src/common/readmesh.c

#ifndef lint
static const char RCSid[] = "$Id: readmesh.c,v 2.12 2004/04/29 14:36:49 greg Exp $";
#endif
/*
 *  Routines for reading a compiled mesh from a file
 */

#include  <time.h>

#include  "platform.h"
#include  "standard.h"
#include  "octree.h"
#include  "object.h"
#include  "mesh.h"
#include  "resolu.h"

#ifdef getc_unlocked            /* avoid horrendous overhead of flockfile */
#undef getc
#define getc    getc_unlocked
#endif

static char     *meshfn;        /* input file name */
static FILE     *meshfp;        /* mesh file pointer */
static int      objsize;        /* sizeof(OBJECT) from writer */


static void
mesherror(etyp, msg)                    /* mesh read error */
int  etyp;
char  *msg;
{
        char  msgbuf[128];

        sprintf(msgbuf, "(%s): %s", meshfn, msg);
        error(etyp, msgbuf);
}


static long
mgetint(siz)                            /* get a siz-byte integer */
int  siz;
{
        register long  r;

        r = getint(siz, meshfp);
        if (feof(meshfp))
                mesherror(USER, "truncated mesh file");
        return(r);
}


static double
mgetflt()                               /* get a floating point number */
{
        double  r;

        r = getflt(meshfp);
        if (feof(meshfp))
                mesherror(USER, "truncated mesh file");
        return(r);
}
        

static OCTREE
getfullnode()                           /* get a set, return fullnode */
{
        OBJECT  set[MAXSET+1];
        register int  i;

        if ((set[0] = mgetint(objsize)) > MAXSET)
                mesherror(USER, "bad set in getfullnode");
        for (i = 1; i <= set[0]; i++)
                set[i] = mgetint(objsize);
        return(fullnode(set));
}       


static OCTREE
gettree()                               /* get a pre-ordered octree */
{
        register OCTREE  ot;
        register int  i;
        
        switch (getc(meshfp)) {
                case OT_EMPTY:
                        return(EMPTY);
                case OT_FULL:
                        return(getfullnode());
                case OT_TREE:
                        if ((ot = octalloc()) == EMPTY)
                                mesherror(SYSTEM, "out of tree space in readmesh");
                        for (i = 0; i < 8; i++)
                                octkid(ot, i) = gettree();
                        return(ot);
                case EOF:
                        mesherror(USER, "truncated mesh octree");
                default:
                        mesherror(USER, "damaged mesh octree");
        }
        return (OCTREE)NULL; /* pro forma return */
}


static void
skiptree()                              /* skip octree on input */
{
        register int  i;
        
        switch (getc(meshfp)) {
        case OT_EMPTY:
                return;
        case OT_FULL:
                for (i = mgetint(objsize)*objsize; i-- > 0; )
                        if (getc(meshfp) == EOF)
                                mesherror(USER, "truncated mesh octree");
                return;
        case OT_TREE:
                for (i = 0; i < 8; i++)
                        skiptree();
                return;
        case EOF:
                mesherror(USER, "truncated mesh octree");
        default:
                mesherror(USER, "damaged mesh octree");
        }
}


