Message: 24
Date: Tue, 15 Dec 2009 22:21:47 -0800
From: Mark Swindell <mdswind...@cruzio.com>
Subject: Deriving an angle from three points
To: How to use Revolution <use-revolution@lists.runrev.com>
Message-ID: <b3725793-6274-4f53-91d2-3154d31f9...@cruzio.com>
Content-Type: text/plain; charset=us-ascii
40,116
98,186
132,118
How would one determine the angle created from three points, such as
those above?
Thanks,
Mark
Mark,
Or even easier. Set the Turtle at the apex and get the angle of the
other two points.
on mouseUp
startTurtle --Initiates the turtle graphics library
penup
setxy 98,186 --The vertex
put direction(40,116) into A
put direction(132,118) into B
put B-A into dA
put abs(dA) & cr & abs(180 - dA) into msg box
choose the browse tool
end mouseUP
(Assuming your middle point is the apex of the angle you want.)
To run this you will need the TG library. Run this in the msg box
go url "http://www.jamesphurley.com/jhurleyFolder/TurtleGraphics.rev";
Jim Hurley
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