[Paraview] colormap for logarithmic quantities

[John Doe]

In semiconductor devices, the net doping is a signed quantity which
can very exponentially.  It is typical in most device simulation
packages as it refers to the signed number of donors (positive) and
acceptors (negative).

Other candidates for a colormap options would be a "Use log of the
absolute value", or even "Use asinh scale".

Regards,

Juan

On Tue, Jul 8, 2008 at 1:23 PM, Kent Eschenberg <eschenbe at psc.edu> wrote:
> That would prevent the error but would it make sense?
>
> Kent
> Pittsburgh Supercomputing Center
>
> John Doe wrote:
>>
>> When I try to view a color map logarithmically, I get the following error:
>> ERROR: In
>> /home/berk/Work/ReleaseBuilds/ParaView3/VTK/Common/vtkLookupTable.cxx,
>> line 120
>> vtkLookupTable (0x8ff2ae0): Bad table range for log scale: [-1e+15,
>> 9.999e+18], adjusting to [1, 10]
>>
>> Would it be reasonable to request that the log option for the colormap
>> takes the absolute value of the quantity for which the log is taken?
>>
>> Thanks,
>>
>> Juan
>