static void
getpatch(pp)                            /* load a mesh patch */
register MESHPATCH      *pp;
{
        int     flags;
        int     i, j;
                                        /* vertex flags */
        flags = mgetint(1);
        if (!(flags & MT_V) || flags & ~(MT_V|MT_N|MT_UV))
                mesherror(USER, "bad patch flags");
                                        /* allocate vertices */
        pp->nverts = mgetint(2);
        if (pp->nverts <= 0 || pp->nverts > 256)
                mesherror(USER, "bad number of patch vertices");
        pp->xyz = (uint32 (*)[3])malloc(pp->nverts*3*sizeof(uint32));
        if (pp->xyz == NULL)
                goto nomem;
        if (flags & MT_N) {
                pp->norm = (int32 *)calloc(pp->nverts, sizeof(int32));
                if (pp->norm == NULL)
                        goto nomem;
        } else
                pp->norm = NULL;
        if (flags & MT_UV) {
                pp->uv = (uint32 (*)[2])calloc(pp->nverts, 2*sizeof(uint32));
                if (pp->uv == NULL)
                        goto nomem;
        } else
                pp->uv = NULL;
                                        /* vertex xyz locations */
        for (i = 0; i < pp->nverts; i++)
                for (j = 0; j < 3; j++)
                        pp->xyz[i][j] = mgetint(4);
                                        /* vertex normals */
        if (flags & MT_N)
                for (i = 0; i < pp->nverts; i++)
                        pp->norm[i] = mgetint(4);
                                        /* uv coordinates */
        if (flags & MT_UV)
                for (i = 0; i < pp->nverts; i++)
                        for (j = 0; j < 2; j++)
                                pp->uv[i][j] = mgetint(4);
                                        /* local triangles */
        pp->ntris = mgetint(2);
        if (pp->ntris < 0 || pp->ntris > 512)
                mesherror(USER, "bad number of local triangles");
        if (pp->ntris) {
                pp->tri = (struct PTri *)malloc(pp->ntris *
                                                sizeof(struct PTri));
                if (pp->tri == NULL)
                        goto nomem;
                for (i = 0; i < pp->ntris; i++) {
                        pp->tri[i].v1 = mgetint(1);
                        pp->tri[i].v2 = mgetint(1);
                        pp->tri[i].v3 = mgetint(1);
                }
        } else
                pp->tri = NULL;
                                        /* local triangle material(s) */
        if (mgetint(2) > 1) {
                pp->trimat = (int16 *)malloc(pp->ntris*sizeof(int16));
                if (pp->trimat == NULL)
                        goto nomem;
                for (i = 0; i < pp->ntris; i++)
                        pp->trimat[i] = mgetint(2);
        } else {
                pp->solemat = mgetint(2);
                pp->trimat = NULL;
        }
                                        /* joiner triangles */
        pp->nj1tris = mgetint(2);
        if (pp->nj1tris < 0 || pp->nj1tris > 512)
                mesherror(USER, "bad number of joiner triangles");
        if (pp->nj1tris) {
                pp->j1tri = (struct PJoin1 *)malloc(pp->nj1tris *
                                                sizeof(struct PJoin1));
                if (pp->j1tri == NULL)
                        goto nomem;
                for (i = 0; i < pp->nj1tris; i++) {
                        pp->j1tri[i].v1j = mgetint(4);
                        pp->j1tri[i].v2 = mgetint(1);
                        pp->j1tri[i].v3 = mgetint(1);
                        pp->j1tri[i].mat = mgetint(2);
                }
        } else
                pp->j1tri = NULL;
                                        /* double joiner triangles */
        pp->nj2tris = mgetint(2);
        if (pp->nj2tris < 0 || pp->nj2tris > 256)
                mesherror(USER, "bad number of double joiner triangles");
        if (pp->nj2tris) {
                pp->j2tri = (struct PJoin2 *)malloc(pp->nj2tris *
                                                sizeof(struct PJoin2));
                if (pp->j2tri == NULL)
                        goto nomem;
                for (i = 0; i < pp->nj2tris; i++) {
                        pp->j2tri[i].v1j = mgetint(4);
                        pp->j2tri[i].v2j = mgetint(4);
                        pp->j2tri[i].v3 = mgetint(1);
                        pp->j2tri[i].mat = mgetint(2);
                }
        } else
                pp->j2tri = NULL;
        return;
nomem:
        error(SYSTEM, "out of mesh memory in getpatch");
}


