vtkAbstractInterpolatedVelocityField - An abstract class for obtaining the interpolated velocity values at a point More...

Inheritance diagram for Kitware.VTK.vtkAbstractInterpolatedVelocityField:

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Collaboration diagram for Kitware.VTK.vtkAbstractInterpolatedVelocityField:

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List of all members.

Public Member Functions
	vtkAbstractInterpolatedVelocityField (IntPtr rawCppThis, bool callDisposalMethod, bool strong)
	Automatically generated constructor - called from generated code. DO NOT call directly.
virtual void	AddDataSet (vtkDataSet dataset)
	Add a dataset for implicit velocity function evaluation. If more than one dataset is added, the evaluation point is searched in all until a match is found. THIS FUNCTION DOES NOT CHANGE THE REFERENCE COUNT OF dataset FOR THREAD SAFETY REASONS.
void	ClearLastCellId ()
	Set the last cell id to -1 to incur a global cell search for the next point.
virtual void	CopyParameters (vtkAbstractInterpolatedVelocityField from)
	Import parameters. Sub-classes can add more after chaining.
override int	FunctionValues (IntPtr x, IntPtr f)
	Evaluate the velocity field f at point (x, y, z).
virtual int	GetCacheHit ()
	Get the caching statistics. CacheHit refers to the number of level #0 cache hits while CacheMiss is the number of level #0 cache misses.
virtual int	GetCacheMiss ()
	Get the caching statistics. CacheHit refers to the number of level #0 cache hits while CacheMiss is the number of level #0 cache misses.
virtual bool	GetCaching ()
	Set/Get the caching flag. If this flag is turned ON, there are two levels of caching for derived concrete class vtkInterpolatedVelocityField and one level of caching for derived concrete class vtkCellLocatorInterpolatedVelocityField. Otherwise a global cell location is always invoked for evaluating the function values at any point.
virtual int	GetLastCellId ()
	Get/Set the id of the cell cached from last evaluation.
virtual vtkDataSet	GetLastDataSet ()
	Get the most recently visited dataset and it id. The dataset is used for a guess regarding where the next point will be, without searching through all datasets. When setting the last dataset, care is needed as no reference counting or checks are performed. This feature is intended for custom interpolators only that cache datasets independently.
virtual int	GetLastDataSetIndex ()
	Get the most recently visited dataset and it id. The dataset is used for a guess regarding where the next point will be, without searching through all datasets. When setting the last dataset, care is needed as no reference counting or checks are performed. This feature is intended for custom interpolators only that cache datasets independently.
int	GetLastLocalCoordinates (IntPtr pcoords)
	Get the interpolation weights cached from last evaluation. Return 1 if the cached cell is valid and 0 otherwise.
int	GetLastWeights (IntPtr w)
	Get the interpolation weights cached from last evaluation. Return 1 if the cached cell is valid and 0 otherwise.
virtual bool	GetNormalizeVector ()
	Set/Get the flag indicating vector post-normalization (following vector interpolation). Vector post-normalization is required to avoid the 'curve-overshooting' problem (caused by high velocity magnitude) that occurs when Cell-Length is used as the step size unit (particularly the Minimum step size unit). Furthermore, it is required by RK45 to achieve, as expected, high numerical accuracy (or high smoothness of flow lines) through adaptive step sizing. Note this operation is performed (when NormalizeVector TRUE) right after vector interpolation such that the differing amount of contribution of each node (of a cell) to the resulting direction of the interpolated vector, due to the possibly significantly-differing velocity magnitude values at the nodes (which is the case with large cells), can be reflected as is. Also note that this flag needs to be turned to FALSE after vtkInitialValueProblemSolver:: ComputeNextStep() as subsequent operations, e.g., vorticity computation, may need non-normalized vectors.
virtual string	GetVectorsSelection ()
	Get/Set the name of a spcified vector array. By default it is NULL, with the active vector array for use.
override int	IsA (string type)
	*Undocumented Block
new vtkAbstractInterpolatedVelocityField	NewInstance ()
	*Undocumented Block
void	SelectVectors (string fieldName)
	Get/Set the name of a spcified vector array. By default it is NULL, with the active vector array for use.
virtual void	SetCaching (bool _arg)
	Set/Get the caching flag. If this flag is turned ON, there are two levels of caching for derived concrete class vtkInterpolatedVelocityField and one level of caching for derived concrete class vtkCellLocatorInterpolatedVelocityField. Otherwise a global cell location is always invoked for evaluating the function values at any point.
virtual void	SetLastCellId (int c)
	Get/Set the id of the cell cached from last evaluation.
virtual void	SetLastCellId (int c, int dataindex)
	Set the id of the most recently visited cell of a dataset.
virtual void	SetNormalizeVector (bool _arg)
