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

[Burlen Loring]

did you try including the code from the trace that set the opacity 
values? try adding that after the lut is set.

> wavelet1Display.ScalarOpacityUnitDistance = 1.7320508075688779
> rTDataPWF = GetOpacityTransferFunction('RTData')
> rTDataPWF.Points = [37.35310363769531, 0.0, 0.5, 0.0, 
> 186.72914123535156, 1.0, 0.5, 0.0]


On 03/17/2015 04:48 PM, Scott, W Alan wrote:
>
> Excellent!
>
> One question – my user may want to use Opacity mapping.  The code 
> below changes the Mapping Data view, removing the Opacity part of the 
> view.  Is there a way to return it to normal, enabling Opacity Mapping?
>
> Thanks
>
> *From:*Burlen Loring [mailto:bloring at lbl.gov]
> *Sent:* Tuesday, March 17, 2015 2:17 PM
> *To:* Scott, W Alan; paraview at paraview.org
> *Subject:* Re: [EXTERNAL] Re: [Paraview] Trace recorder and presets 
> (color table)
>
> 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
>     <mailto: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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