fwidth — return the sum of the absolute derivatives in x and y
genType fwidth(
genType p)
;
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))
.
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 |
---|---|---|---|---|---|---|---|---|---|---|
fwidth | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
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