[vtkusers] Double Precision Scalars, what to do?

[Gopalakrishnan, Gowri]

I came across this with vtkpolydata few days ago. There you can specify
double but internally in the vtk code i found a cast to float. No one
(except Karin) replied to me on that question. So I guessed it is a problem.
I then scaled my data to get around the problem. 
There is a vtkdoublearray (you can see the example from Karin in the posting
under the title precision) which is useful. 

If you can stick to float. Sorry cannot help you more - it is a problem

regards
Gowri


-----Original Message-----
From: Alan Shih [mailto:feigee at hotmail.com]
Sent: Tuesday, October 30, 2001 8:01 PM
To: vtkusers at public.kitware.com
Subject: [vtkusers] Double Precision Scalars, what to do?


Hi,

I searched vtk mailing list archives but couldn't find satisfactory answers 
to it, so please allow me to post it here.

I have a dataset with 6 scalars in it.  One of the scalar minmax={1.0E-14, 
1.0E-12}.  When I plotted the scalar, it is basically monocolor.  I think 
the actor is thinking of all values are 0.0.

I looked at vtkScalars, there is no way for us to put doubles into it.  What

should we do then?  Any compilation flags or things of that sort that allows

us to handle double-precision data properly?

Thanks for your pointers.

Alan

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