 (vtkTypeBool 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 vtkTypeBool	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.
Public Attributes inherited from vtkAlgorithm
std::atomic< vtkTypeBool >	AbortExecute
Static Protected Member Functions inherited from vtkAlgorithm
static vtkInformationIntegerKey *	PORT_REQUIREMENTS_FILLED ()
Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()
static vtkReallocingFunction	GetCurrentReallocFunction ()
static vtkFreeingFunction	GetCurrentFreeFunction ()
static vtkFreeingFunction	GetAlternateFreeFunction ()
Static Protected Attributes inherited from vtkAlgorithm
static vtkTimeStamp	LastAbortTime
static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

produce density field from input point cloud

vtkPointDensityFilter is a filter that generates a density field on a volume from a point cloud. Basically the density is computed as number of points in a local neighborhood per unit volume; or optionally, the number of points in a local neighborhood surrounding each voxel. The local neighborhood is specified as a radius around each sample position (i.e., each voxel) which can be of fixed value; or the radius can be relative to the voxel size. The density computation may be further weighted by a scalar value which is simply multiplied by each point's presumed density of 1.0.

To use this filter, specify an input of type vtkPointSet (i.e., has an explicit representation of points). Optionally a scalar weighting function can be provided (part of the input to the filter). Then specify how the local spherical neighborhood is to be defined, either by a fixed radius or a radius relative to the voxel size. Finally, specify how the density is specified, either as a points/volume, or as number of points. (The weighting scalar array will affect both of these results if provided and enabled.)

An optional capability of the filter is to compute the gradients of the resulting density function (a 3-component vector), which also includes the gradient magnitude (single component scalar) and classification (regions of zero function, a scalar with single unsigned char value per voxel).

Warning

A point locator is used to speed up searches. By default a fast vtkStaticPointLocator is used; however the user may specify an alternative locator. In some situations adaptive locators may run faster depending on the relative variation in point cloud density.

Note that the volume calculation can be affected by the boundary. The local spherical neighborhood around a "near volume boundary" voxel may extend beyond the volume extent, meaning that density computation may be reduced. To counter this effect, the volume may be increased in size and/or resolution so that the point cloud fits well within the volume.

While this class is very similar to many other of VTK's the point splatting and interpolation classes, the algorithm density computation is specialized to generate the density computation over a volume, does not require (scalar weighting) data attributes to run, and does not require multiple inputs. As an interesting side note: using the vtkPointInterpolation class with a vtkLinearKernel, a (scalar) weighting point attribute, a point cloud source, and an input volume produces the same result as this filter does (assuming that the input volume is the same).

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.

See also

vtkCheckerboardSplatter vtkShepardMethod vtkGaussianSplatter vtkPointInterpolator vtkSPHInterpolator

Tests:

vtkPointDensityFilter (Tests)

Definition at line 83 of file vtkPointDensityFilter.h.

Member Typedef Documentation

Superclass

typedef vtkImageAlgorithm vtkPointDensityFilter::Superclass

Standard methods for instantiating, obtaining type information, and printing information.

Definition at line 92 of file vtkPointDensityFilter.h.

Member Enumeration Documentation

FunctionClass

enum vtkPointDensityFilter::FunctionClass

This enum is used to classify the behavior of the function gradient.

Regions where all density values used in the calculation of the gradient are zero are referred to as ZERO regions. Otherwise NON_ZERO. This can be used to differentiate between regions where data is available and where it is not.

Enumerator
ZERO
NON_ZERO

Definition at line 224 of file vtkPointDensityFilter.h.

Constructor & Destructor Documentation

vtkPointDensityFilter()

vtkPointDensityFilter::vtkPointDensityFilter ( )

protected

~vtkPointDensityFilter()

vtkPointDensityFilter::~vtkPointDensityFilter ( )

overrideprotected

Member Function Documentation

New()

static vtkPointDensityFilter * vtkPointDensityFilter::New ( )

static

Standard methods for instantiating, obtaining type information, and printing information.

IsTypeOf()

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

static

Standard methods for instantiating, obtaining type information, and printing information.

IsA()

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

virtual

Standard methods for instantiating, obtaining type information, and printing information.

Reimplemented from vtkImageAlgorithm.

SafeDownCast()

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

static

Standard methods for instantiating, obtaining type information, and printing information.

NewInstanceInternal()

virtual vtkObjectBase * vtkPointDensityFilter::NewInstanceInternal ( ) const

protectedvirtual

Standard methods for instantiating, obtaining type information, and printing information.

