[Paraview] [EXTERNAL] Re: Trace recorder and presets (color table)

Tue Mar 17 16:16:45 EDT 2015

Hi Alan,

The verbosity of the trace can be confusing, 90% of it is unnecessary, 
and can be removed. Here's how it looks in your example with unnecessary 
stuff removed and the 3 lines added to change the lut by name.

#### import the simple module from the paraview
from paraview.simple import *

#### disable automatic camera reset on 'Show'
paraview.simple._DisableFirstRenderCameraReset()

# create a new 'Wavelet'
wavelet1 = Wavelet()

# get active view
renderView1 = GetActiveViewOrCreate('RenderView')

# uncomment following to set a specific view size
# renderView1.ViewSize = [856, 797]

# show data in view
wavelet1Display = Show(wavelet1, renderView1)

# change representation type
wavelet1Display.SetRepresentationType('Surface')

*# change lookup table**
**wavelet1Display.ColorArrayName = 'RTData'**
**w_arr = wavelet1.PointData.GetArray('RTData')**
**wavelet1Display.LookupTable = AssignLookupTable(w_arr, 'Rainbow 
Blended White')*

# show color bar/color legend
wavelet1Display.SetScalarBarVisibility(renderView1, True)

# reset view to fit data
renderView1.ResetCamera()

#### uncomment the following to render all views
# RenderAllViews()
# alternatively, if you want to write images, you can use 
SaveScreenshot(...).

On 03/17/2015 11:46 AM, Scott, W Alan wrote:
>
> Thanks Burlen!
>
> Obviously, my ParaView Python fu is weak.  I tried to merge this code 
> into Python created by the trace recorder, but couldn’t. Say a person 
> does the following (which is sort of what my customer is doing) :
>
> ·Trace recorder on.
>
> ·Wavelet. Apply.  Surface.  RTData.
>
> ·Color Editor/ Presets/ Blue to Red Rainbow.
>
> ·Trace Recorder off.
>
> The line setting Blue to Red Rainbow doesn’t get recorded.  What code 
> would I paste in there?
>
> Here is the incorrect trace:
>
> #### import the simple module from the paraview
>
> from paraview.simple import *
>
> #### disable automatic camera reset on 'Show'
>
> paraview.simple._DisableFirstRenderCameraReset()
>
> # create a new 'Wavelet'
>
> wavelet1 = Wavelet()
>
> # get active view
>
> renderView1 = GetActiveViewOrCreate('RenderView')
>
> # uncomment following to set a specific view size
>
> # renderView1.ViewSize = [856, 797]
>
> # show data in view
>
> wavelet1Display = Show(wavelet1, renderView1)
>
> # trace defaults for the display properties.
>
> wavelet1Display.Representation = 'Outline'
>
> wavelet1Display.ColorArrayName = ['POINTS', '']
>
> wavelet1Display.ScalarOpacityUnitDistance = 1.7320508075688779
>
> wavelet1Display.Slice = 10
>
> # reset view to fit data
>
> renderView1.ResetCamera()
>
> # change representation type
>
> wavelet1Display.SetRepresentationType('Surface')
>
> # set scalar coloring
>
> ColorBy(wavelet1Display, ('POINTS', 'RTData'))
>
> # rescale color and/or opacity maps used to include current data range
>
> wavelet1Display.RescaleTransferFunctionToDataRange(True)
>
> # show color bar/color legend
>
> wavelet1Display.SetScalarBarVisibility(renderView1, True)
>
> # get color transfer function/color map for 'RTData'
>
> rTDataLUT = GetColorTransferFunction('RTData')
>
> rTDataLUT.RGBPoints = [37.35310363769531, 0.231373, 0.298039, 
> 0.752941, 112.04112243652344, 0.865003, 0.865003, 0.865003, 
> 186.72914123535156, 0.705882, 0.0156863, 0.14902]
>
> rTDataLUT.ScalarRangeInitialized = 1.0
>
> # get opacity transfer function/opacity map for 'RTData'
>
> rTDataPWF = GetOpacityTransferFunction('RTData')
>
> rTDataPWF.Points = [37.35310363769531, 0.0, 0.5, 0.0, 
> 186.72914123535156, 1.0, 0.5, 0.0]
>
> rTDataPWF.ScalarRangeInitialized = 1
>
> #### saving camera placements for all active views
>
> # current camera placement for renderView1
>
> renderView1.CameraPosition = [0.0, 0.0, 66.92130429902464]
>
> renderView1.CameraParallelScale = 17.320508075688775
>
> #### uncomment the following to render all views
>
> # RenderAllViews()
>
> # alternatively, if you want to write images, you can use 
> SaveScreenshot(...).
>
> *From:*Burlen Loring [mailto:bloring at lbl.gov]
> *Sent:* Monday, March 16, 2015 4:45 PM
> *To:* Scott, W Alan; paraview at paraview.org
> *Subject:* [EXTERNAL] Re: [Paraview] Trace recorder and presets (color 
> table)
>
> Hi Alan,
>
> You can use the AssignLookupTable function to reference builtin lookup 
> tables by name. For example see code between # marks below. There are 
> a few other conveniences for working with the builtin tables as well, 
> see this recipe 
> <http://www.paraview.org/Wiki/ParaView/Python/Lookup_tables>
>
> w = Wavelet()
> w_rep = Show(w)
> w_rep.Representation = 'Surface'
> #
> w_rep.ColorArrayName = 'RTData'
> w_arr = w.PointData.GetArray('RTData')
> w_rep.LookupTable = AssignLookupTable(w_arr, 'Rainbow Blended White')
> #
> Render().ResetCamera()
>
> Burlen
>
> On 03/16/2015 03:14 PM, Scott, W Alan wrote:
>
>     I have a user that needs to change the ParaView preset from
>     default (cool to warm) to another ParaView preset (Blue to Red
>     Rainbow).  He wants to do this in a python trace.  So, he used the
>     trace recorder to record his steps.  Unfortunately, changing
>     presets is not recorded with the trace recorder.
>
>     I have written this issue up as bug number
>     http://www.paraview.org/Bug/view.php?id=15116, but need to give
>     the user the code that would have/ should have been produced. 
>     Does anyone have the python code that changes presets?
>
>     Thanks all!
>
>     Alan
>
>
>
>
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