GL_GEQUAL
Passes if the incoming depth value is greater than or equal to the stored depth value.
GL_ALWAYS
Always passes.
The initial value of func is GL_LESS. Initially, depth testing is disabled.
Notes
Even if the depth buffer exists and the depth mask is nonzero, the depth buffer is not updated if the depth test is disabled.
Errors
GL_INVALID_ENUM is generated if func is not an accepted value.
GL_INVALID_OPERATION is generated if glDepthFunc is executed between the execution of glBegin and the corresponding execution of glEnd.
Associated Gets
glGet with argument GL_DEPTH_FUNC
glIsEnabled with argument GL_DEPTH_TEST
See Also
glDepthRange, glEnable, glPolygonOffset
glDepthMask
Enable or disable writing into the depth buffer
C Specification ...
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