Message: 3
Date: Mon, 26 Sep 2005 18:53:36 -0700
From: TJ Frame <[EMAIL PROTECTED]>
Subject: Re: another yucky geometry question
To: How to use Revolution <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1
Thanks so much Jim, but alas, as this screenshot shows neither axis will
ever be parallel since this is a 2D perspectiev drawing utility. This second
image of the link is a screenshot shows a typical VP setup that might exist
and all the variations of ellipses that might result...
http://www.tjframe.com/EllipseExample.htm
But as I alluded to earlier, Perhaps this would be beyond the scope of
something I could implement. I know that 3D do ellipses every day, all day
long, so I had assumed it would be a straightfoward task. But I guess they
use matrix calculations to generate the points of the object rotated and
stuff. Perhaps I would need to have a 3D underpinning for the ellipse stuff
to work..
For now I'll put that feature on hold.
Thanks again guys,
- TJ
TJ,
Using the drawEllipse handler it is not hard to draw an ellipse of
any dimension, at any angle, at any location. It is fairly quick,
about 8 or 9 millisec. But, as I said, there would be a fair bit of
calculation required to GET the proper loc, dimensions, and angle.
You would need to expand on the calculation I used in the stack
"ellipseInAbox" to make the ellipse tangent to the radial lines. A
bit of work, but doable.
Jim
_______________________________________________
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
