reduce the number of triangles in a mesh More...

#include <vtkQuadricClustering.h>

Inheritance diagram for vtkQuadricClustering:

Collaboration diagram for vtkQuadricClustering:

Classes
struct	PointQuadric

Public Member Functions

void	SetNumberOfXDivisions (int num)
	Set/Get the number of divisions along each axis for the spatial bins.

void	SetNumberOfYDivisions (int num)
	Set/Get the number of divisions along each axis for the spatial bins.

void	SetNumberOfZDivisions (int num)
	Set/Get the number of divisions along each axis for the spatial bins.

virtual int	GetNumberOfXDivisions ()
	Set/Get the number of divisions along each axis for the spatial bins.

virtual int	GetNumberOfYDivisions ()
	Set/Get the number of divisions along each axis for the spatial bins.

virtual int	GetNumberOfZDivisions ()
	Set/Get the number of divisions along each axis for the spatial bins.

void	SetNumberOfDivisions (int div[3])
	Set/Get the number of divisions along each axis for the spatial bins.

void	SetNumberOfDivisions (int div0, int div1, int div2)
	Set/Get the number of divisions along each axis for the spatial bins.

int *	GetNumberOfDivisions ()
	Set/Get the number of divisions along each axis for the spatial bins.

void	GetNumberOfDivisions (int div[3])
	Set/Get the number of divisions along each axis for the spatial bins.


virtual void	SetAutoAdjustNumberOfDivisions (vtkTypeBool)
	Enable automatic adjustment of number of divisions.

virtual vtkTypeBool	GetAutoAdjustNumberOfDivisions ()
	Enable automatic adjustment of number of divisions.

virtual void	AutoAdjustNumberOfDivisionsOn ()
	Enable automatic adjustment of number of divisions.

virtual void	AutoAdjustNumberOfDivisionsOff ()
	Enable automatic adjustment of number of divisions.


void	SetDivisionOrigin (double x, double y, double z)
	This is an alternative way to set up the bins.

void	SetDivisionOrigin (double o[3])
	This is an alternative way to set up the bins.

virtual double *	GetDivisionOrigin ()
	This is an alternative way to set up the bins.

virtual void	GetDivisionOrigin (double &, double &, double &)
	This is an alternative way to set up the bins.

virtual void	GetDivisionOrigin (double[3])
	This is an alternative way to set up the bins.

void	SetDivisionSpacing (double x, double y, double z)
	This is an alternative way to set up the bins.

void	SetDivisionSpacing (double s[3])
	This is an alternative way to set up the bins.

virtual double *	GetDivisionSpacing ()
	This is an alternative way to set up the bins.

virtual void	GetDivisionSpacing (double &, double &, double &)
	This is an alternative way to set up the bins.

virtual void	GetDivisionSpacing (double[3])
	This is an alternative way to set up the bins.


virtual void	SetUseInputPoints (vtkTypeBool)
	Normally the point that minimizes the quadric error function is used as the output of the bin.

virtual vtkTypeBool	GetUseInputPoints ()
	Normally the point that minimizes the quadric error function is used as the output of the bin.

virtual void	UseInputPointsOn ()
	Normally the point that minimizes the quadric error function is used as the output of the bin.

virtual void	UseInputPointsOff ()
	Normally the point that minimizes the quadric error function is used as the output of the bin.


virtual void	SetUseFeatureEdges (vtkTypeBool)
	By default, this flag is off.

virtual vtkTypeBool	GetUseFeatureEdges ()
	By default, this flag is off.

virtual void	UseFeatureEdgesOn ()
	By default, this flag is off.

virtual void	UseFeatureEdgesOff ()
	By default, this flag is off.

vtkFeatureEdges *	GetFeatureEdges ()
	By default, this flag is off.


virtual void	SetUseFeaturePoints (vtkTypeBool)
	By default, this flag is off.

virtual vtkTypeBool	GetUseFeaturePoints ()
	By default, this flag is off.

virtual void	UseFeaturePointsOn ()
	By default, this flag is off.

virtual void	UseFeaturePointsOff ()
	By default, this flag is off.


virtual void	SetFeaturePointsAngle (double)
	Set/Get the angle to use in determining whether a point on a boundary / feature edge is a feature point.

