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vtkQuadricDecimation Class Reference

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

#include <vtkQuadricDecimation.h>

Inheritance diagram for vtkQuadricDecimation:
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Collaboration diagram for vtkQuadricDecimation:
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Classes

struct  ErrorQuadric
 

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. More...
 
vtkQuadricDecimationNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
virtual void SetTargetReduction (double)
 Set/Get the desired reduction (expressed as a fraction of the original number of triangles). More...
 
virtual double GetTargetReduction ()
 
virtual void SetAttributeErrorMetric (vtkTypeBool)
 Decide whether to include data attributes in the error metric. More...
 
virtual vtkTypeBool GetAttributeErrorMetric ()
 
virtual void AttributeErrorMetricOn ()
 
virtual void AttributeErrorMetricOff ()
 
virtual void SetVolumePreservation (vtkTypeBool)
 Decide whether to activate volume preservation which greatly reduces errors in triangle normal direction. More...
 
virtual vtkTypeBool GetVolumePreservation ()
 
virtual void VolumePreservationOn ()
 
virtual void VolumePreservationOff ()
 
virtual void SetScalarsAttribute (vtkTypeBool)
 If attribute errors are to be included in the metric (i.e., AttributeErrorMetric is on), then the following flags control which attributes are to be included in the error calculation. More...
 
virtual vtkTypeBool GetScalarsAttribute ()
 
virtual void ScalarsAttributeOn ()
 
virtual void ScalarsAttributeOff ()
 
virtual void SetVectorsAttribute (vtkTypeBool)
 
virtual vtkTypeBool GetVectorsAttribute ()
 
virtual void VectorsAttributeOn ()
 
virtual void VectorsAttributeOff ()
 
virtual void SetNormalsAttribute (vtkTypeBool)
 
virtual vtkTypeBool GetNormalsAttribute ()
 
virtual void NormalsAttributeOn ()
 
virtual void NormalsAttributeOff ()
 
virtual void SetTCoordsAttribute (vtkTypeBool)
 
virtual vtkTypeBool GetTCoordsAttribute ()
 
virtual void TCoordsAttributeOn ()
 
virtual void TCoordsAttributeOff ()
 
virtual void SetTensorsAttribute (vtkTypeBool)
 
virtual vtkTypeBool GetTensorsAttribute ()
 
virtual void TensorsAttributeOn ()
 
virtual void TensorsAttributeOff ()
 
virtual void SetScalarsWeight (double)
 Set/Get the scaling weight contribution of the attribute. More...
 
virtual void SetVectorsWeight (double)
 
virtual void SetNormalsWeight (double)
 
virtual void SetTCoordsWeight (double)
 
virtual void SetTensorsWeight (double)
 
virtual double GetScalarsWeight ()
 
virtual double GetVectorsWeight ()
 
virtual double GetNormalsWeight ()
 
virtual double GetTCoordsWeight ()
 
virtual double GetTensorsWeight ()
 
virtual double GetActualReduction ()
 Get the actual reduction. More...
 
- Public Member Functions inherited from vtkPolyDataAlgorithm
vtkPolyDataAlgorithmNewInstance () const
 
vtkPolyDataGetOutput ()
 Get the output data object for a port on this algorithm. More...
 
vtkPolyDataGetOutput (int)
 
virtual void SetOutput (vtkDataObject *d)
 
vtkTypeBool ProcessRequest (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
 see vtkAlgorithm for details More...
 
vtkDataObjectGetInput ()
 
vtkDataObjectGetInput (int port)
 
vtkPolyDataGetPolyDataInput (int port)
 
void SetInputData (vtkDataObject *)
 Assign a data object as input. More...
 
void SetInputData (int, vtkDataObject *)
 
void AddInputData (vtkDataObject *)
 Assign a data object as input. More...
 
void AddInputData (int, vtkDataObject *)
 
- Public Member Functions inherited from vtkAlgorithm
vtkAlgorithmNewInstance () const
 
int HasExecutive ()
 Check whether this algorithm has an assigned executive. More...
 
vtkExecutiveGetExecutive ()
 Get this algorithm's executive. More...
 
virtual void SetExecutive (vtkExecutive *executive)
 Set this algorithm's executive. More...
 
vtkTypeBool ProcessRequest (vtkInformation *request, vtkCollection *inInfo, vtkInformationVector *outInfo)
 Version of ProcessRequest() that is wrapped. More...
 
virtual int ComputePipelineMTime (vtkInformation *request, vtkInformationVector **inInfoVec, vtkInformationVector *outInfoVec, int requestFromOutputPort, vtkMTimeType *mtime)
 A special version of ProcessRequest meant specifically for the pipeline modified time request. More...
 
virtual int ModifyRequest (vtkInformation *request, int when)
 This method gives the algorithm a chance to modify the contents of a request before or after (specified in the when argument) it is forwarded. More...
 
vtkInformationGetInputPortInformation (int port)
 Get the information object associated with an input port. More...
 
vtkInformationGetOutputPortInformation (int port)
 Get the information object associated with an output port. More...
 
virtual vtkInformationGetInformation ()
 Set/Get the information object associated with this algorithm. More...
 
