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

OpenGL ES Shading Language Version
Function Name 1.00 3.00
fwidth-✔

See Also

abs, dFdx, dFdy

Copyright

Copyright © 2011-2013 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.