Tutorial-l Mailing List

From: Brian Teague (teague_at_wisc.edu)
Date: Thu Oct 16 2008 - 18:27:10 CDT

Dear tutorials-l

I'm writing to comment on the sculptor.tcl file included with the files
for step 5 of the bionanotechnology tutorial. I was using it to bend
some DNA for an illustration I was creating and noticed that after
running sculptor.tcl, the resulting molecule's helix had the wrong
handedness (it was left-handed instead of right-handed.)

I am no TCL expert, and don't even pretend to understand the vector math
involved. The attached diff is completely inelegant, but it does
produce the correct results - ie, the molecule is curved correctly, and
maintains its right-handed helix. Perhaps whoever is maintaining the
bionanotech tutorial can figure out what the "right" fix is instead.

Regards,
Brian 

--
Brian Teague
teague_at_wisc.edu
The Laboratory for Molecular and Computational Genomics
If you're coasting, you're going downhill.
               -- L. W. Pierson

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