virtual void SetInformation (vtkInformation *)
 
int GetNumberOfInputPorts ()
 Get the number of input ports used by the algorithm. More...
 
int GetNumberOfOutputPorts ()
 Get the number of output ports provided by the algorithm. More...
 
void Register (vtkObjectBase *o) override
 Participate in garbage collection. More...
 
void UnRegister (vtkObjectBase *o) override
 Decrease the reference count (release by another object). More...
 
virtual void SetAbortExecute (vtkTypeBool)
 Set/Get the AbortExecute flag for the process object. More...
 
virtual vtkTypeBool GetAbortExecute ()
 
virtual void AbortExecuteOn ()
 
virtual void AbortExecuteOff ()
 
virtual double GetProgress ()
 Get the execution progress of a process object. More...
 
void SetProgress (double)
 SetProgress is deprecated. More...
 
void UpdateProgress (double amount)
 Update the progress of the process object. More...
 
void SetProgressShiftScale (double shift, double scale)
 Specify the shift and scale values to use to apply to the progress amount when UpdateProgress is called. More...
 
virtual double GetProgressShift ()
 
virtual double GetProgressScale ()
 
void SetProgressText (const char *ptext)
 Set the current text message associated with the progress state. More...
 
virtual char * GetProgressText ()
 
virtual unsigned long GetErrorCode ()
 The error code contains a possible error that occurred while reading or writing the file. More...
 
virtual void SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, const char *name)
 Set the input data arrays that this algorithm will process. More...
 
virtual void SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, int fieldAttributeType)
 
virtual void SetInputArrayToProcess (int idx, vtkInformation *info)
 
virtual void SetInputArrayToProcess (int idx, int port, int connection, const char *fieldAssociation, const char *attributeTypeorName)
 String based versions of SetInputArrayToProcess(). More...
 
vtkInformationGetInputArrayInformation (int idx)
 Get the info object for the specified input array to this algorithm. More...
 
void RemoveAllInputs ()
 Remove all the input data. More...
 
vtkDataObjectGetOutputDataObject (int port)
 Get the data object that will contain the algorithm output for the given port. More...
 
vtkDataObjectGetInputDataObject (int port, int connection)
 Get the data object that will contain the algorithm input for the given port and given connection. More...
 
virtual void SetInputConnection (int port, vtkAlgorithmOutput *input)
 Set the connection for the given input port index. More...
 
virtual void SetInputConnection (vtkAlgorithmOutput *input)
 
virtual void AddInputConnection (int port, vtkAlgorithmOutput *input)
 Add a connection to the given input port index. More...
 
virtual void AddInputConnection (vtkAlgorithmOutput *input)
 
virtual void RemoveInputConnection (int port, vtkAlgorithmOutput *input)
 Remove a connection from the given input port index. More...
 
virtual void RemoveInputConnection (int port, int idx)
 Remove a connection given by index idx. More...
 
virtual void RemoveAllInputConnections (int port)
 Removes all input connections. More...
 
virtual void SetInputDataObject (int port, vtkDataObject *data)
 Sets the data-object as an input on the given port index. More...
 
virtual void SetInputDataObject (vtkDataObject *data)
 
virtual void AddInputDataObject (int port, vtkDataObject *data)
 Add the data-object as an input to this given port. More...
 
virtual void AddInputDataObject (vtkDataObject *data)
 
vtkAlgorithmOutputGetOutputPort (int index)
 Get a proxy object corresponding to the given output port of this algorithm. More...
 
vtkAlgorithmOutputGetOutputPort ()
 
int GetNumberOfInputConnections (int port)
 Get the number of inputs currently connected to a port. More...
 
int GetTotalNumberOfInputConnections ()
 Get the total number of inputs for this algorithm. More...
 
vtkAlgorithmOutputGetInputConnection (int port, int index)
 Get the algorithm output port connected to an input port. More...
 
vtkAlgorithmGetInputAlgorithm (int port, int index, int &algPort)
 Returns the algorithm and the output port index of that algorithm connected to a port-index pair. More...
 
vtkAlgorithmGetInputAlgorithm (int port, int index)
 Returns the algorithm connected to a port-index pair. More...
 
vtkAlgorithmGetInputAlgorithm ()
 Equivalent to GetInputAlgorithm(0, 0). More...
 
vtkExecutiveGetInputExecutive (int port, int index)
 Returns the executive associated with a particular input connection. More...
 
vtkExecutiveGetInputExecutive ()
 Equivalent to GetInputExecutive(0, 0) More...
 
vtkInformationGetInputInformation (int port, int index)
 Return the information object that is associated with a particular input connection. More...
 
vtkInformationGetInputInformation ()
 Equivalent to GetInputInformation(0, 0) More...
 
vtkInformationGetOutputInformation (int port)
 Return the information object that is associated with a particular output port. More...
 
virtual void Update (int port)
 Bring this algorithm's outputs up-to-date. More...
 
virtual void Update ()
 
virtual vtkTypeBool Update (int port, vtkInformationVector *requests)
 This method enables the passing of data requests to the algorithm to be used during execution (in addition to bringing a particular port up-to-date). More...
 
virtual vtkTypeBool Update (vtkInformation *requests)
 Convenience method to update an algorithm after passing requests to its first output port. More...
 
