Hi Eric, I wrote some code to do this for the LightRay tool. In your yt dir, have a look at yt/analysis_modules/light_ray/light_ray.py. Near the bottom, there is a function called periodic_distance. That should have what you need. Britton On Tue, Nov 30, 2010 at 12:24 PM, Eric Hallman <hallman13@gmail.com> wrote:

Hey, I am wondering if there is a simple routine in yt for calculating the minimum distance between two points in a periodic volume. Somehow I wind up writing a new routine for this every time I do it, and it requires a bunch of loops to check which distance is right. There is bound to be a faster easier way, wondering if anyone knows of one in yt, or has one they use that works fast.

thanks!

Eric Hallman Google Voice: (774) 469-0278 hallman13@gmail.com

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