OK. Thanks Bob, appreciate your explanations.
Frieda
On Aug 27, 2007, at 9:52 PM, Bob Hanson wrote:
draw $line1 translucent green
has to produce a point at the center of $line1, not just define it.
That's because providing an ID is always optional. So in this case,
where no object name is given, the most recently created or named
object
is assumed, and it is turned into a point at the center of $line1.
draw line1 translucent green
includes the ID, so it presumes the existance of line1 and then just
sets the already created line1 to translucent green, like the COLOR
command.
My point is simply that there actually is a use for both, at least in
the context of draw, and the set of object-creating commands (draw,
pmesh, isosurface) all use the same syntax, so even though it might
seem
reasonable to allow
isosurface $xxx ....
I'd prefer to keep all the commands the same, using the same logic
-- in
the command itself, as the very first parameter, added simply to
identify the object, use no $; elsewhere use $.
Bob
color atoms green
color $someObject yellow
center (atomno=3)
center $someDrawObject
draw line1 (atomno=3) (atomno=4)
draw line2 (atomno=5) (atomno=7)
draw line3 $line1 $line2
center $line3
isosurface mySurface select(model=1.2) molecular
color $mySurface blue
That sort of thing.
Bob
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Frieda Reichsman
Molecules in Motion
Interactive Molecular Structures
http://www.moleculesinmotion.com
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Robert M. Hanson
Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr
If nature does not answer first what we want,
it is better to take what answer we get.
-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
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Molecules in Motion
Interactive Molecular Structures
http://www.moleculesinmotion.com
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