Name

fwidth — return the sum of the absolute derivatives in x and y

Declaration

genType fwidth(genType p);

Parameters

p

Specifies the expression of which to take the partial derivative.

Description

Available only in the fragment shader, fwidth returns the sum of the absolute derivatives in x and y using local differencing for the input argument p. It is equivalent to abs(dFdx(p)) + abs(dFdy(p)).

Version Support

FunctionVersion 1.10Version 1.20Version 1.30Version 1.40Version 1.50Version 3.30Version 4.00Version 4.10Version 4.20Version 4.30
fwidthYYYYYYYYYY

See Also

dFdx, dFdy

Copyright

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/.