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move_robs.c revision 1.7 
      1 /*	$NetBSD: move_robs.c,v 1.7 2003/08/07 09:37:37 agc Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)move_robs.c	8.1 (Berkeley) 5/31/93";
     36 #else
     37 __RCSID("$NetBSD: move_robs.c,v 1.7 2003/08/07 09:37:37 agc Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 # include	"robots.h"
     42 
     43 /*
     44  * move_robots:
     45  *	Move the robots around
     46  */
     47 void
     48 move_robots(was_sig)
     49 	int	was_sig;
     50 {
     51 	COORD		*rp;
     52 
     53 	if (Real_time)
     54 		signal(SIGALRM, move_robots);
     55 # ifdef DEBUG
     56 	move(Min.y, Min.x);
     57 	addch(inch());
     58 	move(Max.y, Max.x);
     59 	addch(inch());
     60 # endif /* DEBUG */
     61 	for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++) {
     62 		if (rp->y < 0)
     63 			continue;
     64 		mvaddch(rp->y, rp->x, ' ');
     65 		Field[rp->y][rp->x]--;
     66 		rp->y += sign(My_pos.y - rp->y);
     67 		rp->x += sign(My_pos.x - rp->x);
     68 		if (rp->y <= 0)
     69 			rp->y = 0;
     70 		else if (rp->y >= Y_FIELDSIZE)
     71 			rp->y = Y_FIELDSIZE - 1;
     72 		if (rp->x <= 0)
     73 			rp->x = 0;
     74 		else if (rp->x >= X_FIELDSIZE)
     75 			rp->x = X_FIELDSIZE - 1;
     76 		Field[rp->y][rp->x]++;
     77 	}
     78 
     79 	Min.y = Y_FIELDSIZE;
     80 	Min.x = X_FIELDSIZE;
     81 	Max.y = 0;
     82 	Max.x = 0;
     83 	for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++)
     84 		if (rp->y < 0)
     85 			continue;
     86 		else if (rp->y == My_pos.y && rp->x == My_pos.x)
     87 			Dead = TRUE;
     88 		else if (Field[rp->y][rp->x] > 1) {
     89 			mvaddch(rp->y, rp->x, HEAP);
     90 			Scrap[Num_scrap++] = *rp;
     91 			rp->y = -1;
     92 			Num_robots--;
     93 			if (Waiting)
     94 				Wait_bonus++;
     95 			add_score(ROB_SCORE);
     96 		}
     97 		else {
     98 			mvaddch(rp->y, rp->x, ROBOT);
     99 			if (rp->y < Min.y)
    100 				Min.y = rp->y;
    101 			if (rp->x < Min.x)
    102 				Min.x = rp->x;
    103 			if (rp->y > Max.y)
    104 				Max.y = rp->y;
    105 			if (rp->x > Max.x)
    106 				Max.x = rp->x;
    107 		}
    108 
    109 	if (was_sig) {
    110 		refresh();
    111 		if (Dead || Num_robots <= 0)
    112 			longjmp(End_move, 0);
    113 	}
    114 
    115 # ifdef DEBUG
    116 	standout();
    117 	move(Min.y, Min.x);
    118 	addch(inch());
    119 	move(Max.y, Max.x);
    120 	addch(inch());
    121 	standend();
    122 # endif /* DEBUG */
    123 	if (Real_time)
    124 		alarm(3);
    125 }
    126 
    127 /*
    128  * add_score:
    129  *	Add a score to the overall point total
    130  */
    131 void
    132 add_score(add)
    133 	int	add;
    134 {
    135 	Score += add;
    136 	move(Y_SCORE, X_SCORE);
    137 	printw("%d", Score);
    138 }
    139 
    140 /*
    141  * sign:
    142  *	Return the sign of the number
    143  */
    144 int
    145 sign(n)
    146 	int	n;
    147 {
    148 	if (n < 0)
    149 		return -1;
    150 	else if (n > 0)
    151 		return 1;
    152 	else
    153 		return 0;
    154 }
    155