vtkDecimatePro Class Reference

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

#include <vtkDecimatePro.h>

Inheritance diagram for vtkDecimatePro:

Collaboration diagram for vtkDecimatePro:

Classes
class	LocalTri
class	LocalVertex
class	TriArray
class	VertexArray

Public Types
typedef vtkPolyDataAlgorithm	Superclass
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

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.
vtkDecimatePro *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.
vtkIdType	GetNumberOfInflectionPoints ()
	Get the number of inflection points.
void	GetInflectionPoints (double *inflectionPoints)
	Get a list of inflection points.
double *	GetInflectionPoints ()
	Get a list of inflection points.
virtual void	SetTargetReduction (double)
	Specify the desired reduction in the total number of polygons (e.g., if TargetReduction is set to 0.9, this filter will try to reduce the data set to 10% of its original size).
virtual double	GetTargetReduction ()
	Specify the desired reduction in the total number of polygons (e.g., if TargetReduction is set to 0.9, this filter will try to reduce the data set to 10% of its original size).
virtual void	SetPreserveTopology (vtkTypeBool)
	Turn on/off whether to preserve the topology of the original mesh.
virtual vtkTypeBool	GetPreserveTopology ()
	Turn on/off whether to preserve the topology of the original mesh.
virtual void	PreserveTopologyOn ()
	Turn on/off whether to preserve the topology of the original mesh.
virtual void	PreserveTopologyOff ()
	Turn on/off whether to preserve the topology of the original mesh.
virtual void	SetFeatureAngle (double)
	Specify the mesh feature angle.
virtual double	GetFeatureAngle ()
	Specify the mesh feature angle.
virtual void	SetSplitting (vtkTypeBool)
	Turn on/off the splitting of the mesh at corners, along edges, at non-manifold points, or anywhere else a split is required.
virtual vtkTypeBool	GetSplitting ()
	Turn on/off the splitting of the mesh at corners, along edges, at non-manifold points, or anywhere else a split is required.
virtual void	SplittingOn ()
	Turn on/off the splitting of the mesh at corners, along edges, at non-manifold points, or anywhere else a split is required.
virtual void	SplittingOff ()
	Turn on/off the splitting of the mesh at corners, along edges, at non-manifold points, or anywhere else a split is required.
virtual void	SetSplitAngle (double)
	Specify the mesh split angle.
virtual double	GetSplitAngle ()
	Specify the mesh split angle.
virtual void	SetPreSplitMesh (vtkTypeBool)
	In some cases you may wish to split the mesh prior to algorithm execution.
virtual vtkTypeBool	GetPreSplitMesh ()
	In some cases you may wish to split the mesh prior to algorithm execution.
virtual void	PreSplitMeshOn ()
	In some cases you may wish to split the mesh prior to algorithm execution.
virtual void	PreSplitMeshOff ()
	In some cases you may wish to split the mesh prior to algorithm execution.
virtual void	SetMaximumError (double)
	Set the largest decimation error that is allowed during the decimation process.
virtual double	GetMaximumError ()
	Set the largest decimation error that is allowed during the decimation process.
virtual void	SetAccumulateError (vtkTypeBool)
	The computed error can either be computed directly from the mesh or the error may be accumulated as the mesh is modified.
virtual vtkTypeBool	GetAccumulateError ()
	The computed error can either be computed directly from the mesh or the error may be accumulated as the mesh is modified.
virtual void	AccumulateErrorOn ()
	The computed error can either be computed directly from the mesh or the error may be accumulated as the mesh is modified.
virtual void	AccumulateErrorOff ()
	The computed error can either be computed directly from the mesh or the error may be accumulated as the mesh is modified.
virtual void	SetErrorIsAbsolute (int)
	The MaximumError is normally defined as a fraction of the dataset bounding diagonal.
virtual int	GetErrorIsAbsolute ()
	The MaximumError is normally defined as a fraction of the dataset bounding diagonal.
virtual void	SetAbsoluteError (double)
	Same as MaximumError, but to be used when ErrorIsAbsolute is 1.
virtual double	GetAbsoluteError ()
	Same as MaximumError, but to be used when ErrorIsAbsolute is 1.
virtual void	SetBoundaryVertexDeletion (vtkTypeBool)
	Turn on/off the deletion of vertices on the boundary of a mesh.
virtual vtkTypeBool	GetBoundaryVertexDeletion ()
	Turn on/off the deletion of vertices on the boundary of a mesh.
virtual void	BoundaryVertexDeletionOn ()
	Turn on/off the deletion of vertices on the boundary of a mesh.
virtual void	BoundaryVertexDeletionOff ()
	Turn on/off the deletion of vertices on the boundary of a mesh.
virtual void	SetDegree (int)
	If the number of triangles connected to a vertex exceeds "Degree", then the vertex will be split.
virtual int	GetDegree ()
	If the number of triangles connected to a vertex exceeds "Degree", then the vertex will be split.
virtual void	SetInflectionPointRatio (double)
	Specify the inflection point ratio.
virtual double	GetInflectionPointRatio ()
	Specify the inflection point ratio.
virtual void	SetOutputPointsPrecision (int)
	Set/get the desired precision for the output types.
virtual int	GetOutputPointsPrecision ()
	Set/get the desired precision for the output types.
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.
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.
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 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.
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 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.