virtual double	GetFeaturePointsAngle ()
	Set/Get the angle to use in determining whether a point on a boundary / feature edge is a feature point.


virtual void	SetUseInternalTriangles (vtkTypeBool)
	When this flag is on (and it is on by default), then triangles that are completely contained in a bin are added to the bin quadrics.

virtual vtkTypeBool	GetUseInternalTriangles ()
	When this flag is on (and it is on by default), then triangles that are completely contained in a bin are added to the bin quadrics.

virtual void	UseInternalTrianglesOn ()
	When this flag is on (and it is on by default), then triangles that are completely contained in a bin are added to the bin quadrics.

virtual void	UseInternalTrianglesOff ()
	When this flag is on (and it is on by default), then triangles that are completely contained in a bin are added to the bin quadrics.


void	StartAppend (double *bounds)
	These methods provide an alternative way of executing the filter.

void	StartAppend (double x0, double x1, double y0, double y1, double z0, double z1)
	These methods provide an alternative way of executing the filter.

void	Append (vtkPolyData *piece)
	These methods provide an alternative way of executing the filter.

void	EndAppend ()
	These methods provide an alternative way of executing the filter.


virtual void	SetCopyCellData (vtkTypeBool)
	This flag makes the filter copy cell data from input to output (the best it can).

virtual vtkTypeBool	GetCopyCellData ()
	This flag makes the filter copy cell data from input to output (the best it can).

virtual void	CopyCellDataOn ()
	This flag makes the filter copy cell data from input to output (the best it can).

virtual void	CopyCellDataOff ()
	This flag makes the filter copy cell data from input to output (the best it can).


virtual void	SetPreventDuplicateCells (vtkTypeBool)
	Specify a boolean indicating whether to remove duplicate cells (i.e.

virtual vtkTypeBool	GetPreventDuplicateCells ()
	Specify a boolean indicating whether to remove duplicate cells (i.e.

virtual void	PreventDuplicateCellsOn ()
	Specify a boolean indicating whether to remove duplicate cells (i.e.

virtual void	PreventDuplicateCellsOff ()
	Specify a boolean indicating whether to remove duplicate cells (i.e.

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

vtkPolyDataAlgorithm *	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
	see vtkAlgorithm for details

vtkDataObject *	GetInput ()

vtkDataObject *	GetInput (int port)

vtkPolyData *	GetPolyDataInput (int port)

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

vtkPolyData *	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.

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

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.

int	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	SetProgress (double)
	`SetProgress` is deprecated.

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

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

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

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.

virtual 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 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.

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.

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

void	UnRegister (vtkObjectBase *o) 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	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.

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

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

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

virtual int	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.

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

virtual void	DebugOn ()
	Turn debugging output on.

virtual void	DebugOff ()
	Turn debugging output off.

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

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

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

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time.

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

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

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

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

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method.

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

int	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not.

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

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

virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

virtual void	Delete ()
	Delete a VTK object.

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

void	InitializeObjectBase ()

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

virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).

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

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

void	SetReferenceCount (int)
	Sets the reference count.

bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.

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

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

Protected Member Functions
	vtkQuadricClustering ()

	~vtkQuadricClustering () override

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

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

vtkIdType	HashPoint (double point[3])
	Given a point, determine what bin it falls into.

void	ComputeRepresentativePoint (double quadric[9], vtkIdType binId, double point[3])
	Determine the representative point for this bin.

void	InitializeQuadric (double quadric[9])
	Initialize the quadric matrix to 0's.

void	AddQuadric (vtkIdType binId, double quadric[9])
	Add this quadric to the quadric already associated with this bin.

void	FindFeaturePoints (vtkCellArray edges, vtkPoints edgePts, double angle)
	Find the feature points of a given set of edges.

void	EndAppendVertexGeometry (vtkPolyData input, vtkPolyData output)
	This method sets the vertices of the output.

void	AppendFeatureQuadrics (vtkPolyData pd, vtkPolyData output)


void	AddPolygons (vtkCellArray polys, vtkPoints points, int geometryFlag, vtkPolyData input, vtkPolyData output)
	Add triangles to the quadric array.

