osx man page for glcleardepth

GLCLEARDEPTH(3G)														  GLCLEARDEPTH(3G)

NAME
       glClearDepth - specify the clear value for the depth buffer

C SPECIFICATION
       void glClearDepth( GLclampd depth )

PARAMETERS
       depth  Specifies the depth value used when the depth buffer is cleared. The initial value is 1.

DESCRIPTION
       glClearDepth  specifies	the  depth  value  used by glClear to clear the depth buffer.  Values specified by glClearDepth are clamped to the
       range [0, 1].

ERRORS
       GL_INVALID_OPERATION is generated if glClearDepth is executed between the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
       glGet with argument GL_DEPTH_CLEAR_VALUE

SEE ALSO
       glClear

																  GLCLEARDEPTH(3G)