games/robots/move_robs.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  * @(#)move_robs.c      8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/robots/move_robs.c,v 1.4 1999/11/30 03:49:19 billf Exp $
  35  * $DragonFly: src/games/robots/move_robs.c,v 1.4 2006/08/27 21:45:07 pavalos Exp $
  36  */
  37
  38 # include       "robots.h"
  39 # include       <signal.h>
  40
  41 static int      sign(int);
  42
  43 /*
  44  * move_robots:
  45  *      Move the robots around
  46  */
  47 void
  48 move_robots(bool was_sig)
  49 {
  50         COORD   *rp;
  51
  52         if (Real_time)
  53                 signal(SIGALRM, (sig_t)move_robots);
  54 # ifdef DEBUG
  55         move(Min.y, Min.x);
  56         addch(inch());
  57         move(Max.y, Max.x);
  58         addch(inch());
  59 # endif /* DEBUG */
  60         for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++) {
  61                 if (rp->y < 0)
  62                         continue;
  63                 mvaddch(rp->y, rp->x, ' ');
  64                 Field[rp->y][rp->x]--;
  65                 rp->y += sign(My_pos.y - rp->y);
  66                 rp->x += sign(My_pos.x - rp->x);
  67                 if (rp->y <= 0)
  68                         rp->y = 0;
  69                 else if (rp->y >= Y_FIELDSIZE)
  70                         rp->y = Y_FIELDSIZE - 1;
  71                 if (rp->x <= 0)
  72                         rp->x = 0;
  73                 else if (rp->x >= X_FIELDSIZE)
  74                         rp->x = X_FIELDSIZE - 1;
  75                 Field[rp->y][rp->x]++;
  76         }
  77
  78         Min.y = Y_FIELDSIZE;
  79         Min.x = X_FIELDSIZE;
  80         Max.y = 0;
  81         Max.x = 0;
  82         for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++)
  83                 if (rp->y < 0)
  84                         continue;
  85                 else if (rp->y == My_pos.y && rp->x == My_pos.x)
  86                         Dead = TRUE;
  87                 else if (Field[rp->y][rp->x] > 1) {
  88                         mvaddch(rp->y, rp->x, HEAP);
  89                         rp->y = -1;
  90                         Num_robots--;
  91                         if (Waiting)
  92                                 Wait_bonus++;
  93                         add_score(ROB_SCORE);
  94                 }
  95                 else {
  96                         mvaddch(rp->y, rp->x, ROBOT);
  97                         if (rp->y < Min.y)
  98                                 Min.y = rp->y;
  99                         if (rp->x < Min.x)
 100                                 Min.x = rp->x;
 101                         if (rp->y > Max.y)
 102                                 Max.y = rp->y;
 103                         if (rp->x > Max.x)
 104                                 Max.x = rp->x;
 105                 }
 106
 107         if (was_sig) {
 108                 refresh();
 109                 if (Dead || Num_robots <= 0)
 110                         longjmp(End_move, 0);
 111         }
 112
 113 # ifdef DEBUG
 114         standout();
 115         move(Min.y, Min.x);
 116         addch(inch());
 117         move(Max.y, Max.x);
 118         addch(inch());
 119         standend();
 120 # endif /* DEBUG */
 121         if (Real_time)
 122                 alarm(3);
 123 }
 124
 125 /*
 126  * add_score:
 127  *      Add a score to the overall point total
 128  */
 129 void
 130 add_score(int add)
 131 {
 132         Score += add;
 133         move(Y_SCORE, X_SCORE);
 134         printw("%d", Score);
 135 }
 136
 137 /*
 138  * sign:
 139  *      Return the sign of the number
 140  */
 141 static int
 142 sign(int n)
 143 {
 144         if (n < 0)
 145                 return -1;
 146         else if (n > 0)
 147                 return 1;
 148         else
 149                 return 0;
 150 }