helper class to perform cell tessellation More...

#include <vtkSimpleCellTessellator.h>

Inheritance diagram for vtkSimpleCellTessellator:

Collaboration diagram for vtkSimpleCellTessellator:

Public Types
typedef vtkGenericCellTessellator	Superclass

Public Types inherited from vtkGenericCellTessellator
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...

vtkSimpleCellTessellator *	NewInstance () const

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

void	TessellateFace (vtkGenericAdaptorCell cell, vtkGenericAttributeCollection att, vtkIdType index, vtkDoubleArray points, vtkCellArray cellArray, vtkPointData *internalPd) override
	Tessellate a face of a 3D `cell'. More...

void	Tessellate (vtkGenericAdaptorCell cell, vtkGenericAttributeCollection att, vtkDoubleArray points, vtkCellArray cellArray, vtkPointData *internalPd) override
	Tessellate a 3D `cell'. More...

void	Triangulate (vtkGenericAdaptorCell cell, vtkGenericAttributeCollection att, vtkDoubleArray points, vtkCellArray cellArray, vtkPointData *internalPd) override
	Triangulate a 2D `cell'. More...

void	Reset ()
	Reset the output for repeated use of this class. More...

void	Initialize (vtkGenericDataSet *ds) override
	Initialize the tessellator with a data set `ds'. More...

int	GetFixedSubdivisions ()
	Return the number of fixed subdivisions. More...

int	GetMaxSubdivisionLevel ()
	Return the maximum level of subdivision. More...

int	GetMaxAdaptiveSubdivisions ()
	Return the maximum number of adaptive subdivisions. More...

void	SetFixedSubdivisions (int level)
	Set the number of fixed subdivisions. More...

void	SetMaxSubdivisionLevel (int level)
	Set the maximum level of subdivision. More...

void	SetSubdivisionLevels (int fixed, int maxLevel)
	Set both the number of fixed subdivisions and the maximum level of subdivisions. More...


virtual vtkGenericAdaptorCell *	GetGenericCell ()
	Get the higher order cell in order to access the evaluation function. More...

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

void	InitErrorMetrics (vtkGenericDataSet *ds)
	Init the error metric with the dataset. More...

void	GetMaxErrors (double *errors)
	Get the maximum error measured after the fixed subdivision. More...

virtual void	SetErrorMetrics (vtkCollection *someErrorMetrics)
	Specify the list of error metrics used to decide if an edge has to be split or not. More...

virtual vtkCollection *	GetErrorMetrics ()
	Specify the list of error metrics used to decide if an edge has to be split or not. More...

virtual int	GetMeasurement ()
	If true, measure the quality of the fixed subdivision. More...

virtual void	SetMeasurement (int)
	If true, measure the quality of the fixed subdivision. More...

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...

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

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

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

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

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

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

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

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

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

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)
	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, 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)
	This method invokes an event and return whether the event was aborted or not. More...

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

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

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

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

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

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

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

Static Public Member Functions
static vtkSimpleCellTessellator *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkSimpleCellTessellator *	SafeDownCast (vtkObjectBase *o)

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

static vtkGenericCellTessellator *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

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

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

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

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

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

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

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

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkSimpleCellTessellator ()

	~vtkSimpleCellTessellator () override

void	CopyPoint (vtkIdType pointId)
	Extract point `pointId' from the edge table to the output point and output point data. More...

void	InsertEdgesIntoEdgeTable (vtkTriangleTile &tri)

void	RemoveEdgesFromEdgeTable (vtkTriangleTile &tri)

void	InsertPointsIntoEdgeTable (vtkTriangleTile &tri)

void	InsertEdgesIntoEdgeTable (vtkTetraTile &tetra)

void	RemoveEdgesFromEdgeTable (vtkTetraTile &tetra)

void	InitTetraTile (vtkTetraTile &root, vtkIdType localIds, vtkIdType ids, int edgeIds, int faceIds)
	Initialize `root' with the sub-tetra defined by the `localIds' points on the complex cell, `ids' are the global ids over the mesh of those points. More...

void	TriangulateTriangle (vtkGenericAdaptorCell cell, vtkIdType localIds, vtkIdType ids, int edgeIds, vtkGenericAttributeCollection att, vtkDoubleArray points, vtkCellArray cellArray, vtkPointData internalPd)
	Triangulate a triangle of `cell'. More...

void	AllocateScalars (int size)
	Allocate some memory if Scalars does not exists or is smaller than size. More...

