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Hello Gary,
I agree that trigonometry is a lot more fun. ;-)
Just now seeing Bob's post regarding log scales. Shall we take the bait? Not
today, anyway, as far as I'm concerned. It's nearly 10pm here.
Best regards,
Michael Suesserott
-----Ursprungliche Nachricht-----
Von: Gary Fritz [mailto:fritz@xxxxxxxx]
Gesendet: Thursday, January 04, 2001 20:31
An: omega-list@xxxxxxxxxx
Betreff: Re: AW: back to the well again... parallel trend lines
> Solution: P4 = (x3+x2-x1, y3+y2-y1)
Awww, that's too EASY... :-)
Good point, Michael. I got so caught up in trigonometry that I
didn't think of the obvious approach.
That will produce a line from P3 to P4 at the same angle as the
original P1-P2 line. P3 will be one endpoint. If you wanted the
parallel line centered around P3, you could just add/subtract 1/2 the
x2-x1 and y2-y1 values to the P3 location.
Gary
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