On 03/26/2010 06:30 AM, Otis Rothenberger wrote:
> Bob,
>
> I'm making some progress on your suggestion to check and branch during the
> addition of atoms (below). One problem that I'm having is comparing points,
> so I thought that better check with you. If I have two points defined, a and
> b, shouldn't the following syntax produce a true or false based on xyz
> identity of the points?
>
> If ({a} == {b}){do stuff;};continue on to other stuff;
>
> I can send you the specific code, but I thought I'd ask about my basic
> understanding of point math and logic first. My problem is that the above
> seems to be true for points that are not the same.
>
The scripting documentation on Jmol math says:
point == point
true if the distance between the points is less than 1E-6.
So the coordinates must not be identical.
Maybe it helps if you compare the individual xyz values instead:
if ({a}.x == {b}.x AND {a}.y == {b}.y AND {a}.z == {b}.z)
Regards,
Rolf
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