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