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      1 /*	$NetBSD: move_robs.c,v 1.10 2009/07/20 06:39:06 dholland 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 1.10 2009/07/20 06:39:06 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <curses.h>
     42 #include <signal.h>
     43 #include <unistd.h>
     44 #include "robots.h"
     45 
     46 /*
     47  * move_robots:
     48  *	Move the robots around
     49  */
     50 void
     51 move_robots(int was_sig)
     52 {
     53 	COORD *rp;
     54 
     55 	if (Real_time)
     56 		signal(SIGALRM, move_robots);
     57 #ifdef DEBUG
     58 	move(Min.y, Min.x);
     59 	addch(inch());
     60 	move(Max.y, Max.x);
     61 	addch(inch());
     62 #endif /* DEBUG */
     63 	for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++) {
     64 		if (rp->y < 0)
     65 			continue;
     66 		mvaddch(rp->y, rp->x, ' ');
     67 		Field[rp->y][rp->x]--;
     68 		rp->y += sign(My_pos.y - rp->y);
     69 		rp->x += sign(My_pos.x - rp->x);
     70 		if (rp->y <= 0)
     71 			rp->y = 0;
     72 		else if (rp->y >= Y_FIELDSIZE)
     73 			rp->y = Y_FIELDSIZE - 1;
     74 		if (rp->x <= 0)
     75 			rp->x = 0;
     76 		else if (rp->x >= X_FIELDSIZE)
     77 			rp->x = X_FIELDSIZE - 1;
     78 		Field[rp->y][rp->x]++;
     79 	}
     80 
     81 	Min.y = Y_FIELDSIZE;
     82 	Min.x = X_FIELDSIZE;
     83 	Max.y = 0;
     84 	Max.x = 0;
     85 	for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++)
     86 		if (rp->y < 0)
     87 			continue;
     88 		else if (rp->y == My_pos.y && rp->x == My_pos.x)
     89 			Dead = true;
     90 		else if (Field[rp->y][rp->x] > 1) {
     91 			mvaddch(rp->y, rp->x, HEAP);
     92 			Scrap[Num_scrap++] = *rp;
     93 			rp->y = -1;
     94 			Num_robots--;
     95 			if (Waiting)
     96 				Wait_bonus++;
     97 			add_score(ROB_SCORE);
     98 		}
     99 		else {
    100 			mvaddch(rp->y, rp->x, ROBOT);
    101 			if (rp->y < Min.y)
    102 				Min.y = rp->y;
    103 			if (rp->x < Min.x)
    104 				Min.x = rp->x;
    105 			if (rp->y > Max.y)
    106 				Max.y = rp->y;
    107 			if (rp->x > Max.x)
    108 				Max.x = rp->x;
    109 		}
    110 
    111 	if (was_sig) {
    112 		refresh();
    113 		if (Dead || Num_robots <= 0)
    114 			longjmp(End_move, 0);
    115 	}
    116 
    117 #ifdef DEBUG
    118 	standout();
    119 	move(Min.y, Min.x);
    120 	addch(inch());
    121 	move(Max.y, Max.x);
    122 	addch(inch());
    123 	standend();
    124 #endif /* DEBUG */
    125 	if (Real_time)
    126 		alarm(3);
    127 }
    128 
    129 /*
    130  * add_score:
    131  *	Add a score to the overall point total
    132  */
    133 void
    134 add_score(int add)
    135 {
    136 	Score += add;
    137 	move(Y_SCORE, X_SCORE);
    138 	printw("%d", Score);
    139 }
    140 
    141 /*
    142  * sign:
    143  *	Return the sign of the number
    144  */
    145 int
    146 sign(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