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