paraview.simple.EvenlySpacedStreamlines2D(*input, **params)

This filter generates evenly spaced streamlines in a 2D vector field from a start position. Production of streamlines terminates if a streamline crosses the exterior boundary of the input dataset (ReasonForTermination=1), an initialization issue (ReasonForTermination=2), computing an unexpected value (ReasonForTermination=3), reached the Maximum Streamline Length input value (ReasonForTermination=4), reached the Maximum Steps input value (ReasonForTermination=5), velocity was lower than the Terminal Speed input value (ReasonForTermination=6), a streamline formed a loop (ReasonForTermination=7), and the streamline was too close to other streamlines (ReasonForTermination=8). This filter operates on a 2D dataset aligned with plane XY with point-centered vectors aligned with plane XY. The output is polygonal data containing polylines.

Data Descriptors


Loops are considered closed if the have two points at distance less than this. This is expressed in IntegrationStepUnit.


Specify whether to compute vorticity.


This property specifies the initial integration step size. For non-adaptive integrators (Runge-Kutta 2 and Runge-Kutta 4), it is fixed (always equal to this initial value) throughout the integration.


This property specifies the input to the filter.


This property specifies the unit for Initial integration step size. The Length unit refers to the arc length that a particle travels/advects within a single step. The Cell Length unit represents the step size as a number of cells.


This property determines which integrator (with increasing accuracy) to use for creating streamlines.


This property determines which interpolator to use for evaluating the velocity vector field. The first is faster though the second is more robust in locating cells during streamline integration.


This property specifies the maximum number of steps, beyond which streamline integration is terminated.


Specify the separating distance between streamlines expressed in IntegrationStepUnit.


Specifies SeparatingDistanceRatio. If streamlines get closer than SeparatingDistance * SeparatingDistanceRatio to other streamlines integration stops.


Specify the starting point (seed) of the first streamline in the global coordinate system.


This property specifies the terminal speed, below which particle advection/integration is terminated.


This property contains the name of the vector array from which to generate streamlines.

Data Descriptors inherited from Proxy


dictionary for instance variables (if defined)


list of weak references to the object (if defined)


Initialize = aInitialize(self, connection=None, update=True)

Methods inherited from SourceProxy


Called when the filename of a source proxy is changed.


Returns the associated cell data information.

GetDataInformation(self, idx=None)

This method returns a DataInformation wrapper around a vtkPVDataInformation


Returns the associated cell data information.


Returns the associated point data information.

UpdatePipeline(self, time=None)

This method updates the server-side VTK pipeline and the associated data information. Make sure to update a source to validate the output meta-data.


This method updates the meta-data of the server-side VTK pipeline and the associated information properties

__getitem__(self, idx)

Given a slice, int or string, returns the corresponding output port

Methods inherited from Proxy

GetProperty(self, name)

Given a property name, returns the property object.

GetPropertyValue(self, name)

Returns a scalar for properties with 1 elements, the property itself for vectors.

InitializeFromProxy(self, aProxy, update=True)

Constructor. Assigns proxy to self.SMProxy, updates the server object as well as register the proxy in _pyproxies dictionary.


Returns a list of all property names on this proxy.

SetPropertyWithName(self, pname, arg)

Generic method for setting the value of a property.


Destructor. Cleans up all observers as well as remove the proxy from the _pyproxies dictionary

__eq__(self, other)

Returns true if the underlying SMProxies are the same.

__getattr__(self, name)

With the exception of a few overloaded methods, returns the SMProxy method


Return hash(self).

__init__(self, **args)

Default constructor. It can be used to initialize properties by passing keyword arguments where the key is the name of the property. In addition registrationGroup and registrationName (optional) can be specified (as keyword arguments) to automatically register the proxy with the proxy manager.


Creates an iterator for the properties.

__ne__(self, other)

Returns false if the underlying SMProxies are the same.

__setattr__(self, name, value)

Implement setattr(self, name, value).

add_attribute(self, name, value)

For the full list of servermanager proxies, please refer to Available readers, sources, writers, filters and animation cues