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annotate rogue3/chase.c @ 221:71cb5b647f2b

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Rogue V5: remove troublesome automatic platform detection. configure.ac used AC_CANONICAL_SYSTEM to guess the GNU system description triplets. The target description was substituted into the Makefile and formatted into the filename for the binary distribution tarball. But 'target' is only intended for cross-compilers. 'host_os' might have been a better choice. The tarball filename can still be changed manually, by running make with an argument of 'DESTSYS=systemname'. Cross-compiling may be more difficult now, but I am not certain that it worked properly previously, and due to pending autoconf changes, it was likely to break anyway. The top-level config.guess and config.sub are no longer needed, but they may reappear if better support for cross-compilation is added.
author John "Elwin" Edwards
date Fri, 12 Feb 2016 14:25:47 -0500
parents d9e44e18eeec
children
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1 /*
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2 * Code for one object to chase another
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3 *
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4 * @(#)chase.c 3.17 (Berkeley) 6/15/81
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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8 * All rights reserved.
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9 *
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10 * See the file LICENSE.TXT for full copyright and licensing information.
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11 */
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12
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13 #include "curses.h"
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14 #include "rogue.h"
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15
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16 coord ch_ret; /* Where chasing takes you */
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17
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18 /*
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19 * runners:
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20 * Make all the running monsters move.
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21 */
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22
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23 void
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24 runners()
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25 {
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26 struct linked_list *item;
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27 struct thing *tp;
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28
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29 for (item = mlist; item != NULL;)
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30 {
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31 tp = (struct thing *) ldata(item);
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32 item = next(item);
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33 if (off(*tp, ISHELD) && on(*tp, ISRUN))
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34 {
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35 if (off(*tp, ISSLOW) || tp->t_turn)
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36 if (do_chase(tp) == -1)
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37 continue;
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38 if (on(*tp, ISHASTE))
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39 if (do_chase(tp) == -1)
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40 continue;
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41 tp->t_turn ^= TRUE;
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42 }
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43 }
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44 }
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45
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46 /*
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47 * do_chase:
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48 * Make one thing chase another.
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49 */
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50
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51 int
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52 do_chase(struct thing *th)
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53 {
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54 struct room *rer, *ree; /* room of chaser, room of chasee */
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55 int mindist = 32767, i, dist;
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56 int stoprun = FALSE; /* TRUE means we are there */
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57 int sch;
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58 coord this; /* Temporary destination for chaser */
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59
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60 rer = roomin(&th->t_pos); /* Find room of chaser */
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61 ree = roomin(th->t_dest); /* Find room of chasee */
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62 /*
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63 * We don't count doors as inside rooms for this routine
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64 */
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65 if (mvwinch(stdscr, th->t_pos.y, th->t_pos.x) == DOOR)
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66 rer = NULL;
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67 this = *th->t_dest;
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68 /*
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69 * If the object of our desire is in a different room,
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70 * than we are and we ar not in a corridor, run to the
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71 * door nearest to our goal.
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72 */
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73 if (rer != NULL && rer != ree)
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74 for (i = 0; i < rer->r_nexits; i++) /* loop through doors */
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75 {
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76 dist = DISTANCE(th->t_dest->y, th->t_dest->x,
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77 rer->r_exit[i].y, rer->r_exit[i].x);
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78 if (dist < mindist) /* minimize distance */
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79 {
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80 this = rer->r_exit[i];
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81 mindist = dist;
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82 }
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83 }
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84 /*
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85 * this now contains what we want to run to this time
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86 * so we run to it. If we hit it we either want to fight it
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87 * or stop running
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88 */
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89 if (!chase(th, &this))
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90 {
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91 if (ce(this, hero))
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92 {
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93 return( attack(th) );
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94 }
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95 else if (th->t_type != 'F')
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96 stoprun = TRUE;
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97 }
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98 else if (th->t_type == 'F')
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99 return(0);
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100 mvwaddch(cw, th->t_pos.y, th->t_pos.x, th->t_oldch);
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101 sch = mvwinch(cw, ch_ret.y, ch_ret.x);
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102 if (rer != NULL && (rer->r_flags & ISDARK) && sch == FLOOR
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103 && DISTANCE(ch_ret.y, ch_ret.x, th->t_pos.y, th->t_pos.x) < 3
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104 && off(player, ISBLIND))
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