	Set/Get the flag indicating vector post-normalization (following vector interpolation). Vector post-normalization is required to avoid the 'curve-overshooting' problem (caused by high velocity magnitude) that occurs when Cell-Length is used as the step size unit (particularly the Minimum step size unit). Furthermore, it is required by RK45 to achieve, as expected, high numerical accuracy (or high smoothness of flow lines) through adaptive step sizing. Note this operation is performed (when NormalizeVector TRUE) right after vector interpolation such that the differing amount of contribution of each node (of a cell) to the resulting direction of the interpolated vector, due to the possibly significantly-differing velocity magnitude values at the nodes (which is the case with large cells), can be reflected as is. Also note that this flag needs to be turned to FALSE after vtkInitialValueProblemSolver:: ComputeNextStep() as subsequent operations, e.g., vorticity computation, may need non-normalized vectors.
Public Member Functions inherited from Kitware.VTK.vtkFunctionSet
	vtkFunctionSet (IntPtr rawCppThis, bool callDisposalMethod, bool strong)
	Automatically generated constructor - called from generated code. DO NOT call directly.
virtual int	GetNumberOfFunctions ()
	Return the number of functions. Note that this is constant for a given type of set of functions and can not be changed at run time.
virtual int	GetNumberOfIndependentVariables ()
	Return the number of independent variables. Note that this is constant for a given type of set of functions and can not be changed at run time.
Public Member Functions inherited from Kitware.VTK.vtkObject
	vtkObject (IntPtr rawCppThis, bool callDisposalMethod, bool strong)
	Automatically generated constructor - called from generated code. DO NOT call directly.
	vtkObject ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
uint	AddObserver (uint arg0, vtkCommand arg1, float priority)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
uint	AddObserver (string arg0, vtkCommand arg1, float priority)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
virtual void	DebugOff ()
	Turn debugging output off.
virtual void	DebugOn ()
	Turn debugging output on.
vtkCommand	GetCommand (uint tag)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
byte	GetDebug ()
	Get the value of the debug flag.
virtual uint	GetMTime ()
	Return this object's modified time.
int	HasObserver (uint arg0, vtkCommand arg1)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
int	HasObserver (string arg0, vtkCommand arg1)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
int	HasObserver (uint arg0)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
int	HasObserver (string arg0)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
int	InvokeEvent (uint arg0, IntPtr callData)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
int	InvokeEvent (string arg0, IntPtr callData)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
int	InvokeEvent (uint arg0)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
int	InvokeEvent (string arg0)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
virtual void	Modified ()
	Update the modification time for this object. Many filters rely on the modification time to determine if they need to recompute their data. The modification time is a unique monotonically increasing unsigned long integer.
void	RemoveAllObservers ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.
void	RemoveObserver (vtkCommand arg0)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
void	RemoveObserver (uint tag)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
void	RemoveObservers (uint arg0, vtkCommand arg1)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
void	RemoveObservers (string arg0, vtkCommand arg1)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
void	RemoveObservers (uint arg0)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
void	RemoveObservers (string arg0)
	This is a global flag that controls whether any debug, warning or error messages are displayed.
void	SetDebug (byte debugFlag)
	Set the value of the debug flag. A non-zero value turns debugging on.
override string	ToString ()
	Returns the result of calling vtkObject::Print as a C# string.
delegate void	vtkObjectEventHandler (vtkObject sender, vtkObjectEventArgs e)
	Generic signature for all vtkObject events.
void	RemoveAllHandlersForAllEvents ()
	Call RemoveAllHandlers on each non-null vtkObjectEventRelay. TODO: This method needs to get called by the generated Dispose. Make that happen...
Public Member Functions inherited from Kitware.VTK.vtkObjectBase
	vtkObjectBase (IntPtr rawCppThis, bool callDisposalMethod, bool strong)
	Automatically generated constructor - called from generated code. DO NOT call directly.
	vtkObjectBase ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
virtual void	Register (vtkObjectBase o)
	Increase the reference count (mark as used by another object).
virtual void	FastDelete ()
	Delete a reference to this object. This version will not invoke garbage collection and can potentially leak the object if it is part of a reference loop. Use this method only when it is known that the object has another reference and would not be collected if a full garbage collection check were done.
string	GetClassName ()
	Return the class name as a string. This method is defined in all subclasses of vtkObjectBase with the vtkTypeMacro found in vtkSetGet.h.
int	GetReferenceCount ()
	Return the current reference count of this object.
void	SetReferenceCount (int arg0)
	Sets the reference count. (This is very dangerous, use with care.)

