On Dec 4, 2008, at 7:23 PM, Martin Davis wrote:
It sounds like you want the relationship "intersects-and-not-
touches" - does that sound right?
Sounds right, given the way these functions appear to behave.
This relation has quite a complex expression in terms of the IM
pattern languge. It is:
[T********] or [*T*******] or [***T*****] or [****T****]
and not ( [FT*******] or [F**T*****] or [F***T****] )
This is equivalent to:
not ([FF*FF****] or [FT*******] or [F**T*****] or [F***T****] )
Ack! Pretty complex for what should be a simple, and basic, operation.
Maybe I'm trying to make it too complex? Is there a simple way to
select all features within a rectangle? There should be, it's a
common thing to do.
-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/
"We are at war with them. Neither in hatred nor revenge and with no
particular pleasure I shall kill every ___ I can until the war is
over. That is my duty."
"Don't you even hate 'em?"
"What good would it do if I did? If all the many millions of people of
the allied nations devoted an entire year exclusively to hating the
____ it wouldn't kill one ___ nor shorten the war one day."
<Ha, ha> "And it might give 'em all stomach ulcers."
- Tarzan, on war
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