Reimplemented from vtkImageAlgorithm.

NewInstance()

vtkPointDensityFilter * vtkPointDensityFilter::NewInstance

(

)

const

Standard methods for instantiating, obtaining type information, and printing information.

PrintSelf()

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

overridevirtual

Standard methods for instantiating, obtaining type information, and printing information.

Reimplemented from vtkImageAlgorithm.

SetSampleDimensions() [1/2]

void vtkPointDensityFilter::SetSampleDimensions	(	int	i,
		int	j,
		int	k
	)

Set / get the dimensions of the sampling volume.

Higher values generally produce better results but may be much slower. Note however that too high a resolution can generate excessive noise; too low and data can be excessively smoothed.

SetSampleDimensions() [2/2]

void vtkPointDensityFilter::SetSampleDimensions

(

int

dim[3]

)

Set / get the dimensions of the sampling volume.

Higher values generally produce better results but may be much slower. Note however that too high a resolution can generate excessive noise; too low and data can be excessively smoothed.

GetSampleDimensions() [1/2]

virtual int * vtkPointDensityFilter::GetSampleDimensions ( )

virtual

Set / get the dimensions of the sampling volume.

Higher values generally produce better results but may be much slower. Note however that too high a resolution can generate excessive noise; too low and data can be excessively smoothed.

GetSampleDimensions() [2/2]

virtual void vtkPointDensityFilter::GetSampleDimensions ( int  data[3] )

virtual

Set / get the dimensions of the sampling volume.

Higher values generally produce better results but may be much slower. Note however that too high a resolution can generate excessive noise; too low and data can be excessively smoothed.

SetModelBounds() [1/2]

virtual void vtkPointDensityFilter::SetModelBounds ( double  , double  , double  , double  , double  , double    )

virtual

Set / get the (xmin,xmax, ymin,ymax, zmin,zmax) bounding box in which the sampling is performed.

If any of the (min,max) bounds values are min >= max, then the bounds will be computed automatically from the input data. Otherwise, the user-specified bounds will be used.

SetModelBounds() [2/2]

virtual void vtkPointDensityFilter::SetModelBounds ( double  [6] )

virtual

Set / get the (xmin,xmax, ymin,ymax, zmin,zmax) bounding box in which the sampling is performed.

If any of the (min,max) bounds values are min >= max, then the bounds will be computed automatically from the input data. Otherwise, the user-specified bounds will be used.

GetModelBounds() [1/2]

virtual double * vtkPointDensityFilter::GetModelBounds ( )

virtual

Set / get the (xmin,xmax, ymin,ymax, zmin,zmax) bounding box in which the sampling is performed.

If any of the (min,max) bounds values are min >= max, then the bounds will be computed automatically from the input data. Otherwise, the user-specified bounds will be used.

GetModelBounds() [2/2]

virtual void vtkPointDensityFilter::GetModelBounds ( double  data[6] )

virtual

Set / get the (xmin,xmax, ymin,ymax, zmin,zmax) bounding box in which the sampling is performed.

If any of the (min,max) bounds values are min >= max, then the bounds will be computed automatically from the input data. Otherwise, the user-specified bounds will be used.

SetAdjustDistance()

virtual void vtkPointDensityFilter::SetAdjustDistance ( double  )

virtual

Set / get the relative amount to pad the model bounds if automatic computation is performed.

The padding is the fraction to scale the model bounds in each of the x-y-z directions. By default the padding is 0.10 (i.e., 10% larger in each direction).

GetAdjustDistance()

virtual double vtkPointDensityFilter::GetAdjustDistance ( )

virtual

Set / get the relative amount to pad the model bounds if automatic computation is performed.

The padding is the fraction to scale the model bounds in each of the x-y-z directions. By default the padding is 0.10 (i.e., 10% larger in each direction).

SetDensityEstimate()

virtual void vtkPointDensityFilter::SetDensityEstimate ( int  )

virtual

Specify the method to estimate point density.

The density can be calculated using a fixed sphere radius; or a sphere radius that is relative to voxel size.

GetDensityEstimate()

virtual int vtkPointDensityFilter::GetDensityEstimate ( )

virtual

Specify the method to estimate point density.

The density can be calculated using a fixed sphere radius; or a sphere radius that is relative to voxel size.

SetDensityEstimateToFixedRadius()

void vtkPointDensityFilter::SetDensityEstimateToFixedRadius ( )

inline

Specify the method to estimate point density.

