Molecule Tutorials - Herong's Tutorial Examples - v1.21, by Dr. Herong Yang
Difference of "move" and "translate" Commands
This section provides a quick introduction on the differences of 'turn' command and 'rotate' command in PyMol.
Both "move" and "translate" commands can be used to change the final visualization of the molecule structure. But they work differently:
"move" Command - Changes the camera location by move it along the x-axis, y-axis or z-axis in camera space. This command will change the origin of camera space and actually move the camera space.
Basically, the "move" command is not changing atom locations in the model space. It is only changing the camera location in different directions.
Examples of "move" commands:
# moving camera 5 units in the x-axis direction # the molecule structure image moved horizontally move x, 5 # move camera 5 units in the z-axis direction # the molecule structure image enlarged move z, 5
"translate" Command - Changes the molecule atom locations by move them in the direction and distance of the given vector in model space. This command will not change any viewing parameters.
Since atom locations are changes, the molecule structure is technically changed by the "translate" command.
Examples of "translate" commands:
# moving molecule atom locations 2 units in the x-axis direction. translate [2,0,0]
Conclusion: don't use "translate" command, if you don't want to modify the molecule object. Use "move" command only.
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