On Apr 10, 2006, at 11:38 AM, Bob Hanson wrote:

Ah, yes. The "center atomno=1" undoes "translate x 50" but does not undo "zoom 500". The scaling I'm referring to is independent of the zoom. Thus,

load 1l38.pdb
zoom 500

is a different scale from

load 1l38.pdb
center atomno=1
zoom 500

I think you will see that if you then "zoom 100" after your commands, the model has been scaled down by about a factor of two to fit the screen. This occurred in response to the "center atomno=1" command. If you had instead "set picking center" and then clicked on atom 1, then there would be no scaling change.

I should have said "scaled to fit the screen at a zoom of 100."

OK, I see this. 

So - to eliminate automatic jumping around stimulated by centering, one has to turn OFF both windowCentered and perpectiveDepth. OK.

BTW, there is a jump when you issue
reset
center all

why does "center all" differ from the centering in "reset"?

Frieda



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Frieda Reichsman, PhD

Molecules in Motion

Interactive Molecular Structures

http://www.moleculesinmotion.com


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