int	FindEdgeReferenceCount (double p1[3], double p2[3], vtkIdType &e1, vtkIdType &e2)

int	GetNumberOfCellsUsingFace (int faceId)

int	GetNumberOfCellsUsingEdge (int edgeId)

int	IsEdgeOnFace (double p1[3], double p2[3])
	Is the edge defined by vertices (`p1',`p2') in parametric coordinates on some edge of the original tetrahedron? If yes return on which edge it is, else return -1. More...

int	FindEdgeParent2D (double p1[3], double p2[3], int &localId)
	Return 1 if the parent of edge defined by vertices (`p1',`p2') in parametric coordinates, is an edge; 3 if there is no parent (the edge is inside). More...

int	FindEdgeParent (double p1[3], double p2[3], int &localId)
	Return 1 if the parent of edge defined by vertices (`p1',`p2') in parametric coordinates, is an edge; 2 if the parent is a face, 3 if there is no parent (the edge is inside). More...

void	AllocatePointIds (int size)
	Allocate some memory if PointIds does not exist or is smaller than size. More...

int	FacesAreEqual (int *originalFace, int face[3])
	Are the faces `originalFace' and `face' equal? The result is independent from any order or orientation. More...

Protected Member Functions inherited from vtkGenericCellTessellator
	vtkGenericCellTessellator ()

	~vtkGenericCellTessellator () override

int	RequiresEdgeSubdivision (double left, double mid, double *right, double alpha)
	Does the edge need to be subdivided according to at least one error metric? The edge is defined by its `leftPoint' and its `rightPoint'. More...

virtual void	UpdateMaxError (double leftPoint, double midPoint, double *rightPoint, double alpha)
	Update the max error of each error metric according to the error at the mid-point. More...

void	ResetMaxErrors ()
	Reset the maximal error of each error metric. More...

void	SetGenericCell (vtkGenericAdaptorCell *cell)
	Send the current cell to error metrics. More...

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 ()
	These methods allow a command to exclusively grab all events. More...

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
vtkGenericEdgeTable *	EdgeTable
	HashTable instead of vtkPointLocator. More...

vtkGenericAdaptorCell *	GenericCell
	To access the higher order cell from third party library. More...

double *	Scalars
	Scalar buffer used to save the interpolate values of the attributes The capacity is at least the number of components of the attribute collection ot the current cell. More...

int	ScalarsCapacity

int	PointOffset
	Number of double value to skip to go to the next point into Scalars array It is 6+attributeCollection->GetNumberOfComponents() More...

vtkGenericCellIterator *	CellIterator
	Used to iterate over edges boundaries in GetNumberOfCellsUsingEdges() More...

vtkGenericAttributeCollection *	AttributeCollection
	To access the higher order field from third party library. More...

vtkIdType	NumberOfPoints
	Number of points in the dataset to be tessellated. More...

int	FixedSubdivisions

int	MaxSubdivisionLevel

int	CurrentSubdivisionLevel

int *	EdgeIds
	For each edge (6) of the sub-tetra, there is the id of the original edge or -1 if the edge is not an original edge. More...

int *	FaceIds
	For each face (4) of the sub-tetra, there is the id of the original face or -1 if the face is not an original face. More...

vtkOrderedTriangulator *	Triangulator

vtkCellArray *	Connectivity

vtkPolygon *	Polygon

vtkIdList *	TriangleIds

vtkIdType *	PointIds

int	PointIdsCapacity


vtkDoubleArray *	TessellatePoints
	To avoid New/Delete. More...

vtkCellArray *	TessellateCellArray
	To avoid New/Delete. More...

vtkPointData *	TessellatePointData
	To avoid New/Delete. More...

Protected Attributes inherited from vtkGenericCellTessellator
vtkCollection *	ErrorMetrics
	List of error metrics. More...

vtkGenericDataSet *	DataSet
	Dataset to be tessellated. More...

int	Measurement

double *	MaxErrors

int	MaxErrorsCapacity

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Friends
class	vtkTetraTile

class	vtkTriangleTile

Detailed Description

helper class to perform cell tessellation

vtkSimpleCellTessellator is a helper class to perform adaptive tessellation of particular cell topologies. The major purpose for this class is to transform higher-order cell types (e.g., higher-order finite elements) into linear cells that can then be easily visualized by VTK. This class works in conjunction with the vtkGenericDataSet and vtkGenericAdaptorCell classes.

This algorithm is based on edge subdivision. An error metric along each edge is evaluated, and if the error is greater than some tolerance, the edge is subdivided (as well as all connected 2D and 3D cells). The process repeats until the error metric is satisfied. Since the algorithm is based on edge subdivision it inherently avoid T-junctions.

