How can I get the relative position of a pixel in a fragment shader? I only know gl_FragCoord, but gl_FragCoord returns only the absolute coordinate.
Relative to what?
BTW, the answer is probably going to be “add another attribute”.
How can I get the relative position of a pixel in a fragment shader? I only know gl_FragCoord, but gl_FragCoord returns only the absolute coordinate.
Relative to what?
BTW, the answer is probably going to be “add another attribute”.