Perspective projection matrix

gl_FragCoord.w 是裁剪空间clip.w 的倒数即1/clip.w , 由上面的透视投影矩阵的推导过程可以看出，为了凑透视除法， clip.w 值就是眼坐标系z 值的负数，也 ...

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

gl_FragCoord.z is the window-space depth value of the current fragment. It has nothing to do with...

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

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