void	AddStrips (vtkCellArray strips, vtkPoints points, int geometryFlag, vtkPolyData input, vtkPolyData output)
	Add triangles to the quadric array.

void	AddTriangle (vtkIdType binIds, double pt0, double pt1, double pt2, int geometeryFlag, vtkPolyData input, vtkPolyData output)
	Add triangles to the quadric array.


void	AddEdges (vtkCellArray edges, vtkPoints points, int geometryFlag, vtkPolyData input, vtkPolyData output)
	Add edges to the quadric array.

void	AddEdge (vtkIdType binIds, double pt0, double pt1, int geometeryFlag, vtkPolyData input, vtkPolyData *output)
	Add edges to the quadric array.


void	AddVertices (vtkCellArray verts, vtkPoints points, int geometryFlag, vtkPolyData input, vtkPolyData output)
	Add vertices to the quadric array.

void	AddVertex (vtkIdType binId, double pt, int geometryFlag, vtkPolyData input, vtkPolyData *output)
	Add vertices to the quadric array.

Protected Member Functions inherited from vtkPolyDataAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkPolyDataAlgorithm ()

	~vtkPolyDataAlgorithm () override

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

virtual int	RequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)
	This is called by the superclass.

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

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

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

Protected Member Functions inherited from vtkAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkAlgorithm ()

	~vtkAlgorithm () override

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 assocition 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 *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
vtkTypeBool	UseFeatureEdges

vtkTypeBool	UseFeaturePoints

vtkTypeBool	UseInternalTriangles

int	NumberOfXDivisions

int	NumberOfYDivisions

int	NumberOfZDivisions

vtkTypeBool	PreventDuplicateCells

vtkQuadricClusteringCellSet *	CellSet

vtkIdType	NumberOfBins

int	NumberOfDivisions [3]

int	ComputeNumberOfDivisions

double	DivisionOrigin [3]

double	DivisionSpacing [3]

vtkTypeBool	AutoAdjustNumberOfDivisions

double	Bounds [6]

double	XBinSize

double	YBinSize

double	ZBinSize

double	XBinStep

double	YBinStep

double	ZBinStep

vtkIdType	SliceSize

PointQuadric *	QuadricArray

vtkIdType	NumberOfBinsUsed

vtkCellArray *	OutputTriangleArray

vtkCellArray *	OutputLines

vtkFeatureEdges *	FeatureEdges

vtkPoints *	FeaturePoints

double	FeaturePointsAngle

vtkTypeBool	CopyCellData

int	InCellCount

int	OutCellCount

Protected Attributes inherited from vtkAlgorithm
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

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

vtkWeakPointerBase **	WeakPointers

typedef vtkPolyDataAlgorithm	Superclass
	Standard instantiation, type and print methods.

static vtkQuadricClustering *	New ()
	Standard instantiation, type and print methods.

static vtkTypeBool	IsTypeOf (const char *type)
	Standard instantiation, type and print methods.

static vtkQuadricClustering *	SafeDownCast (vtkObjectBase *o)
	Standard instantiation, type and print methods.

virtual vtkTypeBool	IsA (const char *type)
	Standard instantiation, type and print methods.

vtkQuadricClustering *	NewInstance () const
	Standard instantiation, type and print methods.

void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard instantiation, type and print methods.

virtual vtkObjectBase *	NewInstanceInternal () const
	Standard instantiation, type and print methods.

vtkTypeBool	UseInputPoints
	This method will rep[lace the quadric generated points with the input points with the lowest error.

void	EndAppendUsingPoints (vtkPolyData input, vtkPolyData output)
	This method will rep[lace the quadric generated points with the input points with the lowest error.

Additional Inherited Members
Public Types inherited from vtkPolyDataAlgorithm
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

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

static vtkTypeBool	IsTypeOf (const char *type)

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

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

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

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

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class.

static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

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

static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.

static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Public Attributes inherited from vtkAlgorithm
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 vtkExecutive *	DefaultExecutivePrototype

Detailed Description

reduce the number of triangles in a mesh

vtkQuadricClustering is a filter to reduce the number of triangles in a triangle mesh, forming a good approximation to the original geometry. The input to vtkQuadricClustering is a vtkPolyData object, and all types of polygonal data are handled.

