smoothstep - Step and interpolate.

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       Returns 0.0 if x ≤ edge0 and 1.0 if x ≥ edge1 and performs smooth Hermite interpolation between 0 and 1
       when edge0 < x < edge1. This is useful in cases where you would want a threshold function with a smooth
       transition.

       This is equivalent to:

           gentype t;
           t = clamp((x - edge0) / (edge1 - edge0), 0, 1);
           return t * t * (3 - 2 * t);

       Results are undefined if edge0 ≥ edge1 or if x, edge0 or edge1 is a NaN.

       smoothstep - Step and interpolate.

       gentypesmoothstep(gentypeedge0,gentypeedge1,gentypex);gentypefsmoothstep(floatedge0,floatedge1,gentypefx);gentypedsmoothstep(doubleedge0,doubleedge1,gentypedx);gentypesmoothstep (halfedge0, halfedge1, gentypex)
       // if half extension enabled

        1. OpenCL Specification
           page 260, section 6.12.4 - Common Functions

The Khronos Group                                  11/18/2024                                   SMOOTHSTEP(3clc)

commonFunctions(3clc)

OpenCLSpecification[1]