gl_FragCoord z

The x and y components of gl_FragCoord represent the fragment's screen-space coordinates (with (0...

gl_FragCoord和gl_FragDepth分别是片元着色器的输入和输出变量。 gl_FragCoord是个vec4，四个分量分别对应x, y, z和1/w。其中，x和y是当前片元的窗口 ...

z / gl_FragCoord.w is not the camera-space (or world-space) distance to the camera. Nor is it the...

gl_FragCoord.z is generated by the following process, assuming the usual transforms: Camera-space...

gl_FragCoord is window-relative (screen) coordinates. .xy is pixel units of the center of the fra...