osx man page for glclearcolor

GLCLEARCOLOR(3G)														  GLCLEARCOLOR(3G)

NAME
       glClearColor - specify clear values for the color buffers

C SPECIFICATION
       void glClearColor( GLclampf red,
			  GLclampf green,
			  GLclampf blue,
			  GLclampf alpha )

PARAMETERS
       red, green, blue, alpha
			     Specify  the  red, green, blue, and alpha values used when the color buffers are cleared.	The initial values are all
			     0.

DESCRIPTION
       glClearColor specifies the red, green, blue, and alpha values used by glClear to clear the color buffers.  Values specified by glClearColor
       are clamped to the range [0, 1].

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

ASSOCIATED GETS
       glGet with argument GL_COLOR_CLEAR_VALUE

SEE ALSO
       glClear

																  GLCLEARCOLOR(3G)