helper class to generate triangulations More...

#include <vtkOrderedTriangulator.h>

Inheritance diagram for vtkOrderedTriangulator:

Collaboration diagram for vtkOrderedTriangulator:

Public Types
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.

vtkOrderedTriangulator *	NewInstance () const

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

void	UpdatePointType (vtkIdType internalId, int type)
	Update the point type.

double *	GetPointPosition (vtkIdType internalId)
	Return the parametric coordinates of point ‘internalId’.

double *	GetPointLocation (vtkIdType internalId)
	Return the global coordinates of point ‘internalId’.

vtkIdType	GetPointId (vtkIdType internalId)
	Return the Id of point ‘internalId’.

vtkIdType	GetTetras (int classification, vtkUnstructuredGrid *ugrid)
	Initialize and add the tetras and points from the triangulation to the unstructured grid provided.

vtkIdType	AddTetras (int classification, vtkUnstructuredGrid *ugrid)
	Add the tetras to the unstructured grid provided.

vtkIdType	AddTetras (int classification, vtkCellArray *connectivity)
	Add the tetrahedra classified (0=inside,1=outside) to the connectivity list provided.

vtkIdType	AddTetras (int classification, vtkIncrementalPointLocator locator, vtkCellArray outConnectivity, vtkPointData inPD, vtkPointData outPD, vtkCellData inCD, vtkIdType cellId, vtkCellData outCD)
	Assuming that all the inserted points come from a cell ‘cellId’ to triangulate, get the tetrahedra in outConnectivity, the points in locator and copy point data and cell data.

vtkIdType	AddTetras (int classification, vtkIdList ptIds, vtkPoints pts)
	Add the tetrahedra classified (0=inside,1=outside) to the list of ids and coordinates provided.

vtkIdType	AddTriangles (vtkCellArray *connectivity)
	Add the triangle faces classified (2=boundary) to the connectivity list provided.

vtkIdType	AddTriangles (vtkIdType id, vtkCellArray *connectivity)
	Add the triangle faces classified (2=boundary) and attached to the specified point id to the connectivity list provided.

void	InitTetraTraversal ()
	Methods to get one tetra at a time.

int	GetNextTetra (int classification, vtkTetra tet, vtkDataArray cellScalars, vtkDoubleArray *tetScalars)
	Methods to get one tetra at a time.


void	InitTriangulation (double xmin, double xmax, double ymin, double ymax, double zmin, double zmax, int numPts)
	Initialize the triangulation process.

void	InitTriangulation (double bounds[6], int numPts)
	Initialize the triangulation process.


vtkIdType	InsertPoint (vtkIdType id, double x[3], double p[3], int type)
	For each point to be inserted, provide an id, a position x, parametric coordinate p, and whether the point is inside (type=0), outside (type=1), or on the boundary (type=2).

vtkIdType	InsertPoint (vtkIdType id, vtkIdType sortid, double x[3], double p[3], int type)
	For each point to be inserted, provide an id, a position x, parametric coordinate p, and whether the point is inside (type=0), outside (type=1), or on the boundary (type=2).

vtkIdType	InsertPoint (vtkIdType id, vtkIdType sortid, vtkIdType sortid2, double x[3], double p[3], int type)
	For each point to be inserted, provide an id, a position x, parametric coordinate p, and whether the point is inside (type=0), outside (type=1), or on the boundary (type=2).


void	Triangulate ()
	Perform the triangulation.

void	TemplateTriangulate (int cellType, int numPts, int numEdges)
	Perform the triangulation.


virtual int	GetNumberOfPoints ()
	Return the number of inserted points.


virtual void	SetUseTemplates (vtkTypeBool)
	If this flag is set, then the ordered triangulator will create and use templates for the triangulation.

virtual vtkTypeBool	GetUseTemplates ()
	If this flag is set, then the ordered triangulator will create and use templates for the triangulation.

virtual void	UseTemplatesOn ()
	If this flag is set, then the ordered triangulator will create and use templates for the triangulation.

virtual void	UseTemplatesOff ()
	If this flag is set, then the ordered triangulator will create and use templates for the triangulation.


virtual void	SetPreSorted (vtkTypeBool)
	Boolean indicates whether the points have been pre-sorted.

