Interactive Molecule Dynamics (IMD) facilitates a direct communcation
between VMD and a molecular dynamics program, e.g. NAMD. The primary
purpose of this link is to allow users to send forces to atoms or groups
of atoms in a running simulation, and allow the simulation to efficiently
send coordinates back to VMD for display.
IMD can be performed with a mouse interface, but excels when performed
with a haptic device for interactive force feedback.
Click on the thumbnail for an image of using IMD to study the
gramicidin A system. In this study, a haptic device is used to pull
a sodium ion through the channel formed in the lipid membrane by the
protein. Analysis of the applied force
gives information about the potential energy profile in the channel.
Step-by-step instructions for performing IMD.
The technical details of IMD.