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Re: Re: Bug associated with Graphics3D???
Lou, I guess from your results below that a bug report to WRI is in order. Cheers .... Syd Incidentally your analysis reminds me of a design problem I had in 1966. The problem was to optimise the shape of the two surfaces of a high-gain cassegraine antenna given the radial characteristics of the microwave source located about where your point is. The antenna ended up on the UK AWAC aircraft of that era. I programmed in Algol in those days on an Elliott Automation 803. Boy how I would like to have had Mathematica and a Mac in 1966! Syd Geraghty B.Sc, M.Sc. sydgeraghty at mac.com Mathematica 22.214.171.124 for Mac OS X x86 (64 - bit) (12th September 2009) MacOS X V 10.6.1 Snow Leopard MacBook Pro 2.33 GHz Intel Core 2 Duo 2GB RAM On Nov 25, 2009, at 6:13 AM, Louis Talman wrote: > Well, sort of. Reversing the order of the Graphics3D objects > introduces something else I don't want, which is a box of varying > size. And if I transfer the PlotRange option to Pla[x] to control box > size, the 5.1 issue reappears! > > I forgot to mention a couple of things. The issue pertains only to > v7; the code works as it should in v6---at least on a PPC Mac. And > I've verified the problem in v7 on both a PPC Mac running OS X 10.5.8 > and on a Windoze box running Vista Home Premium. And tweaking > ViewPoint doesn't help. (Haven't tried a major change---but the > problem seems so sensitive to position that a little tweak in > ViewPoint should've done something if lighting angles are the issue.)