virtual vtkTypeBool	GetPreSorted ()
	Boolean indicates whether the points have been pre-sorted.

virtual void	PreSortedOn ()
	Boolean indicates whether the points have been pre-sorted.

virtual void	PreSortedOff ()
	Boolean indicates whether the points have been pre-sorted.


virtual void	SetUseTwoSortIds (vtkTypeBool)
	Tells the triangulator that a second sort id is provided for each point and should also be considered when sorting.

virtual vtkTypeBool	GetUseTwoSortIds ()
	Tells the triangulator that a second sort id is provided for each point and should also be considered when sorting.

virtual void	UseTwoSortIdsOn ()
	Tells the triangulator that a second sort id is provided for each point and should also be considered when sorting.

virtual void	UseTwoSortIdsOff ()
	Tells the triangulator that a second sort id is provided for each point and should also be considered when sorting.

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

virtual void	DebugOn ()
	Turn debugging output on.

virtual void	DebugOff ()
	Turn debugging output off.

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

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

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

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

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

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

virtual void	Delete ()
	Delete a VTK object.

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

void	InitializeObjectBase ()

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

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

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

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

void	SetReferenceCount (int)
	Sets the reference count.

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

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

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

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

static vtkOrderedTriangulator *	SafeDownCast (vtkObjectBase *o)

static vtkOrderedTriangulator *	New ()
	Construct object.

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

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

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

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

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

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

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

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

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

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

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

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkOrderedTriangulator ()

	~vtkOrderedTriangulator () override

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events.

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

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Additional Inherited Members
Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

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

vtkWeakPointerBase **	WeakPointers

Detailed Description

helper class to generate triangulations

This class is used to generate unique triangulations of points. The uniqueness of the triangulation is controlled by the id of the inserted points in combination with a Delaunay criterion. The class is designed to be as fast as possible (since the algorithm can be slow) and uses block memory allocations to support rapid triangulation generation. Also, the assumption behind the class is that a maximum of hundreds of points are to be triangulated. If you desire more robust triangulation methods use vtkPolygon::Triangulate(), vtkDelaunay2D, or vtkDelaunay3D.

Background:: This work is documented in the technical paper: W.J. Schroeder, B. Geveci, M. Malaterre. Compatible Triangulations of Spatial Decompositions. In Proceedings of Visualization 2004, IEEE Press October 2004.

Background:: Delaunay triangulations are unique assuming a random distribution of input points. The 3D Delaunay criterion is as follows: the circumsphere of each tetrahedron contains no other points of the triangulation except for the four points defining the tetrahedron. In application this property is hard to satisfy because objects like cubes are defined by eight points all sharing the same circumsphere (center and radius); hence the Delaunay triangulation is not unique. These so-called degenerate situations are typically resolved by arbitrary selecting a triangulation. This code does something different: it resolves degenerate triangulations by modifying the "InCircumsphere" method to use a slightly smaller radius. Hence, degenerate points are always considered "out" of the circumsphere. This, in combination with an ordering (based on id) of the input points, guarantees a unique triangulation.

Background:: There is another related characteristic of Delaunay triangulations. Given a N-dimensional Delaunay triangulation, points laying on a (N-1) dimensional plane also form a (N-1) Delaunay triangulation. This means for example, that if a 3D cell is defined by a set of (2D) planar faces, then the face triangulations are Delaunay. Combining this with the method to generate unique triangulations described previously, the triangulations on the face are guaranteed unique. This fact can be used to triangulate 3D objects in such a way to guarantee compatible face triangulations. This is a very useful fact for parallel processing, or performing operations like clipping that require compatible triangulations across 3D cell faces. (See vtkClipVolume for an example.)

Background:: A special feature of this class is that it can generate triangulation templates on the fly. If template triangulation is enabled, then the ordered triangulator will first triangulate the cell using the slower ordered Delaunay approach, and then store the result as a template. Later, if the same cell type and cell configuration is encountered, then the template is reused which greatly speeds the triangulation.