Static Public Member Functions
static vtkTypeBool	IsTypeOf (const char *type)
static vtkDecimatePro *	SafeDownCast (vtkObjectBase *o)
static vtkDecimatePro *	New ()
	Create object with specified reduction of 90% and feature angle of 15 degrees.
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 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.

Protected Types
typedef LocalVertex *	LocalVertexPtr
typedef LocalTri *	LocalTriPtr

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkDecimatePro ()
	~vtkDecimatePro () override
int	RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
	This is called by the superclass.
void	SplitMesh ()
int	EvaluateVertex (vtkIdType ptId, vtkIdType numTris, vtkIdType *tris, vtkIdType fedges[2])
vtkIdType	FindSplit (int type, vtkIdType fedges[2], vtkIdType &pt1, vtkIdType &pt2, vtkIdList *CollapseTris)
int	IsValidSplit (int index)
void	SplitLoop (vtkIdType fedges[2], vtkIdType &n1, vtkIdType *l1, vtkIdType &n2, vtkIdType *l2)
void	SplitVertex (vtkIdType ptId, int type, vtkIdType numTris, vtkIdType *tris, int insert)
int	CollapseEdge (int type, vtkIdType ptId, vtkIdType collapseId, vtkIdType pt1, vtkIdType pt2, vtkIdList *CollapseTris)
void	DistributeError (double error)
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.
virtual int	RequestUpdateTime (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
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
double	TargetReduction
double	FeatureAngle
double	MaximumError
double	AbsoluteError
int	ErrorIsAbsolute
vtkTypeBool	AccumulateError
double	SplitAngle
vtkTypeBool	Splitting
vtkTypeBool	PreSplitMesh
vtkTypeBool	BoundaryVertexDeletion
vtkTypeBool	PreserveTopology
int	Degree
double	InflectionPointRatio
vtkDoubleArray *	InflectionPoints
int	OutputPointsPrecision
vtkIdList *	Neighbors
vtkPriorityQueue *	EdgeLengths
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

Friends
class	VertexArray
class	TriArray

Additional Inherited Members
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

reduce the number of triangles in a mesh

vtkDecimatePro is a filter to reduce the number of triangles in a triangle mesh, forming a good approximation to the original geometry. The input to vtkDecimatePro is a vtkPolyData object, and only triangles are treated. If you desire to decimate polygonal meshes, first triangulate the polygons with vtkTriangleFilter object.

The implementation of vtkDecimatePro is similar to the algorithm originally described in "Decimation of Triangle Meshes", Proc Siggraph `92, with three major differences. First, this algorithm does not necessarily preserve the topology of the mesh. Second, it is guaranteed to give the a mesh reduction factor specified by the user (as long as certain constraints are not set - see Caveats). Third, it is set up generate progressive meshes, that is a stream of operations that can be easily transmitted and incrementally updated (see Hugues Hoppe's Siggraph '96 paper on progressive meshes).

