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vtkStreamer Class Reference

abstract object implements integration of massless particle through vector field More...

#include <vtkStreamer.h>

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List of all members.

Classes

class  StreamArray
class  StreamPoint

Public Types

typedef vtkPolyDataAlgorithm Superclass

Public Member Functions

virtual int IsA (const char *type)
vtkStreamerNewInstance () const
void PrintSelf (ostream &os, vtkIndent indent)
void SetStartLocation (vtkIdType cellId, int subId, double pcoords[3])
vtkIdType GetStartLocation (int &subId, double pcoords[3])
void SetStartPosition (double x[3])
void SetStartPosition (double x, double y, double z)
doubleGetStartPosition ()
void SetSourceConnection (vtkAlgorithmOutput *algOutput)
virtual void SetNumberOfThreads (int)
virtual int GetNumberOfThreads ()
virtual void SetSavePointInterval (double)
virtual double GetSavePointInterval ()
void SetStartLocation (vtkIdType cellId, int subId, double r, double s, double t)
void SetSourceData (vtkDataSet *source)
vtkDataSetGetSource ()
virtual void SetMaximumPropagationTime (double)
virtual double GetMaximumPropagationTime ()
virtual void SetIntegrationDirection (int)
virtual int GetIntegrationDirection ()
void SetIntegrationDirectionToForward ()
void SetIntegrationDirectionToBackward ()
void SetIntegrationDirectionToIntegrateBothDirections ()
const char * GetIntegrationDirectionAsString ()
virtual void SetIntegrationStepLength (double)
virtual double GetIntegrationStepLength ()
virtual void SetSpeedScalars (int)
virtual int GetSpeedScalars ()
virtual void SpeedScalarsOn ()
virtual void SpeedScalarsOff ()
virtual void SetOrientationScalars (int)
virtual int GetOrientationScalars ()
virtual void OrientationScalarsOn ()
virtual void OrientationScalarsOff ()
virtual void SetTerminalSpeed (double)
virtual double GetTerminalSpeed ()
virtual void SetVorticity (int)
virtual int GetVorticity ()
virtual void VorticityOn ()
virtual void VorticityOff ()
void SetIntegrator (vtkInitialValueProblemSolver *)
virtual
vtkInitialValueProblemSolver
GetIntegrator ()
virtual void SetEpsilon (double)
virtual double GetEpsilon ()

Static Public Member Functions

static int IsTypeOf (const char *type)
static vtkStreamerSafeDownCast (vtkObjectBase *o)

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
void Integrate (vtkDataSet *input, vtkDataSet *source)
void InitializeThreadedIntegrate ()
virtual int FillInputPortInformation (int port, vtkInformation *info)
 vtkStreamer ()
 ~vtkStreamer ()
virtual vtkIdType GetNumberOfStreamers ()
StreamArrayGetStreamers ()

Static Protected Member Functions

static VTK_THREAD_RETURN_TYPE ThreadedIntegrate (void *arg)

Protected Attributes

int StartFrom
vtkIdType StartCell
int StartSubId
double StartPCoords [3]
double StartPosition [3]
StreamArrayStreamers
vtkIdType NumberOfStreamers
double MaximumPropagationTime
int IntegrationDirection
double IntegrationStepLength
int Vorticity
double TerminalSpeed
int SpeedScalars
int OrientationScalars
vtkInitialValueProblemSolverIntegrator
double Epsilon
double SavePointInterval
vtkMultiThreaderThreader
int NumberOfThreads

Friends

class StreamArray

Detailed Description

abstract object implements integration of massless particle through vector field

vtkStreamer is a filter that integrates a massless particle through a vector field. The integration is performed using second order Runge-Kutta method. vtkStreamer often serves as a base class for other classes that perform numerical integration through a vector field (e.g., vtkStreamLine).

Note that vtkStreamer can integrate both forward and backward in time, or in both directions. The length of the streamer is controlled by specifying an elapsed time. (The elapsed time is the time each particle travels.) Otherwise, the integration terminates after exiting the dataset or if the particle speed is reduced to a value less than the terminal speed.

vtkStreamer integrates through any type of dataset. As a result, if the dataset contains 2D cells such as polygons or triangles, the integration is constrained to lie on the surface defined by the 2D cells.

The starting point of streamers may be defined in three different ways. Starting from global x-y-z "position" allows you to start a single streamer at a specified x-y-z coordinate. Starting from "location" allows you to start at a specified cell, subId, and parametric coordinate. Finally, you may specify a source object to start multiple streamers. If you start streamers using a source object, for each point in the source that is inside the dataset a streamer is created.

vtkStreamer implements the integration process in the Integrate() method. Because vtkStreamer does not implement the Execute() method that its superclass (i.e., Filter) requires, it is an abstract class. Its subclasses implement the execute method and use the Integrate() method, and then build their own representation of the integration path (i.e., lines, dashed lines, points, etc.).