Warning: Duplicate vertices will be ignored, i.e., if two points have the same coordinates the second one is discarded. The implications are that the user of this class must prevent duplicate points. Because the precision of this algorithm is double, it's also a good idea to merge points that are within some epsilon of one another.; The triangulation is performed using the parametric coordinates of the inserted points. Therefore the bounds (see InitTriangulation()) should represent the range of the parametric coordinates of the inserted points.

See also: vtkDelaunay2D vtkDelaunay3D vtkPolygon

Definition at line 114 of file vtkOrderedTriangulator.h.

Member Typedef Documentation

◆ Superclass

typedef vtkObject vtkOrderedTriangulator::Superclass

Definition at line 117 of file vtkOrderedTriangulator.h.

Constructor & Destructor Documentation

◆ vtkOrderedTriangulator()

vtkOrderedTriangulator::vtkOrderedTriangulator ( )

protected

◆ ~vtkOrderedTriangulator()

vtkOrderedTriangulator::~vtkOrderedTriangulator ( )

overrideprotected

Member Function Documentation

◆ IsTypeOf()

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

static

◆ IsA()

virtual vtkTypeBool vtkOrderedTriangulator::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 vtkObjectBase.

◆ SafeDownCast()

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

static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkOrderedTriangulator::NewInstanceInternal ( ) const

protectedvirtual

◆ NewInstance()

vtkOrderedTriangulator * vtkOrderedTriangulator::NewInstance ( ) const

◆ PrintSelf()

void vtkOrderedTriangulator::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 vtkObject.

◆ New()

static vtkOrderedTriangulator * vtkOrderedTriangulator::New ( )

static

Construct object.

◆ InitTriangulation() [1/2]

void vtkOrderedTriangulator::InitTriangulation	(	double	xmin,
		double	xmax,
		double	ymin,
		double	ymax,
		double	zmin,
		double	zmax,
		int	numPts
	)

Initialize the triangulation process.

Provide a bounding box and the maximum number of points to be inserted. Note that since the triangulation is performed using parametric coordinates (see InsertPoint()) the bounds should be represent the range of the parametric coordinates inserted.

Postcondition: no_point_inserted: GetNumberOfPoints()==0

◆ InitTriangulation() [2/2]

void vtkOrderedTriangulator::InitTriangulation	(	double	bounds[6],
		int	numPts
	)

Initialize the triangulation process.

Provide a bounding box and the maximum number of points to be inserted. Note that since the triangulation is performed using parametric coordinates (see InsertPoint()) the bounds should be represent the range of the parametric coordinates inserted.

Postcondition: no_point_inserted: GetNumberOfPoints()==0

◆ InsertPoint() [1/3]

vtkIdType vtkOrderedTriangulator::InsertPoint	(	vtkIdType	id,
		double	x[3],
		double	p[3],
		int	type
	)

For each point to be inserted, provide an id, a position x, parametric coordinate p, and whether the point is inside (type=0), outside (type=1), or on the boundary (type=2).

You must call InitTriangulation() prior to invoking this method. Make sure that the number of points inserted does not exceed the numPts specified in InitTriangulation(). Also note that the "id" can be any integer and can be greater than numPts. It is used to create tetras (in AddTetras()) with the appropriate connectivity ids. The method returns an internal id that can be used prior to the Triangulate() method to update the type of the point with UpdatePointType(). (Note: the algorithm triangulated with the parametric coordinate p[3] and creates tetras with the global coordinate x[3]. The parametric coordinates and global coordinates may be the same.)

◆ InsertPoint() [2/3]

vtkIdType vtkOrderedTriangulator::InsertPoint	(	vtkIdType	id,
		vtkIdType	sortid,
		double	x[3],
		double	p[3],
		int	type
	)

For each point to be inserted, provide an id, a position x, parametric coordinate p, and whether the point is inside (type=0), outside (type=1), or on the boundary (type=2).

You must call InitTriangulation() prior to invoking this method. Make sure that the number of points inserted does not exceed the numPts specified in InitTriangulation(). Also note that the "id" can be any integer and can be greater than numPts. It is used to create tetras (in AddTetras()) with the appropriate connectivity ids. The method returns an internal id that can be used prior to the Triangulate() method to update the type of the point with UpdatePointType(). (Note: the algorithm triangulated with the parametric coordinate p[3] and creates tetras with the global coordinate x[3]. The parametric coordinates and global coordinates may be the same.)