The algorithm proceeds as follows. Each vertex in the mesh is classified and inserted into a priority queue. The priority is based on the error to delete the vertex and retriangulate the hole. Vertices that cannot be deleted or triangulated (at this point in the algorithm) are skipped. Then, each vertex in the priority queue is processed (i.e., deleted followed by hole triangulation using edge collapse). This continues until the priority queue is empty. Next, all remaining vertices are processed, and the mesh is split into separate pieces along sharp edges or at non-manifold attachment points and reinserted into the priority queue. Again, the priority queue is processed until empty. If the desired reduction is still not achieved, the remaining vertices are split as necessary (in a recursive fashion) so that it is possible to eliminate every triangle as necessary.

To use this object, at a minimum you need to specify the ivar TargetReduction. The algorithm is guaranteed to generate a reduced mesh at this level as long as the following four conditions are met: 1) topology modification is allowed (i.e., the ivar PreserveTopology is off); 2) mesh splitting is enabled (i.e., the ivar Splitting is on); 3) the algorithm is allowed to modify the boundary of the mesh (i.e., the ivar BoundaryVertexDeletion is on); and 4) the maximum allowable error (i.e., the ivar MaximumError) is set to VTK_DOUBLE_MAX. Other important parameters to adjust include the FeatureAngle and SplitAngle ivars, since these can impact the quality of the final mesh. Also, you can set the ivar AccumulateError to force incremental error update and distribution to surrounding vertices as each vertex is deleted. The accumulated error is a conservative global error bounds and decimation error, but requires additional memory and time to compute.

Warning

To guarantee a given level of reduction, the ivar PreserveTopology must be off; the ivar Splitting is on; the ivar BoundaryVertexDeletion is on; and the ivar MaximumError is set to VTK_DOUBLE_MAX.

If PreserveTopology is off, and SplitEdges is off; the mesh topology may be modified by closing holes.

Once mesh splitting begins, the feature angle is set to the split angle.

See also

vtkDecimate vtkQuadricClustering vtkQuadricDecimation

Online Examples:

Decimation

StripFran

ClipArt

FroggieSurface

DecimateFran

DecimateHawaii

PineRootDecimation

Tests:

vtkDecimatePro (Tests)

Definition at line 162 of file vtkDecimatePro.h.

Member Typedef Documentation

Superclass

typedef vtkPolyDataAlgorithm vtkDecimatePro::Superclass

Definition at line 165 of file vtkDecimatePro.h.

LocalVertexPtr

typedef LocalVertex* vtkDecimatePro::LocalVertexPtr

protected

Definition at line 407 of file vtkDecimatePro.h.

LocalTriPtr

typedef LocalTri* vtkDecimatePro::LocalTriPtr

protected

Definition at line 417 of file vtkDecimatePro.h.

Constructor & Destructor Documentation

vtkDecimatePro()

vtkDecimatePro::vtkDecimatePro ( )

protected

~vtkDecimatePro()

vtkDecimatePro::~vtkDecimatePro ( )

overrideprotected

Member Function Documentation

IsTypeOf()

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

static

IsA()

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

virtual

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

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

Reimplemented from vtkPolyDataAlgorithm.

SafeDownCast()

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

static

NewInstanceInternal()

virtual vtkObjectBase * vtkDecimatePro::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkPolyDataAlgorithm.

NewInstance()

vtkDecimatePro * vtkDecimatePro::NewInstance

(

)

const

PrintSelf()

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

overridevirtual

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

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

Reimplemented from vtkAlgorithm.

New()

static vtkDecimatePro * vtkDecimatePro::New ( )

static

Create object with specified reduction of 90% and feature angle of 15 degrees.

Edge splitting is on, defer splitting is on, and the split angle is 75 degrees. Topology preservation is off, delete boundary vertices is on, and the maximum error is set to VTK_DOUBLE_MAX. The inflection point ratio is 10 and the vertex degree is 25. Error accumulation is turned off.

SetTargetReduction()

virtual void vtkDecimatePro::SetTargetReduction ( double  )

virtual

Specify the desired reduction in the total number of polygons (e.g., if TargetReduction is set to 0.9, this filter will try to reduce the data set to 10% of its original size).

Because of various constraints, this level of reduction may not be realized. If you want to guarantee a particular reduction, you must turn off PreserveTopology, turn on SplitEdges and BoundaryVertexDeletion, and set the MaximumError to VTK_DOUBLE_MAX (these ivars are initialized this way when the object is instantiated).

