Well my first answer is to ask you to check if you were passing the opacity output of Colormap to the opacity input of Color, as what you are doing should work just as you want, if so.
I created a test program that shows what you want
Donna L. Gresh, Ph.D.
Optimization and Mathematical Software Group
IBM T.J. Watson Research Center
(914) 945-2472
http://www.research.ibm.com/people/g/donnagresh
[EMAIL PROTECTED]
| [EMAIL PROTECTED] (Michael A. Miller)
Sent by: [EMAIL PROTECTED] 06/04/2003 05:58 PM
|
To: [email protected] cc: Subject: [opendx-users] MapToPlane and colormap question |
Dear DX'ers,
I have a question regarding the opacity of a MapToPlane
I'm using a program based on what is generated by Import Data
grid file:
imported ---> MapToPlane ---> Color ---> Image
data | |
+--> ColorMap --+
I've set the ColorMap with constant hue and saturation and with
value and opacity high above a threshold and zero below that
threshold.
What I want is to display the colored part of the plane where the
imported data is above that threshold and to display nothing
where it is below threshold. What I'm getting is colors above
threshold and black below threshold.
Can anyone suggest a way to make the non-red part of the plane
entirely transparent? If not, is there another way to do what
I'm trying to do?
Mike
--
Michael A. Miller [EMAIL PROTECTED]
Imaging Sciences, Department of Radiology, IU School of Medicine
test.cfg
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test.net
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