See also:
vtkStreamLine vtkDashedStreamLine vtkStreamPoints

Definition at line 65 of file vtkStreamer.h.


Member Typedef Documentation

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkStreamLine, vtkDashedStreamLine, and vtkStreamPoints.

Definition at line 68 of file vtkStreamer.h.


Constructor & Destructor Documentation

vtkStreamer::vtkStreamer ( ) [protected]

Construct object to start from position (0,0,0); integrate forward; terminal speed 0.0; vorticity computation off; integrations step length 0.2; and maximum propagation time 100.0.

vtkStreamer::~vtkStreamer ( ) [protected]

Construct object to start from position (0,0,0); integrate forward; terminal speed 0.0; vorticity computation off; integrations step length 0.2; and maximum propagation time 100.0.


Member Function Documentation

static int vtkStreamer::IsTypeOf ( const char *  name) [static]

Return 1 if this class type 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.

Reimplemented in vtkStreamLine, vtkDashedStreamLine, and vtkStreamPoints.

virtual int vtkStreamer::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.

Reimplemented in vtkStreamLine, vtkDashedStreamLine, and vtkStreamPoints.

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkStreamLine, vtkDashedStreamLine, and vtkStreamPoints.

virtual vtkObjectBase* vtkStreamer::NewInstanceInternal ( ) const [protected, virtual]

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkStreamLine, vtkDashedStreamLine, and vtkStreamPoints.

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkStreamLine, vtkDashedStreamLine, and vtkStreamPoints.

void vtkStreamer::PrintSelf ( ostream &  os,
vtkIndent  indent 
) [virtual]

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.

Reimplemented in vtkStreamLine, vtkDashedStreamLine, and vtkStreamPoints.

void vtkStreamer::SetStartLocation ( vtkIdType  cellId,
int  subId,
double  pcoords[3] 
)

Specify the start of the streamline in the cell coordinate system. That is, cellId and subId (if composite cell), and parametric coordinates.

void vtkStreamer::SetStartLocation ( vtkIdType  cellId,
int  subId,
double  r,
double  s,
double  t 
)

Specify the start of the streamline in the cell coordinate system. That is, cellId and subId (if composite cell), and parametric coordinates.

vtkIdType vtkStreamer::GetStartLocation ( int subId,
double  pcoords[3] 
)

Get the starting location of the streamline in the cell coordinate system.

Specify the start of the streamline in the global coordinate system. Search must be performed to find initial cell to start integration from.

Specify the start of the streamline in the global coordinate system. Search must be performed to find initial cell to start integration from.

Get the start position in global x-y-z coordinates.

Specify the source object used to generate starting points.

Specify the source object used to generate starting points.

Specify the source object used to generate starting points by making a pipeline connection

virtual void vtkStreamer::SetMaximumPropagationTime ( double  ) [virtual]

Specify the maximum length of the Streamer expressed in elapsed time.

Specify the maximum length of the Streamer expressed in elapsed time.

virtual void vtkStreamer::SetIntegrationDirection ( int  ) [virtual]

Specify the direction in which to integrate the Streamer.

Specify the direction in which to integrate the Streamer.

Specify the direction in which to integrate the Streamer.

Definition at line 122 of file vtkStreamer.h.

Specify the direction in which to integrate the Streamer.

Definition at line 124 of file vtkStreamer.h.

Specify the direction in which to integrate the Streamer.

Definition at line 126 of file vtkStreamer.h.

Return the integration direction as a character string.

Definition at line 333 of file vtkStreamer.h.

virtual void vtkStreamer::SetIntegrationStepLength ( double  ) [virtual]

Specify a nominal integration step size (expressed as a fraction of the size of each cell). This value can be larger than 1.

Specify a nominal integration step size (expressed as a fraction of the size of each cell). This value can be larger than 1.

virtual void vtkStreamer::SetSpeedScalars ( int  ) [virtual]

Turn on/off the creation of scalar data from velocity magnitude. If off, and input dataset has scalars, input dataset scalars are used.

virtual int vtkStreamer::GetSpeedScalars ( ) [virtual]

Turn on/off the creation of scalar data from velocity magnitude. If off, and input dataset has scalars, input dataset scalars are used.

virtual void vtkStreamer::SpeedScalarsOn ( ) [virtual]

Turn on/off the creation of scalar data from velocity magnitude. If off, and input dataset has scalars, input dataset scalars are used.

virtual void vtkStreamer::SpeedScalarsOff ( ) [virtual]

Turn on/off the creation of scalar data from velocity magnitude. If off, and input dataset has scalars, input dataset scalars are used.

virtual void vtkStreamer::SetOrientationScalars ( int  ) [virtual]

Turn on/off the creation of scalar data from vorticity information. The scalar information is currently the orientation value "theta" used in rotating stream tubes. If off, and input dataset has scalars, then input dataset scalars are used, unless SpeedScalars is also on. SpeedScalars takes precedence over OrientationScalars.