GetTargetReduction()

virtual double vtkDecimatePro::GetTargetReduction ( )

virtual

Specify the desired reduction in the total number of polygons (e.g., if TargetReduction is set to 0.9, this filter will try to reduce the data set to 10% of its original size).

Because of various constraints, this level of reduction may not be realized. If you want to guarantee a particular reduction, you must turn off PreserveTopology, turn on SplitEdges and BoundaryVertexDeletion, and set the MaximumError to VTK_DOUBLE_MAX (these ivars are initialized this way when the object is instantiated).

SetPreserveTopology()

virtual void vtkDecimatePro::SetPreserveTopology ( vtkTypeBool  )

virtual

Turn on/off whether to preserve the topology of the original mesh.

If on, mesh splitting and hole elimination will not occur. This may limit the maximum reduction that may be achieved.

GetPreserveTopology()

virtual vtkTypeBool vtkDecimatePro::GetPreserveTopology ( )

virtual

Turn on/off whether to preserve the topology of the original mesh.

If on, mesh splitting and hole elimination will not occur. This may limit the maximum reduction that may be achieved.

PreserveTopologyOn()

virtual void vtkDecimatePro::PreserveTopologyOn ( )

virtual

Turn on/off whether to preserve the topology of the original mesh.

If on, mesh splitting and hole elimination will not occur. This may limit the maximum reduction that may be achieved.

PreserveTopologyOff()

virtual void vtkDecimatePro::PreserveTopologyOff ( )

virtual

Turn on/off whether to preserve the topology of the original mesh.

If on, mesh splitting and hole elimination will not occur. This may limit the maximum reduction that may be achieved.

SetFeatureAngle()

virtual void vtkDecimatePro::SetFeatureAngle ( double  )

virtual

Specify the mesh feature angle.

This angle is used to define what an edge is (i.e., if the surface normal between two adjacent triangles is >= FeatureAngle, an edge exists).

GetFeatureAngle()

virtual double vtkDecimatePro::GetFeatureAngle ( )

virtual

Specify the mesh feature angle.

This angle is used to define what an edge is (i.e., if the surface normal between two adjacent triangles is >= FeatureAngle, an edge exists).

SetSplitting()

virtual void vtkDecimatePro::SetSplitting ( vtkTypeBool  )

virtual

Turn on/off the splitting of the mesh at corners, along edges, at non-manifold points, or anywhere else a split is required.

Turning splitting off will better preserve the original topology of the mesh, but you may not obtain the requested reduction.

GetSplitting()

virtual vtkTypeBool vtkDecimatePro::GetSplitting ( )

virtual

Turn on/off the splitting of the mesh at corners, along edges, at non-manifold points, or anywhere else a split is required.

Turning splitting off will better preserve the original topology of the mesh, but you may not obtain the requested reduction.

SplittingOn()

virtual void vtkDecimatePro::SplittingOn ( )

virtual

Turn on/off the splitting of the mesh at corners, along edges, at non-manifold points, or anywhere else a split is required.

Turning splitting off will better preserve the original topology of the mesh, but you may not obtain the requested reduction.

SplittingOff()

virtual void vtkDecimatePro::SplittingOff ( )

virtual

Turn on/off the splitting of the mesh at corners, along edges, at non-manifold points, or anywhere else a split is required.

Turning splitting off will better preserve the original topology of the mesh, but you may not obtain the requested reduction.

SetSplitAngle()

virtual void vtkDecimatePro::SetSplitAngle ( double  )

virtual

Specify the mesh split angle.

This angle is used to control the splitting of the mesh. A split line exists when the surface normals between two edge connected triangles are >= SplitAngle.

GetSplitAngle()

virtual double vtkDecimatePro::GetSplitAngle ( )

virtual

Specify the mesh split angle.

This angle is used to control the splitting of the mesh. A split line exists when the surface normals between two edge connected triangles are >= SplitAngle.

SetPreSplitMesh()

virtual void vtkDecimatePro::SetPreSplitMesh ( vtkTypeBool  )

virtual

In some cases you may wish to split the mesh prior to algorithm execution.

