Re: 2d circular union nav-mesh

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Hi Sam,

Yeah, i'm familar with the minkowski difference :) I was hoping for a 
simple solution where i didn't have to construct it as its quite complex 
for the interior of the union of circles.

> Now, I haven’t thought this through, but... if you converted your 
> union’d circles into a set of boundary curves (e.g. say, circles 
> each with a set of valid angle regions) and had a function that 
> allowed you to project your circles centre point to the closest 
> location on the boundary curves (say, search overlapping circles for
> nearest points in viable regions and then pick closest), you would 
> be able to do a straight forward circle-point check with that point 
> pair to get the right answer. It is doable, but not exactly trivial. 

Thanks, i'll give that some thought :)

Cheers, Paul.
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