void
readmesh(mp, path, flags)               /* read in mesh structures */
MESH    *mp;
char    *path;
int     flags;
{
        char    *err;
        char    sbuf[64];
        int     i;
                                        /* check what's loaded */
        flags &= (IO_INFO|IO_BOUNDS|IO_TREE|IO_SCENE) & ~mp->ldflags;
                                        /* open input file */
        if (path == NULL) {
                meshfn = "standard input";
                meshfp = stdin;
        } else if ((meshfp = fopen(meshfn=path, "r")) == NULL) {
                sprintf(errmsg, "cannot open mesh file \"%s\"", path);
                error(SYSTEM, errmsg);
        }
        SET_FILE_BINARY(meshfp);
                                        /* read header */
        checkheader(meshfp, MESHFMT, flags&IO_INFO ? stdout : (FILE *)NULL);
                                        /* read format number */
        objsize = getint(2, meshfp) - MESHMAGIC;
        if (objsize <= 0 || objsize > MAXOBJSIZ || objsize > sizeof(long))
                mesherror(USER, "incompatible mesh format");
                                        /* read boundaries */
        if (flags & IO_BOUNDS) {
                for (i = 0; i < 3; i++)
                        mp->mcube.cuorg[i] = atof(getstr(sbuf, meshfp));
                mp->mcube.cusize = atof(getstr(sbuf, meshfp));
                for (i = 0; i < 2; i++) {
                        mp->uvlim[0][i] = mgetflt();
                        mp->uvlim[1][i] = mgetflt();
                }
        } else {
                for (i = 0; i < 4; i++)
                        getstr(sbuf, meshfp);
                for (i = 0; i < 4; i++)
                        mgetflt();
        }
                                        /* read the octree */
        if (flags & IO_TREE)
                mp->mcube.cutree = gettree();
        else if (flags & IO_SCENE)
                skiptree();
                                        /* read materials and patches */
        if (flags & IO_SCENE) {
                mp->mat0 = nobjects;
                readscene(meshfp, objsize);
                mp->nmats = nobjects - mp->mat0;
                mp->npatches = mgetint(4);
                mp->patch = (MESHPATCH *)calloc(mp->npatches,
                                        sizeof(MESHPATCH));
                if (mp->patch == NULL)
                        mesherror(SYSTEM, "out of patch memory");
                for (i = 0; i < mp->npatches; i++)
                        getpatch(&mp->patch[i]);
        }
                                        /* clean up */
        fclose(meshfp);
        mp->ldflags |= flags;
                                        /* verify data */
        if ((err = checkmesh(mp)) != NULL)
                mesherror(USER, err);
}
Revision:	2.13
Committed:	Tue Sep 14 02:53:50 2004 UTC (19 years, 7 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R7P2, rad3R7P1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9
Changes since 2.12:	+2 -1 lines
Log Message:	Added #undef for getc/putc where they were being replaced
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.13	static const char RCSid[] = "$Id: readmesh.c,v 2.12 2004/04/29 14:36:49 greg Exp $";
3	greg	2.1	#endif
4			/*
5			* Routines for reading a compiled mesh from a file
6			*/
7	greg	2.7
8			#include <time.h>
9	greg	2.1
10	greg	2.10	#include "platform.h"
11	greg	2.1	#include "standard.h"
12			#include "octree.h"
13			#include "object.h"
14			#include "mesh.h"
