SMOOTHSTEP(3G)                  [FIXME: manual]                 SMOOTHSTEP(3G)

NAME
       smoothstep - perform Hermite interpolation between two values

DECLARATION
       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);

PARAMETERS
       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.

DESCRIPTION
       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.

VERSION SUPPORT

       +-----------+-----------------------------------------------------------------------------------+
       |           |                          OpenGL Shading Language Version                          |
       +-----------+------+------+------+------+------+------+------+------+------+------+------+------+
       |Function   | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50 |
       |Name       |      |      |      |      |      |      |      |      |      |      |      |      |
       +-----------+------+------+------+------+------+------+------+------+------+------+------+------+
       |smoothstep |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       |(genType)  |      |      |      |      |      |      |      |      |      |      |      |      |
       +-----------+------+------+------+------+------+------+------+------+------+------+------+------+
       |smoothstep |  -   |  -   |  -   |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       |(genDType) |      |      |      |      |      |      |      |      |      |      |      |      |
       +-----------+------+------+------+------+------+------+------+------+------+------+------+------+

SEE ALSO
       mix(), step()

COPYRIGHT
       Copyright (C) 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/.

COPYRIGHT
       Copyright (C) 2011-2014 Khronos Group

[FIXME: source]                   05/21/2022                    SMOOTHSTEP(3G)