This separates the mesh into semi-planar patches, which are disconnected from each other. This can give superior results in some cases. If the ivar PreSplitMesh ivar is enabled, the mesh is split with the specified SplitAngle. Otherwise mesh splitting is deferred as long as possible.

GetPreSplitMesh()

virtual vtkTypeBool vtkDecimatePro::GetPreSplitMesh ( )

virtual

In some cases you may wish to split the mesh prior to algorithm execution.

This separates the mesh into semi-planar patches, which are disconnected from each other. This can give superior results in some cases. If the ivar PreSplitMesh ivar is enabled, the mesh is split with the specified SplitAngle. Otherwise mesh splitting is deferred as long as possible.

PreSplitMeshOn()

virtual void vtkDecimatePro::PreSplitMeshOn ( )

virtual

In some cases you may wish to split the mesh prior to algorithm execution.

This separates the mesh into semi-planar patches, which are disconnected from each other. This can give superior results in some cases. If the ivar PreSplitMesh ivar is enabled, the mesh is split with the specified SplitAngle. Otherwise mesh splitting is deferred as long as possible.

PreSplitMeshOff()

virtual void vtkDecimatePro::PreSplitMeshOff ( )

virtual

In some cases you may wish to split the mesh prior to algorithm execution.

This separates the mesh into semi-planar patches, which are disconnected from each other. This can give superior results in some cases. If the ivar PreSplitMesh ivar is enabled, the mesh is split with the specified SplitAngle. Otherwise mesh splitting is deferred as long as possible.

SetMaximumError()

virtual void vtkDecimatePro::SetMaximumError ( double  )

virtual

Set the largest decimation error that is allowed during the decimation process.

This may limit the maximum reduction that may be achieved. The maximum error is specified as a fraction of the maximum length of the input data bounding box.

GetMaximumError()

virtual double vtkDecimatePro::GetMaximumError ( )

virtual

Set the largest decimation error that is allowed during the decimation process.

This may limit the maximum reduction that may be achieved. The maximum error is specified as a fraction of the maximum length of the input data bounding box.

SetAccumulateError()

virtual void vtkDecimatePro::SetAccumulateError ( vtkTypeBool  )

virtual

The computed error can either be computed directly from the mesh or the error may be accumulated as the mesh is modified.

If the error is accumulated, then it represents a global error bounds, and the ivar MaximumError becomes a global bounds on mesh error. Accumulating the error requires extra memory proportional to the number of vertices in the mesh. If AccumulateError is off, then the error is not accumulated.

GetAccumulateError()

virtual vtkTypeBool vtkDecimatePro::GetAccumulateError ( )

virtual

The computed error can either be computed directly from the mesh or the error may be accumulated as the mesh is modified.

If the error is accumulated, then it represents a global error bounds, and the ivar MaximumError becomes a global bounds on mesh error. Accumulating the error requires extra memory proportional to the number of vertices in the mesh. If AccumulateError is off, then the error is not accumulated.

AccumulateErrorOn()

virtual void vtkDecimatePro::AccumulateErrorOn ( )

virtual

The computed error can either be computed directly from the mesh or the error may be accumulated as the mesh is modified.

If the error is accumulated, then it represents a global error bounds, and the ivar MaximumError becomes a global bounds on mesh error. Accumulating the error requires extra memory proportional to the number of vertices in the mesh. If AccumulateError is off, then the error is not accumulated.

AccumulateErrorOff()

virtual void vtkDecimatePro::AccumulateErrorOff ( )

virtual

The computed error can either be computed directly from the mesh or the error may be accumulated as the mesh is modified.

If the error is accumulated, then it represents a global error bounds, and the ivar MaximumError becomes a global bounds on mesh error. Accumulating the error requires extra memory proportional to the number of vertices in the mesh. If AccumulateError is off, then the error is not accumulated.

SetErrorIsAbsolute()

virtual void vtkDecimatePro::SetErrorIsAbsolute ( int  )

virtual

The MaximumError is normally defined as a fraction of the dataset bounding diagonal.

By setting ErrorIsAbsolute to 1, the error is instead defined as that specified by AbsoluteError. By default ErrorIsAbsolute=0.

