fwidth — return the sum of the absolute derivatives in x and y
genType fwidth( | genType p); |
p Specifies the expression of which to take the partial derivative.
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)).
| OpenGL ES Shading Language Version | |||
|---|---|---|---|
| Function Name | 1.00 | 3.00 | 3.10 |
| fwidth | - | ✔ | ✔ |
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