Thank you,

One more confirm. Is the "t" in ray["t"] the built-in field (like Density) or the derived field that I need to make in my own?

Junhwan

On Thu, Jan 10, 2013 at 10:39 PM, Matthew Turk <matthewturk@gmail.com> wrote:

http://lists.spacepope.org/pipermail/yt-users-spacepope.org/2012-August/002863.html

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Jun-Hwan Choi, Ph.D.
Department of Physics and Astronomy, University of Kentucky
Tel: (859) 897-6737 Fax: (859) 323-2846
Email: jhchoi@pa.uky.edu URL: http://www.pa.uky.edu/~jhchoi
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