15	schorsch	2.4	#include "resolu.h"
16	greg	2.1
17	greg	2.12	#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */
18	greg	2.13	#undef getc
19	greg	2.12	#define getc getc_unlocked
20			#endif
21
22	greg	2.1	static char meshfn; / input file name */
23			static FILE meshfp; / mesh file pointer */
24			static int objsize; /* sizeof(OBJECT) from writer */
25
26
27			static void
28			mesherror(etyp, msg) /* mesh read error */
29			int etyp;
30			char *msg;
31			{
32			char msgbuf[128];
33
34			sprintf(msgbuf, "(%s): %s", meshfn, msg);
35			error(etyp, msgbuf);
36			}
37
38
39			static long
40			mgetint(siz) /* get a siz-byte integer */
41			int siz;
42			{
43			register long r;
44
45			r = getint(siz, meshfp);
46			if (feof(meshfp))
47			mesherror(USER, "truncated mesh file");
48			return(r);
49			}
50
51
52			static double
53			mgetflt() /* get a floating point number */
54			{
55			double r;
56
57			r = getflt(meshfp);
58			if (feof(meshfp))
59			mesherror(USER, "truncated mesh file");
60			return(r);
61			}
62
63
64			static OCTREE
65			getfullnode() /* get a set, return fullnode */
66			{
67			OBJECT set[MAXSET+1];
68			register int i;
69
70			if ((set[0] = mgetint(objsize)) > MAXSET)
71			mesherror(USER, "bad set in getfullnode");
72			for (i = 1; i <= set[0]; i++)
73			set[i] = mgetint(objsize);
74			return(fullnode(set));
75			}
76
77
78			static OCTREE
79			gettree() /* get a pre-ordered octree */
80			{
81			register OCTREE ot;
82			register int i;
83
84			switch (getc(meshfp)) {
85	schorsch	2.4	case OT_EMPTY:
86			return(EMPTY);
87			case OT_FULL:
88			return(getfullnode());
89			case OT_TREE:
90			if ((ot = octalloc()) == EMPTY)
91			mesherror(SYSTEM, "out of tree space in readmesh");
92			for (i = 0; i < 8; i++)
93			octkid(ot, i) = gettree();
94			return(ot);
95			case EOF:
96			mesherror(USER, "truncated mesh octree");
97			default:
98			mesherror(USER, "damaged mesh octree");
99	greg	2.1	}
100	schorsch	2.8	return (OCTREE)NULL; /* pro forma return */
101	greg	2.1	}
102
103
104			static void
105			skiptree() /* skip octree on input */
106			{
107			register int i;
108
109			switch (getc(meshfp)) {
110			case OT_EMPTY:
111			return;
112			case OT_FULL:
113			for (i = mgetint(objsize)*objsize; i-- > 0; )
114			if (getc(meshfp) == EOF)
115			mesherror(USER, "truncated mesh octree");
116			return;
117			case OT_TREE:
118			for (i = 0; i < 8; i++)
119			skiptree();
120			return;
121			case EOF:
122			mesherror(USER, "truncated mesh octree");
123			default:
124			mesherror(USER, "damaged mesh octree");
125			}
126			}
127
128
129			static void
130			getpatch(pp) /* load a mesh patch */
131			register MESHPATCH *pp;
132			{
133			int flags;
134			int i, j;
135			/* vertex flags */
136			flags = mgetint(1);
137			if (!(flags & MT_V) \|\| flags & ~(MT_V\|MT_N\|MT_UV))
138			mesherror(USER, "bad patch flags");
139			/* allocate vertices */
140			pp->nverts = mgetint(2);
141			if (pp->nverts <= 0 \|\| pp->nverts > 256)
142			mesherror(USER, "bad number of patch vertices");
143	greg	2.6	pp->xyz = (uint32 ()[3])malloc(pp->nverts3*sizeof(uint32));
144	greg	2.1	if (pp->xyz == NULL)
145			goto nomem;
146			if (flags & MT_N) {
147	greg	2.6	pp->norm = (int32 *)calloc(pp->nverts, sizeof(int32));
148	greg	2.1	if (pp->norm == NULL)
149			goto nomem;
150			} else
151			pp->norm = NULL;
152			if (flags & MT_UV) {
153	greg	2.11	pp->uv = (uint32 ()[2])calloc(pp->nverts, 2sizeof(uint32));
154	greg	2.1	if (pp->uv == NULL)
155			goto nomem;