A significant issue addressed by this algorithm is to insure face compatibility across neigboring cells. That is, diagonals due to face triangulation must match to insure that the mesh is compatible. The algorithm employs a precomputed table to accelerate the tessellation process. The table was generated with the help of vtkOrderedTriangulator the basic idea is that the choice of diagonal is made only by considering the relative value of the point ids.

See also: vtkGenericCellTessellator vtkGenericSubdivisionErrorMetric vtkAttributesErrorMetric vtkGeometricErrorMetric vtkViewDependentErrorMetric

Tests:: vtkSimpleCellTessellator (Tests)

Definition at line 71 of file vtkSimpleCellTessellator.h.

Member Typedef Documentation

typedef vtkGenericCellTessellator vtkSimpleCellTessellator::Superclass

Definition at line 75 of file vtkSimpleCellTessellator.h.

Constructor & Destructor Documentation

vtkSimpleCellTessellator::vtkSimpleCellTessellator ( )

protected

vtkSimpleCellTessellator::~vtkSimpleCellTessellator ( )

overrideprotected

Member Function Documentation

static vtkSimpleCellTessellator* vtkSimpleCellTessellator::New ( )

static

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

static

virtual vtkTypeBool vtkSimpleCellTessellator::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 vtkGenericCellTessellator.

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

static

virtual vtkObjectBase* vtkSimpleCellTessellator::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkGenericCellTessellator.

vtkSimpleCellTessellator* vtkSimpleCellTessellator::NewInstance ( ) const

void vtkSimpleCellTessellator::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 vtkGenericCellTessellator.

virtual vtkGenericAdaptorCell* vtkSimpleCellTessellator::GetGenericCell ( )

virtual

Get the higher order cell in order to access the evaluation function.

void vtkSimpleCellTessellator::TessellateFace	(	vtkGenericAdaptorCell *	cell,
		vtkGenericAttributeCollection *	att,
		vtkIdType	index,
		vtkDoubleArray *	points,
		vtkCellArray *	cellArray,
		vtkPointData *	internalPd
	)

overridevirtual

Tessellate a face of a 3D `cell'.

The face is specified by the index value. The result is a set of smaller linear triangles in `cellArray' with `points' and point data `internalPd'.

Precondition: cell_exists: cell!=0; valid_dimension: cell->GetDimension()==3; valid_index_range: (index>=0) && (index<cell->GetNumberOfBoundaries(2)); att_exists: att!=0; points_exists: points!=0; cellArray_exists: cellArray!=0; internalPd_exists: internalPd!=0

Implements vtkGenericCellTessellator.

void vtkSimpleCellTessellator::Tessellate	(	vtkGenericAdaptorCell *	cell,
		vtkGenericAttributeCollection *	att,
		vtkDoubleArray *	points,
		vtkCellArray *	cellArray,
		vtkPointData *	internalPd
	)

overridevirtual

Tessellate a 3D `cell'.

The result is a set of smaller linear tetrahedra in `cellArray' with `points' and point data `internalPd'.

Precondition: cell_exists: cell!=0; valid_dimension: cell->GetDimension()==3; att_exists: att!=0; points_exists: points!=0; cellArray_exists: cellArray!=0; internalPd_exists: internalPd!=0

Implements vtkGenericCellTessellator.

void vtkSimpleCellTessellator::Triangulate	(	vtkGenericAdaptorCell *	cell,
		vtkGenericAttributeCollection *	att,
		vtkDoubleArray *	points,
		vtkCellArray *	cellArray,
		vtkPointData *	internalPd
	)

overridevirtual

Triangulate a 2D `cell'.

The result is a set of smaller linear triangles in `cellArray' with `points' and point data `internalPd'.

Precondition: cell_exists: cell!=0; valid_dimension: cell->GetDimension()==2; att_exists: att!=0; points_exists: points!=0; cellArray_exists: cellArray!=0; internalPd_exists: internalPd!=0

Implements vtkGenericCellTessellator.

void vtkSimpleCellTessellator::Reset ( )

Reset the output for repeated use of this class.

void vtkSimpleCellTessellator::Initialize ( vtkGenericDataSet * ds )

overridevirtual

Initialize the tessellator with a data set `ds'.

Implements vtkGenericCellTessellator.

int vtkSimpleCellTessellator::GetFixedSubdivisions ( )

Return the number of fixed subdivisions.

It is used to prevent from infinite loop in degenerated cases. For order 3 or higher, if the inflection point is exactly on the mid-point, error metric will not detect that a subdivision is required. 0 means no fixed subdivision: there will be only adaptive subdivisions.

