server/common/anim.c

/*
 * static char *rcsid_anim_c =
 *   "$Id: anim.c,v 1.20 2005/12/05 23:34:03 akirschbaum Exp $";
 */

/*
    CrossFire, A Multiplayer game for X-windows

    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-devel@real-time.com
*/

/* This file contains animation related code. */

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

void free_all_anim(void) {
    int i;

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

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;
    animations_allocated=9;
    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.
     */
    animations = malloc(10*sizeof(Animations));
    /* set the name so we don't try to dereferance null.
     * Put # at start so it will be first in alphabetical
     * order.
     */
    animations[0].name=add_string("###none");
    animations[0].num_animations=1;
    animations[0].faces = malloc(sizeof(Fontindex));
    animations[0].faces[0]=0;
    animations[0].facings=0;

    sprintf(buf,"%s/animations", settings.datadir);
    LOG(llevDebug,"Reading animations from %s...", buf);
    if ((fp=fopen(buf,"r")) ==NULL) {
        LOG(llevError, "Cannot open animations file %s: %s\n", buf, strerror_local(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++;
            if (num_animations==animations_allocated) {
                animations=realloc(animations, sizeof(Animations)*(animations_allocated+10));
                animations_allocated+=10;
                }
            animations[num_animations].name = add_string(buf+5);
            animations[num_animations].num = num_animations;    /* for bsearch */
            animations[num_animations].facings = 1;
        }
        else if (!strncmp(buf,"mina",4)) {
            animations[num_animations].faces = malloc(sizeof(Fontindex)*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(Animations *a, Animations *b) {
    return 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 initialized as the 'bug' face
 */
int find_animation(const char *name)
{
    Animations search, *match;

    search.name = name;

