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From: stripes@eng.umd.edu (Joshua Osborne)
Newsgroups: comp.windows.x
Subject: Re: Xtank
Message-ID: <1991Apr3.050858.28666@eng.umd.edu>
Date: 3 Apr 91 05:08:58 GMT
References: <1991Mar14.140911.16242@porthos.cc.bellcore.com> <40517@cup.portal.com>
Sender: news@eng.umd.edu (C-News)
Reply-To: stripes@eng.umd.edu (Joshua Osborne)
Distribution: usa
Organization: College of Engineering, Maryversity of Uniland, College Park
Lines: 26

In article <40517@cup.portal.com>, Sticks@cup.portal.com (Erich Belgarion Proudfit) writes:
> I have a version of Xtank from a Sun station.  I've re-compiled it on a Data 
> General DG/UX workstation.  It compiles correctly, but when I run the program
> and try and enter the game, I get 
> atan2: DOMAIN error
> Does anyone know how I can get this error fixed?

What version of xtank?

Try editing sysdep.h, and looking for lines like this

#if...
/* Avoid domain errors when both x and y are 0 */
#define ATAN2(Y,X) ((X)==0 && (Y)==0 ? 0.0 : atan2((double)Y, (double)X))
#else
#define ATAN2(Y,X) atan2((double)Y, (double)X)
#endif

And chage the #if... line to:
#if defined(sun) || defined(hpux) || defined(apollo) || defined(mips)
-- 
           stripes@eng.umd.edu          "Security for Unix is like
      Josh_Osborne@Real_World,The          Multitasking for MS-DOS"
      "The dyslexic porgramer"                  - Kevin Lockwood
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    - lbruck@eng.umd.edu (Lewis Bruck)