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annotate xrogue/passages.c @ 294:fe6b7a1a6dfc

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Improve the documentation build process. The choice between troff implementations is now made at configure time, rather than using shell logic in the Makefile to choose while building.
author John "Elwin" Edwards
date Sat, 30 Dec 2017 14:15:52 -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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