Path: utzoo!mnetor!uunet!husc6!think!ames!pasteur!ucbvax!UCSD.EDU!sd%chem
From: sd%chem@UCSD.EDU (Steve Dempsey)
Newsgroups: comp.sys.sgi
Subject: Z buffering on the 4D
Message-ID: <8803282324.AA24696@chem.chem.ucsd.edu>
Date: 28 Mar 88 23:24:27 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 8

I have just discovered that the "zclear()" function only affects the portion
of the z-buffer defined by the current viewport.  Thus it behaves analogously
to "clear()".  The manual entry is ambiguous on this point.  It states:

	zclear loads the z-buffer with the largest possible positive integer.

I originally made the assumption that zclear affected the entire z-buffer,
resulting in some entertaining, but frustrating images.