The algorithm first performs `GetFixedSubdivisions' non adaptive subdivisions followed by at most `GetMaxAdaptiveSubdivisions' adaptive subdivisions. Hence, there are at most `GetMaxSubdivisionLevel' subdivisions.

Postcondition: positive_result: result>=0 && result<=GetMaxSubdivisionLevel()

int vtkSimpleCellTessellator::GetMaxSubdivisionLevel ( )

Return the maximum level of subdivision.

It is used to prevent from infinite loop in degenerated cases. For order 3 or higher, if the inflection point is exactly on the mid-point, error metric will not detect that a subdivision is required. 0 means no subdivision, neither fixed nor adaptive.

Postcondition: positive_result: result>=GetFixedSubdivisions()

int vtkSimpleCellTessellator::GetMaxAdaptiveSubdivisions ( )

Return the maximum number of adaptive subdivisions.

Postcondition: valid_result: result==GetMaxSubdivisionLevel()-GetFixedSubdivisions()

void vtkSimpleCellTessellator::SetFixedSubdivisions ( int level )

Set the number of fixed subdivisions.

See GetFixedSubdivisions() for more explanations.

Precondition: positive_level: level>=0 && level<=GetMaxSubdivisionLevel()

Postcondition: is_set: GetFixedSubdivisions()==level

void vtkSimpleCellTessellator::SetMaxSubdivisionLevel ( int level )

Set the maximum level of subdivision.

See GetMaxSubdivisionLevel() for more explanations.

Precondition: positive_level: level>=GetFixedSubdivisions()

Postcondition: is_set: level==GetMaxSubdivisionLevel()

void vtkSimpleCellTessellator::SetSubdivisionLevels	(	int	fixed,
		int	maxLevel
	)

Set both the number of fixed subdivisions and the maximum level of subdivisions.

See GetFixedSubdivisions(), GetMaxSubdivisionLevel() and GetMaxAdaptiveSubdivisions() for more explanations.

Precondition: positive_fixed: fixed>=0; valid_range: fixed<=maxLevel

Postcondition: fixed_is_set: fixed==GetFixedSubdivisions(); maxLevel_is_set: maxLevel==GetMaxSubdivisionLevel()

void vtkSimpleCellTessellator::CopyPoint ( vtkIdType pointId )

protected

Extract point `pointId' from the edge table to the output point and output point data.

void vtkSimpleCellTessellator::InsertEdgesIntoEdgeTable ( vtkTriangleTile & tri )

protected

void vtkSimpleCellTessellator::RemoveEdgesFromEdgeTable ( vtkTriangleTile & tri )

protected

void vtkSimpleCellTessellator::InsertPointsIntoEdgeTable ( vtkTriangleTile & tri )

protected

void vtkSimpleCellTessellator::InsertEdgesIntoEdgeTable ( vtkTetraTile & tetra )

protected

void vtkSimpleCellTessellator::RemoveEdgesFromEdgeTable ( vtkTetraTile & tetra )

protected

void vtkSimpleCellTessellator::InitTetraTile	(	vtkTetraTile &	root,
		vtkIdType *	localIds,
		vtkIdType *	ids,
		int *	edgeIds,
		int *	faceIds
	)

protected

Initialize `root' with the sub-tetra defined by the `localIds' points on the complex cell, `ids' are the global ids over the mesh of those points.

The sub-tetra is also defined by the ids of its edges and of its faces relative to the complex cell. -1 means that the edge or the face of the sub-tetra is not an original edge or face of the complex cell.

Precondition: cell_exists: this->GenericCell!=0; localIds_exists: localIds!=0; localIds_size: sizeof(localIds)==4; ids_exists: ids!=0; ids_size: sizeof(ids)==4; edgeIds_exists: edgeIds!=0; edgeIds_size: sizeof(edgeIds)==6; faceIds_exists: faceIds!=0; faceIds_size: sizeof(faceIds)==4

void vtkSimpleCellTessellator::TriangulateTriangle	(	vtkGenericAdaptorCell *	cell,
		vtkIdType *	localIds,
		vtkIdType *	ids,
		int *	edgeIds,
		vtkGenericAttributeCollection *	att,
		vtkDoubleArray *	points,
		vtkCellArray *	cellArray,
		vtkPointData *	internalPd
	)

protected

Triangulate a triangle of `cell'.

