bias
Ken Perlin's famous bias function (his version of the gamma correction function).
See bias_fast for a speedy alternative.
bias(b,t) Returns a value t shifted towards 0 or 1 by a certain degree b resulting in a power curve.
/*
** Usage:
** bias(b,t)
**
** Arguments:
** b bais, real
** t value, real
**
** Returns:
** If (t) varies over the [0,1] interval, then
** the result also varies over that interval.
** The zero and one endpoints of the interval
** are mapped onto themselves. Other values
** are shifted upward toward one if (b) is
** greater than one, and shifted downward
** toward zero if (b) is between zero and one.
**
** GMLscripts.com
*/
{
return power(argument1,ln(argument0)/ln(0.5));
}
** Usage:
** bias(b,t)
**
** Arguments:
** b bais, real
** t value, real
**
** Returns:
** If (t) varies over the [0,1] interval, then
** the result also varies over that interval.
** The zero and one endpoints of the interval
** are mapped onto themselves. Other values
** are shifted upward toward one if (b) is
** greater than one, and shifted downward
** toward zero if (b) is between zero and one.
**
** GMLscripts.com
*/
{
return power(argument1,ln(argument0)/ln(0.5));
}
[Please Login]
Projects: 2
Related: bias, bias_fast, boxstep, clamp, gain, gain_fast, gammacorrect, lerp, pulse, smoothstep, spline, spline4, step
Contributor: xot
comments powered by Disqus
