server/common/anim.C

/*
 * CrossFire, A Multiplayer game for X-windows
 * 
 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
 * Copyright (C) 2002-2003 Mark Wedel & Crossfire Development Team
 * Copyright (C) 1992 Frank Tore Johansen
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * The authors can be reached via e-mail at <crossfire@schmorp.de>
 */

/* This file contains animation related code. */

#include <global.h>
#include <stdio.h>

void
free_all_anim (void)
{
  for (int i = 0; i <= num_animations; i++)
    {
      animations[i].name = 0;
      free (animations[i].faces);
    }

  animations.clear ();
}

void
init_anim (void)
{
  char
    buf[MAX_BUF];
  FILE *
    fp;
  static int
    anim_init = 0;
  int
    num_frames = 0, faces[MAX_ANIMATIONS], i;

  if (anim_init)
    return;

  num_animations = 0;
  /* Make a default.  New animations start at one, so if something
   * thinks it is animated but hasn't set the animation_id properly,
   * it will have a default value that should be pretty obvious.
   */
  /* set the name so we don't try to dereferance null.
   * Put # at start so it will be first in alphabetical
   * order.
   */
  {
    animation anim0;

    anim0.name = "###none";
    anim0.num_animations = 1;
    anim0.faces = (uint16 *)malloc (sizeof (uint16));
    anim0.faces[0] = 0;
    anim0.facings = 0;

    animations.push_back (anim0);
  }

  sprintf (buf, "%s/animations", settings.datadir);
  LOG (llevDebug, "Reading animations from %s...\n", buf);

  if ((fp = fopen (buf, "r")) == NULL)
    {
      LOG (llevError, "Cannot open animations file %s: %s\n", buf, strerror (errno));
      exit (-1);
    }

  while (fgets (buf, MAX_BUF - 1, fp) != NULL)
    {
      if (*buf == '#')
        continue;

      /* Kill the newline */
      buf[strlen (buf) - 1] = '\0';
      if (!strncmp (buf, "anim ", 5))
        {
          if (num_frames)
            {
              LOG (llevError, "Didn't get a mina before %s\n", buf);
              num_frames = 0;
            }

          num_animations++;

          animation anim;

          anim.name = buf + 5;
          anim.num = num_animations;    /* for bsearch */
          anim.facings = 1;
          animations.push_back (anim);
        }
      else if (!strncmp (buf, "mina", 4))
        {
          animations[num_animations].faces = (uint16 *) malloc (sizeof (uint16) * num_frames);

          for (i = 0; i < num_frames; i++)
            animations[num_animations].faces[i] = faces[i];

          animations[num_animations].num_animations = num_frames;
          if (num_frames % animations[num_animations].facings)
            {
              LOG (llevDebug, "Animation %s frame numbers (%d) is not a multiple of facings (%d)\n",
                   &animations[num_animations].name, num_frames, animations[num_animations].facings);
            }
          num_frames = 0;
        }
      else if (!strncmp (buf, "facings", 7))
        {
          if (!(animations[num_animations].facings = atoi (buf + 7)))
            {
              LOG (llevDebug, "Animation %s has 0 facings, line=%s\n", &animations[num_animations].name, buf);
              animations[num_animations].facings = 1;
            }

        }
      else
        {
          if (!(faces[num_frames++] = FindFace (buf, 0)))
            LOG (llevDebug, "Could not find face %s for animation %s\n", buf, &animations[num_animations].name);
        }
    }

  fclose (fp);
  LOG (llevDebug, "done. got (%d)\n", num_animations);
}

static int
anim_compare (const animation *a, const animation *b)
{
  return std::strcmp (a->name, b->name);
}

/* Tries to find the animation id that matches name.  Returns an integer match 
 * 0 if no match found (animation 0 is initialised as the 'bug' face
 */
int
find_animation (const char *name)
{
  animation search, *match;

  search.name = name;

  match = (animation *) bsearch (&search, &animations[0], (num_animations + 1),
                                  sizeof (animation), (int (*)(const void *, const void *)) anim_compare);


  if (match)
    return match->num;

