FlyerX <fly### [at] yahoocom> wrote:

> >
> http://mathworld.wolfram.com/Line-LineIntersection.html

That looks...complicated :-O

But seeing the diagram there gave me a thought: The problem looks like it might
be solvable by a strictly geometric method instead (triangles, angles, etc.)--
something that might be more conceptually easy to code into SDL.  I sat down
with pencil and paper and worked on it for awhile (resulting in lots of
crumpled-up paper!) But one particular method looks promising. If it pans out,
I'll post it.

I imagine the ancient Greeks might have given this problem a fair amount of
thought.

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