[Paraview] [EXTERNAL] Re: Streaklines

[Pradeep Jha]

Hi Andy,

I followed your instructions and have had some success but not completely :)

Here is what I did:
1) My input data has a time-dependent X velocity and a Y velocity and the
mesh information
2) I use the "Calculator" tool to create a "velocity" vector using
"x_velocity*iHat + y_velocity*jHat"
3) With "Calculator1" active, I click on Streakline (Streakline filter
doesn't show up with my initial data as, I guess, there are no vector
fields there)
4) A pop-up window comes: for both the "Input" and "Seed Source" I choose
"Calculator1"
5) Then "Streakline1" appears in the pipeline. I change Termination time to
a non zero value. With the "Calculator1" and "Streakline1" "eye" activated
in the pipeline, I click on the play button
6) I don't see any streaklines. Only the velocity contour movie continue
(and much slowly than it does without the streakline filter on).
7) I don't see the option of where can I decide the point of origin of the
streaklines.

Any sugggestions?
Thanks
Pradeep

On 9 December 2014 at 15:32, Andy Bauer <andy.bauer at kitware.com> wrote:
>
> Hi,
>
> The streakline filter requires a time dependent input as well as a vector
> field input (probably point data required but didn't verify this). After
> that, an input needs to be created for the seeds of the streaklines (i.e.
> the location that the streaklines go through). Select the time dependent
> input and then create the StreakLine filter. Then a dialog box will come up
> to set the seed source (Input should be set to the time dependent input and
> Seed Source should be set to the source to use for the streaklines). The
> seeds are the points in the Seed Source. Next, in the Properties panel
> you'll probably want to set Termination Time to something other than 0.0
> since the streakline filter will integrate forward in time to that value.
> Thus, if it's 0.0 and the first time step is at 0.0 it will seem like the
> filter didnt' do anything. The Force Reinjection Every NSteps is
> essentially the resolution of the streakline.
>
> Note that PV's implementation of streaklines only does forward integration
> in time.
>
> Regards,
> Andy
>
> On Tue, Dec 9, 2014 at 10:58 AM, Pradeep Jha <pradeep.kumar.jha at gmail.com>
> wrote:
>
>> I am also trying to figure out the streakline filter. Still don't
>> understand how to make it function :)
>>
>> On 5 December 2014 at 14:10, Scott, W Alan <wascott at sandia.gov> wrote:
>>
>>>  Andy,
>>>
>>> Mind giving me an example of how to run this streakline filter?  I have
>>> never used it before.
>>>
>>>
>>>
>>> Thanks!
>>>
>>>
>>>
>>> Alan
>>>
>>>
>>>
>>> *From:* ParaView [mailto:paraview-bounces at paraview.org] *On Behalf Of *Andy
>>> Bauer
>>> *Sent:* Friday, December 05, 2014 12:06 PM
>>> *To:* Pradeep Jha
>>> *Cc:* paraview at paraview.org
>>> *Subject:* [EXTERNAL] Re: [Paraview] Streaklines
>>>
>>>
>>>
>>> ParaView does indeed have a StreakLine filter.
>>>
>>>
>>>
>>> On Fri, Dec 5, 2014 at 12:30 PM, Pradeep Jha <
>>> pradeep.kumar.jha at gmail.com> wrote:
>>>
>>> I have a unsteady 2D contour plot of a flow past a cylinder. Is it
>>> possible to plot the streaklines of a flow using Paraview? My solution file
>>> only contains the following data:
>>>
>>> U,V,W velocity and Pressure.
>>>
>>>
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>>
>
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