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annotate srogue/passages.c @ 306:057c5114e244

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Super-Rogue: fix some out-of-range constants. Constants K_ARROW etc., for causes of death other than monsters, are in the 240-255 range. They were often passed to functions taking char, which is usually signed, making the values out of range. The function declarations have been changed to unsigned char, which is also the type used by the scoreboard code.
author John "Elwin" Edwards
date Sat, 17 Apr 2021 15:41:12 -0400
parents e52a8a7ad4c5
children 13b482bd9e66
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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 9.0 (rdk) 7/17/84
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5 *
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6 * Super-Rogue
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7 * Copyright (C) 1984 Robert D. Kindelberger
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8 * All rights reserved.
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9 *
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10 * Based on "Rogue: Exploring the Dungeons of Doom"
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11 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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12 * All rights reserved.
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13 *
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14 * See the file LICENSE.TXT for full copyright and licensing information.
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15 */
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16
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17 #include <stdlib.h>
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18 #include "rogue.h"
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19 #include "rogue.ext"
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20
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21 void conn(int r1, int r2);
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22 void door(struct room *rm, struct coord *cp);
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23
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24 /*
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25 * do_passages:
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26 * Draw all the passages on a level.
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27 */
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28
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29 void
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30 do_passages(void)
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31 {
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32 reg struct rdes *r1, *r2 = NULL;
36
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33 reg int i, j;
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34 reg int roomcount;
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35 static struct rdes {
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36 bool conn[MAXROOMS]; /* possible to connect to room i */
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37 bool isconn[MAXROOMS]; /* connection was made to room i */
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38 bool ingraph; /* this room in graph already? */
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39 } rdes[MAXROOMS] = {
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40 {{ 0, 1, 0, 1, 0, 0, 0, 0, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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41 {{ 1, 0, 1, 0, 1, 0, 0, 0, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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42 {{ 0, 1, 0, 0, 0, 1, 0, 0, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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43 {{ 1, 0, 0, 0, 1, 0, 1, 0, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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44 {{ 0, 1, 0, 1, 0, 1, 0, 1, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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45 {{ 0, 0, 1, 0, 1, 0, 0, 0, 1 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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46 {{ 0, 0, 0, 1, 0, 0, 0, 1, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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47 {{ 0, 0, 0, 0, 1, 0, 1, 0, 1 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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48 {{ 0, 0, 0, 0, 0, 1, 0, 1, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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49 };
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50
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51 /*
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52 * reinitialize room graph description
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53 */
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54 for (r1 = rdes; r1 < &rdes[MAXROOMS]; r1++) {
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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 * find a room to connect with
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70 */
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71 j = 0;
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72 for (i = 0; i < MAXROOMS; i++)
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73 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
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74 r2 = &rdes[i];
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75 /*
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76 * if no adjacent rooms are outside the graph, pick a new room
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77 * to look from
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78 */
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79 if (j == 0) {
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80 do {
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81 r1 = &rdes[rnd(MAXROOMS)];
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82 } until (r1->ingraph);
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83 }
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84 /*
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85 * otherwise, connect new room to the graph, and draw a tunnel
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86 * to it
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87 */
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88 else {
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89 r2->ingraph = TRUE;
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90 i = r1 - rdes;
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91 j = r2 - rdes;
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92 conn(i, j);
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93 r1->isconn[j] = TRUE;
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94 r2->isconn[i] = TRUE;
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95 roomcount++;
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96 }
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97 } while (roomcount < MAXROOMS);
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98
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99 /*
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100 * attempt to add passages to the graph a random number of times so
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101 * that there isn't just one unique passage through it.
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