James, Thanks for this, but starting the Turtle stack did not allow me to calculate the angle. I got an error each time at "Start Turtle." Is there a trick to making the library accessible to other stacks?
Mark On Dec 16, 2009, at 8:08 AM, James Hurley wrote: >> >> Message: 24 >> Date: Tue, 15 Dec 2009 22:21:47 -0800 >> From: Mark Swindell <[email protected]> >> Subject: Deriving an angle from three points >> To: How to use Revolution <[email protected]> >> Message-ID: <[email protected]> >> 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 > _______________________________________________ > use-revolution mailing list > [email protected] > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-revolution _______________________________________________ use-revolution mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