The density can be calculated using a fixed sphere radius; or a sphere radius that is relative to voxel size.

Definition at line 139 of file vtkPointDensityFilter.h.

SetDensityEstimateToRelativeRadius()

void vtkPointDensityFilter::SetDensityEstimateToRelativeRadius ( )

inline

Specify the method to estimate point density.

The density can be calculated using a fixed sphere radius; or a sphere radius that is relative to voxel size.

Definition at line 143 of file vtkPointDensityFilter.h.

GetDensityEstimateAsString()

const char * vtkPointDensityFilter::GetDensityEstimateAsString

(

)

Specify the method to estimate point density.

The density can be calculated using a fixed sphere radius; or a sphere radius that is relative to voxel size.

SetDensityForm()

virtual void vtkPointDensityFilter::SetDensityForm ( int  )

virtual

Specify the form by which the density is expressed.

Either the density is expressed as (number of points/local sphere volume), or as simply the (number of points) within the local sphere.

GetDensityForm()

virtual int vtkPointDensityFilter::GetDensityForm ( )

virtual

Specify the form by which the density is expressed.

Either the density is expressed as (number of points/local sphere volume), or as simply the (number of points) within the local sphere.

SetDensityFormToVolumeNormalized()

void vtkPointDensityFilter::SetDensityFormToVolumeNormalized ( )

inline

Specify the form by which the density is expressed.

Either the density is expressed as (number of points/local sphere volume), or as simply the (number of points) within the local sphere.

Definition at line 158 of file vtkPointDensityFilter.h.

SetDensityFormToNumberOfPoints()

void vtkPointDensityFilter::SetDensityFormToNumberOfPoints ( )

inline

Specify the form by which the density is expressed.

Either the density is expressed as (number of points/local sphere volume), or as simply the (number of points) within the local sphere.

Definition at line 159 of file vtkPointDensityFilter.h.

GetDensityFormAsString()

const char * vtkPointDensityFilter::GetDensityFormAsString

(

)

Specify the form by which the density is expressed.

Either the density is expressed as (number of points/local sphere volume), or as simply the (number of points) within the local sphere.

SetRadius()

virtual void vtkPointDensityFilter::SetRadius ( double  )

virtual

Set / get the radius variable defining the local sphere used to estimate the density function.

The Radius is used when the density estimate is ^ set to a fixed radius (i.e., the radius doesn't change).

GetRadius()

virtual double vtkPointDensityFilter::GetRadius ( )

virtual

Set / get the radius variable defining the local sphere used to estimate the density function.

The Radius is used when the density estimate is ^ set to a fixed radius (i.e., the radius doesn't change).

SetRelativeRadius()

virtual void vtkPointDensityFilter::SetRelativeRadius ( double  )

virtual

Set / get the relative radius factor defining the local sphere used to estimate the density function.

The relative sphere radius is equal to the diagonal length of a voxel times the radius factor. The RelativeRadius is used when the density estimate is set to relative radius (i.e., relative to voxel size).

GetRelativeRadius()

virtual double vtkPointDensityFilter::GetRelativeRadius ( )

virtual

Set / get the relative radius factor defining the local sphere used to estimate the density function.

The relative sphere radius is equal to the diagonal length of a voxel times the radius factor. The RelativeRadius is used when the density estimate is set to relative radius (i.e., relative to voxel size).

SetScalarWeighting()

virtual void vtkPointDensityFilter::SetScalarWeighting ( bool  )

virtual

Turn on/off the weighting of point density by a scalar array.

By default scalar weighting is off.

GetScalarWeighting()

virtual bool vtkPointDensityFilter::GetScalarWeighting ( )

virtual

Turn on/off the weighting of point density by a scalar array.

By default scalar weighting is off.

ScalarWeightingOn()

virtual void vtkPointDensityFilter::ScalarWeightingOn ( )

virtual

Turn on/off the weighting of point density by a scalar array.

By default scalar weighting is off.

ScalarWeightingOff()

virtual void vtkPointDensityFilter::ScalarWeightingOff ( )

virtual

Turn on/off the weighting of point density by a scalar array.

By default scalar weighting is off.

SetComputeGradient()

virtual void vtkPointDensityFilter::SetComputeGradient ( bool  )

virtual

Turn on/off the generation of the gradient vector, gradient magnitude scalar, and function classification scalar.

By default this is off. Note that this will increase execution time and the size of the output. (The names of these point data arrays are: "Gradient", "Gradient Magnitude", and "Classification".)

