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

NAME

atan - return the arc-tangent of the parameters

DECLARATION

genType atan(genType y, genType x);

genType atan(genType y_over_x);

PARAMETERS

y

Specify the numerator of the fraction whose arctangent to return.

x

Specify the denominator of the fraction whose arctangent to return.

y_over_x

Specify the fraction whose arctangent to return.

DESCRIPTION

atan returns the angle whose trigonometric arctangent is y x or y_over_x, depending on which overload is invoked. In the first overload, the signs of y and x are used to determine the quadrant that the angle lies in. The values returned by atan in this case are in the range −. Results are undefined if x is zero.

For the second overload, atan returns the angle whose tangent is y_over_x. Values returned in this case are in the range − 2 2.

VERSION SUPPORT

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
atan ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔

SEE ALSO

sin(), cos(), tan()

COPYRIGHT

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/.

COPYRIGHT

Copyright © 2011-2014 Khronos Group

05/21/2015 [FIXME: source]