GetErrorIsAbsolute()

virtual int vtkDecimatePro::GetErrorIsAbsolute ( )

virtual

The MaximumError is normally defined as a fraction of the dataset bounding diagonal.

By setting ErrorIsAbsolute to 1, the error is instead defined as that specified by AbsoluteError. By default ErrorIsAbsolute=0.

SetAbsoluteError()

virtual void vtkDecimatePro::SetAbsoluteError ( double  )

virtual

Same as MaximumError, but to be used when ErrorIsAbsolute is 1.

GetAbsoluteError()

virtual double vtkDecimatePro::GetAbsoluteError ( )

virtual

Same as MaximumError, but to be used when ErrorIsAbsolute is 1.

SetBoundaryVertexDeletion()

virtual void vtkDecimatePro::SetBoundaryVertexDeletion ( vtkTypeBool  )

virtual

Turn on/off the deletion of vertices on the boundary of a mesh.

This may limit the maximum reduction that may be achieved.

GetBoundaryVertexDeletion()

virtual vtkTypeBool vtkDecimatePro::GetBoundaryVertexDeletion ( )

virtual

Turn on/off the deletion of vertices on the boundary of a mesh.

This may limit the maximum reduction that may be achieved.

BoundaryVertexDeletionOn()

virtual void vtkDecimatePro::BoundaryVertexDeletionOn ( )

virtual

Turn on/off the deletion of vertices on the boundary of a mesh.

This may limit the maximum reduction that may be achieved.

BoundaryVertexDeletionOff()

virtual void vtkDecimatePro::BoundaryVertexDeletionOff ( )

virtual

Turn on/off the deletion of vertices on the boundary of a mesh.

This may limit the maximum reduction that may be achieved.

SetDegree()

virtual void vtkDecimatePro::SetDegree ( int  )

virtual

If the number of triangles connected to a vertex exceeds "Degree", then the vertex will be split.

(NOTE: the complexity of the triangulation algorithm is proportional to Degree^2. Setting degree small can improve the performance of the algorithm.)

GetDegree()

virtual int vtkDecimatePro::GetDegree ( )

virtual

If the number of triangles connected to a vertex exceeds "Degree", then the vertex will be split.

(NOTE: the complexity of the triangulation algorithm is proportional to Degree^2. Setting degree small can improve the performance of the algorithm.)

SetInflectionPointRatio()

virtual void vtkDecimatePro::SetInflectionPointRatio ( double  )

virtual

Specify the inflection point ratio.

An inflection point occurs when the ratio of reduction error between two iterations is greater than or equal to the InflectionPointRatio.

GetInflectionPointRatio()

virtual double vtkDecimatePro::GetInflectionPointRatio ( )

virtual

Specify the inflection point ratio.

An inflection point occurs when the ratio of reduction error between two iterations is greater than or equal to the InflectionPointRatio.

GetNumberOfInflectionPoints()

vtkIdType vtkDecimatePro::GetNumberOfInflectionPoints

(

)

Get the number of inflection points.

Only returns a valid value after the filter has executed. The values in the list are mesh reduction values at each inflection point. Note: the first inflection point always occurs right before non-planar triangles are decimated (i.e., as the error becomes non-zero).

GetInflectionPoints() [1/2]

void vtkDecimatePro::GetInflectionPoints

(

double *

inflectionPoints

)

Get a list of inflection points.

These are double values 0 < r <= 1.0 corresponding to reduction level, and there are a total of NumberOfInflectionPoints() values. You must provide an array (of the correct size) into which the inflection points are written.

GetInflectionPoints() [2/2]

double * vtkDecimatePro::GetInflectionPoints

(

)

Get a list of inflection points.

These are double values 0 < r <= 1.0 corresponding to reduction level, and there are a total of NumberOfInflectionPoints() values. You must provide an array (of the correct size) into which the inflection points are written. This method returns a pointer to a list of inflection points.

SetOutputPointsPrecision()

virtual void vtkDecimatePro::SetOutputPointsPrecision ( int  )

virtual

Set/get the desired precision for the output types.

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

GetOutputPointsPrecision()

virtual int vtkDecimatePro::GetOutputPointsPrecision ( )

virtual

Set/get the desired precision for the output types.

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

RequestData()

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

overrideprotectedvirtual

This is called by the superclass.