virtual int vtkStreamer::GetOrientationScalars ( ) [virtual]

Turn on/off the creation of scalar data from vorticity information. The scalar information is currently the orientation value "theta" used in rotating stream tubes. If off, and input dataset has scalars, then input dataset scalars are used, unless SpeedScalars is also on. SpeedScalars takes precedence over OrientationScalars.

virtual void vtkStreamer::OrientationScalarsOn ( ) [virtual]

Turn on/off the creation of scalar data from vorticity information. The scalar information is currently the orientation value "theta" used in rotating stream tubes. If off, and input dataset has scalars, then input dataset scalars are used, unless SpeedScalars is also on. SpeedScalars takes precedence over OrientationScalars.

virtual void vtkStreamer::OrientationScalarsOff ( ) [virtual]

Turn on/off the creation of scalar data from vorticity information. The scalar information is currently the orientation value "theta" used in rotating stream tubes. If off, and input dataset has scalars, then input dataset scalars are used, unless SpeedScalars is also on. SpeedScalars takes precedence over OrientationScalars.

virtual void vtkStreamer::SetTerminalSpeed ( double  ) [virtual]

Set/get terminal speed (i.e., speed is velocity magnitude). Terminal speed is speed at which streamer will terminate propagation.

virtual double vtkStreamer::GetTerminalSpeed ( ) [virtual]

Set/get terminal speed (i.e., speed is velocity magnitude). Terminal speed is speed at which streamer will terminate propagation.

virtual void vtkStreamer::SetVorticity ( int  ) [virtual]

Turn on/off the computation of vorticity. Vorticity is an indication of the rotation of the flow. In combination with vtkStreamLine and vtkTubeFilter can be used to create rotated tubes. If vorticity is turned on, in the output, the velocity vectors are replaced by vorticity vectors.

virtual int vtkStreamer::GetVorticity ( ) [virtual]

Turn on/off the computation of vorticity. Vorticity is an indication of the rotation of the flow. In combination with vtkStreamLine and vtkTubeFilter can be used to create rotated tubes. If vorticity is turned on, in the output, the velocity vectors are replaced by vorticity vectors.

virtual void vtkStreamer::VorticityOn ( ) [virtual]

Turn on/off the computation of vorticity. Vorticity is an indication of the rotation of the flow. In combination with vtkStreamLine and vtkTubeFilter can be used to create rotated tubes. If vorticity is turned on, in the output, the velocity vectors are replaced by vorticity vectors.

virtual void vtkStreamer::VorticityOff ( ) [virtual]

Turn on/off the computation of vorticity. Vorticity is an indication of the rotation of the flow. In combination with vtkStreamLine and vtkTubeFilter can be used to create rotated tubes. If vorticity is turned on, in the output, the velocity vectors are replaced by vorticity vectors.

virtual void vtkStreamer::SetNumberOfThreads ( int  ) [virtual]
virtual int vtkStreamer::GetNumberOfThreads ( ) [virtual]
virtual void vtkStreamer::SetSavePointInterval ( double  ) [virtual]

Set/get the integrator type to be used in the stream line calculation. The object passed is not actually used but is cloned with NewInstance by each thread/process in the process of integration (prototype pattern). The default is 2nd order Runge Kutta.

Set/get the integrator type to be used in the stream line calculation. The object passed is not actually used but is cloned with NewInstance by each thread/process in the process of integration (prototype pattern). The default is 2nd order Runge Kutta.

virtual void vtkStreamer::SetEpsilon ( double  ) [virtual]

A positive value, as small as possible for numerical comparison. The initial value is 1E-12.

virtual double vtkStreamer::GetEpsilon ( ) [virtual]

A positive value, as small as possible for numerical comparison. The initial value is 1E-12.

void vtkStreamer::Integrate ( vtkDataSet input,
vtkDataSet source 
) [protected]
static VTK_THREAD_RETURN_TYPE vtkStreamer::ThreadedIntegrate ( void *  arg) [static, protected]
virtual vtkIdType vtkStreamer::GetNumberOfStreamers ( ) [protected, virtual]

These methods were added to allow access to these variables from the threads.

StreamArray* vtkStreamer::GetStreamers ( ) [inline, protected]

These methods were added to allow access to these variables from the threads.

Definition at line 317 of file vtkStreamer.h.

virtual int vtkStreamer::FillInputPortInformation ( int  port,
vtkInformation info 
) [protected, virtual]

Fill the input port information objects for this algorithm. This is invoked by the first call to GetInputPortInformation for each port so subclasses can specify what they can handle.

Reimplemented from vtkPolyDataAlgorithm.


Friends And Related Function Documentation

friend class StreamArray [friend]

Definition at line 240 of file vtkStreamer.h.


Member Data Documentation

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