smoothstep()

A shader function that performs smooth Hermite interpolation between 0.0 and 1.0.

This function is equivalent to the GLSL built-in smoothstep(edge0, edge1, x) and is available inside p5.strands shader callbacks. It is commonly used to create soft transitions, smooth edges, fades, and anti-aliased effects.

Smoothstep is useful when a threshold or cutoff is needed, but with a gradual transition instead of a hard edge.

• Returns 0.0 when x is less than or equal to edge0
• Returns 1.0 when x is greater than or equal to edge1
• Smoothly interpolates between 0.0 and 1.0 when x is between them