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From: aki@speech1.cs.cmu.edu (Yoshiaki Ohshima)
Newsgroups: comp.lang.c,comp.unix.questions
Subject: fast arc tangent routine available?
Keywords: math library, atan(), atan2(), arc tangent, table lookup
Message-ID: <6002@pt.cs.cmu.edu>
Date: 29 Aug 89 20:24:40 GMT
Distribution: na
Organization: Carnegie-Mellon University, CS/RI
Lines: 8

Hello, does anyone know if there are any 'arc tangent' routines, which run
faster than atan() and atan2() of the standard C math library?

I am now using Micro-Vax-II and (occasionally) PMAX, and have an impression
that my simple-minded table lookup using bisection search doesn't seem to
work well. Has anyone ever worked on this?

						--aki