virtual int UpdatePiece (int piece, int numPieces, int ghostLevels, const int extents[6]=nullptr)
 Convenience method to update an algorithm after passing requests to its first output port. More...
 
virtual int UpdateExtent (const int extents[6])
 Convenience method to update an algorithm after passing requests to its first output port. More...
 
virtual int UpdateTimeStep (double time, int piece=-1, int numPieces=1, int ghostLevels=0, const int extents[6]=nullptr)
 Convenience method to update an algorithm after passing requests to its first output port. More...
 
virtual void UpdateInformation ()
 Bring the algorithm's information up-to-date. More...
 
virtual void UpdateDataObject ()
 Create output object(s). More...
 
virtual void PropagateUpdateExtent ()
 Propagate meta-data upstream. More...
 
virtual void UpdateWholeExtent ()
 Bring this algorithm's outputs up-to-date. More...
 
void ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
 Convenience routine to convert from a linear ordering of input connections to a port/connection pair. More...
 
virtual void SetReleaseDataFlag (int)
 Turn release data flag on or off for all output ports. More...
 
virtual int GetReleaseDataFlag ()
 
void ReleaseDataFlagOn ()
 
void ReleaseDataFlagOff ()
 
int UpdateExtentIsEmpty (vtkInformation *pinfo, vtkDataObject *output)
 This detects when the UpdateExtent will generate no data This condition is satisfied when the UpdateExtent has zero volume (0,-1,...) or the UpdateNumberOfPieces is 0. More...
 
int UpdateExtentIsEmpty (vtkInformation *pinfo, int extentType)
 
intGetUpdateExtent ()
 These functions return the update extent for output ports that use 3D extents. More...
 
intGetUpdateExtent (int port)
 
void GetUpdateExtent (int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
 
void GetUpdateExtent (int port, int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
 
void GetUpdateExtent (int extent[6])
 
void GetUpdateExtent (int port, int extent[6])
 
int GetUpdatePiece ()
 These functions return the update extent for output ports that use piece extents. More...
 
int GetUpdatePiece (int port)
 
int GetUpdateNumberOfPieces ()
 
int GetUpdateNumberOfPieces (int port)
 
int GetUpdateGhostLevel ()
 
int GetUpdateGhostLevel (int port)
 
void SetProgressObserver (vtkProgressObserver *)
 If an ProgressObserver is set, the algorithm will report progress through it rather than directly. More...
 
virtual vtkProgressObserverGetProgressObserver ()
 
- Public Member Functions inherited from vtkObject
 vtkBaseTypeMacro (vtkObject, vtkObjectBase)
 
virtual void DebugOn ()
 Turn debugging output on. More...
 
virtual void DebugOff ()
 Turn debugging output off. More...
 
bool GetDebug ()
 Get the value of the debug flag. More...
 
void SetDebug (bool debugFlag)
 Set the value of the debug flag. More...
 
virtual void Modified ()
 Update the modification time for this object. More...
 
virtual vtkMTimeType GetMTime ()
 Return this object's modified time. More...
 
unsigned long AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
unsigned long AddObserver (const char *event, vtkCommand *, float priority=0.0f)
 
vtkCommandGetCommand (unsigned long tag)
 
void RemoveObserver (vtkCommand *)
 
void RemoveObservers (unsigned long event, vtkCommand *)
 
void RemoveObservers (const char *event, vtkCommand *)
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 
void RemoveObserver (unsigned long tag)
 
void RemoveObservers (unsigned long event)
 
void RemoveObservers (const char *event)
 
void RemoveAllObservers ()
 
vtkTypeBool HasObserver (unsigned long event)
 
vtkTypeBool HasObserver (const char *event)
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
 Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
 Allow user to set the AbortFlagOn() with the return value of the callback method. More...
 
int InvokeEvent (unsigned long event, void *callData)
 This method invokes an event and return whether the event was aborted or not. More...
 
int InvokeEvent (const char *event, void *callData)
 
int InvokeEvent (unsigned long event)
 
int InvokeEvent (const char *event)
 
- Public Member Functions inherited from vtkObjectBase
const char * GetClassName () const
 Return the class name as a string. More...
 
virtual void Delete ()
 Delete a VTK object. More...
 
virtual void FastDelete ()
 Delete a reference to this object. More...
 
void InitializeObjectBase ()
 
void Print (ostream &os)
 Print an object to an ostream. More...
 
virtual void PrintHeader (ostream &os, vtkIndent indent)
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 
int GetReferenceCount ()
 Return the current reference count of this object. More...
 
void SetReferenceCount (int)
 Sets the reference count. More...
 
void PrintRevisions (ostream &)
 Legacy. More...
 

