Re: [ft-devel] Fast bisecting BBox_Cubic_Check

[Werner LEMBERG]

> The original motivation was to kill the last use of FT_SqrtFixed.

Ah, ok.

> Then I read old emails that made perplexing assertion that bisection
> is too slow to converge while never questioning iterations in the
> sqrt algorithm.  So I saw a challenge and produced a fast
> proof-of-concept code without sqrt.  It is a matter of improving
> accuracy now.  The old algorithm uses upscaling to achieve its
> precision and so can I.

Great!  It's always good to have a challenge :-)


    Werner