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annotate xrogue/passages.c @ 255:69ffcb6b90da

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Merge the bugfix branch, which had missed an update.
author John "Elwin" Edwards
date Fri, 10 Feb 2017 09:06:50 -0500
parents f54901b9c39b
children e52a8a7ad4c5
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1 /*
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2 passages.c - Draw the connecting passages
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3
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4 XRogue: Expeditions into the Dungeons of Doom
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5 Copyright (C) 1991 Robert Pietkivitch
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6 All rights reserved.
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7
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8 Based on "Advanced Rogue"
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9 Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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10 All rights reserved.
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11
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12 Based on "Rogue: Exploring the Dungeons of Doom"
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13 Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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14 All rights reserved.
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15
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16 See the file LICENSE.TXT for full copyright and licensing information.
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17 */
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18
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19 #include <stdlib.h>
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20 #include <curses.h>
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21 #include "rogue.h"
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22
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23 void conn(int r1, int r2);
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24 void door(struct room *rm, coord *cp);
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25
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26 /*
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27 * do_passages:
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28 * Draw all the passages on a level.
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29 */
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30
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31 void
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32 do_passages(void)
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33 {
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34 register struct rdes *r1, *r2 = NULL;
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35 register int i, j;
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36 register int roomcount;
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37 static struct rdes
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38 {
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39 bool conn[MAXROOMS]; /* possible to connect to room i? */
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40 bool isconn[MAXROOMS]; /* connection been made to room i? */
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41 bool ingraph; /* this room in graph already? */
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42 } rdes[MAXROOMS] = {
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43 { { 0, 1, 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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44 { { 1, 0, 1, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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45 { { 0, 1, 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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46 { { 1, 0, 0, 0, 1, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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47 { { 0, 1, 0, 1, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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48 { { 0, 0, 1, 0, 1, 0, 0, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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49 { { 0, 0, 0, 1, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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50 { { 0, 0, 0, 0, 1, 0, 1, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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51 { { 0, 0, 0, 0, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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52 };
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53
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54 /*
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55 * reinitialize room graph description
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56 */
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57 for (i = 0; i < MAXROOMS; i++)
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58 {
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59 r1 = &rdes[i];
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60 for (j = 0; j < MAXROOMS; j++)
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61 r1->isconn[j] = FALSE;
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62 r1->ingraph = FALSE;
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63 }
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64
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65 /*
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66 * starting with one room, connect it to a random adjacent room and
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67 * then pick a new room to start with.
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68 */
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69 roomcount = 1;
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70 r1 = &rdes[rnd(MAXROOMS)];
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71 r1->ingraph = TRUE;
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72 do
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73 {
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74 /*
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75 * find a room to connect with
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76 */
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77 j = 0;
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78 for (i = 0; i < MAXROOMS; i++)
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79 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
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80 r2 = &rdes[i];
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81 /*
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82 * if no adjacent rooms are outside the graph, pick a new room
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83 * to look from
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84 */
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85 if (j == 0)
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86 {
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87 do
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88 r1 = &rdes[rnd(MAXROOMS)];
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89 until (r1->ingraph);
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90 }
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