Static Public Member Functions
static new int	IsTypeOf (string type)
	*Undocumented Block
static new vtkAbstractInterpolatedVelocityField	SafeDownCast (vtkObjectBase o)
	*Undocumented Block

Public Attributes
new const string	MRFullTypeName = "Kitware.VTK.vtkAbstractInterpolatedVelocityField"
	Automatically generated type registration mechanics.
Public Attributes inherited from Kitware.VTK.vtkFunctionSet
Public Attributes inherited from Kitware.VTK.vtkObject
Public Attributes inherited from Kitware.VTK.vtkObjectBase
Public Attributes inherited from Kitware.VTK.WrappedObject
const string	vtkChartsEL_dll = "libKitware.VTK.vtkCharts.Unmanaged.so"
	Export layer functions for 'vtkCharts' are exported from the DLL named by the value of this variable.
const string	vtkCommonEL_dll = "libKitware.VTK.vtkCommon.Unmanaged.so"
	Export layer functions for 'vtkCommon' are exported from the DLL named by the value of this variable.
const string	vtkFilteringEL_dll = "libKitware.VTK.vtkFiltering.Unmanaged.so"
	Export layer functions for 'vtkFiltering' are exported from the DLL named by the value of this variable.
const string	vtkGenericFilteringEL_dll = "libKitware.VTK.vtkGenericFiltering.Unmanaged.so"
	Export layer functions for 'vtkGenericFiltering' are exported from the DLL named by the value of this variable.
const string	vtkGeovisEL_dll = "libKitware.VTK.vtkGeovis.Unmanaged.so"
	Export layer functions for 'vtkGeovis' are exported from the DLL named by the value of this variable.
const string	vtkGraphicsEL_dll = "libKitware.VTK.vtkGraphics.Unmanaged.so"
	Export layer functions for 'vtkGraphics' are exported from the DLL named by the value of this variable.
const string	vtkHybridEL_dll = "libKitware.VTK.vtkHybrid.Unmanaged.so"
	Export layer functions for 'vtkHybrid' are exported from the DLL named by the value of this variable.
const string	vtkIOEL_dll = "libKitware.VTK.vtkIO.Unmanaged.so"
	Export layer functions for 'vtkIO' are exported from the DLL named by the value of this variable.
const string	vtkImagingEL_dll = "libKitware.VTK.vtkImaging.Unmanaged.so"
	Export layer functions for 'vtkImaging' are exported from the DLL named by the value of this variable.
const string	vtkInfovisEL_dll = "libKitware.VTK.vtkInfovis.Unmanaged.so"
	Export layer functions for 'vtkInfovis' are exported from the DLL named by the value of this variable.
const string	vtkParallelEL_dll = "libKitware.VTK.vtkParallel.Unmanaged.so"
	Export layer functions for 'vtkParallel' are exported from the DLL named by the value of this variable.
const string	vtkRenderingEL_dll = "libKitware.VTK.vtkRendering.Unmanaged.so"
	Export layer functions for 'vtkRendering' are exported from the DLL named by the value of this variable.
const string	vtkViewsEL_dll = "libKitware.VTK.vtkViews.Unmanaged.so"
	Export layer functions for 'vtkViews' are exported from the DLL named by the value of this variable.
const string	vtkVolumeRenderingEL_dll = "libKitware.VTK.vtkVolumeRendering.Unmanaged.so"
	Export layer functions for 'vtkVolumeRendering' are exported from the DLL named by the value of this variable.
const string	vtkWidgetsEL_dll = "libKitware.VTK.vtkWidgets.Unmanaged.so"
	Export layer functions for 'vtkWidgets' are exported from the DLL named by the value of this variable.

