From: Peterson J (
Date: Thu Oct 03 2013 - 10:40:50 CDT

Hello VMD Users,

I am trying to calculate the angle between two domains of my protein. I
have calculated the inertia for both domains which provided me the center
of mass and the principal axes of each domain. But I have a problem
calculating the angle using the two principal axes. The 'measure angle'
asks for three atom indices.

How do I measure it?