This triangle can be the top-level triangle if the cell is a triangle or a toplevel sub-triangle is the cell is a polygon, or a triangular face of a 3D cell or a top-level sub-triangle of a face of a 3D cell if the face is not a triangle. Arguments `localIds', `ids' and `edgeIds' have the same meaning than for InitTetraTile.

Precondition: cell_exists: cell!=0; localIds_exists: localIds!=0; localIds_size: sizeof(localIds)==3; ids_exists: ids!=0; ids_size: sizeof(ids)==3; edgeIds_exists: edgeIds!=0; edgeIds_size: sizeof(edgeIds)==3

void vtkSimpleCellTessellator::AllocateScalars ( int size )

protected

Allocate some memory if Scalars does not exists or is smaller than size.

Precondition: positive_size: size>0

int vtkSimpleCellTessellator::FindEdgeReferenceCount	(	double	p1[3],
		double	p2[3],
		vtkIdType &	e1,
		vtkIdType &	e2
	)

protected

int vtkSimpleCellTessellator::GetNumberOfCellsUsingFace ( int faceId )

protected

int vtkSimpleCellTessellator::GetNumberOfCellsUsingEdge ( int edgeId )

protected

int vtkSimpleCellTessellator::IsEdgeOnFace	(	double	p1[3],
		double	p2[3]
	)

protected

Is the edge defined by vertices (`p1',`p2') in parametric coordinates on some edge of the original tetrahedron? If yes return on which edge it is, else return -1.

Precondition: p1!=p2; p1 and p2 are in bounding box (0,0,0) (1,1,1)

Postcondition: valid_result: (result==-1) || ( result>=0 && result<=5 )

int vtkSimpleCellTessellator::FindEdgeParent2D	(	double	p1[3],
		double	p2[3],
		int &	localId
	)

protected

Return 1 if the parent of edge defined by vertices (`p1',`p2') in parametric coordinates, is an edge; 3 if there is no parent (the edge is inside).

If the parent is an edge, return its id in `localId'.

Precondition: p1!=p2; p1 and p2 are in bounding box (0,0,0) (1,1,1)

Postcondition: valid_result: (result==1)||(result==3)

int vtkSimpleCellTessellator::FindEdgeParent	(	double	p1[3],
		double	p2[3],
		int &	localId
	)

protected

Return 1 if the parent of edge defined by vertices (`p1',`p2') in parametric coordinates, is an edge; 2 if the parent is a face, 3 if there is no parent (the edge is inside).

If the parent is an edge or a face, return its id in `localId'.

Precondition: p1!=p2; p1 and p2 are in bounding box (0,0,0) (1,1,1)

Postcondition: valid_result: result>=1 && result<=3

void vtkSimpleCellTessellator::AllocatePointIds ( int size )

protected

Allocate some memory if PointIds does not exist or is smaller than size.

Precondition: positive_size: size>0

int vtkSimpleCellTessellator::FacesAreEqual	(	int *	originalFace,
		int	face[3]
	)

protected

Are the faces `originalFace' and `face' equal? The result is independent from any order or orientation.

Precondition: originalFace_exists: originalFace!=0

Friends And Related Function Documentation

friend class vtkTetraTile

friend

Definition at line 421 of file vtkSimpleCellTessellator.h.

friend class vtkTriangleTile

friend

Definition at line 422 of file vtkSimpleCellTessellator.h.

Member Data Documentation

vtkGenericEdgeTable* vtkSimpleCellTessellator::EdgeTable

protected

HashTable instead of vtkPointLocator.

Definition at line 221 of file vtkSimpleCellTessellator.h.

vtkGenericAdaptorCell* vtkSimpleCellTessellator::GenericCell

protected

To access the higher order cell from third party library.

Definition at line 279 of file vtkSimpleCellTessellator.h.

double* vtkSimpleCellTessellator::Scalars

protected

Scalar buffer used to save the interpolate values of the attributes The capacity is at least the number of components of the attribute collection ot the current cell.

Definition at line 299 of file vtkSimpleCellTessellator.h.

int vtkSimpleCellTessellator::ScalarsCapacity

protected

Definition at line 300 of file vtkSimpleCellTessellator.h.

int vtkSimpleCellTessellator::PointOffset

protected

Number of double value to skip to go to the next point into Scalars array It is 6+attributeCollection->GetNumberOfComponents()

Definition at line 306 of file vtkSimpleCellTessellator.h.

vtkGenericCellIterator* vtkSimpleCellTessellator::CellIterator

protected

Used to iterate over edges boundaries in GetNumberOfCellsUsingEdges()

Definition at line 311 of file vtkSimpleCellTessellator.h.