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annotate xrogue/passages.c @ 223:0e99eade579c

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Generate text documentation from the troff source files. This is done by make, in the 'docs' target, which is now part of the normal build process. Unfortunately, not all the games include troff sources. Getting decent HTML output from groff is still a difficult process which will not be attempted at this time. There are a few bugs in the 'install' and 'uninstall' rules. Not to mention that the documentation is sometimes inaccurate.
author John "Elwin" Edwards
date Sun, 21 Feb 2016 20:47:12 -0500
parents e6179860cb76
children f54901b9c39b
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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 <curses.h>
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20 #include "rogue.h"
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21
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22 /*
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23 * do_passages:
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24 * Draw all the passages on a level.
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25 */
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26
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27 do_passages()
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28 {
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29 register struct rdes *r1, *r2 = NULL;
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30 register int i, j;
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31 register int roomcount;
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32 static struct rdes
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33 {
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34 bool conn[MAXROOMS]; /* possible to connect to room i? */
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35 bool isconn[MAXROOMS]; /* connection been made to room i? */
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36 bool ingraph; /* this room in graph already? */
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37 } rdes[MAXROOMS] = {
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38 { { 0, 1, 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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39 { { 1, 0, 1, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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40 { { 0, 1, 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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41 { { 1, 0, 0, 0, 1, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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42 { { 0, 1, 0, 1, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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43 { { 0, 0, 1, 0, 1, 0, 0, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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44 { { 0, 0, 0, 1, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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45 { { 0, 0, 0, 0, 1, 0, 1, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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46 { { 0, 0, 0, 0, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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47 };
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48
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49 /*
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50 * reinitialize room graph description
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51 */
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52 for (i = 0; i < MAXROOMS; i++)
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53 {
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54 r1 = &rdes[i];
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55 for (j = 0; j < MAXROOMS; j++)
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56 r1->isconn[j] = FALSE;
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57 r1->ingraph = FALSE;
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58 }
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59
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60 /*
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61 * starting with one room, connect it to a random adjacent room and
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62 * then pick a new room to start with.
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63 */
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64 roomcount = 1;
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65 r1 = &rdes[rnd(MAXROOMS)];
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66 r1->ingraph = TRUE;
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67 do
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68 {
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69 /*
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70 * find a room to connect with
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71 */
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72 j = 0;
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73 for (i = 0; i < MAXROOMS; i++)
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74 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
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75 r2 = &rdes[i];
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76 /*
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77 * if no adjacent rooms are outside the graph, pick a new room
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78 * to look from
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79 */
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80 if (j == 0)
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81 {
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82 do
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83 r1 = &rdes[rnd(MAXROOMS)];
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84 until (r1->ingraph);
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85 }
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86 /*
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87 * otherwise, connect new room to the graph, and draw a tunnel
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88 * to it
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89 */
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90 else
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91 {
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