This is the method you should override.

Reimplemented from vtkPolyDataAlgorithm.

SplitMesh()

void vtkDecimatePro::SplitMesh ( )

protected

EvaluateVertex()

int vtkDecimatePro::EvaluateVertex ( vtkIdType  ptId, vtkIdType  numTris, vtkIdType *  tris, vtkIdType  fedges[2]  )

protected

FindSplit()

vtkIdType vtkDecimatePro::FindSplit ( int  type, vtkIdType  fedges[2], vtkIdType &  pt1, vtkIdType &  pt2, vtkIdList *  CollapseTris  )

protected

IsValidSplit()

int vtkDecimatePro::IsValidSplit ( int  index )

protected

SplitLoop()

void vtkDecimatePro::SplitLoop ( vtkIdType  fedges[2], vtkIdType &  n1, vtkIdType *  l1, vtkIdType &  n2, vtkIdType *  l2  )

protected

SplitVertex()

void vtkDecimatePro::SplitVertex ( vtkIdType  ptId, int  type, vtkIdType  numTris, vtkIdType *  tris, int  insert  )

protected

CollapseEdge()

int vtkDecimatePro::CollapseEdge ( int  type, vtkIdType  ptId, vtkIdType  collapseId, vtkIdType  pt1, vtkIdType  pt2, vtkIdList *  CollapseTris  )

protected

DistributeError()

void vtkDecimatePro::DistributeError ( double  error )

protected

Friends And Related Symbol Documentation

VertexArray

friend class VertexArray

friend

Definition at line 420 of file vtkDecimatePro.h.

TriArray

friend class TriArray

friend

Definition at line 444 of file vtkDecimatePro.h.

Member Data Documentation

TargetReduction

double vtkDecimatePro::TargetReduction

protected

Definition at line 365 of file vtkDecimatePro.h.

FeatureAngle

double vtkDecimatePro::FeatureAngle

protected

Definition at line 366 of file vtkDecimatePro.h.

MaximumError

double vtkDecimatePro::MaximumError

protected

Definition at line 367 of file vtkDecimatePro.h.

AbsoluteError

double vtkDecimatePro::AbsoluteError

protected

Definition at line 368 of file vtkDecimatePro.h.

ErrorIsAbsolute

int vtkDecimatePro::ErrorIsAbsolute

protected

Definition at line 369 of file vtkDecimatePro.h.

AccumulateError

vtkTypeBool vtkDecimatePro::AccumulateError

protected

Definition at line 370 of file vtkDecimatePro.h.

SplitAngle

double vtkDecimatePro::SplitAngle

protected

Definition at line 371 of file vtkDecimatePro.h.

Splitting

vtkTypeBool vtkDecimatePro::Splitting

protected

Definition at line 372 of file vtkDecimatePro.h.

PreSplitMesh

vtkTypeBool vtkDecimatePro::PreSplitMesh

protected

Definition at line 373 of file vtkDecimatePro.h.

BoundaryVertexDeletion

vtkTypeBool vtkDecimatePro::BoundaryVertexDeletion

protected

Definition at line 374 of file vtkDecimatePro.h.

PreserveTopology

vtkTypeBool vtkDecimatePro::PreserveTopology

protected

Definition at line 375 of file vtkDecimatePro.h.

Degree

int vtkDecimatePro::Degree

protected

Definition at line 376 of file vtkDecimatePro.h.

InflectionPointRatio

double vtkDecimatePro::InflectionPointRatio

protected

Definition at line 377 of file vtkDecimatePro.h.

InflectionPoints

vtkDoubleArray* vtkDecimatePro::InflectionPoints

protected

Definition at line 378 of file vtkDecimatePro.h.

OutputPointsPrecision

int vtkDecimatePro::OutputPointsPrecision

protected

Definition at line 379 of file vtkDecimatePro.h.

Neighbors

vtkIdList* vtkDecimatePro::Neighbors

protected

Definition at line 382 of file vtkDecimatePro.h.

EdgeLengths

vtkPriorityQueue* vtkDecimatePro::EdgeLengths

protected

Definition at line 383 of file vtkDecimatePro.h.

---

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

• Filters/Core/vtkDecimatePro.h