    match = (Animations*)bsearch(&search, animations, (num_animations+1), 
                sizeof(Animations), (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 lacks animation.\n");
        dump_object(op);
        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 aniamtions 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 && QUERY_FLAG((&op->arch->clone),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:	1.1
Committed:	Fri Feb 3 07:11:29 2006 UTC (20 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Branch point for:	UPSTREAM
Log Message:	Initial revision
#	User	Rev	Content
1	root	1.1	/*
2			* static char *rcsid_anim_c =
3			* "$Id: anim.c,v 1.20 2005/12/05 23:34:03 akirschbaum Exp $";
4			*/
5
6			/*
7			CrossFire, A Multiplayer game for X-windows
8
9			Copyright (C) 2002-2003 Mark Wedel & Crossfire Development Team
10			Copyright (C) 1992 Frank Tore Johansen
11
12			This program is free software; you can redistribute it and/or modify
13			it under the terms of the GNU General Public License as published by
14			the Free Software Foundation; either version 2 of the License, or
15			(at your option) any later version.
16
17			This program is distributed in the hope that it will be useful,
18			but WITHOUT ANY WARRANTY; without even the implied warranty of
19			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20			GNU General Public License for more details.
21
22			You should have received a copy of the GNU General Public License
23			along with this program; if not, write to the Free Software
24			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26			The authors can be reached via e-mail at crossfire-devel@real-time.com
27			*/
28
29			/* This file contains animation related code. */
30
31			#include <global.h>
32			#include <stdio.h>
33
34			void free_all_anim(void) {
35			int i;
36
37			for (i=0; i<=num_animations; i++) {
38			free_string(animations[i].name);
39			free(animations[i].faces);
40			}
41			free(animations);
42			}
43
44			void init_anim(void) {
45			char buf[MAX_BUF];
46			FILE *fp;
47			static int anim_init=0;
48			int num_frames=0,faces[MAX_ANIMATIONS],i;
49
50			if (anim_init) return;
51			animations_allocated=9;
52			num_animations=0;
53			/* Make a default. New animations start at one, so if something
54			* thinks it is animated but hasn't set the animation_id properly,
55			* it will have a default value that should be pretty obvious.
56			*/
57			animations = malloc(10*sizeof(Animations));
58			/* set the name so we don't try to dereferance null.
59			* Put # at start so it will be first in alphabetical
60			* order.
61			*/
62			animations[0].name=add_string("###none");
63			animations[0].num_animations=1;
64			animations[0].faces = malloc(sizeof(Fontindex));
65			animations[0].faces[0]=0;
66			animations[0].facings=0;
67
68			sprintf(buf,"%s/animations", settings.datadir);
69			LOG(llevDebug,"Reading animations from %s...", buf);
70			if ((fp=fopen(buf,"r")) ==NULL) {
71			LOG(llevError, "Cannot open animations file %s: %s\n", buf, strerror_local(errno));
72			exit(-1);
73			}
74			while (fgets(buf, MAX_BUF-1, fp)!=NULL) {
75			if (*buf=='#') continue;
76			/* Kill the newline */
77			buf[strlen(buf)-1] = '\0';
78			if (!strncmp(buf,"anim ", 5)) {
79			if (num_frames) {
80			LOG(llevError,"Didn't get a mina before %s\n", buf);
81			num_frames=0;
82			}
83			num_animations++;
84			if (num_animations==animations_allocated) {
85			animations=realloc(animations, sizeof(Animations)*(animations_allocated+10));
86			animations_allocated+=10;
87			}
88			animations[num_animations].name = add_string(buf+5);
89			animations[num_animations].num = num_animations; /* for bsearch */
90			animations[num_animations].facings = 1;
91			}
92			else if (!strncmp(buf,"mina",4)) {
93			animations[num_animations].faces = malloc(sizeof(Fontindex)*num_frames);
94			for (i=0; i<num_frames; i++)
95			animations[num_animations].faces[i]=faces[i];
96			animations[num_animations].num_animations = num_frames;
97			if (num_frames % animations[num_animations].facings) {
98			LOG(llevDebug,"Animation %s frame numbers (%d) is not a multiple of facings (%d)\n",
99			animations[num_animations].name, num_frames, animations[num_animations].facings);
100			}
101			num_frames=0;
102			}
103			else if (!strncmp(buf,"facings",7)) {
104			if (!(animations[num_animations].facings = atoi(buf+7))) {
105			LOG(llevDebug,"Animation %s has 0 facings, line=%s\n",
106			animations[num_animations].name, buf);
107			animations[num_animations].facings=1;
108			}
109
110			} else {
111			if (!(faces[num_frames++] = FindFace(buf,0)))
112			LOG(llevDebug,"Could not find face %s for animation %s\n",
113			buf, animations[num_animations].name);
114			}
115			}
116			fclose(fp);
117			LOG(llevDebug,"done. got (%d)\n", num_animations);
118			}
119
120			static int anim_compare(Animations a, Animations b) {
121			return strcmp(a->name, b->name);
122			}
123
124			/* Tries to find the animation id that matches name. Returns an integer match
125			* 0 if no match found (animation 0 is initialized as the 'bug' face
126			*/
127			int find_animation(const char *name)
128			{
129			Animations search, *match;
130
131			search.name = name;
132
133			match = (Animations*)bsearch(&search, animations, (num_animations+1),
134			sizeof(Animations), (int ()(const void, const void*))anim_compare);
135
136
137			if (match) return match->num;
138			LOG(llevError,"Unable to find animation %s\n", name);
139			return 0;
140			}
141
142			/*
143			* animate_object(object) updates the face-variable of an object.
144			* If the object is the head of a multi-object, all objects are animated.
145			* op is the object to animate.
146			* dir is the direction the object is facing. This is generally same as
147			* op->direction, but in some cases, op->facing is used instead - the
148			* caller has a better idea which one it really wants to be using,
149			* so let it pass along the right one.
150			*/
151
152			void animate_object(object *op, int dir) {
153			int max_state; /* Max animation state object should be drawn in */
154			int base_state; /* starting index # to draw from */
155
156			if(!op->animation_id \|\| !NUM_ANIMATIONS(op)) {
157			LOG(llevError,"Object lacks animation.\n");
158			dump_object(op);
159			return;
160			}
161			if (op->head) {
162			dir=op->head->direction;
163
164			if (NUM_ANIMATIONS(op) == NUM_ANIMATIONS(op->head))
165			op->state = op->head->state;
166			else
167			++op->state;
168			}
169			else {
170			++op->state; /* increase draw state */
171			}
172
173			/* If object is turning, then max animation state is half through the
174			* animations. Otherwise, we can use all the animations.
175			*/
176			max_state=NUM_ANIMATIONS(op)/ NUM_FACINGS(op);
177			base_state=0;
178			/* at least in the older aniamtions that used is_turning, the first half
179			* of the animations were left facing, the second half right facing.
180			* Note in old the is_turning, it was set so that the animation for a monster
181			* was always towards the enemy - now it is whatever direction the monster
182			* is facing.
183			*/
184			if (NUM_FACINGS(op)==2) {
185			if (dir<5) base_state=0;
186			else base_state=NUM_ANIMATIONS(op)/2;
187			}
188			else if (NUM_FACINGS(op)==4) {
189			if (dir==0) base_state=0;
190			else base_state = ((dir-1)/2) * (NUM_ANIMATIONS(op)/4);
191			}
192			else if (NUM_FACINGS(op)==8) {
193			if (dir==0) base_state=0;
194			else base_state = (dir-1)*(NUM_ANIMATIONS(op)/8);
195			}
196
197			/* If beyond drawable states, reset */
198			if (op->state>=max_state) op->state=0;
199
200			SET_ANIMATION(op, op->state + base_state);
201
202			if(op->face==blank_face)
203			op->invisible=1;
204
205			/* This block covers monsters (eg, pixies) which are supposed to
206			* cycle from visible to invisible and back to being visible.
207			* as such, disable it for players, as then players would become
208			* visible.
209			*/
210			else if(op->type != PLAYER && QUERY_FLAG((&op->arch->clone),FLAG_ALIVE)) {
211			if(op->face->number==0) {
212			op->invisible=1;
213			CLEAR_FLAG(op, FLAG_ALIVE);
214			} else {
215			op->invisible=0;
216			SET_FLAG(op, FLAG_ALIVE);
217			}
218			}
219
220			if(op->more)
221			animate_object(op->more, dir);
222
223			/* update_object will also recursively update all the pieces.
224			* as such, we call it last, and only call it for the head
225			* piece, and not for the other tail pieces.
226			*/
227			if (!op->head)
228			update_object(op, UP_OBJ_FACE);
229			}
230