The algorithm used is the one described by Peter Lindstrom in his Siggraph 2000 paper, "Out-of-Core Simplification of Large Polygonal Models." The general approach of the algorithm is to cluster vertices in a uniform binning of space, accumulating the quadric of each triangle (pushed out to the triangles vertices) within each bin, and then determining an optimal position for a single vertex in a bin by using the accumulated quadric. In more detail, the algorithm first gets the bounds of the input poly data. It then breaks this bounding volume into a user-specified number of spatial bins. It then reads each triangle from the input and hashes its vertices into these bins. (If this is the first time a bin has been visited, initialize its quadric to the 0 matrix.) The algorithm computes the error quadric for this triangle and adds it to the existing quadric of the bin in which each vertex is contained. Then, if 2 or more vertices of the triangle fall in the same bin, the triangle is dicarded. If the triangle is not discarded, it adds the triangle to the list of output triangles as a list of vertex identifiers. (There is one vertex id per bin.) After all the triangles have been read, the representative vertex for each bin is computed (an optimal location is found) using the quadric for that bin. This determines the spatial location of the vertices of each of the triangles in the output.

To use this filter, specify the divisions defining the spatial subdivision in the x, y, and z directions. You must also specify an input vtkPolyData. Then choose to either 1) use the original points that minimize the quadric error to produce the output triangles or 2) compute an optimal position in each bin to produce the output triangles (recommended and default behavior).

This filter can take multiple inputs. To do this, the user must explicitly call StartAppend, Append (once for each input), and EndAppend. StartAppend sets up the data structure to hold the quadric matrices. Append processes each triangle in the input poly data it was called on, hashes its vertices to the appropriate bins, determines whether to keep this triangle, and updates the appropriate quadric matrices. EndAppend determines the spatial location of each of the representative vertices for the visited bins. While this approach does not fit into the visualization architecture and requires manual control, it has the advantage that extremely large data can be processed in pieces and appended to the filter piece-by-piece.

Warning: This filter can drastically affect topology, i.e., topology is not preserved.; The filter handles input triangle strips and arbitrary polygons. Arbitrary polygons are assumed convex: during insertion they are triangulated using a fan of triangles from the first point in the polygons. If the polygon is concave, this can produce bad results. In this case, use vtkTriangleFilter to triangulate the polygons first.; The filter also treats polylines and vertices.; Note that for certain types of geometry (e.g., a mostly 2D plane with jitter in the normal direction), the decimator can perform badly. In this situation, set the number of bins in the normal direction to one.; vtkBinnedDecimation produces similar results with significant speedup and reduced memory consumption.

See also: vtkQuadricDecimation vtkDecimatePro vtkDecimate vtkQuadricLODActor vtkBinnedDecimation

Online Examples:

QuadricClustering

Definition at line 120 of file vtkQuadricClustering.h.

Member Typedef Documentation

◆ Superclass

typedef vtkPolyDataAlgorithm vtkQuadricClustering::Superclass

Standard instantiation, type and print methods.

Definition at line 128 of file vtkQuadricClustering.h.

Constructor & Destructor Documentation

◆ vtkQuadricClustering()

vtkQuadricClustering::vtkQuadricClustering ( )

protected

◆ ~vtkQuadricClustering()

vtkQuadricClustering::~vtkQuadricClustering ( )

overrideprotected

Member Function Documentation

◆ New()

static vtkQuadricClustering * vtkQuadricClustering::New ( )

static

Standard instantiation, type and print methods.

◆ IsTypeOf()

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

static

Standard instantiation, type and print methods.

◆ IsA()

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

virtual

Standard instantiation, type and print methods.

Reimplemented from vtkPolyDataAlgorithm.

◆ SafeDownCast()

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

static

Standard instantiation, type and print methods.

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkQuadricClustering::NewInstanceInternal ( ) const

protectedvirtual

Standard instantiation, type and print methods.

Reimplemented from vtkPolyDataAlgorithm.

◆ NewInstance()

vtkQuadricClustering * vtkQuadricClustering::NewInstance ( ) const

Standard instantiation, type and print methods.

◆ PrintSelf()

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

overridevirtual

Standard instantiation, type and print methods.

Reimplemented from vtkPolyDataAlgorithm.