Ken Perlin's smootherstep, like smoothstep but with zero slope and curvature at both edges. Same curve as fade, clamped outside the edges. Equal edges act as a step at edge0.
fade
edge0
https://en.wikipedia.org/wiki/Smoothstep#Variations
Ken Perlin's smootherstep, like smoothstep but with zero slope and curvature at both edges. Same curve as
fade, clamped outside the edges. Equal edges act as a step atedge0.https://en.wikipedia.org/wiki/Smoothstep#Variations