games/trek/visual.c

   1 /*      @(#)visual.c    8.1 (Berkeley) 5/31/93                          */
   2 /*      $NetBSD: visual.c,v 1.10 2009/08/12 08:54:54 dholland Exp $     */
   3
   4 /*
   5  * Copyright (c) 1980, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <stdio.h>
  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 static 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 /*ARGSUSED*/
  62 void
  63 visual(int z __unused)
  64 {
  65         int             ix, iy;
  66         int             co;
  67         struct xy       *v;
  68
  69         co = getintpar("direction");
  70         if (co < 0 || co > 360)
  71                 return;
  72         co = (co + 22) / 45;
  73         v = &Visdelta[co];
  74         ix = Ship.sectx + v->x;
  75         iy = Ship.secty + v->y;
  76         if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
  77                 co = '?';
  78         else
  79                 co = Sect[ix][iy];
  80         printf("%d,%d %c ", ix, iy, co);
  81         v++;
  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("%c ", 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 %d,%d\n", co, ix, iy);
  97         Move.time = 0.05;
  98         Move.free = 0;
  99 }