I'm yet to Blink, but thanks for the heads up ;)
Cheers, Diogo On Mon, Jun 16, 2014 at 6:37 PM, Mads Lund <[email protected]> wrote: > A little headsup for people doing blink-scripts. > The implementation of Acos in the Blink Script node have a bug, so if you > go below acos(-0.5) blink will return as drastically incorrect value. > I reported this bug a few weeks ago but have yet to receive a bug id. > > I the meantime i have found this algorithm that does a fairly good job for > my needs. > > float acosFast(float(x)) { > > float a=1.43+0.59*x ; > > a=(a+(2+2*x)/a)/2; > > float b=1.65-1.41*x ; > > b=(b+(2-2*x)/b)/2; > > float c=0.88-0.77*x ; > > c=(c+(2-a)/c)/2; > > return (8*(c+(2-a)/c)-(b+(2-2*x)/b))/6; > > } > > > > -Mads Hagbarth Lund > > TD, Postyr, Denmark. > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >
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