Filter Forge - Bias Curve Formula?

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fisholith Posts: 24 Filters: 2	Does anyone know off hand what the bias formula is? I was building a curve script that handles a combination of curves I use pretty often, but I need to be able to build in a bias curve, and it occurs to me that I'm not sure what the function for it is. I know that the gain formula is a pair of bias curves, and I'll need to build a gain eventually too, but that obviously doesn't help in the short term.
	Posted: June 25, 2010 9:43 pm	Details E-Mail
GMM Moderator Filter Forge, Inc Posts: 3491	The formulas were borrowed from Christophe Schlick's "Fast alternative to Perlin's bias and gain functions", Graphics Gems IV, ed. Paul Heckbert, Academic Press, 1994.
	Posted: June 26, 2010 5:00 am	Details E-Mail
Vladimir Golovin Administrator Posts: 3446 Filters: 55	Hint, hint: the above reply is a quote from Filter Forge help file
	Posted: June 27, 2010 10:10 am	Details E-Mail
David Roberson Artist Posts: 404 Filters: 36	I tracked down bias and gain functions based on that publication, though they're in javascript. I don't think they'll be a problem to convert to lua, though. I feel like I've done this before for a map script, but I'm trying it out with curve scripts this time. I wish there were more curve scripts featuring common and custom curve profiles.
	Posted: July 22, 2022 8:26 am	Details E-Mail

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