BSD 4_3 release

[unix-history] / usr / src / games / robots / move_robs.c

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

#ifndef lint
static char sccsid[] = "@(#)move_robs.c 5.1 (Berkeley) 5/30/85";
#endif not lint

# include       "robots.h"
# include       <signal.h>

/*
* move_robots:
*      Move the robots around
*/
move_robots(was_sig)
bool    was_sig;
{
       register COORD  *rp;
       register int    y, x;
       register int    mindist, d;
       static COORD    newpos;

       if (Real_time)
               signal(SIGALRM, move_robots);
# ifdef DEBUG
       move(Min.y, Min.x);
       addch(inch());
       move(Max.y, Max.x);
       addch(inch());
# endif DEBUG
       for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++) {
               if (rp->y < 0)
                       continue;
               mvaddch(rp->y, rp->x, ' ');
               Field[rp->y][rp->x]--;
               rp->y += sign(My_pos.y - rp->y);
               rp->x += sign(My_pos.x - rp->x);
               if (rp->y <= 0)
                       rp->y = 0;
               else if (rp->y >= Y_FIELDSIZE)
                       rp->y = Y_FIELDSIZE - 1;
               if (rp->x <= 0)
                       rp->x = 0;
               else if (rp->x >= X_FIELDSIZE)
                       rp->x = X_FIELDSIZE - 1;
               Field[rp->y][rp->x]++;
       }

       Min.y = Y_FIELDSIZE;
       Min.x = X_FIELDSIZE;
       Max.y = 0;
       Max.x = 0;
       for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++)
               if (rp->y < 0)
                       continue;
               else if (rp->y == My_pos.y && rp->x == My_pos.x)
                       Dead = TRUE;
               else if (Field[rp->y][rp->x] > 1) {
                       mvaddch(rp->y, rp->x, HEAP);
                       rp->y = -1;
                       Num_robots--;
                       if (Waiting)
                               Wait_bonus++;
                       add_score(ROB_SCORE);
               }
               else {
                       mvaddch(rp->y, rp->x, ROBOT);
                       if (rp->y < Min.y)
                               Min.y = rp->y;
                       if (rp->x < Min.x)
                               Min.x = rp->x;
                       if (rp->y > Max.y)
                               Max.y = rp->y;
                       if (rp->x > Max.x)
                               Max.x = rp->x;
               }

       if (was_sig) {
               refresh();
               if (Dead || Num_robots <= 0)
                       longjmp(End_move);
       }

# ifdef DEBUG
       standout();
       move(Min.y, Min.x);
       addch(inch());
       move(Max.y, Max.x);
       addch(inch());
       standend();
# endif DEBUG
       if (Real_time)
               alarm(3);
}

/*
* add_score:
*      Add a score to the overall point total
*/
add_score(add)
int     add;
{
       Score += add;
       move(Y_SCORE, X_SCORE);
       printw("%d", Score);
}

/*
* sign:
*      Return the sign of the number
*/
sign(n)
int     n;
{
       if (n < 0)
               return -1;
       else if (n > 0)
               return 1;
       else
               return 0;
}