I think by evenly spaced I mean equal arc lengths around the ellipse. Thanks for the idea.
Jason Merrill | E-Learning Solutions | icfconsulting.com >>-----Original Message----- >>From: [EMAIL PROTECTED] [mailto:flashcoders- >>[EMAIL PROTECTED] On Behalf Of Danny Kodicek >>Sent: Friday, March 17, 2006 4:01 AM >>To: Flashcoders mailing list >>Subject: Re: [Flashcoders] Position objects evenly around ellipse >> >>>Would anyone have a function, class, formula, idea whatever that would >>allow me to calculate X and Y values to place an "n" number of movie >>clips evenly spaced around an ellipse/oval shape? The number of clips >>can vary based on external data. The ellipse would also have to be >>calculated I suppose, but not actually drawn - the representation of it >>would be a separate graphic. >> >>'evenly spaced' is a slightly ambiguous phrase. It could either mean that >>they are spaced with even angles (meaning that physically the clips at the >>'pointy end' of the ellipse would be closer to each other) or that they are >>spaced with equal arc lengths, or various other metrics. >> >>I always find it easiest to think of an ellipse as a circle transformed by a >>stretch and rotate. So I'd do it something like this: >> >>for an ellipse with short radius (semiminor axis) a and long radius >>(semimajor axis) b, centred on c, pointed along the unit vector v: >>first place your clips evenly spaced around a unit circle: if there are N >>clips then place clip i at (sin(i*2*pi/N), cos(i*2*pi/N)) >>then stretch the positions: multiply the x-axis by a and y-axis by b: >>(a*sin(i*2*pi/N), b*cos(i*2*pi/N)) >>then rotate: move to i[2]*v+i[1]*normal(v) >>then translate: add c to each point. >> >>HTH >>Danny >> >>_______________________________________________ >>[email protected] >>To change your subscription options or search the archive: >>http://chattyfig.figleaf.com/mailman/listinfo/flashcoders >> >>Brought to you by Fig Leaf Software >>Premier Authorized Adobe Consulting and Training >>http://www.figleaf.com >>http://training.figleaf.com NOTICE: This message is for the designated recipient only and may contain privileged or confidential information. If you have received it in error, please notify the sender immediately and delete the original. Any other use of this e-mail by you is prohibited. _______________________________________________ [email protected] To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