◆ InsertPoint() [3/3]

vtkIdType vtkOrderedTriangulator::InsertPoint	(	vtkIdType	id,
		vtkIdType	sortid,
		vtkIdType	sortid2,
		double	x[3],
		double	p[3],
		int	type
	)

For each point to be inserted, provide an id, a position x, parametric coordinate p, and whether the point is inside (type=0), outside (type=1), or on the boundary (type=2).

You must call InitTriangulation() prior to invoking this method. Make sure that the number of points inserted does not exceed the numPts specified in InitTriangulation(). Also note that the "id" can be any integer and can be greater than numPts. It is used to create tetras (in AddTetras()) with the appropriate connectivity ids. The method returns an internal id that can be used prior to the Triangulate() method to update the type of the point with UpdatePointType(). (Note: the algorithm triangulated with the parametric coordinate p[3] and creates tetras with the global coordinate x[3]. The parametric coordinates and global coordinates may be the same.)

◆ Triangulate()

void vtkOrderedTriangulator::Triangulate ( )

Perform the triangulation.

(Complete all calls to InsertPoint() prior to invoking this method.) A special version is available when templates should be used.

◆ TemplateTriangulate()

void vtkOrderedTriangulator::TemplateTriangulate	(	int	cellType,
		int	numPts,
		int	numEdges
	)

Perform the triangulation.

(Complete all calls to InsertPoint() prior to invoking this method.) A special version is available when templates should be used.

◆ UpdatePointType()

void vtkOrderedTriangulator::UpdatePointType	(	vtkIdType	internalId,
		int	type
	)

Update the point type.

This is useful when the merging of nearly coincident points is performed. The id is the internal id returned from InsertPoint(). The method should be invoked prior to the Triangulate method. The type is specified as inside (type=0), outside (type=1), or on the boundary (type=2).

Precondition: valid_range: internalId>=0 && internalId<this->GetNumberOfPoints()

◆ GetPointPosition()

double * vtkOrderedTriangulator::GetPointPosition ( vtkIdType internalId )

Return the parametric coordinates of point ‘internalId’.

It assumes that the point has already been inserted. The method should be invoked prior to the Triangulate method.

Precondition: valid_range: internalId>=0 && internalId<this->GetNumberOfPoints()

◆ GetPointLocation()

double * vtkOrderedTriangulator::GetPointLocation ( vtkIdType internalId )

Return the global coordinates of point ‘internalId’.

It assumes that the point has already been inserted. The method should be invoked prior to the Triangulate method.

Precondition: valid_range: internalId>=0 && internalId<this->GetNumberOfPoints()

◆ GetPointId()

vtkIdType vtkOrderedTriangulator::GetPointId ( vtkIdType internalId )

Return the Id of point ‘internalId’.

This id is the one passed in argument of InsertPoint. It assumes that the point has already been inserted. The method should be invoked prior to the Triangulate method.

Precondition: valid_range: internalId>=0 && internalId<this->GetNumberOfPoints()

◆ GetNumberOfPoints()

virtual int vtkOrderedTriangulator::GetNumberOfPoints ( )

virtual

Return the number of inserted points.

◆ SetUseTemplates()

virtual void vtkOrderedTriangulator::SetUseTemplates ( vtkTypeBool )

virtual

If this flag is set, then the ordered triangulator will create and use templates for the triangulation.

To use templates, the TemplateTriangulate() method should be called when appropriate. (Note: the TemplateTriangulate() method works for complete (interior) cells without extra points due to intersection, etc.)

◆ GetUseTemplates()

virtual vtkTypeBool vtkOrderedTriangulator::GetUseTemplates ( )

virtual

If this flag is set, then the ordered triangulator will create and use templates for the triangulation.

To use templates, the TemplateTriangulate() method should be called when appropriate. (Note: the TemplateTriangulate() method works for complete (interior) cells without extra points due to intersection, etc.)

◆ UseTemplatesOn()

virtual void vtkOrderedTriangulator::UseTemplatesOn ( )

virtual

If this flag is set, then the ordered triangulator will create and use templates for the triangulation.

