spring 1.0 ---------- REQUIREMENTS: VMD Version 1.1 or greater, use in orthographic mode DESCRIPTION: After an atom has been picked, call "spring". It generates a a mechanical spring from the location of the atom outward toward the eye position. By default the spring has a radius of 3 A and a length of 20 Angstroms. These and other parameters can be altered in well-labelled parts of the procedure if desired. This script is useful to those who do simulated micromanipulation experiments. It comes in handy when explaining the method by which parts of the protein were pulled. PROCEDURES: spring - be sure to pick an atom before calling this EXAMPLE OUTPUT Sample showing a spring added to an atom of the alanin molecule. This image has been rotated by 90 degrees to make the spring fully visible. DOWNLOAD THE FILE: spring.tcl AUTHOR: Willy Wriggers (wriggers@ks.uiuc.edu)