On Tue, Feb 28, 2012 at 8:07 AM, Tab Atkins Jr. <jackalmage@gmail.com> wrote: > On Tue, Feb 28, 2012 at 5:12 AM, Boris Zbarsky <bzbarsky@mit.edu> wrote: >> On 2/28/12 3:01 AM, Kang-Hao (Kenny) Lu wrote: >>> >>> I am not sure this is well-defined as I don't know if concentric >>> ellipses are by definition necessarily having the same eccentricity. >> >> They're not. >> >> >>> I don't mean to use www-style as a Math forum but oddly enough I >>> couldn't find the definition of "concentric ellipses" on Google. >> >> When people say "concentric ellipses" they seem to mean non-intersecting >> ellipses with shared center and major axes pointing in the same direction. >> Or something. There is no commonly accepted definition I know of, other >> than "I know it when I see it". > > Huh. I thought there was a simple definition (linearly scale both > axises). I'll do some quick testing to see what impls do and ensure > it matches what I assume, then specify that more clearly. Yup, everyone does the obvious thing. I've added the word "proportional" in front of "concentric ellipses". That sound good? ~TJReceived on Tuesday, 28 February 2012 16:17:18 UTC
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