To use templates, the TemplateTriangulate() method should be called when appropriate. (Note: the TemplateTriangulate() method works for complete (interior) cells without extra points due to intersection, etc.)

◆ UseTemplatesOff()

virtual void vtkOrderedTriangulator::UseTemplatesOff ( )

virtual

If this flag is set, then the ordered triangulator will create and use templates for the triangulation.

To use templates, the TemplateTriangulate() method should be called when appropriate. (Note: the TemplateTriangulate() method works for complete (interior) cells without extra points due to intersection, etc.)

◆ SetPreSorted()

virtual void vtkOrderedTriangulator::SetPreSorted ( vtkTypeBool )

virtual

Boolean indicates whether the points have been pre-sorted.

If pre-sorted is enabled, the points are not sorted on point id. By default, presorted is off. (The point id is defined in InsertPoint().)

◆ GetPreSorted()

virtual vtkTypeBool vtkOrderedTriangulator::GetPreSorted ( )

virtual

Boolean indicates whether the points have been pre-sorted.

If pre-sorted is enabled, the points are not sorted on point id. By default, presorted is off. (The point id is defined in InsertPoint().)

◆ PreSortedOn()

virtual void vtkOrderedTriangulator::PreSortedOn ( )

virtual

Boolean indicates whether the points have been pre-sorted.

If pre-sorted is enabled, the points are not sorted on point id. By default, presorted is off. (The point id is defined in InsertPoint().)

◆ PreSortedOff()

virtual void vtkOrderedTriangulator::PreSortedOff ( )

virtual

Boolean indicates whether the points have been pre-sorted.

If pre-sorted is enabled, the points are not sorted on point id. By default, presorted is off. (The point id is defined in InsertPoint().)

◆ SetUseTwoSortIds()

virtual void vtkOrderedTriangulator::SetUseTwoSortIds ( vtkTypeBool )

virtual

Tells the triangulator that a second sort id is provided for each point and should also be considered when sorting.

◆ GetUseTwoSortIds()

virtual vtkTypeBool vtkOrderedTriangulator::GetUseTwoSortIds ( )

virtual

Tells the triangulator that a second sort id is provided for each point and should also be considered when sorting.

◆ UseTwoSortIdsOn()

virtual void vtkOrderedTriangulator::UseTwoSortIdsOn ( )

virtual

Tells the triangulator that a second sort id is provided for each point and should also be considered when sorting.

◆ UseTwoSortIdsOff()

virtual void vtkOrderedTriangulator::UseTwoSortIdsOff ( )

virtual

Tells the triangulator that a second sort id is provided for each point and should also be considered when sorting.

◆ GetTetras()

vtkIdType vtkOrderedTriangulator::GetTetras	(	int	classification,
		vtkUnstructuredGrid *	ugrid
	)

Initialize and add the tetras and points from the triangulation to the unstructured grid provided.

New points are created and the mesh is allocated. (This method differs from AddTetras() in that it inserts points and cells; AddTetras only adds the tetra cells.) The tetrahdera added are of the type specified (0=inside,1=outside,2=all). Inside tetrahedron are those whose points are classified "inside" or on the "boundary." Outside tetrahedron have at least one point classified "outside." The method returns the number of tetrahedrahedron of the type requested.

◆ AddTetras() [1/4]

vtkIdType vtkOrderedTriangulator::AddTetras	(	int	classification,
		vtkUnstructuredGrid *	ugrid
	)

Add the tetras to the unstructured grid provided.

The unstructured grid is assumed to have been initialized (with Allocate()) and points set (with SetPoints()). The tetrahdera added are of the type specified (0=inside,1=outside,2=all). Inside tetrahedron are those whose points are classified "inside" or on the "boundary." Outside tetrahedron have at least one point classified "outside." The method returns the number of tetrahedrahedron of the type requested.

◆ AddTetras() [2/4]

vtkIdType vtkOrderedTriangulator::AddTetras	(	int	classification,
		vtkCellArray *	connectivity
	)

Add the tetrahedra classified (0=inside,1=outside) to the connectivity list provided.

Inside tetrahedron are those whose points are all classified "inside." Outside tetrahedron have at least one point classified "outside." The method returns the number of tetrahedron of the type requested.

