[Paraview] Changing colormap parameters in a Catalyst script

[Cory Quammen]

Mattheiu,

For rescaling when your data range is known, use:

a1_dbz_PiecewiseFunction.RescaleTransferFunction(min, max)
a1_dbz_PVLookupTable.RescaleTransferFunction(min, max)

When it is unknown, you can use

pipelineObject = GetActiveSource()
display = GetDisplayProperties(pipelineObject)
display.RescaleTransferFunctionToDataRange(False)

You can change the False argument to True in the second line if you want
the rescaling to only extend the current range instead of possibly
shrinking it.

Hope that helps,
Cory


On Fri, Oct 30, 2015 at 2:59 PM, Dorier, Matthieu <mdorier at anl.gov> wrote:

> Hi,
>
> I have generated a Catalyst python script that produces a colormap on a
> slice of a 3D rectilinear grid. I would like to use the same script for
> another variable of the simulation, but the range of data is not the same.
> How can I adapt the script, both in case where I know the new data range,
> and in case I don't know and want the colormap to simply figure it out?
>
> I believe the part of the script that deals with that is as follows:
>
> a1_dbz_PiecewiseFunction = CreatePiecewiseFunction(
> Points=[-36.903831481933594, 0.0, 0.5, 0.0, 57.036045074462891, 1.0, 0.5,
> 0.0] )
>
> a1_dbz_PVLookupTable = GetLookupTableForArray( "dbz", 1,
> RGBPoints=[-36.903831481933594, 0.23000000000000001, 0.29899999999999999,
> 0.754, 10.066106796264648, 0.86499999999999999, 0.86499999999999999,
> 0.86499999999999999, 57.036045074462891, 0.70599999999999996, 0.016,
> 0.14999999999999999], VectorMode='Magnitude', NanColor=[0.25, 0.0, 0.0],
> ScalarOpacityFunction=a1_dbz_PiecewiseFunction, ColorSpace='Diverging',
> ScalarRangeInitialized=1.0 )
>
> But I don't know how to adapt it.
>
> Thanks,
>
> Matthieu
>
>
>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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