[Fwd: [Jmol-developers] spin/rotate consolidation -- request for comments]

[Bob H. <ha...@st...>]

This is revised slightly just in the way draw objects and coordinates 
are referenced..
Also, "perpendicular" and "plane" added to draw. See that prototype page.

draw PERP $triangle1
#draws a line that is through the geometric center of $triangle 1 and 
perpendicular to it.

draw PLANE (atomno=1) (atomno=2) (atomno=3)

draws a rectangle with one side from atom 1 to atom 2 and the opposite 
side through atom 3.

more to come. Enough for now!

The old "spin x, spin y, spin z, spin on/off" is still there, but
I consider it deprecated. FAR better is a full complement of
INTERNAL and FIXED frame rotations and spinning involving
x, y, z, -x, -y, -z, arbitrary axisangle {x y z}, designation
of (atom sets) {x y z} coordinates, and $line1 draw objects
for both fixed and internal spinning and rotating, and designation
of two coordinates or two atom sets or an atom set and a coordinate
for internal coordinate spinning. Test page will be at
http://www.stolaf.edu/people/hansonr/jmol/test/json/spin.htm
momentarily.

    *
    * spin and rotate are now consolidated here.
    * The old "spin x, spin y, spin z" is still there, but
    * pretty much deprecated because it is not that useful.
    * spin on and spin off still work as well -- and are important
    *
    * far simpler is
    *
    *  spin x 10
    *  spin y 10
    *  
    *  these are pure x or y spins or
    *  
    *  spin axisangle {1 1 0} 10
    *  
    *  this is the same as the old "spin x 10; spin y 10" -- or is it?
    *  anyway, it's better!
    *  
    *  note that there are many defaults
    *  
    *  spin
    *  spin 10
    *  spin x
    *  
    *  and several new options
    *  
    *  spin -x
    *  spin axisangle {1 1 0} 10
    *  spin 10 (atomno=1)(atomno=2)
    *  spin 20 {0 0 0} {1 1 1}
    *  
    *  The INTERNAL keyword indicates that spins or rotations are to be
    *  carried out in the internal molecular coordinate frame, not the
    *  fixed room frame.
    *  
    *  
    *  Bob Hanson
    *
    *