glsl内置变量

glsl内置变量

gl_Position

contains the position of the current vertex

gl_PointSize

contains size of rasterized points, in pixels

gl_PointCoord

contains the coordinate of a fragment within a point

gl_FrontFacing

indicates whether a primitive is front or back facing

gl_FragCoord

contains the window-relative coordinates of the current fragment

gl_FragColor

gl_FragColor is deprecated. You should use the following syntax:

layout(location = 0) out vec4 diffuseColor;