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move_robs.c revision 1.9 
      1 /*	$NetBSD: move_robs.c,v 1.9 2009/07/20 06:00:56 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 1.9 2009/07/20 06:00:56 dholland 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(int was_sig)
     49 {
     50 	COORD *rp;
     51 
     52 	if (Real_time)
     53 		signal(SIGALRM, move_robots);
     54 #ifdef DEBUG
     55 	move(Min.y, Min.x);
     56 	addch(inch());
     57 	move(Max.y, Max.x);
     58 	addch(inch());
     59 #endif /* DEBUG */
     60 	for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++) {
     61 		if (rp->y < 0)
     62 			continue;
     63 		mvaddch(rp->y, rp->x, ' ');
     64 		Field[rp->y][rp->x]--;
     65 		rp->y += sign(My_pos.y - rp->y);
     66 		rp->x += sign(My_pos.x - rp->x);
     67 		if (rp->y <= 0)
     68 			rp->y = 0;
     69 		else if (rp->y >= Y_FIELDSIZE)
     70 			rp->y = Y_FIELDSIZE - 1;
     71 		if (rp->x <= 0)
     72 			rp->x = 0;
     73 		else if (rp->x >= X_FIELDSIZE)
     74 			rp->x = X_FIELDSIZE - 1;
     75 		Field[rp->y][rp->x]++;
     76 	}
     77 
     78 	Min.y = Y_FIELDSIZE;
     79 	Min.x = X_FIELDSIZE;
     80 	Max.y = 0;
     81 	Max.x = 0;
     82 	for (rp = Robots; rp < &Robots[MAXROBOTS]; rp++)
     83 		if (rp->y < 0)
     84 			continue;
     85 		else if (rp->y == My_pos.y && rp->x == My_pos.x)
     86 			Dead = TRUE;
     87 		else if (Field[rp->y][rp->x] > 1) {
     88 			mvaddch(rp->y, rp->x, HEAP);
     89 			Scrap[Num_scrap++] = *rp;
     90 			rp->y = -1;
     91 			Num_robots--;
     92 			if (Waiting)
     93 				Wait_bonus++;
     94 			add_score(ROB_SCORE);
     95 		}
     96 		else {
     97 			mvaddch(rp->y, rp->x, ROBOT);
     98 			if (rp->y < Min.y)
     99 				Min.y = rp->y;
    100 			if (rp->x < Min.x)
    101 				Min.x = rp->x;
    102 			if (rp->y > Max.y)
    103 				Max.y = rp->y;
    104 			if (rp->x > Max.x)
    105 				Max.x = rp->x;
    106 		}
    107 
    108 	if (was_sig) {
    109 		refresh();
    110 		if (Dead || Num_robots <= 0)
    111 			longjmp(End_move, 0);
    112 	}
    113 
    114 #ifdef DEBUG
    115 	standout();
    116 	move(Min.y, Min.x);
    117 	addch(inch());
    118 	move(Max.y, Max.x);
    119 	addch(inch());
    120 	standend();
    121 #endif /* DEBUG */
    122 	if (Real_time)
    123 		alarm(3);
    124 }
    125 
    126 /*
    127  * add_score:
    128  *	Add a score to the overall point total
    129  */
    130 void
    131 add_score(int add)
    132 {
    133 	Score += add;
    134 	move(Y_SCORE, X_SCORE);
    135 	printw("%d", Score);
    136 }
    137 
    138 /*
    139  * sign:
    140  *	Return the sign of the number
    141  */
    142 int
    143 sign(int n)
    144 {
    145 	if (n < 0)
    146 		return -1;
    147 	else if (n > 0)
    148 		return 1;
    149 	else
    150 		return 0;
    151 }
    152