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
#	User	Rev	Content
1	elmex	1.1	/*
2	pippijn	1.17	* 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	elmex	1.1
25			/* This file contains animation related code. */
26
27			#include <global.h>
28			#include <stdio.h>
29
30	root	1.7	void
31			free_all_anim (void)
32	root	1.4	{
33	root	1.7	for (int i = 0; i <= num_animations; i++)
34	root	1.4	{
35			animations[i].name = 0;
36			free (animations[i].faces);
37	elmex	1.1	}
38	root	1.4
39			animations.clear ();
40	elmex	1.1	}
41
42	root	1.7	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	root	1.20
57	root	1.7	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	root	1.18	animation anim0;
68	root	1.7
69			anim0.name = "###none";
70			anim0.num_animations = 1;
71	root	1.11	anim0.faces = (uint16 *)malloc (sizeof (uint16));
72	root	1.7	anim0.faces[0] = 0;
73			anim0.facings = 0;
74
75			animations.push_back (anim0);
76			}
77
78			sprintf (buf, "%s/animations", settings.datadir);
79	pippijn	1.13	LOG (llevDebug, "Reading animations from %s...\n", buf);
80	root	1.20
81	root	1.7	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	root	1.20
87	root	1.7	while (fgets (buf, MAX_BUF - 1, fp) != NULL)
88			{
89			if (*buf == '#')
90			continue;
91	root	1.20
92	root	1.7	/* 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	root	1.2	}
101	root	1.20
102	root	1.7	num_animations++;
103
104	root	1.18	animation anim;
105	root	1.4
106	root	1.7	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	root	1.11	animations[num_animations].faces = (uint16 ) malloc (sizeof (uint16) num_frames);
114	root	1.20
115	root	1.7	for (i = 0; i < num_frames; i++)
116			animations[num_animations].faces[i] = faces[i];
117	root	1.20
118	root	1.7	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	root	1.2	}
124	root	1.7	num_frames = 0;
125	root	1.2	}
126	root	1.7	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	root	1.2	}
133
134	root	1.7	}
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	root	1.2	}
140	elmex	1.1	}
141	root	1.20
142	root	1.7	fclose (fp);
143			LOG (llevDebug, "done. got (%d)\n", num_animations);
144	elmex	1.1	}
145
146	root	1.7	static int
147	root	1.19	anim_compare (const animation a, const animation b)
148	root	1.7	{
149	root	1.19	return std::strcmp (a->name, b->name);
150	elmex	1.1	}
151
152			/* Tries to find the animation id that matches name. Returns an integer match
153	pippijn	1.14	* 0 if no match found (animation 0 is initialised as the 'bug' face
154	elmex	1.1	*/
155	root	1.7	int
156			find_animation (const char *name)
157	elmex	1.1	{
158	root	1.18	animation search, *match;
159	elmex	1.1
160	root	1.7	search.name = name;
161	elmex	1.1
162	root	1.18	match = (animation *) bsearch (&search, &animations[0], (num_animations + 1),
163			sizeof (animation), (int ()(const void , const void *)) anim_compare);
164	elmex	1.1
165
166	root	1.7	if (match)
167			return match->num;
168	root	1.16
169	root	1.7	LOG (llevError, "Unable to find animation %s\n", name);
170	root	1.16
171	root	1.7	return 0;
172	elmex	1.1	}
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	root	1.7	void
184			animate_object (object *op, int dir)
185			{
186	root	1.12	int max_state; /* Max animation state object should be drawn in */
187			int base_state; /* starting index # to draw from */
188	root	1.7
189			if (!op->animation_id \|\| !NUM_ANIMATIONS (op))
190			{
191	root	1.9	LOG (llevError, "Object %s lacks animation.\n", op->debug_desc ());
192	root	1.16	CLEAR_FLAG (op, FLAG_ANIMATE);
193	root	1.7	return;
194			}
195	root	1.9
196	root	1.7	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	root	1.9	++op->state; /* increase draw state */
207	root	1.7
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	root	1.20	/* at least in the older animations that used is_turning, the first half
214	root	1.7	* 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	root	1.9
220	root	1.7	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	root	1.20	else if (op->type != PLAYER && op->arch->clone.flag [FLAG_ALIVE])
256	root	1.7	{
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	elmex	1.1	}