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annotate xrogue/bolt.c @ 212:12e070d1a780

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rogue3: replace alarm() calls with a portable function. Calls to alarm() in main.c are replaced with md_start_checkout_timer(), so the #ifdefs around nonportable code can be confined to mdport.c.
author John "Elwin" Edwards
date Fri, 22 Jan 2016 19:19:48 -0500
parents e6179860cb76
children f54901b9c39b
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133
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1 /*
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2 bolt.c - functions shooting an object across the room
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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 <ctype.h>
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21 #include "rogue.h"
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22
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23 /*
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24 * shoot_bolt fires a bolt from the given starting point in the
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25 * given direction
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26 */
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27
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28 shoot_bolt(shooter, start, dir, get_points, reason, name, damage)
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29 struct thing *shooter;
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30 coord start, dir;
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31 bool get_points;
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32 short reason;
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33 char *name;
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34 int damage;
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35 {
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36 unsigned char dirch = 0, ch;
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37 bool used, change, see_him;
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38 short y, x, bounces;
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39 coord pos;
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40 struct linked_list *target=NULL;
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41 struct {
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42 coord place;
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43 char oldch;
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44 } spotpos[BOLT_LENGTH];
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45
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46 switch (dir.y + dir.x) {
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47 case 0: dirch = '/';
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48 when 1: case -1: dirch = (dir.y == 0 ? '-' : '|');
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49 when 2: case -2: dirch = '\\';
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50 }
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51 pos.y = start.y + dir.y;
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52 pos.x = start.x + dir.x;
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53 used = FALSE;
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54 change = FALSE;
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55
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56 bounces = 0; /* No bounces yet */
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57 nofont(cw);
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58 for (y = 0; y < BOLT_LENGTH && !used; y++) {
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59 ch = winat(pos.y, pos.x);
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60 spotpos[y].place = pos;
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61 spotpos[y].oldch = mvwinch(cw, pos.y, pos.x);
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62
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63 /* Are we at hero? */
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64 if (ce(pos, hero)) goto at_hero;
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65
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66 switch (ch) {
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67 case SECRETDOOR:
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68 case VERTWALL:
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69 case HORZWALL:
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70 case ' ':
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71 if (dirch == '-' || dirch == '|') {
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72 dir.y = -dir.y;
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73 dir.x = -dir.x;
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74 }
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75 else {
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76 unsigned char chx = mvinch(pos.y-dir.y, pos.x),
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77 chy = mvinch(pos.y, pos.x-dir.x);
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78 bool anychange = FALSE; /* Did we change anthing */
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79
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80 if (chy == WALL || chy == SECRETDOOR ||
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81 chy == HORZWALL || chy == VERTWALL) {
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82 dir.y = -dir.y;
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83 change ^= TRUE; /* Change at least one direction */
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84 anychange = TRUE;
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85 }
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86 if (chx == WALL || chx == SECRETDOOR ||
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87 chx == HORZWALL || chx == VERTWALL) {
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88 dir.x = -dir.x;
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89 change ^= TRUE; /* Change at least one direction */
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90 anychange = TRUE;
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91 }
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92
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93 /* If we didn't make any change, make both changes */