smoothstep
smoothstep
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3
smoothstep Step and interpolate.

##

gentype `smoothstep` gentypeedge0 gentypeedge1 gentypex gentypef `smoothstep` float edge0 float edge1 gentypefx gentyped `smoothstep` double edge0 double edge1 gentypedx

##

gentype `smoothstep` (half `edge0`, half `edge1`, gentype `x`) // if half extension enabled

## Description

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.

## Notes

&commonFunctionsInc;

If extended with cl_khr_fp16, generic type name gentype may indicate half and half{2|3|4|8|16} as arguments and return values.

This function can be implemented using contractions such as mad or fma.

## Specification

OpenCL Specification

## Also see

Common Functions

##