[Paraview] Using time in Python script

[Utkarsh Ayachit]

You need to call either RenderView1.StillRender() or
RenderView1.Update() to ensure that the view updates all pipelines
shown in it after changing the AnimationTime.

Utkarsh

On Mon, Aug 11, 2014 at 1:55 AM, Elaine Tang <lingdeer at gmail.com> wrote:
> Hi,
>
> I have data in time that has time points like
> {0.02124,0.04248,0.06372,0.08496, etc.}
>
> I wrote a python script to loop through these time points with time
> increment of 0.02124 and export as .csv.
>
> ----------------------------------------------
>
> for x in range(1, 4):
>
> currentT = x*deltaT
> AnimationScene1 = GetAnimationScene()
> RenderView1 = GetRenderView()
> AnimationScene1.AnimationTime = currentT
> RenderView1.ViewTime = currentT
> RenderView1.CacheKey = currentT
> RenderView1.UseCache = 1
> RenderView1.UseCache = 0
>
> SetActiveSource(data)
> writer = CreateWriter("output.csv")
> writer.FieldAssociation = "Points"
> writer.UpdatePipeline()
> del writer
>
> Render()
>
> ------------------------------------------
>
> When I played the macro, some time points were not correctly read. (e.g.
> the 4th time point spreadsheet saved data that belong to the 3rd time
> point.)
>
> I used "start trace" to see how paraview handles time, and here is what I
> caught:
>
> --------------------------------------------------------
> try: paraview.simple
> except: from paraview.simple import *
> paraview.simple._DisableFirstRenderCameraReset()
>
> AnimationScene1 = GetAnimationScene()
> RenderView1 = GetRenderView()
> AnimationScene1.AnimationTime = 0.021239999681711197
>
> RenderView1.ViewTime = 0.021239999681711197
> RenderView1.CacheKey = 0.021239999681711197
> RenderView1.UseCache = 1
>
> AnimationScene1.AnimationTime = 0.042479999363422394
>
> RenderView1.ViewTime = 0.042479999363422394
> RenderView1.CacheKey = 0.042479999363422394
> RenderView1.UseCache = 1
>
> AnimationScene1.AnimationTime = 0.06372000277042389
>
> RenderView1.ViewTime = 0.06372000277042389
> RenderView1.CacheKey = 0.06372000277042389
> RenderView1.UseCache = 1
>
> AnimationScene1.AnimationTime = 0.08495999872684479
>
> RenderView1.ViewTime = 0.08495999872684479
> RenderView1.CacheKey = 0.08495999872684479
> RenderView1.UseCache = 1
>
> RenderView1.UseCache = 0
>
> Render()
> --------------------------------------------------------
> Then I realized, if I tried to read data at 0.08496, it will read data from
> the previous time point instead. If I explicitly specify in my script to
> read data at time 0.08495999872684479, then it will read the correct data.
>
> Anyone has any insights?
> Thanks in advance!!!
>
> --
> Elaine
>
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