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annotate rogue4/chase.c @ 296:000b1c5b8d63

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UltraRogue: fix inventory collision after save and restore. Inventory letters are based on "identifiers" stored in objects' o_ident field. Identifiers are allocated by get_ident(), which keeps a list of objects that have them, to avoid giving the same identifier to multiple objects. The list is not stored in the savefile, so after restore, get_ident() was not aware of existing identifiers. This resulted in picked-up objects having the same inventory letters as objects restored from the file. The restore code now adds all objects with identifiers to the list.
author John "Elwin" Edwards
date Mon, 15 Jan 2018 20:20:35 -0500
parents 1b73a8641b37
children e52a8a7ad4c5
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12
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1 /*
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2 * Code for one creature to chase another
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3 *
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4 * @(#)chase.c 4.25 (Berkeley) 5/5/82
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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, 1982 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 <stdlib.h>
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14 #include <curses.h>
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15 #include "rogue.h"
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16
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17 #define DRAGONSHOT 5 /* one chance in DRAGONSHOT that a dragon will flame */
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18
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19 coord ch_ret; /* Where chasing takes you */
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20
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21 bool chase(THING *tp, coord *ee);
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22 int do_chase(THING *th);
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23 coord *find_dest(THING *tp);
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24
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25 /*
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26 * runners:
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27 * Make all the running monsters move.
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28 */
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29 void
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30 runners(void)
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31 {
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32 register THING *tp;
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33 register THING *ntp;
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34
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35 for (tp = mlist; tp != NULL; tp = ntp)
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36 {
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37 ntp = next(tp);
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38 if (!on(*tp, ISHELD) && on(*tp, ISRUN))
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39 {
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40 if (!on(*tp, ISSLOW) || tp->t_turn)
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41 if (do_chase(tp) == -1)
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42 continue;
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43 if (on(*tp, ISHASTE))
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44 if (do_chase(tp) == -1)
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45 continue;
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46 tp->t_turn ^= TRUE;
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47 }
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48 }
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49 }
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50
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51 /*
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52 * do_chase:
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53 * Make one thing chase another.
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54 */
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55 int
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56 do_chase(THING *th)
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57 {
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58 register struct room *rer, *ree; /* room of chaser, room of chasee */
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59 register int mindist = 32767, i, dist;
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60 register bool stoprun = FALSE; /* TRUE means we are there */
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61 register char sch;
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62 register bool door;
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63 register THING *obj;
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64 register struct room *oroom;
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65 coord this; /* Temporary destination for chaser */
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66
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67 rer = th->t_room; /* Find room of chaser */
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68 if (on(*th, ISGREED) && rer->r_goldval == 0)
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69 th->t_dest = &hero; /* If gold has been taken, run after hero */
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70 if (th->t_dest == &hero) /* Find room of chasee */
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71 ree = proom;
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72 else
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73 ree = roomin(th->t_dest);
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74 /*
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75 * We don't count doors as inside rooms for this routine
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76 */
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77 door = (chat(th->t_pos.y, th->t_pos.x) == DOOR);
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78 /*
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79 * If the object of our desire is in a different room,
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80 * and we are not in a corridor, run to the door nearest to
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81 * our goal.
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82 */
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83 over:
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84 if (rer != ree)
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85 {
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86 for (i = 0; i < rer->r_nexits; i++) /* loop through doors */
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87 {
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88 dist = DISTANCE(th->t_dest->y, th->t_dest->x,
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89 rer->r_exit[i].y, rer->r_exit[i].x);
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90 if (dist < mindist)
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91 {
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92 this = rer->r_exit[i];
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93 mindist = dist;
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94 }
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95 }
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96 if (door)
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97 {
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98 rer = &passages[flat(th->t_pos.y, th->t_pos.x) & F_PNUM];
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99 door = FALSE;
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100 goto over;
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101 }
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102 }