I don't know any "standard", but I guess at minimum you would need a center point, a second point that defines a perpendicular axis, and two axis lengths (major and minor axes). I don't know that we need another way to define a plane, but the same info could be used for both planes and ellipses.
I think you could eliminate one of the axes lengths by giving an eccentricity similar to the ellipsoid. The scale of the ellipse would then be proportional to the length of the perpendicular vector. Dean On 3/7/07 9:37 AM, "Bob Hanson" <[EMAIL PROTECTED]> wrote: > Hmm, maybe I am getting Jmol-users messages again. Though I didn't get > the original of this. > > The problem with flat ellipsoids -- that is (I think), ellipsoids that > have three different perpendicular > axes lengths -- is in defining the orientation of the second two axes. > What is the reference point? > I couldn't figure out how to do that, or what was a "standard" way of > doing it, so I left that out. > > As soon as someone tells me how to do it, I will do it. > > Bob > > > Angel Herraez wrote: > >> A flat ellipsoid? >> I wouldn't call that easy, but... >> >> You can also create a polygon with as many vertices as you are >> willing to calculate. >> >> >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to share your >> opinions on IT & business topics through brief surveys-and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> Jmol-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/jmol-users >> >> > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Jmol-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/jmol-users ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Jmol-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jmol-users