◆ AddTetras() [3/4]

vtkIdType vtkOrderedTriangulator::AddTetras	(	int	classification,
		vtkIncrementalPointLocator *	locator,
		vtkCellArray *	outConnectivity,
		vtkPointData *	inPD,
		vtkPointData *	outPD,
		vtkCellData *	inCD,
		vtkIdType	cellId,
		vtkCellData *	outCD
	)

Assuming that all the inserted points come from a cell ‘cellId’ to triangulate, get the tetrahedra in outConnectivity, the points in locator and copy point data and cell data.

Return the number of added tetras.

Precondition: locator_exists: locator!=0; outConnectivity: outConnectivity!=0; inPD_exists: inPD!=0; outPD_exists: outPD!=0; inCD_exists: inCD!=0; outCD_exists: outCD!=0

◆ AddTetras() [4/4]

vtkIdType vtkOrderedTriangulator::AddTetras	(	int	classification,
		vtkIdList *	ptIds,
		vtkPoints *	pts
	)

Add the tetrahedra classified (0=inside,1=outside) to the list of ids and coordinates provided.

These assume that the first four points form a tetrahedron, the next four the next, and so on.

◆ AddTriangles() [1/2]

vtkIdType vtkOrderedTriangulator::AddTriangles ( vtkCellArray * connectivity )

Add the triangle faces classified (2=boundary) to the connectivity list provided.

The method returns the number of triangles.

◆ AddTriangles() [2/2]

vtkIdType vtkOrderedTriangulator::AddTriangles	(	vtkIdType	id,
		vtkCellArray *	connectivity
	)

Add the triangle faces classified (2=boundary) and attached to the specified point id to the connectivity list provided.

(The id is the same as that specified in InsertPoint().)

◆ InitTetraTraversal()

void vtkOrderedTriangulator::InitTetraTraversal ( )

Methods to get one tetra at a time.

Start with InitTetraTraversal() and then invoke GetNextTetra() until the method returns 0.

◆ GetNextTetra()

int vtkOrderedTriangulator::GetNextTetra	(	int	classification,
		vtkTetra *	tet,
		vtkDataArray *	cellScalars,
		vtkDoubleArray *	tetScalars
	)

Methods to get one tetra at a time.

Start with InitTetraTraversal() and then invoke GetNextTetra() until the method returns 0. cellScalars are point-centered scalars on the original cell. tetScalars are point-centered scalars on the tetra: the values will be copied from cellScalars.

Precondition: tet_exists: tet!=0; cellScalars_exists: cellScalars!=0; tetScalars_exists: tetScalars!=0; tetScalars_valid_size: tetScalars->GetNumberOfTuples()==4

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

Common/DataModel/vtkOrderedTriangulator.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Superclass

Constructor & Destructor Documentation

◆ vtkOrderedTriangulator()

◆ ~vtkOrderedTriangulator()

Member Function Documentation

◆ IsTypeOf()

◆ IsA()

◆ SafeDownCast()

◆ NewInstanceInternal()

◆ NewInstance()

◆ PrintSelf()

◆ New()

◆ InitTriangulation() [1/2]

◆ InitTriangulation() [2/2]

◆ InsertPoint() [1/3]

◆ InsertPoint() [2/3]

◆ InsertPoint() [3/3]

◆ Triangulate()

◆ TemplateTriangulate()

◆ UpdatePointType()

◆ GetPointPosition()

◆ GetPointLocation()

◆ GetPointId()

◆ GetNumberOfPoints()

◆ SetUseTemplates()

◆ GetUseTemplates()

◆ UseTemplatesOn()

◆ UseTemplatesOff()

◆ SetPreSorted()

◆ GetPreSorted()

◆ PreSortedOn()

◆ PreSortedOff()

◆ SetUseTwoSortIds()

◆ GetUseTwoSortIds()

◆ UseTwoSortIdsOn()

◆ UseTwoSortIdsOff()

◆ GetTetras()

◆ AddTetras() [1/4]

◆ AddTetras() [2/4]

◆ AddTetras() [3/4]

◆ AddTetras() [4/4]

◆ AddTriangles() [1/2]

◆ AddTriangles() [2/2]

◆ InitTetraTraversal()

◆ GetNextTetra()