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
.
Function | Version 1.10 | Version 1.20 | Version 1.30 | Version 1.40 | Version 1.50 | Version 3.30 | Version 4.00 | Version 4.10 | Version 4.20 | Version 4.30 |
---|---|---|---|---|---|---|---|---|---|---|
smoothstep (genType) | - | - | Y | Y | Y | Y | Y | Y | Y | Y |
smoothstep (genDType) | - | - | - | - | - | - | Y | Y | Y | Y |
Copyright © 2011 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/.