Static Public Attributes
static new readonly string	MRClassNameKey = "36vtkAbstractInterpolatedVelocityField"
	Automatically generated type registration mechanics.
Static Public Attributes inherited from Kitware.VTK.vtkFunctionSet
Static Public Attributes inherited from Kitware.VTK.vtkObject
Static Public Attributes inherited from Kitware.VTK.vtkObjectBase

Protected Member Functions
override void	Dispose (bool disposing)
	Automatically generated protected Dispose method - called from public Dispose or the C# destructor. DO NOT call directly.

Static Private Member Functions
static	vtkAbstractInterpolatedVelocityField ()
	Automatically generated type registration mechanics.

Detailed Description

vtkAbstractInterpolatedVelocityField - An abstract class for obtaining the interpolated velocity values at a point

Description vtkAbstractInterpolatedVelocityField acts as a continuous velocity field by performing cell interpolation on the underlying vtkDataSet. This is an abstract sub-class of vtkFunctionSet, NumberOfIndependentVariables = 4 (x,y,z,t) and NumberOfFunctions = 3 (u,v,w). With a brute-force scheme, every time an evaluation is performed, the target cell containing point (x,y,z) needs to be found by calling FindCell(), via either vtkDataSet or vtkAbstractCelllocator's sub-classes (vtkCellLocator & vtkModifiedBSPTree). As it incurs a large cost, one (for vtkCellLocatorInterpolatedVelocityField via vtkAbstractCellLocator) or two (for vtkInterpolatedVelocityField via vtkDataSet that involves vtkPointLocator in addressing vtkPointSet) levels of cell caching may be exploited to increase the performance.

For vtkInterpolatedVelocityField, level #0 begins with intra-cell caching. Specifically if the previous cell is valid and the next point is still in it ( i.e., vtkCell::EvaluatePosition() returns 1, coupled with newly created parametric coordinates & weights ), the function values can be interpolated and only vtkCell::EvaluatePosition() is invoked. If this fails, then level #1 follows by inter-cell search for the target cell that contains the next point. By an inter-cell search, the previous cell provides an important clue or serves as an immediate neighbor to aid in locating the target cell via vtkPointSet:: FindCell(). If this still fails, a global cell location / search is invoked via vtkPointSet::FindCell(). Here regardless of either inter-cell or global search, vtkPointLocator is in fact employed (for datasets of type vtkPointSet only, note vtkImageData and vtkRectilinearGrid are able to provide rapid and robust cell location due to the simple mesh topology) as a crucial tool underlying the cell locator. However, the use of vtkPointLocator makes vtkInterpolatedVelocityField non-robust in cell location for vtkPointSet.

For vtkCellLocatorInterpolatedVelocityField, the only caching (level #0) works by intra-cell trial. In case of failure, a global search for the target cell is invoked via vtkAbstractCellLocator::FindCell() and the actual work is done by either vtkCellLocator or vtkModifiedBSPTree (for datasets of type vtkPointSet only, while vtkImageData and vtkRectilinearGrid themselves are able to provide fast robust cell location). Without the involvement of vtkPointLocator, robust cell location is achieved for vtkPointSet.

Caveats vtkAbstractInterpolatedVelocityField is not thread safe. A new instance should be created by each thread.

Constructor & Destructor Documentation

static Kitware.VTK.vtkAbstractInterpolatedVelocityField.vtkAbstractInterpolatedVelocityField ( )

staticprivate

Automatically generated type registration mechanics.

Kitware.VTK.vtkAbstractInterpolatedVelocityField.vtkAbstractInterpolatedVelocityField	(	IntPtr	rawCppThis,
		bool	callDisposalMethod,
		bool	strong
	)

Automatically generated constructor - called from generated code. DO NOT call directly.

