trek/visual.c

   1 /*      $NetBSD: visual.c,v 1.3 1995/04/22 10:59:39 cgd Exp $   */
   2
   3 /*
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)visual.c    8.1 (Berkeley) 5/31/93";
  39 #else
  40 static char rcsid[] = "$NetBSD: visual.c,v 1.3 1995/04/22 10:59:39 cgd Exp $";
  41 #endif
  42 #endif /* not lint */
  43
  44 # include       "trek.h"
  45
  46 /*
  47 **  VISUAL SCAN
  48 **
  49 **      A visual scan is made in a particular direction of three sectors
  50 **      in the general direction specified.  This takes time, and
  51 **      Klingons can attack you, so it should be done only when sensors
  52 **      are out.
  53 */
  54
  55 /* This struct[] has the delta x, delta y for particular directions */
  56 struct xy       Visdelta[11] =
  57 {
  58         -1,     -1,
  59         -1,      0,
  60         -1,      1,
  61          0,      1,
  62          1,      1,
  63          1,      0,
  64          1,     -1,
  65          0,     -1,
  66         -1,     -1,
  67         -1,      0,
  68         -1,      1
  69 };
  70
  71 visual()
  72 {
  73         register int            ix, iy;
  74         int                     co;
  75         register struct xy      *v;
  76
  77         co = getintpar("direction");
  78         if (co < 0 || co > 360)
  79                 return;
  80         co = (co + 22) / 45;
  81         v = &Visdelta[co];
  82         ix = Ship.sectx + v->x;
  83         iy = Ship.secty + v->y;
  84         if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
  85                 co = '?';
  86         else
  87                 co = Sect[ix][iy];
  88         printf("%d,%d %c ", ix, iy, co);
  89         v++;
  90         ix = Ship.sectx + v->x;
  91         iy = Ship.secty + v->y;
  92         if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
  93                 co = '?';
  94         else
  95                 co = Sect[ix][iy];
  96         printf("%c ", co);
  97         v++;
  98         ix = Ship.sectx + v->x;
  99         iy = Ship.secty + v->y;
 100         if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
 101                 co = '?';
 102         else
 103                 co = Sect[ix][iy];
 104         printf("%c %d,%d\n", co, ix, iy);
 105         Move.time = 0.05;
 106         Move.free = 0;
 107 }