games/trek/visual.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)visual.c 8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/trek/visual.c,v 1.4 1999/11/30 03:49:56 billf Exp $
  35  * $DragonFly: src/games/trek/visual.c,v 1.3 2006/09/07 21:19:45 pavalos Exp $
  36  */
  37
  38 # include       "getpar.h"
  39 # include       "trek.h"
  40
  41 /*
  42 **  VISUAL SCAN
  43 **
  44 **      A visual scan is made in a particular direction of three sectors
  45 **      in the general direction specified.  This takes time, and
  46 **      Klingons can attack you, so it should be done only when sensors
  47 **      are out.
  48 */
  49
  50 /* This struct[] has the delta x, delta y for particular directions */
  51 struct xy       Visdelta[11] =
  52 {
  53         { -1,   -1 },
  54         { -1,    0 },
  55         { -1,    1 },
  56         {  0,    1 },
  57         {  1,    1 },
  58         {  1,    0 },
  59         {  1,   -1 },
  60         {  0,   -1 },
  61         { -1,   -1 },
  62         { -1,    0 },
  63         { -1,    1 }
  64 };
  65
  66 void
  67 visual(__unused int unused)
  68 {
  69         int             ix, iy;
  70         int                     co;
  71         struct xy       *v;
  72
  73         co = getintpar("direction");
  74         if (co < 0 || co > 360)
  75                 return;
  76         co = (co + 22) / 45;
  77         v = &Visdelta[co];
  78         ix = Ship.sectx + v->x;
  79         iy = Ship.secty + v->y;
  80         if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
  81                 co = '?';
  82         else
  83                 co = Sect[ix][iy];
  84         printf("%d,%d %c ", ix, iy, co);
  85         v++;
  86         ix = Ship.sectx + v->x;
  87         iy = Ship.secty + v->y;
  88         if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
  89                 co = '?';
  90         else
  91                 co = Sect[ix][iy];
  92         printf("%c ", co);
  93         v++;
  94         ix = Ship.sectx + v->x;
  95         iy = Ship.secty + v->y;
  96         if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
  97                 co = '?';
  98         else
  99                 co = Sect[ix][iy];
 100         printf("%c %d,%d\n", co, ix, iy);
 101         Move.time = 0.05;
 102         Move.free = 0;
 103 }