Member Function Documentation

virtual void Kitware.VTK.vtkAbstractInterpolatedVelocityField.AddDataSet ( vtkDataSet dataset )

virtual

Add a dataset for implicit velocity function evaluation. If more than one dataset is added, the evaluation point is searched in all until a match is found. THIS FUNCTION DOES NOT CHANGE THE REFERENCE COUNT OF dataset FOR THREAD SAFETY REASONS.

Reimplemented in Kitware.VTK.vtkInterpolatedVelocityField, and Kitware.VTK.vtkCellLocatorInterpolatedVelocityField.

void Kitware.VTK.vtkAbstractInterpolatedVelocityField.ClearLastCellId ( )

Set the last cell id to -1 to incur a global cell search for the next point.

virtual void Kitware.VTK.vtkAbstractInterpolatedVelocityField.CopyParameters ( vtkAbstractInterpolatedVelocityField from )

virtual

Import parameters. Sub-classes can add more after chaining.

Reimplemented in Kitware.VTK.vtkCellLocatorInterpolatedVelocityField.

override void Kitware.VTK.vtkAbstractInterpolatedVelocityField.Dispose ( bool disposing )

protected

Automatically generated protected Dispose method - called from public Dispose or the C# destructor. DO NOT call directly.

Reimplemented from Kitware.VTK.vtkFunctionSet.

Reimplemented in Kitware.VTK.vtkInterpolatedVelocityField, and Kitware.VTK.vtkCellLocatorInterpolatedVelocityField.

override int Kitware.VTK.vtkAbstractInterpolatedVelocityField.FunctionValues	(	IntPtr	x,
		IntPtr	f
	)

virtual

Evaluate the velocity field f at point (x, y, z).

Reimplemented from Kitware.VTK.vtkFunctionSet.

Reimplemented in Kitware.VTK.vtkCellLocatorInterpolatedVelocityField, and Kitware.VTK.vtkInterpolatedVelocityField.

virtual int Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetCacheHit ( )

virtual

Get the caching statistics. CacheHit refers to the number of level #0 cache hits while CacheMiss is the number of level #0 cache misses.

virtual int Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetCacheMiss ( )

virtual

Get the caching statistics. CacheHit refers to the number of level #0 cache hits while CacheMiss is the number of level #0 cache misses.

virtual bool Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetCaching ( )

virtual

Set/Get the caching flag. If this flag is turned ON, there are two levels of caching for derived concrete class vtkInterpolatedVelocityField and one level of caching for derived concrete class vtkCellLocatorInterpolatedVelocityField. Otherwise a global cell location is always invoked for evaluating the function values at any point.

virtual int Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetLastCellId ( )

virtual

Get/Set the id of the cell cached from last evaluation.

virtual vtkDataSet Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetLastDataSet ( )

virtual

Get the most recently visited dataset and it id. The dataset is used for a guess regarding where the next point will be, without searching through all datasets. When setting the last dataset, care is needed as no reference counting or checks are performed. This feature is intended for custom interpolators only that cache datasets independently.

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virtual int Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetLastDataSetIndex ( )

virtual

Get the most recently visited dataset and it id. The dataset is used for a guess regarding where the next point will be, without searching through all datasets. When setting the last dataset, care is needed as no reference counting or checks are performed. This feature is intended for custom interpolators only that cache datasets independently.

int Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetLastLocalCoordinates ( IntPtr pcoords )

Get the interpolation weights cached from last evaluation. Return 1 if the cached cell is valid and 0 otherwise.

int Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetLastWeights ( IntPtr w )

Get the interpolation weights cached from last evaluation. Return 1 if the cached cell is valid and 0 otherwise.

virtual bool Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetNormalizeVector ( )

virtual

Set/Get the flag indicating vector post-normalization (following vector interpolation). Vector post-normalization is required to avoid the 'curve-overshooting' problem (caused by high velocity magnitude) that occurs when Cell-Length is used as the step size unit (particularly the Minimum step size unit). Furthermore, it is required by RK45 to achieve, as expected, high numerical accuracy (or high smoothness of flow lines) through adaptive step sizing. Note this operation is performed (when NormalizeVector TRUE) right after vector interpolation such that the differing amount of contribution of each node (of a cell) to the resulting direction of the interpolated vector, due to the possibly significantly-differing velocity magnitude values at the nodes (which is the case with large cells), can be reflected as is. Also note that this flag needs to be turned to FALSE after vtkInitialValueProblemSolver:: ComputeNextStep() as subsequent operations, e.g., vorticity computation, may need non-normalized vectors.

virtual string Kitware.VTK.vtkAbstractInterpolatedVelocityField.GetVectorsSelection ( )

virtual

Get/Set the name of a spcified vector array. By default it is NULL, with the active vector array for use.

override int Kitware.VTK.vtkAbstractInterpolatedVelocityField.IsA ( string type )

virtual

*Undocumented Block

Reimplemented from Kitware.VTK.vtkFunctionSet.

