Mercurial > molko
annotate libmlk-adventure/adventure/action/spawner.c @ 275:f89a53abb314
adventure: cleanup actions and prepare map scenes
author | David Demelier <markand@malikania.fr> |
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date | Sun, 13 Dec 2020 11:01:18 +0100 |
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1 /* |
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2 * spawner.c -- spawn battle while moving |
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3 * |
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #include <assert.h> |
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20 #include <math.h> |
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21 #include <stdlib.h> |
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22 |
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23 #include <core/alloc.h> |
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24 #include <core/game.h> |
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25 #include <core/util.h> |
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26 |
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27 #include <rpg/map.h> |
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28 |
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29 #include "spawner.h" |
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30 |
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31 static inline unsigned int |
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32 distance(const struct spawner *s) |
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33 { |
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34 unsigned int gap_x = fmax(s->last_x, s->map->player_x) - |
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35 fmin(s->last_x, s->map->player_x); |
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36 unsigned int gap_y = fmax(s->last_y, s->map->player_y) - |
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37 fmin(s->last_y, s->map->player_y); |
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38 |
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39 return fmin(s->steps, gap_x + gap_y); |
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40 } |
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41 |
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42 static bool |
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43 update(struct action *act, unsigned int ticks) |
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44 { |
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45 (void)ticks; |
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46 |
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47 struct spawner *s = act->data; |
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48 |
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49 if (s->map->player_movement) { |
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50 s->steps -= distance(s); |
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51 s->last_x = s->map->player_x; |
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52 s->last_y = s->map->player_y; |
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53 |
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54 if (s->steps == 0) { |
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55 s->steps = util_nrand(s->low, s->high); |
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56 |
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57 /* TODO: start battle here. */ |
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58 return false; |
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59 } |
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60 } |
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61 |
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62 return false; |
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63 } |
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64 |
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65 void |
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66 spawner_init(struct spawner *s) |
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67 { |
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68 assert(s); |
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69 |
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70 s->last_x = s->map->player_x; |
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71 s->last_y = s->map->player_y; |
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72 s->steps = util_nrand(s->low, s->high); |
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73 } |
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74 |
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75 struct action * |
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76 spawner_action(struct spawner *s) |
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77 { |
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78 assert(s); |
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79 |
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80 s->action.data = s; |
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81 s->action.update = update; |
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82 |
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83 return &s->action; |
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84 } |