On Dec 10, 2007 8:51 AM, Michael Droettboom <[EMAIL PROTECTED]> wrote:
> I have 8-spline approximation working on the trunk and on the transforms > branch. (r4679) Thanks Michael, I was working on this myself but it is hard for me to keep up with you :-) In reading the paper Charlie sent and links therein (http://www.tinaja.com/glib/ellipse4.pdf and http://itc.ktu.lt/itc354/Riskus354.pdf), one comment was that the usual magic number offset = 4.0 * (npy.sqrt(2) - 1) / 3.0 is not ideal. When I tested the JPLs test script with one of the suggested magic numbers which minimize the SS errors with 4 points on the ellipse, the error was smaller than what we were getting with the one above (I used k=0.55191496 from the Rivus paper). I see you are using a different formula for the magic number in the trunk. Do you think we could see additional accuracy with a different magic number as discussed in these papers? JDH ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