Reimplemented in Kitware.VTK.vtkCellLocatorInterpolatedVelocityField, and Kitware.VTK.vtkInterpolatedVelocityField.

static new int Kitware.VTK.vtkAbstractInterpolatedVelocityField.IsTypeOf ( string type )

static

*Undocumented Block

Reimplemented from Kitware.VTK.vtkFunctionSet.

Reimplemented in Kitware.VTK.vtkCellLocatorInterpolatedVelocityField, and Kitware.VTK.vtkInterpolatedVelocityField.

new vtkAbstractInterpolatedVelocityField Kitware.VTK.vtkAbstractInterpolatedVelocityField.NewInstance ( )

*Undocumented Block

Reimplemented from Kitware.VTK.vtkFunctionSet.

Reimplemented in Kitware.VTK.vtkCellLocatorInterpolatedVelocityField, and Kitware.VTK.vtkInterpolatedVelocityField.

static new vtkAbstractInterpolatedVelocityField Kitware.VTK.vtkAbstractInterpolatedVelocityField.SafeDownCast ( vtkObjectBase o )

static

*Undocumented Block

Reimplemented from Kitware.VTK.vtkFunctionSet.

Reimplemented in Kitware.VTK.vtkCellLocatorInterpolatedVelocityField, and Kitware.VTK.vtkInterpolatedVelocityField.

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void Kitware.VTK.vtkAbstractInterpolatedVelocityField.SelectVectors ( string fieldName )

Get/Set the name of a spcified vector array. By default it is NULL, with the active vector array for use.

virtual void Kitware.VTK.vtkAbstractInterpolatedVelocityField.SetCaching ( bool _arg )

virtual

Set/Get the caching flag. If this flag is turned ON, there are two levels of caching for derived concrete class vtkInterpolatedVelocityField and one level of caching for derived concrete class vtkCellLocatorInterpolatedVelocityField. Otherwise a global cell location is always invoked for evaluating the function values at any point.

virtual void Kitware.VTK.vtkAbstractInterpolatedVelocityField.SetLastCellId ( int c )

virtual

Get/Set the id of the cell cached from last evaluation.

Reimplemented in Kitware.VTK.vtkCellLocatorInterpolatedVelocityField, and Kitware.VTK.vtkInterpolatedVelocityField.

virtual void Kitware.VTK.vtkAbstractInterpolatedVelocityField.SetLastCellId	(	int	c,
		int	dataindex
	)

virtual

Set the id of the most recently visited cell of a dataset.

Reimplemented in Kitware.VTK.vtkCellLocatorInterpolatedVelocityField, and Kitware.VTK.vtkInterpolatedVelocityField.

virtual void Kitware.VTK.vtkAbstractInterpolatedVelocityField.SetNormalizeVector ( bool _arg )

virtual

Set/Get the flag indicating vector post-normalization (following vector interpolation). Vector post-normalization is required to avoid the 'curve-overshooting' problem (caused by high velocity magnitude) that occurs when Cell-Length is used as the step size unit (particularly the Minimum step size unit). Furthermore, it is required by RK45 to achieve, as expected, high numerical accuracy (or high smoothness of flow lines) through adaptive step sizing. Note this operation is performed (when NormalizeVector TRUE) right after vector interpolation such that the differing amount of contribution of each node (of a cell) to the resulting direction of the interpolated vector, due to the possibly significantly-differing velocity magnitude values at the nodes (which is the case with large cells), can be reflected as is. Also note that this flag needs to be turned to FALSE after vtkInitialValueProblemSolver:: ComputeNextStep() as subsequent operations, e.g., vorticity computation, may need non-normalized vectors.