GetComputeGradient()

virtual bool vtkPointDensityFilter::GetComputeGradient ( )

virtual

Turn on/off the generation of the gradient vector, gradient magnitude scalar, and function classification scalar.

By default this is off. Note that this will increase execution time and the size of the output. (The names of these point data arrays are: "Gradient", "Gradient Magnitude", and "Classification".)

ComputeGradientOn()

virtual void vtkPointDensityFilter::ComputeGradientOn ( )

virtual

Turn on/off the generation of the gradient vector, gradient magnitude scalar, and function classification scalar.

By default this is off. Note that this will increase execution time and the size of the output. (The names of these point data arrays are: "Gradient", "Gradient Magnitude", and "Classification".)

ComputeGradientOff()

virtual void vtkPointDensityFilter::ComputeGradientOff ( )

virtual

Turn on/off the generation of the gradient vector, gradient magnitude scalar, and function classification scalar.

By default this is off. Note that this will increase execution time and the size of the output. (The names of these point data arrays are: "Gradient", "Gradient Magnitude", and "Classification".)

SetLocator()

void vtkPointDensityFilter::SetLocator

(

vtkAbstractPointLocator *

locator

)

Specify a point locator.

By default a vtkStaticPointLocator is used. The locator performs efficient searches to locate near a specified interpolation position.

GetLocator()

virtual vtkAbstractPointLocator * vtkPointDensityFilter::GetLocator ( )

virtual

Specify a point locator.

By default a vtkStaticPointLocator is used. The locator performs efficient searches to locate near a specified interpolation position.

FillInputPortInformation()

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

overrideprotectedvirtual

These method should be reimplemented by subclasses that have more than a single input or single output.

See vtkAlgorithm for more information.

Reimplemented from vtkImageAlgorithm.

RequestInformation()

int vtkPointDensityFilter::RequestInformation ( vtkInformation *  request, vtkInformationVector **  inputVector, vtkInformationVector *  outputVector  )

overrideprotectedvirtual

Subclasses can reimplement this method to collect information from their inputs and set information for their outputs.

Reimplemented from vtkImageAlgorithm.

RequestData()

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

overrideprotectedvirtual

This is called in response to a REQUEST_DATA request from the executive.

Subclasses should override either this method or the ExecuteDataWithInformation method in order to generate data for their outputs. For images, the output arrays will already be allocated, so all that is necessary is to fill in the voxel values.

Reimplemented from vtkImageAlgorithm.

ComputeModelBounds()

void vtkPointDensityFilter::ComputeModelBounds ( vtkDataSet *  input, vtkImageData *  output, vtkInformation *  outInfo  )

protected

Member Data Documentation

SampleDimensions

int vtkPointDensityFilter::SampleDimensions[3]

protected

Definition at line 234 of file vtkPointDensityFilter.h.

ModelBounds

double vtkPointDensityFilter::ModelBounds[6]

protected

Definition at line 235 of file vtkPointDensityFilter.h.

AdjustDistance

double vtkPointDensityFilter::AdjustDistance

protected

Definition at line 236 of file vtkPointDensityFilter.h.

Origin

double vtkPointDensityFilter::Origin[3]

protected

Definition at line 237 of file vtkPointDensityFilter.h.

Spacing

double vtkPointDensityFilter::Spacing[3]

protected

Definition at line 237 of file vtkPointDensityFilter.h.

DensityEstimate

int vtkPointDensityFilter::DensityEstimate

protected

Definition at line 238 of file vtkPointDensityFilter.h.

DensityForm

int vtkPointDensityFilter::DensityForm

protected

Definition at line 239 of file vtkPointDensityFilter.h.

RelativeRadius

double vtkPointDensityFilter::RelativeRadius

protected

Definition at line 240 of file vtkPointDensityFilter.h.

Radius

double vtkPointDensityFilter::Radius

protected

Definition at line 241 of file vtkPointDensityFilter.h.

ScalarWeighting

bool vtkPointDensityFilter::ScalarWeighting

protected

Definition at line 242 of file vtkPointDensityFilter.h.

ComputeGradient

bool vtkPointDensityFilter::ComputeGradient

protected

Definition at line 243 of file vtkPointDensityFilter.h.

Locator

vtkAbstractPointLocator* vtkPointDensityFilter::Locator

protected

Definition at line 244 of file vtkPointDensityFilter.h.

---

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

• Filters/Points/vtkPointDensityFilter.h