On Mon, Aug 24, 2009 at 06:59:38PM +0100, Sam Mason wrote:
> > On Mon, Aug 24, 2009 at 11:14:19PM +1000, Paul Matthews wrote:
> > > if (x == 0.0)
> > > return 0.0;
> > > else {
> > > yx = y/x;
>
> is preventing a divide by zero on the line above. So it's not a
> performance hack, it's just allowing it to remain correct as a result of
> changing the maths around.
I've also just realized why it's safe to return zero here; "y" contains
the smaller number and so if "x" is zero, "y" must be zero as well.
-- Sam http://samason.me.uk/