Static Public Member Functions

static vtkTypeBool IsTypeOf (const char *type)
 
static vtkQuadricDecimationSafeDownCast (vtkObjectBase *o)
 
static vtkQuadricDecimationNew ()
 
- Static Public Member Functions inherited from vtkPolyDataAlgorithm
static vtkPolyDataAlgorithmNew ()
 
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkPolyDataAlgorithmSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkAlgorithm
static vtkAlgorithmNew ()
 
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkAlgorithmSafeDownCast (vtkObjectBase *o)
 
static vtkInformationIntegerKeyINPUT_IS_OPTIONAL ()
 Keys used to specify input port requirements. More...
 
static vtkInformationIntegerKeyINPUT_IS_REPEATABLE ()
 
static vtkInformationInformationVectorKeyINPUT_REQUIRED_FIELDS ()
 
static vtkInformationStringVectorKeyINPUT_REQUIRED_DATA_TYPE ()
 
static vtkInformationInformationVectorKeyINPUT_ARRAYS_TO_PROCESS ()
 
static vtkInformationIntegerKeyINPUT_PORT ()
 
static vtkInformationIntegerKeyINPUT_CONNECTION ()
 
static vtkInformationIntegerKeyCAN_PRODUCE_SUB_EXTENT ()
 This key tells the executive that a particular output port is capable of producing an arbitrary subextent of the whole extent. More...
 
static vtkInformationIntegerKeyCAN_HANDLE_PIECE_REQUEST ()
 Key that tells the pipeline that a particular algorithm can or cannot handle piece request. More...
 
static void SetDefaultExecutivePrototype (vtkExecutive *proto)
 If the DefaultExecutivePrototype is set, a copy of it is created in CreateDefaultExecutive() using NewInstance(). More...
 
- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 
static void BreakOnError ()
 This method is called when vtkErrorMacro executes. More...
 
static void SetGlobalWarningDisplay (int val)
 This is a global flag that controls whether any debug, warning or error messages are displayed. More...
 
static void GlobalWarningDisplayOn ()
 
static void GlobalWarningDisplayOff ()
 
static int GetGlobalWarningDisplay ()
 
- Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool IsTypeOf (const char *name)
 Return 1 if this class type is the same type of (or a subclass of) the named class. More...
 
static vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkQuadricDecimation ()
 
 ~vtkQuadricDecimation () override
 
int RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
 This is called by the superclass. More...
 
int CollapseEdge (vtkIdType pt0Id, vtkIdType pt1Id)
 Do the dirty work of eliminating the edge; return the number of triangles deleted. More...
 
void InitializeQuadrics (vtkIdType numPts)
 Compute quadric for all vertices. More...
 
void AddBoundaryConstraints (void)
 Free boundary edges are weighted. More...
 
void ComputeQuadric (vtkIdType pointId)
 Compute quadric for this vertex. More...
 
void AddQuadric (vtkIdType oldPtId, vtkIdType newPtId)
 Add the quadrics for these 2 points since the edge between them has been collapsed. More...
 
double ComputeCost (vtkIdType edgeId, double *x)
 Compute cost for contracting this edge and the point that gives us this cost. More...
 
double ComputeCost2 (vtkIdType edgeId, double *x)
 
void FindAffectedEdges (vtkIdType p1Id, vtkIdType p2Id, vtkIdList *edges)
 Find all edges that will have an endpoint change ids because of an edge collapse. More...
 
vtkIdType GetEdgeCellId (vtkIdType p1Id, vtkIdType p2Id)
 Find a cell that uses this edge. More...
 
int IsGoodPlacement (vtkIdType pt0Id, vtkIdType pt1Id, const double *x)
 
int TrianglePlaneCheck (const double t0[3], const double t1[3], const double t2[3], const double *x)
 
void ComputeNumberOfComponents (void)
 
void UpdateEdgeData (vtkIdType ptoId, vtkIdType pt1Id)
 
void SetPointAttributeArray (vtkIdType ptId, const double *x)
 Helper function to set and get the point and it's attributes as an array. More...
 
void GetPointAttributeArray (vtkIdType ptId, double *x)
 
void GetAttributeComponents ()
 Find out how many components there are for each attribute for this poly data. More...
 
- Protected Member Functions inherited from vtkPolyDataAlgorithm
 vtkPolyDataAlgorithm ()
 
 ~vtkPolyDataAlgorithm () override
 
virtual int RequestInformation (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
 
virtual int RequestUpdateExtent (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
 This is called by the superclass. More...
 
int FillOutputPortInformation (int port, vtkInformation *info) override
 Fill the output port information objects for this algorithm. More...
 
int FillInputPortInformation (int port, vtkInformation *info) override
 Fill the input port information objects for this algorithm. More...
 
- Protected Member Functions inherited from vtkAlgorithm
 vtkAlgorithm ()
 
 ~vtkAlgorithm () override
 
virtual void SetNumberOfInputPorts (int n)
 Set the number of input ports used by the algorithm. More...
 
virtual void SetNumberOfOutputPorts (int n)
 Set the number of output ports provided by the algorithm. More...
 
int InputPortIndexInRange (int index, const char *action)
 
int OutputPortIndexInRange (int index, const char *action)
 
int GetInputArrayAssociation (int idx, vtkInformationVector **inputVector)
 Get the assocition of the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...
 
int GetInputArrayAssociation (int idx, int connection, vtkInformationVector **inputVector)
 Filters that have multiple connections on one port can use this signature. More...
 
int GetInputArrayAssociation (int idx, vtkDataObject *input)
 
vtkDataArrayGetInputArrayToProcess (int idx, vtkInformationVector **inputVector)
 Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...
 
vtkDataArrayGetInputArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
 
vtkDataArrayGetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
 Filters that have multiple connections on one port can use this signature. More...
 
vtkDataArrayGetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
 
vtkDataArrayGetInputArrayToProcess (int idx, vtkDataObject *input)
 
vtkDataArrayGetInputArrayToProcess (int idx, vtkDataObject *input, int &association)
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector)
 Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
 Filters that have multiple connections on one port can use this signature. More...
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, vtkDataObject *input)
 
vtkAbstractArrayGetInputAbstractArrayToProcess (int idx, vtkDataObject *input, int &association)
 
vtkInformationGetInputArrayFieldInformation (int idx, vtkInformationVector **inputVector)
 This method takes in an index (as specified in SetInputArrayToProcess) and a pipeline information vector. More...
 
virtual vtkExecutiveCreateDefaultExecutive ()
 Create a default executive. More...
 
virtual void SetErrorCode (unsigned long)
 The error code contains a possible error that occurred while reading or writing the file. More...
 
void ReportReferences (vtkGarbageCollector *) override
 
virtual void SetNthInputConnection (int port, int index, vtkAlgorithmOutput *input)
 Replace the Nth connection on the given input port. More...
 
virtual void SetNumberOfInputConnections (int port, int n)
 Set the number of input connections on the given input port. More...
 
void SetInputDataInternal (int port, vtkDataObject *input)
 These methods are used by subclasses to implement methods to set data objects directly as input. More...
 
void AddInputDataInternal (int port, vtkDataObject *input)
 
- Protected Member Functions inherited from vtkObject
 vtkObject ()
 
 ~vtkObject () override
 
void RegisterInternal (vtkObjectBase *, vtkTypeBool check) override
 
void UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override
 
void InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=nullptr)
 These methods allow a command to exclusively grab all events. More...
 
void InternalReleaseFocus ()
 
- Protected Member Functions inherited from vtkObjectBase
 vtkObjectBase ()
 
virtual ~vtkObjectBase ()
 
virtual void CollectRevisions (ostream &)
 
 vtkObjectBase (const vtkObjectBase &)
 
void operator= (const vtkObjectBase &)
 

Protected Attributes

double TargetReduction
 
double ActualReduction
 
vtkTypeBool AttributeErrorMetric
 
vtkTypeBool VolumePreservation
 
vtkTypeBool ScalarsAttribute
 
vtkTypeBool VectorsAttribute
 
vtkTypeBool NormalsAttribute
 
vtkTypeBool TCoordsAttribute
 
vtkTypeBool TensorsAttribute
 
double ScalarsWeight
 
double VectorsWeight
 
double NormalsWeight
 
double TCoordsWeight
 
double TensorsWeight
 
int NumberOfEdgeCollapses
 
vtkEdgeTableEdges
 
vtkIdListEndPoint1List
 
vtkIdListEndPoint2List
 
vtkPriorityQueueEdgeCosts
 
vtkDoubleArrayTargetPoints
 
int NumberOfComponents
 
vtkPolyDataMesh
 
ErrorQuadricErrorQuadrics
 
doubleVolumeConstraints
 
int AttributeComponents [6]
 
double AttributeScale [6]
 
vtkIdListCollapseCellIds
 
doubleTempX
 
doubleTempQuad
 
doubleTempB
 
double ** TempA
 
doubleTempData
 
- Protected Attributes inherited from vtkAlgorithm
vtkInformationInformation
 
unsigned long ErrorCode
 
double Progress
 
char * ProgressText
 
vtkProgressObserverProgressObserver
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
- Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t > ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

Additional Inherited Members

- Public Attributes inherited from vtkAlgorithm
vtkTypeBool AbortExecute
 
- Static Protected Member Functions inherited from vtkAlgorithm
static vtkInformationIntegerKeyPORT_REQUIREMENTS_FILLED ()
 
- Static Protected Attributes inherited from vtkAlgorithm
static vtkExecutiveDefaultExecutivePrototype
 

Detailed Description

reduce the number of triangles in a mesh

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

The algorithm is based on repeated edge collapses until the requested mesh reduction is achieved. Edges are placed in a priority queue based on the "cost" to delete the edge. The cost is an approximate measure of error (distance to the original surface)–described by the so-called quadric error measure. The quadric error measure is associated with each vertex of the mesh and represents a matrix of planes incident on that vertex. The distance of the planes to the vertex is the error in the position of the vertex (originally the vertex error iz zero). As edges are deleted, the quadric error measure associated with the two end points of the edge are summed (this combines the plane equations) and an optimal collapse point can be computed. Edges connected to the collapse point are then reinserted into the queue after computing the new cost to delete them. The process continues until the desired reduction level is reached or topological constraints prevent further reduction. Note that this basic algorithm can be extended to higher dimensions by taking into account variation in attributes (i.e., scalars, vectors, and so on).

This paper is based on the work of Garland and Heckbert who first presented the quadric error measure at Siggraph '97 "Surface Simplification Using Quadric Error Metrics". For details of the algorithm Michael Garland's Ph.D. thesis is also recommended. Hughues Hoppe's Vis '99 paper, "New Quadric Metric for Simplifying Meshes with Appearance Attributes" is also a good take on the subject especially as it pertains to the error metric applied to attributes.

