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annotate rogue3/passages.c @ 284:6376b514a30b

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Fix more header-related warnings. This fixes all current default warnings with GCC7 on Linux. That does not mean the code is anywhere close to clean.
author John "Elwin" Edwards
date Fri, 22 Sep 2017 16:24:40 -0400
parents d9e44e18eeec
children e52a8a7ad4c5
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1 /*
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2 * Draw the connecting passages
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3 *
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4 * @(#)passages.c 3.4 (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 <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 /*
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18 * do_passages:
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19 * Draw all the passages on a level.
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20 */
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21
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22 void
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23 do_passages()
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24 {
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d9e44e18eeec rogue3: initialize various pointers.
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25 struct rdes *r1, *r2 = NULL;
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26 int i, j;
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27 int roomcount;
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28 static struct rdes
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29 {
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30 bool conn[MAXROOMS]; /* possible to connect to room i? */
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31 bool isconn[MAXROOMS]; /* connection been made to room i? */
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32 bool ingraph; /* this room in graph already? */
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33 } rdes[MAXROOMS] = {
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34 { { 0, 1, 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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35 { { 1, 0, 1, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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36 { { 0, 1, 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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37 { { 1, 0, 0, 0, 1, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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38 { { 0, 1, 0, 1, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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39 { { 0, 0, 1, 0, 1, 0, 0, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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40 { { 0, 0, 0, 1, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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41 { { 0, 0, 0, 0, 1, 0, 1, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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42 { { 0, 0, 0, 0, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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43 };
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44
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45 /*
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46 * reinitialize room graph description
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47 */
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48 for (r1 = rdes; r1 <= &rdes[MAXROOMS-1]; r1++)
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49 {
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50 for (j = 0; j < MAXROOMS; j++)
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51 r1->isconn[j] = FALSE;
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52 r1->ingraph = FALSE;
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53 }
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54
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55 /*
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56 * starting with one room, connect it to a random adjacent room and
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57 * then pick a new room to start with.
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58 */
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59 roomcount = 1;
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60 r1 = &rdes[rnd(MAXROOMS)];
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61 r1->ingraph = TRUE;
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62 do
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63 {
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64 /*
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65 * find a room to connect with
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66 */
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67 j = 0;
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68 for (i = 0; i < MAXROOMS; i++)
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69 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
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70 r2 = &rdes[i];
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71 /*
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72 * if no adjacent rooms are outside the graph, pick a new room
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73 * to look from
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74 */
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75 if (j == 0)
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76 {
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77 do
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78 r1 = &rdes[rnd(MAXROOMS)];
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79 until (r1->ingraph);
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80 }
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81 /*
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82 * otherwise, connect new room to the graph, and draw a tunnel
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83 * to it
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84 */
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85 else
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86 {
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87 r2->ingraph = TRUE;
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88 i = (int)(r1 - rdes);
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89 j = (int)(r2 - rdes);
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90 conn(i, j);
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91 r1->isconn[j] = TRUE;
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92 r2->isconn[i] = TRUE;
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93 roomcount++;
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94 }
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95 } while (roomcount < MAXROOMS);
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96
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97 /*
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98 * attempt to add passages to the graph a random number of times so
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99 * that there isn't just one unique passage through it.
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100 */
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101 for (roomcount = rnd(5); roomcount > 0; roomcount--)
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102 {
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103 r1 = &rdes[rnd(MAXROOMS)]; /* a random room to look from */
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