| Re: Basics of SHADE_VOLUME [message #43358] |
Thu, 07 April 2005 14:41  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Leslie Welser writes:
> Actually, I don't think your 3-d scatter plot will work for me in this
> case (although I have used it before on another project, and it worked
> great!). The reason is that what I have is actually a 3-d array which
> represents a wavefunction in space, phi=dblarr(192,192,192). It is 3-d
> because at each {x,y,z} point, there is a magnitude for phi. So I
> guess the problem is really that I'm trying to represent a 4-d surface
> (3 dimensions for the x,y,z and 1 for the actual value of the array).
> I thought that using shade_volume would work for this, since it accepts
> a 3-d array as input. But the result looks about how you described it.
> I noticed that on your website, you have an example (MRI images) where
> you said to choose an isosurface of 50 and then you said that "the
> surface will enclose the volume values greater than 50". That's where
> I got the crazy idea to set the isosurface value as the minimum value
> of my dataset. But I think there is still something that I'm
> missing....
Well, I'm still unclear what it is you hope to
visualize, too. How about putting the volume into
something like SLICE3? Then you could look at slices
through the volume. Or, you could treat this as we
do with medical image volumes and look at the three
orthogonal slices in three separate windows.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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