  LOG (llevError, "Unable to find animation %s\n", name);

  return 0;
}

/*
 * animate_object(object) updates the face-variable of an object.
 * If the object is the head of a multi-object, all objects are animated.
 * op is the object to animate.
 * dir is the direction the object is facing.  This is generally same as
 *    op->direction, but in some cases, op->facing is used instead - the
 *    caller has a better idea which one it really wants to be using,
 *    so let it pass along the right one.
 */
void
animate_object (object *op, int dir)
{
  int max_state;                  /* Max animation state object should be drawn in */
  int base_state;                 /* starting index # to draw from */

  if (!op->animation_id || !NUM_ANIMATIONS (op))
    {
      LOG (llevError, "Object %s lacks animation.\n", op->debug_desc ());
      CLEAR_FLAG (op, FLAG_ANIMATE);
      return;
    }

  if (op->head)
    {
      dir = op->head->direction;

      if (NUM_ANIMATIONS (op) == NUM_ANIMATIONS (op->head))
        op->state = op->head->state;
      else
        ++op->state;
    }
  else
    ++op->state;              /* increase draw state */

  /* If object is turning, then max animation state is half through the
   * animations.  Otherwise, we can use all the animations.
   */
  max_state = NUM_ANIMATIONS (op) / NUM_FACINGS (op);
  base_state = 0;
  /* at least in the older animations that used is_turning, the first half
   * of the animations were left facing, the second half right facing.
   * Note in old the is_turning, it was set so that the animation for a monster
   * was always towards the enemy - now it is whatever direction the monster
   * is facing.
   */

  if (NUM_FACINGS (op) == 2)
    {
      if (dir < 5)
        base_state = 0;
      else
        base_state = NUM_ANIMATIONS (op) / 2;
    }
  else if (NUM_FACINGS (op) == 4)
    {
      if (dir == 0)
        base_state = 0;
      else
        base_state = ((dir - 1) / 2) * (NUM_ANIMATIONS (op) / 4);
    }
  else if (NUM_FACINGS (op) == 8)
    {
      if (dir == 0)
        base_state = 0;
      else
        base_state = (dir - 1) * (NUM_ANIMATIONS (op) / 8);
    }

  /* If beyond drawable states, reset */
  if (op->state >= max_state)
    op->state = 0;

  SET_ANIMATION (op, op->state + base_state);

  if (op->face == blank_face)
    op->invisible = 1;
  /* This block covers monsters (eg, pixies) which are supposed to
   * cycle from visible to invisible and back to being visible.
   * as such, disable it for players, as then players would become
   * visible.
   */
  else if (op->type != PLAYER && op->arch->clone.flag [FLAG_ALIVE])
    {
      if (op->face->number == 0)
        {
          op->invisible = 1;
          CLEAR_FLAG (op, FLAG_ALIVE);
        }
      else
        {
          op->invisible = 0;
          SET_FLAG (op, FLAG_ALIVE);
        }
    }

  if (op->more)
    animate_object (op->more, dir);

