gl_FragCoord example

See the (WebGL) example, where I applied the suggestions to the the fragment shader of the questi...

By default, gl_FragCoord assumes a lower-left origin for window coordinates and assumes pixel cen...

Available only in the fragment language, gl_FragCoord is an input variable that contains the wind...

片段着色器的变量. 在片段着色器中也有一些有趣的变量。GLSL给我们提供了两个有意思的输入变量，它们是 gl_FragCoord ...