That's what I'm doing now. See the second code block in the OP.

My question is: Given two (or more) overlapping ellipses, can I combine their formulae mathematically somehow so as to reduce the cost of testing for inclusion/exclusion?

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
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In reply to Re^2: Graphics math. by BrowserUk
in thread Graphics math. by BrowserUk

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