Thanks:
Thanks to Bradley Lowekamp of the National Library of Medicine/NIH for contributing this class.
Tests:
vtkQuadricDecimation (Tests)

Definition at line 71 of file vtkQuadricDecimation.h.

Member Typedef Documentation

◆ Superclass

Definition at line 74 of file vtkQuadricDecimation.h.

Constructor & Destructor Documentation

◆ vtkQuadricDecimation()

vtkQuadricDecimation::vtkQuadricDecimation ( )
protected

◆ ~vtkQuadricDecimation()

vtkQuadricDecimation::~vtkQuadricDecimation ( )
overrideprotected

Member Function Documentation

◆ IsTypeOf()

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

◆ IsA()

virtual vtkTypeBool vtkQuadricDecimation::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 vtkQuadricDecimation* vtkQuadricDecimation::SafeDownCast ( vtkObjectBase o)
static

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkQuadricDecimation::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkPolyDataAlgorithm.

◆ NewInstance()

vtkQuadricDecimation* vtkQuadricDecimation::NewInstance ( ) const

◆ PrintSelf()

void vtkQuadricDecimation::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 vtkPolyDataAlgorithm.

◆ New()

static vtkQuadricDecimation* vtkQuadricDecimation::New ( )
static

◆ SetTargetReduction()

virtual void vtkQuadricDecimation::SetTargetReduction ( double  )
virtual

Set/Get the desired reduction (expressed as a fraction of the original number of triangles).

The actual reduction may be less depending on triangulation and topological constraints.

◆ GetTargetReduction()

virtual double vtkQuadricDecimation::GetTargetReduction ( )
virtual

◆ SetAttributeErrorMetric()

virtual void vtkQuadricDecimation::SetAttributeErrorMetric ( vtkTypeBool  )
virtual

Decide whether to include data attributes in the error metric.

If off, then only geometric error is used to control the decimation. By default the attribute errors are off.

◆ GetAttributeErrorMetric()

virtual vtkTypeBool vtkQuadricDecimation::GetAttributeErrorMetric ( )
virtual

◆ AttributeErrorMetricOn()

virtual void vtkQuadricDecimation::AttributeErrorMetricOn ( )
virtual

◆ AttributeErrorMetricOff()

virtual void vtkQuadricDecimation::AttributeErrorMetricOff ( )
virtual

◆ SetVolumePreservation()

virtual void vtkQuadricDecimation::SetVolumePreservation ( vtkTypeBool  )
virtual

Decide whether to activate volume preservation which greatly reduces errors in triangle normal direction.

If off, volume preservation is disabled and if AttributeErrorMetric is active, these errors can be large. By default VolumePreservation is off the attribute errors are off.

◆ GetVolumePreservation()

virtual vtkTypeBool vtkQuadricDecimation::GetVolumePreservation ( )
virtual

◆ VolumePreservationOn()

virtual void vtkQuadricDecimation::VolumePreservationOn ( )
virtual

◆ VolumePreservationOff()

virtual void vtkQuadricDecimation::VolumePreservationOff ( )
virtual

◆ SetScalarsAttribute()

virtual void vtkQuadricDecimation::SetScalarsAttribute ( vtkTypeBool  )
virtual

If attribute errors are to be included in the metric (i.e., AttributeErrorMetric is on), then the following flags control which attributes are to be included in the error calculation.

By default all of these are on.

◆ GetScalarsAttribute()

virtual vtkTypeBool vtkQuadricDecimation::GetScalarsAttribute ( )
virtual

◆ ScalarsAttributeOn()

virtual void vtkQuadricDecimation::ScalarsAttributeOn ( )
virtual

◆ ScalarsAttributeOff()

virtual void vtkQuadricDecimation::ScalarsAttributeOff ( )
virtual

◆ SetVectorsAttribute()

virtual void vtkQuadricDecimation::SetVectorsAttribute ( vtkTypeBool  )
virtual

◆ GetVectorsAttribute()

virtual vtkTypeBool vtkQuadricDecimation::GetVectorsAttribute ( )
virtual

◆ VectorsAttributeOn()

virtual void vtkQuadricDecimation::VectorsAttributeOn ( )
virtual

◆ VectorsAttributeOff()

virtual void vtkQuadricDecimation::VectorsAttributeOff ( )
virtual

◆ SetNormalsAttribute()

virtual void vtkQuadricDecimation::SetNormalsAttribute ( vtkTypeBool  )
virtual

◆ GetNormalsAttribute()

virtual vtkTypeBool vtkQuadricDecimation::GetNormalsAttribute ( )
virtual

◆ NormalsAttributeOn()

virtual void vtkQuadricDecimation::NormalsAttributeOn ( )
virtual

◆ NormalsAttributeOff()

virtual void vtkQuadricDecimation::NormalsAttributeOff ( )
virtual

◆ SetTCoordsAttribute()

virtual void vtkQuadricDecimation::SetTCoordsAttribute ( vtkTypeBool  )
virtual

◆ GetTCoordsAttribute()

virtual vtkTypeBool vtkQuadricDecimation::GetTCoordsAttribute ( )
virtual

◆ TCoordsAttributeOn()

virtual void vtkQuadricDecimation::TCoordsAttributeOn ( )
virtual

◆ TCoordsAttributeOff()