  /* update_object will also recursively update all the pieces.
   * as such, we call it last, and only call it for the head
   * piece, and not for the other tail pieces.
   */
  if (!op->head)
    update_object (op, UP_OBJ_FACE);
}
Revision:	1.20
Committed:	Fri Feb 9 01:52:09 2007 UTC (17 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_0
Changes since 1.19:	+10 -3 lines
Log Message:	minor stuff, indent
#	Content
1	/*
2	* CrossFire, A Multiplayer game for X-windows
3	*
4	* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
5	* Copyright (C) 2002-2003 Mark Wedel & Crossfire Development Team
6	* Copyright (C) 1992 Frank Tore Johansen
7	*
8	* This program is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License as published by
10	* the Free Software Foundation; either version 2 of the License, or
11	* (at your option) any later version.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21	*
22	* The authors can be reached via e-mail at <crossfire@schmorp.de>
23	*/
24
25	/* This file contains animation related code. */
26
27	#include <global.h>
28	#include <stdio.h>
29
30	void
31	free_all_anim (void)
32	{
33	for (int i = 0; i <= num_animations; i++)
34	{
35	animations[i].name = 0;
36	free (animations[i].faces);
37	}
38
39	animations.clear ();
40	}
41
42	void
43	init_anim (void)
44	{
45	char
46	buf[MAX_BUF];
47	FILE *
48	fp;
49	static int
50	anim_init = 0;
51	int
52	num_frames = 0, faces[MAX_ANIMATIONS], i;
53
54	if (anim_init)
55	return;
56
57	num_animations = 0;
58	/* Make a default. New animations start at one, so if something
59	* thinks it is animated but hasn't set the animation_id properly,
60	* it will have a default value that should be pretty obvious.
61	*/
62	/* set the name so we don't try to dereferance null.
63	* Put # at start so it will be first in alphabetical
64	* order.
65	*/
66	{
67	animation anim0;
68
69	anim0.name = "###none";
70	anim0.num_animations = 1;
71	anim0.faces = (uint16 *)malloc (sizeof (uint16));
72	anim0.faces[0] = 0;
73	anim0.facings = 0;
74
75	animations.push_back (anim0);
76	}
77
78	sprintf (buf, "%s/animations", settings.datadir);
79	LOG (llevDebug, "Reading animations from %s...\n", buf);
80
81	if ((fp = fopen (buf, "r")) == NULL)
82	{
83	LOG (llevError, "Cannot open animations file %s: %s\n", buf, strerror (errno));
84	exit (-1);
85	}
86
87	while (fgets (buf, MAX_BUF - 1, fp) != NULL)
88	{
89	if (*buf == '#')
90	continue;
91
92	/* Kill the newline */
93	buf[strlen (buf) - 1] = '\0';
94	if (!strncmp (buf, "anim ", 5))
95	{
96	if (num_frames)
97	{
98	LOG (llevError, "Didn't get a mina before %s\n", buf);
99	num_frames = 0;
100	}
101
102	num_animations++;
103
104	animation anim;
105
106	anim.name = buf + 5;
107	anim.num = num_animations; /* for bsearch */
108	anim.facings = 1;
109	animations.push_back (anim);
110	}
111	else if (!strncmp (buf, "mina", 4))
112	{
113	animations[num_animations].faces = (uint16 ) malloc (sizeof (uint16) num_frames);
114
115	for (i = 0; i < num_frames; i++)
116	animations[num_animations].faces[i] = faces[i];
117
118	animations[num_animations].num_animations = num_frames;
119	if (num_frames % animations[num_animations].facings)
120	{
121	LOG (llevDebug, "Animation %s frame numbers (%d) is not a multiple of facings (%d)\n",
122	&animations[num_animations].name, num_frames, animations[num_animations].facings);
123	}
124	num_frames = 0;
125	}
126	else if (!strncmp (buf, "facings", 7))
127	{
128	if (!(animations[num_animations].facings = atoi (buf + 7)))
129	{
130	LOG (llevDebug, "Animation %s has 0 facings, line=%s\n", &animations[num_animations].name, buf);
131	animations[num_animations].facings = 1;
132	}
133
134	}
135	else
136	{
137	if (!(faces[num_frames++] = FindFace (buf, 0)))
138	LOG (llevDebug, "Could not find face %s for animation %s\n", buf, &animations[num_animations].name);
139	}
140	}
