home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
FishMarket 1.0
/
FishMarket v1.0.iso
/
fishies
/
526-550
/
disk_529
/
townmaze
/
src.lzh
/
nhbrexists.c
< prev
next >
Wrap
C/C++ Source or Header
|
1991-08-04
|
1KB
|
51 lines
/*
** nhbrexists.c Copyright 1991 Kent Paul Dolan,
** Mountain View, CA, USA 94039-0755
**
** Written to satisfy an inquiry on USENet's rec.games.programmer newsgroup.
** May be freely used or modified in any non-commercial work. Copyrighted
** only to prevent patenting by someone else.
*/
#include <stdio.h>
#include "townmaze.h"
#include "townproto.h"
#ifdef __STDC__
int nhbrexists(int cellid,int nhbrid)
#else
int nhbrexists(cellid,nhbrid)
int cellid, nhbrid;
#endif
{
int celli, cellj;
celli = cellid / (mazewidth/2);
cellj = cellid % (mazewidth/2);
switch (nhbrid)
{
case 0: /* too far north? */
return (((celli - 1) < 0) ? (1==0) : (1==1));
break;
case 1: /* too far east? */
return (((cellj + 1) >= (mazewidth/2)) ? (1==0) : (1==1));
break;
case 2: /* too far south? */
return (((celli + 1) >= (mazeheight/2)) ? (1==0) : (1==1));
break;
case 3:/* too far west? */
return (((cellj - 1) < 0) ? (1==0) : (1==1));
break;
default:
fprintf(stderr,"bad neighbor id value to nhbrexists %d\n",nhbrid);
showdebugmaze();
freespace();
exit(1);
}
}