50g

I am a construction carpenter and I am trying to use the 50g to facillicte me on the job. My pet project at this time is reconstructing an ellipse. In particular a cyclinder that intersets a plane at a compound angle. the radius is typically at 9in. the cylinder 45 deg from horizontal and aprox. 45deg vertically. The information I am able to obtian is the vertical and Horizontal envelope. I know the radius. so putting in a value for Hoxisonatl max, Horizontal min, Vertical left, Vertical right , and radius. how could i make a progam that will give me the center, major axis points, minor axis points. once i have the coordinates of those I can plot it out. thanks.

----- Original Message -----

From: bigraycar53

To: 50g@yahoogroups.com

Sent: Tuesday, March 10, 2009 5:58 PM

Subject: [50g] ellipse

I am a construction carpenter and I am trying to use the 50g to facillicte me on the job. My pet project at this time is reconstructing an ellipse. In particular a cyclinder that intersets a plane at a compound angle. the radius is typically at 9in. the cylinder 45 deg from horizontal and aprox. 45deg vertically. The information I am able to obtian is the vertical and Horizontal envelope. I know the radius. so putting in a value for Hoxisonatl max, Horizontal min, Vertical left, Vertical right , and radius. how could i make a progam that will give me the center, major axis points, minor axis points. once i have the coordinates of those I can plot it out. thanks.

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On Tue, 2009-03-10 at 19:29 -0400, Fred Hoeldtke wrote:

> ellipse

google is your friend; http://en.wikipedia.org/wiki/Ellipse

Cheers Mick

You can do ellipses using parametric plotter.... with this equation
 
a*cos(X)+b*sin(X)*i
or
(a*cos(X),b*sin(X))

where 2*a is the greater axis and 2*b is minor axis, for a 0 (zero) inclination angle....




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