141
142	fclose (fp);
143	LOG (llevDebug, "done. got (%d)\n", num_animations);
144	}
145
146	static int
147	anim_compare (const animation a, const animation b)
148	{
149	return std::strcmp (a->name, b->name);
150	}
151
152	/* Tries to find the animation id that matches name. Returns an integer match
153	* 0 if no match found (animation 0 is initialised as the 'bug' face
154	*/
155	int
156	find_animation (const char *name)
157	{
158	animation search, *match;
159
160	search.name = name;
161
162	match = (animation *) bsearch (&search, &animations[0], (num_animations + 1),
163	sizeof (animation), (int ()(const void , const void *)) anim_compare);
164
165
166	if (match)
167	return match->num;
168
169	LOG (llevError, "Unable to find animation %s\n", name);
170
171	return 0;
172	}
173
174	/*
175	* animate_object(object) updates the face-variable of an object.
176	* If the object is the head of a multi-object, all objects are animated.
177	* op is the object to animate.
178	* dir is the direction the object is facing. This is generally same as
179	* op->direction, but in some cases, op->facing is used instead - the
180	* caller has a better idea which one it really wants to be using,
181	* so let it pass along the right one.
182	*/
183	void
184	animate_object (object *op, int dir)
185	{
186	int max_state; /* Max animation state object should be drawn in */
187	int base_state; /* starting index # to draw from */
188
189	if (!op->animation_id \|\| !NUM_ANIMATIONS (op))
190	{
191	LOG (llevError, "Object %s lacks animation.\n", op->debug_desc ());
192	CLEAR_FLAG (op, FLAG_ANIMATE);
193	return;
194	}
195
196	if (op->head)
197	{
198	dir = op->head->direction;
199
200	if (NUM_ANIMATIONS (op) == NUM_ANIMATIONS (op->head))
201	op->state = op->head->state;
202	else
203	++op->state;
204	}
205	else
206	++op->state; /* increase draw state */
207
208	/* If object is turning, then max animation state is half through the
209	* animations. Otherwise, we can use all the animations.
210	*/
211	max_state = NUM_ANIMATIONS (op) / NUM_FACINGS (op);
212	base_state = 0;
213	/* at least in the older animations that used is_turning, the first half
214	* of the animations were left facing, the second half right facing.
215	* Note in old the is_turning, it was set so that the animation for a monster
216	* was always towards the enemy - now it is whatever direction the monster
217	* is facing.
218	*/
219
220	if (NUM_FACINGS (op) == 2)
221	{
222	if (dir < 5)
223	base_state = 0;
224	else
225	base_state = NUM_ANIMATIONS (op) / 2;
226	}
227	else if (NUM_FACINGS (op) == 4)
228	{
229	if (dir == 0)
230	base_state = 0;
231	else
232	base_state = ((dir - 1) / 2) * (NUM_ANIMATIONS (op) / 4);
233	}
234	else if (NUM_FACINGS (op) == 8)
235	{
236	if (dir == 0)
237	base_state = 0;
238	else
239	base_state = (dir - 1) * (NUM_ANIMATIONS (op) / 8);
240	}
241
242	/* If beyond drawable states, reset */
243	if (op->state >= max_state)
244	op->state = 0;
245
246	SET_ANIMATION (op, op->state + base_state);
247
248	if (op->face == blank_face)
249	op->invisible = 1;
250	/* This block covers monsters (eg, pixies) which are supposed to
251	* cycle from visible to invisible and back to being visible.
252	* as such, disable it for players, as then players would become
253	* visible.
254	*/
255	else if (op->type != PLAYER && op->arch->clone.flag [FLAG_ALIVE])
256	{
257	if (op->face->number == 0)
258	{
259	op->invisible = 1;
260	CLEAR_FLAG (op, FLAG_ALIVE);
261	}
262	else
263	{
264	op->invisible = 0;
265	SET_FLAG (op, FLAG_ALIVE);
266	}
267	}
268
269	if (op->more)
270	animate_object (op->more, dir);
271
272	/* update_object will also recursively update all the pieces.
273	* as such, we call it last, and only call it for the head
274	* piece, and not for the other tail pieces.
275	*/
276	if (!op->head)
277	update_object (op, UP_OBJ_FACE);
278	}