virtual void vtkQuadricDecimation::TCoordsAttributeOff ( )
virtual

◆ SetTensorsAttribute()

virtual void vtkQuadricDecimation::SetTensorsAttribute ( vtkTypeBool  )
virtual

◆ GetTensorsAttribute()

virtual vtkTypeBool vtkQuadricDecimation::GetTensorsAttribute ( )
virtual

◆ TensorsAttributeOn()

virtual void vtkQuadricDecimation::TensorsAttributeOn ( )
virtual

◆ TensorsAttributeOff()

virtual void vtkQuadricDecimation::TensorsAttributeOff ( )
virtual

◆ SetScalarsWeight()

virtual void vtkQuadricDecimation::SetScalarsWeight ( double  )
virtual

Set/Get the scaling weight contribution of the attribute.

These values are used to weight the contribution of the attributes towards the error metric.

◆ SetVectorsWeight()

virtual void vtkQuadricDecimation::SetVectorsWeight ( double  )
virtual

◆ SetNormalsWeight()

virtual void vtkQuadricDecimation::SetNormalsWeight ( double  )
virtual

◆ SetTCoordsWeight()

virtual void vtkQuadricDecimation::SetTCoordsWeight ( double  )
virtual

◆ SetTensorsWeight()

virtual void vtkQuadricDecimation::SetTensorsWeight ( double  )
virtual

◆ GetScalarsWeight()

virtual double vtkQuadricDecimation::GetScalarsWeight ( )
virtual

◆ GetVectorsWeight()

virtual double vtkQuadricDecimation::GetVectorsWeight ( )
virtual

◆ GetNormalsWeight()

virtual double vtkQuadricDecimation::GetNormalsWeight ( )
virtual

◆ GetTCoordsWeight()

virtual double vtkQuadricDecimation::GetTCoordsWeight ( )
virtual

◆ GetTensorsWeight()

virtual double vtkQuadricDecimation::GetTensorsWeight ( )
virtual

◆ GetActualReduction()

virtual double vtkQuadricDecimation::GetActualReduction ( )
virtual

Get the actual reduction.

This value is only valid after the filter has executed.

◆ RequestData()

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

This is called by the superclass.

This is the method you should override.

Reimplemented from vtkPolyDataAlgorithm.

◆ CollapseEdge()

int vtkQuadricDecimation::CollapseEdge ( vtkIdType  pt0Id,
vtkIdType  pt1Id 
)
protected

Do the dirty work of eliminating the edge; return the number of triangles deleted.

◆ InitializeQuadrics()

void vtkQuadricDecimation::InitializeQuadrics ( vtkIdType  numPts)
protected

Compute quadric for all vertices.

◆ AddBoundaryConstraints()

void vtkQuadricDecimation::AddBoundaryConstraints ( void  )
protected

Free boundary edges are weighted.

◆ ComputeQuadric()

void vtkQuadricDecimation::ComputeQuadric ( vtkIdType  pointId)
protected

Compute quadric for this vertex.

◆ AddQuadric()

void vtkQuadricDecimation::AddQuadric ( vtkIdType  oldPtId,
vtkIdType  newPtId 
)
protected

Add the quadrics for these 2 points since the edge between them has been collapsed.

◆ ComputeCost()

double vtkQuadricDecimation::ComputeCost ( vtkIdType  edgeId,
double x 
)
protected

Compute cost for contracting this edge and the point that gives us this cost.

◆ ComputeCost2()

double vtkQuadricDecimation::ComputeCost2 ( vtkIdType  edgeId,
double x 
)
protected

◆ FindAffectedEdges()

void vtkQuadricDecimation::FindAffectedEdges ( vtkIdType  p1Id,
vtkIdType  p2Id,
vtkIdList edges 
)
protected

Find all edges that will have an endpoint change ids because of an edge collapse.

p1Id and p2Id are the endpoints of the edge. p2Id is the pointId being removed.

◆ GetEdgeCellId()

vtkIdType vtkQuadricDecimation::GetEdgeCellId ( vtkIdType  p1Id,
vtkIdType  p2Id 
)
protected

Find a cell that uses this edge.

◆ IsGoodPlacement()

int vtkQuadricDecimation::IsGoodPlacement ( vtkIdType  pt0Id,
vtkIdType  pt1Id,
const double x 
)
protected

◆ TrianglePlaneCheck()

int vtkQuadricDecimation::TrianglePlaneCheck ( const double  t0[3],
const double  t1[3],
const double  t2[3],
const double x 
)
protected

◆ ComputeNumberOfComponents()

void vtkQuadricDecimation::ComputeNumberOfComponents ( void  )
protected

◆ UpdateEdgeData()

void vtkQuadricDecimation::UpdateEdgeData ( vtkIdType  ptoId,
vtkIdType  pt1Id 
)
protected

◆ SetPointAttributeArray()

void vtkQuadricDecimation::SetPointAttributeArray ( vtkIdType  ptId,
const double x 
)
protected

Helper function to set and get the point and it's attributes as an array.

◆ GetPointAttributeArray()

void vtkQuadricDecimation::GetPointAttributeArray ( vtkIdType  ptId,
double x 
)
protected

◆ GetAttributeComponents()

void vtkQuadricDecimation::GetAttributeComponents ( )
protected

Find out how many components there are for each attribute for this poly data.

