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. 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  * @(#)move_robs.c      8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/robots/move_robs.c,v 1.4 1999/11/30 03:49:19 billf Exp $
  31  * $DragonFly: src/games/robots/move_robs.c,v 1.4 2006/08/27 21:45:07 pavalos Exp $
  32  */
  33
  34 #include "robots.h"
  35 #include <signal.h>
  36
  37 static int sign(int);
  38
  39 /*
  40  * move_robots:
  41  *      Move the robots around
  42  */
  43 void
  44 move_robots(bool was_sig)
  45 {
  46         COORD *rp;
  47
  48         if (Real_time)
  49                 signal(SIGALRM, (sig_t)move_robots);
  50 #ifdef DEBUG
  51         move(Min.y, Min.x);
  52         addch(inch());
  53         move(Max.y, Max.x);
  54         addch(inch());
  55 #endif /* DEBUG */
  56         for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++) {
  57                 if (rp->y < 0)
  58                         continue;
  59                 mvaddch(rp->y, rp->x, ' ');
  60                 Field[rp->y][rp->x]--;
  61                 rp->y += sign(My_pos.y - rp->y);
  62                 rp->x += sign(My_pos.x - rp->x);
  63                 if (rp->y <= 0)
  64                         rp->y = 0;
  65                 else if (rp->y >= Y_FIELDSIZE)
  66                         rp->y = Y_FIELDSIZE - 1;
  67                 if (rp->x <= 0)
  68                         rp->x = 0;
  69                 else if (rp->x >= X_FIELDSIZE)
  70                         rp->x = X_FIELDSIZE - 1;
  71                 Field[rp->y][rp->x]++;
  72         }
  73
  74         Min.y = Y_FIELDSIZE;
  75         Min.x = X_FIELDSIZE;
  76         Max.y = 0;
  77         Max.x = 0;
  78         for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++)
  79                 if (rp->y < 0)
  80                         continue;
  81                 else if (rp->y == My_pos.y && rp->x == My_pos.x)
  82                         Dead = true;
  83                 else if (Field[rp->y][rp->x] > 1) {
  84                         mvaddch(rp->y, rp->x, HEAP);
  85                         rp->y = -1;
  86                         Num_robots--;
  87                         if (Waiting)
  88                                 Wait_bonus++;
  89                         add_score(ROB_SCORE);
  90                 }
  91                 else {
  92                         mvaddch(rp->y, rp->x, ROBOT);
  93                         if (rp->y < Min.y)
  94                                 Min.y = rp->y;
  95                         if (rp->x < Min.x)
  96                                 Min.x = rp->x;
  97                         if (rp->y > Max.y)
  98                                 Max.y = rp->y;
  99                         if (rp->x > Max.x)
 100                                 Max.x = rp->x;
 101                 }
 102
 103         if (was_sig) {
 104                 refresh();
 105                 if (Dead || Num_robots <= 0)
 106                         longjmp(End_move, 0);
 107         }
 108
 109 #ifdef DEBUG
 110         standout();
 111         move(Min.y, Min.x);
 112         addch(inch());
 113         move(Max.y, Max.x);
 114         addch(inch());
 115         standend();
 116 #endif /* DEBUG */
 117         if (Real_time)
 118                 alarm(3);
 119 }
 120
 121 /*
 122  * add_score:
 123  *      Add a score to the overall point total
 124  */
 125 void
 126 add_score(int add)
 127 {
 128         Score += add;
 129         move(Y_SCORE, X_SCORE);
 130         printw("%d", Score);
 131 }
 132
 133 /*
 134  * sign:
 135  *      Return the sign of the number
 136  */
 137 static int
 138 sign(int n)
 139 {
 140         if (n < 0)
 141                 return -1;
 142         else if (n > 0)
 143                 return 1;
 144         else
 145                 return 0;
 146 }