gentype
smoothstep
(
| gentype edge0, |
gentype edge1, | |
gentype x) |
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.
The generic type name gentype is used to indicate that the function can take float, float2, float3, float4, float8, float16, double, double2, double3, double4, double8, or double16 as the type for the arguments.
The generic type name gentypef is used to indicate that the function can take float, float2, float3, float4, float8, or float16 as the type for the arguments.
The generic type name gentyped is used to indicate that the function can take double, double2, double3, double4, double8, or double16 as the type for the arguments.
The built-in common functions are implemented using the round to nearest even rounding mode.
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.