Member Data Documentation

◆ TargetReduction

double vtkQuadricDecimation::TargetReduction
protected

Definition at line 236 of file vtkQuadricDecimation.h.

◆ ActualReduction

double vtkQuadricDecimation::ActualReduction
protected

Definition at line 237 of file vtkQuadricDecimation.h.

◆ AttributeErrorMetric

vtkTypeBool vtkQuadricDecimation::AttributeErrorMetric
protected

Definition at line 238 of file vtkQuadricDecimation.h.

◆ VolumePreservation

vtkTypeBool vtkQuadricDecimation::VolumePreservation
protected

Definition at line 239 of file vtkQuadricDecimation.h.

◆ ScalarsAttribute

vtkTypeBool vtkQuadricDecimation::ScalarsAttribute
protected

Definition at line 241 of file vtkQuadricDecimation.h.

◆ VectorsAttribute

vtkTypeBool vtkQuadricDecimation::VectorsAttribute
protected

Definition at line 242 of file vtkQuadricDecimation.h.

◆ NormalsAttribute

vtkTypeBool vtkQuadricDecimation::NormalsAttribute
protected

Definition at line 243 of file vtkQuadricDecimation.h.

◆ TCoordsAttribute

vtkTypeBool vtkQuadricDecimation::TCoordsAttribute
protected

Definition at line 244 of file vtkQuadricDecimation.h.

◆ TensorsAttribute

vtkTypeBool vtkQuadricDecimation::TensorsAttribute
protected

Definition at line 245 of file vtkQuadricDecimation.h.

◆ ScalarsWeight

double vtkQuadricDecimation::ScalarsWeight
protected

Definition at line 247 of file vtkQuadricDecimation.h.

◆ VectorsWeight

double vtkQuadricDecimation::VectorsWeight
protected

Definition at line 248 of file vtkQuadricDecimation.h.

◆ NormalsWeight

double vtkQuadricDecimation::NormalsWeight
protected

Definition at line 249 of file vtkQuadricDecimation.h.

◆ TCoordsWeight

double vtkQuadricDecimation::TCoordsWeight
protected

Definition at line 250 of file vtkQuadricDecimation.h.

◆ TensorsWeight

double vtkQuadricDecimation::TensorsWeight
protected

Definition at line 251 of file vtkQuadricDecimation.h.

◆ NumberOfEdgeCollapses

int vtkQuadricDecimation::NumberOfEdgeCollapses
protected

Definition at line 253 of file vtkQuadricDecimation.h.

◆ Edges

vtkEdgeTable* vtkQuadricDecimation::Edges
protected

Definition at line 254 of file vtkQuadricDecimation.h.

◆ EndPoint1List

vtkIdList* vtkQuadricDecimation::EndPoint1List
protected

Definition at line 255 of file vtkQuadricDecimation.h.

◆ EndPoint2List

vtkIdList* vtkQuadricDecimation::EndPoint2List
protected

Definition at line 256 of file vtkQuadricDecimation.h.

◆ EdgeCosts

vtkPriorityQueue* vtkQuadricDecimation::EdgeCosts
protected

Definition at line 257 of file vtkQuadricDecimation.h.

◆ TargetPoints

vtkDoubleArray* vtkQuadricDecimation::TargetPoints
protected

Definition at line 258 of file vtkQuadricDecimation.h.

◆ NumberOfComponents

int vtkQuadricDecimation::NumberOfComponents
protected

Definition at line 259 of file vtkQuadricDecimation.h.

◆ Mesh

vtkPolyData* vtkQuadricDecimation::Mesh
protected

Definition at line 260 of file vtkQuadricDecimation.h.

◆ ErrorQuadrics

ErrorQuadric* vtkQuadricDecimation::ErrorQuadrics
protected

Definition at line 269 of file vtkQuadricDecimation.h.

◆ VolumeConstraints

double* vtkQuadricDecimation::VolumeConstraints
protected

Definition at line 272 of file vtkQuadricDecimation.h.

◆ AttributeComponents

int vtkQuadricDecimation::AttributeComponents[6]
protected

Definition at line 273 of file vtkQuadricDecimation.h.

◆ AttributeScale

double vtkQuadricDecimation::AttributeScale[6]
protected

Definition at line 274 of file vtkQuadricDecimation.h.

◆ CollapseCellIds

vtkIdList* vtkQuadricDecimation::CollapseCellIds
protected

Definition at line 277 of file vtkQuadricDecimation.h.

◆ TempX

double* vtkQuadricDecimation::TempX
protected

Definition at line 278 of file vtkQuadricDecimation.h.

◆ TempQuad

double* vtkQuadricDecimation::TempQuad
protected

Definition at line 279 of file vtkQuadricDecimation.h.

◆ TempB

double* vtkQuadricDecimation::TempB
protected

Definition at line 280 of file vtkQuadricDecimation.h.

◆ TempA

double** vtkQuadricDecimation::TempA
protected

Definition at line 281 of file vtkQuadricDecimation.h.

◆ TempData

double* vtkQuadricDecimation::TempData
protected

Definition at line 282 of file vtkQuadricDecimation.h.


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