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annotate libmlk-rpg/rpg/battle-entity-state-blinking.c @ 254:6367b976112d

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rpg: merge battle state switchers to remove number of files
author David Demelier <markand@malikania.fr>
date Thu, 03 Dec 2020 13:49:54 +0100
parents 71b3b7036de7
children 196264679079
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1 /*
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2 * battle-entity-state-blinking.c -- the entity is blinking
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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 <stdlib.h>
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21
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22 #include <core/alloc.h>
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23 #include <core/panic.h>
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24 #include <core/sprite.h>
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25 #include <core/texture.h>
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26
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27 #include "battle-entity.h"
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28 #include "battle-entity-state.h"
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29 #include "character.h"
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30
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31 #define TRANSPARENT (150)
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32 #define OPAQUE (255)
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33
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34 struct blink {
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35 struct battle_entity_state state;
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36 struct texture *tex;
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37 unsigned int elapsed;
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38 unsigned int count;
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39 };
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40
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41 static bool
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42 update(struct battle_entity_state *st, struct battle_entity *et, unsigned int ticks)
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43 {
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44 (void)et;
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45
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46 struct blink *blk = st->data;
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47
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48 blk->elapsed += ticks;
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49
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50 if (blk->elapsed >= 80) {
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51 blk->count += 1;
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52 blk->elapsed = 0;
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53 }
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54
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55 texture_set_alpha_mod(blk->tex, blk->count % 2 == 0 ? TRANSPARENT : OPAQUE);
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56
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57 return blk->count >= 3;
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58 }
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59
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60 static void
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61 finish(struct battle_entity_state *st, struct battle_entity *et)
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62 {
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63 (void)et;
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64
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65 free(st->data);
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66 }
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67
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68 void
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69 battle_entity_state_blinking(struct battle_entity *et)
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70 {
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71 assert(et);
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72
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73 struct blink *blk;
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74
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75 if (!(blk = alloc_new0(sizeof (*blk))))
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76 panic();
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77
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78 blk->tex = et->ch->sprites[CHARACTER_SPRITE_NORMAL]->texture;
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79 texture_set_alpha_mod(blk->tex, TRANSPARENT);
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80
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81 blk->state.data = blk;
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82 blk->state.update = update;
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83 blk->state.finish = finish;
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84
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85 battle_entity_switch(et, &blk->state);
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86 }