smoothstep — perform Hermite interpolation between two values
genType smoothstep(
|
genType edge0, |
| genType edge1, | |
genType x); |
genType smoothstep(
|
float edge0, |
| float edge1, | |
genType x); |
edge0
Specifies the value of the lower edge of the Hermite function.
edge1
Specifies the value of the upper edge of the Hermite function.
x
Specifies the source value for interpolation.
smoothstep performs smooth Hermite interpolation between 0 and
1 when edge0 < x < edge1.
This is useful in cases where a threshold function with a smooth transition is desired.
smoothstep is equivalent to:
genType t; /* Or genDType t; */
t = clamp((x - edge0) / (edge1 - edge0), 0.0, 1.0);
return t * t * (3.0 - 2.0 * t);
smoothstep returns 0.0 if x ≤ edge0 and
1.0 if x ≥ edge1.
Results are undefined if edge0 ≥ edge1.
| OpenGL ES Shading Language Version | ||||
|---|---|---|---|---|
| Function Name | 1.00 | 3.00 | 3.10 | 3.20 |
| smoothstep (genType) | ✔ | ✔ | ✔ | ✔ |
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