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annotate src/libmlk-rpg/rpg/walksprite.c @ 402:d3fa956cdaf0

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core: add alloc_sdupf
author David Demelier <markand@malikania.fr>
date Wed, 30 Mar 2022 15:06:55 +0200
parents 460c78706989
children 8f59201dc76b
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1 /*
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2 * walksprite.c -- sprite designed for walking entities
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3 *
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4 * Copyright (c) 2020-2022 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 <string.h>
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21
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22 #include <core/sprite.h>
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24 #include "walksprite.h"
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25
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26 void
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27 walksprite_init(struct walksprite *ws, struct sprite *sprite, unsigned int delay)
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28 {
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29 assert(ws);
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30 assert(sprite);
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32 memset(ws, 0, sizeof (*ws));
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33 ws->sprite = sprite;
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34 ws->delay = delay;
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35 }
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36
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37 void
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38 walksprite_reset(struct walksprite *ws)
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39 {
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40 assert(ws);
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41
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42 ws->index = 0;
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43 }
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44
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45 void
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46 walksprite_update(struct walksprite *ws, unsigned int ticks)
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47 {
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48 assert(ws);
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49
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50 ws->elapsed += ticks;
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51
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52 if (ws->elapsed >= ws->delay) {
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53 ws->index += 1;
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54
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55 if (ws->index >= ws->sprite->ncols)
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56 ws->index = 0;
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57
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58 ws->elapsed = 0;
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59 }
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60 }
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61
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62 void
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63 walksprite_draw(const struct walksprite *ws, unsigned int orientation, int x, int y)
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64 {
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65 assert(ws);
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66 assert(orientation < 8);
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67
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68 sprite_draw(ws->sprite, orientation, ws->index, x, y);
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69 }