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Tcl Text Commands

Table 9.1: Summary of core text commands in VMD.
First Word Description
animate Play/Pause/Rewind a molecular trajectory.
atomselect Create atom selection objects for analysis.
axes Position a set of XYZ axes on the screen.
color Change the color assigned to molecules, or edit the colormap.
colorinfo (Tcl) Obtain color properties for various objects
display Change various aspects of the graphical display window.
exit, quit Quit VMD.
gettimestep Retrieve a timestep as a binary Tcl array (use for plugins)
help Display an on-line help file with an HTML viewer.
imd Control the connection to a remote simulation.
label Turn on/off labels for atoms, bonds, angles, dihedral angles, or springs.
light Control the light sources used to illuminate graphical objects.
logfile Turn on/off logging a VMD session to a file or the console.
material Create new material definitions and modify their settings.
mdffi MDFF density map synthesis and cross correlation commands
measure Measure properties of moleculear structures.
menu Control or query the on-screen GUI windows.
molecule or mol Load, modify, or delete a molecule.
molinfo Get information about a molecule or loaded file.
mouse Change the current state (mode) of the mouse.
parallel Execute commands in parallel on clusters or supercomputers.
play Start executing text commands from a specified file.
render Output the currently displayed image (scene) to a file.
rock Rotate the current scene continually at a specified rate.
rotate Rotate the current scene around a given axis by a certain angle.
scale Scale the current scene up or down.
stage Position a checkerboard stage on the screen.
tool Initialize and control external spatial tracking devices.
translate Translate the objects in the current scene.
user Add new keyboard commands.
vmdinfo (Tcl) Get information about this version of VMD
volmap Create volumetric data based on molecular information
wait Wait a number of seconds before reading another command. Animation continues.
sleep Sleep a number of seconds before reading another command. Animation is frozen.

All Tcl commands in VMD are composed of one or more words or phrases separated by white space, and terminated by a newline. In Tcl, a ``phrase'' is text surrounded by double quotes or by a matching set of open and close braces. The first word of each command indicates the general purpose for the command, and the following words specify the exact type of command to execute. Table 9.1 summarizes the text commands in VMD by listing the first words, and describing the general purpose for commands starting with those words.

The commands described in the following sections are listed by name, and followed by a list of the available arguments. If an argument is optional, it is enclosed in []s. If only one of a list of arguments is needed, the list is enclosed in <>s and the items are separated by |. Words in italics indicate a string or value to be specified by the user.

next up previous contents index
Next: animate Up: Tcl Text Interface Previous: Tcl/Tk   Contents   Index