Frieda Reichsman wrote:
> On Nov 20, 2008, at 9:27 AM, Robert Hanson wrote:
> 
>> I can see you are having great fun, Frieda,
> 
> Yes, I sure am! Hope to have something to show for it soon.
> 
> Meanwhile, I am trying to draw a cylinder with the following command:
> draw cylinder diameter 45.0 {atomno=3198 and (nitrogen or oxygen)}
> The result is a sphere. I realize I need to add a height parameter, of  
> some kind, to get a cylinder but I can't seem to figure out which  
> parameter it is in the documentation...
> 
I think it is similar as for a line. You will need 2 points that are the
center of the 2 circles that build the cylinder. It should be something
like:

draw cylinder diameter 45.0 {atomno=3198} {atomno=3199}

> Also, just curious, could I get the diameter to be in Angstroms  
> instead of pixels?

I think that the decimal value that you use is already in Angstrom
because it is scaled with zoom.

Regards,
Rolf

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