smoothstep — perform Hermite interpolation between two values
genType smoothstep(
|
genType edge0, |
| genType edge1, | |
genType x); |
genType smoothstep(
|
float edge0, |
| float edge1, | |
genType x); |
genDType smoothstep(
|
genDType edge0, |
| genDType edge1, | |
genDType x); |
genDType smoothstep(
|
double edge0, |
| double edge1, | |
genDType 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);
Results are undefined if edge0 ≥ edge1.
| OpenGL Shading Language Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Function Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50 |
| smoothstep (genType) | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| smoothstep (genDType) | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.