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using irregularly spaced coordinates with ray-casting in iVolume [message #65540]

Tue, 10 March 2009 11:24

brian.niebergal@gmail is currently offline

brian.niebergal@gmail
Messages: 2
Registered: March 2009

Junior Member

Hello everyone.

I've seen a few similar posts to this one, but there doesn't seem to
be a good (easy) answer that I can understand. :)

How does one use irregularly spaced (xyz) coordinates with the
IDLgrVolume ray-casting volume renderer?
I haven't used any of IDL's 3D features before and so I'm kind of
lost. Normally, using the "contour" command I would type something
like:

contour,3Ddata_slice,dim_x,dim_y

where dim_x and dim_y are my irregularly spaced coordinates.

If it helps, my data isn't completely irregular, that is to say there
is an equation that dictates the spacing between adjacent coordinate
points (involves a step function half-way through the data though).

I realize the algorithm for accomplishing this with ray-casting is not
trivial, but if anyone renders hydrodynamical simulations, using
adaptive mesh refinement, they must also need this feature.

It seems this is related to why the "logarithmic axis" option in axis
properties is greyed out?

Thank you,
- Brian Niebergal
PhD Student
University of Calgary
www.capca.ucalgary.ca/~bniebergal/

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[Message index]

		using irregularly spaced coordinates with ray-casting in iVolume By: brian.niebergal@gmail on Tue, 10 March 2009 11:24
		Re: using irregularly spaced coordinates with ray-casting in iVolume By: brian.niebergal@gmail on Wed, 11 March 2009 11:19

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