156			} else
157			pp->uv = NULL;
158			/* vertex xyz locations */
159			for (i = 0; i < pp->nverts; i++)
160			for (j = 0; j < 3; j++)
161			pp->xyz[i][j] = mgetint(4);
162			/* vertex normals */
163			if (flags & MT_N)
164			for (i = 0; i < pp->nverts; i++)
165			pp->norm[i] = mgetint(4);
166			/* uv coordinates */
167			if (flags & MT_UV)
168			for (i = 0; i < pp->nverts; i++)
169			for (j = 0; j < 2; j++)
170	greg	2.11	pp->uv[i][j] = mgetint(4);
171	greg	2.1	/* local triangles */
172			pp->ntris = mgetint(2);
173			if (pp->ntris < 0 \|\| pp->ntris > 512)
174			mesherror(USER, "bad number of local triangles");
175			if (pp->ntris) {
176			pp->tri = (struct PTri )malloc(pp->ntris
177			sizeof(struct PTri));
178			if (pp->tri == NULL)
179			goto nomem;
180			for (i = 0; i < pp->ntris; i++) {
181			pp->tri[i].v1 = mgetint(1);
182			pp->tri[i].v2 = mgetint(1);
183			pp->tri[i].v3 = mgetint(1);
184			}
185			} else
186			pp->tri = NULL;
187	greg	2.2	/* local triangle material(s) */
188			if (mgetint(2) > 1) {
189	greg	2.6	pp->trimat = (int16 )malloc(pp->ntrissizeof(int16));
190	greg	2.2	if (pp->trimat == NULL)
191			goto nomem;
192			for (i = 0; i < pp->ntris; i++)
193			pp->trimat[i] = mgetint(2);
194			} else {
195			pp->solemat = mgetint(2);
196			pp->trimat = NULL;
197			}
198	greg	2.1	/* joiner triangles */
199			pp->nj1tris = mgetint(2);
200			if (pp->nj1tris < 0 \|\| pp->nj1tris > 512)
201			mesherror(USER, "bad number of joiner triangles");
202			if (pp->nj1tris) {
203			pp->j1tri = (struct PJoin1 )malloc(pp->nj1tris
204			sizeof(struct PJoin1));
205			if (pp->j1tri == NULL)
206			goto nomem;
207			for (i = 0; i < pp->nj1tris; i++) {
208			pp->j1tri[i].v1j = mgetint(4);
209			pp->j1tri[i].v2 = mgetint(1);
210			pp->j1tri[i].v3 = mgetint(1);
211	greg	2.2	pp->j1tri[i].mat = mgetint(2);
212	greg	2.1	}
213			} else
214			pp->j1tri = NULL;
215			/* double joiner triangles */
216			pp->nj2tris = mgetint(2);
217			if (pp->nj2tris < 0 \|\| pp->nj2tris > 256)
218			mesherror(USER, "bad number of double joiner triangles");
219			if (pp->nj2tris) {
220			pp->j2tri = (struct PJoin2 )malloc(pp->nj2tris
221			sizeof(struct PJoin2));
222			if (pp->j2tri == NULL)
223			goto nomem;
224			for (i = 0; i < pp->nj2tris; i++) {
225			pp->j2tri[i].v1j = mgetint(4);
226			pp->j2tri[i].v2j = mgetint(4);
227			pp->j2tri[i].v3 = mgetint(1);
228	greg	2.2	pp->j2tri[i].mat = mgetint(2);
229	greg	2.1	}
230			} else
231			pp->j2tri = NULL;
232			return;
233			nomem:
234			error(SYSTEM, "out of mesh memory in getpatch");
235			}
236
237
238			void
239			readmesh(mp, path, flags) /* read in mesh structures */
240			MESH *mp;
241			char *path;
242			int flags;
243			{
244	greg	2.2	char *err;
245	greg	2.1	char sbuf[64];
246			int i;
247			/* check what's loaded */
248			flags &= (IO_INFO\|IO_BOUNDS\|IO_TREE\|IO_SCENE) & ~mp->ldflags;
249			/* open input file */
250			if (path == NULL) {
251			meshfn = "standard input";
252			meshfp = stdin;
253			} else if ((meshfp = fopen(meshfn=path, "r")) == NULL) {
254			sprintf(errmsg, "cannot open mesh file \"%s\"", path);
255			error(SYSTEM, errmsg);
256			}
257	schorsch	2.3	SET_FILE_BINARY(meshfp);
258	greg	2.1	/* read header */
259			checkheader(meshfp, MESHFMT, flags&IO_INFO ? stdout : (FILE *)NULL);
260			/* read format number */
261			objsize = getint(2, meshfp) - MESHMAGIC;
262			if (objsize <= 0 \|\| objsize > MAXOBJSIZ \|\| objsize > sizeof(long))
263			mesherror(USER, "incompatible mesh format");
264			/* read boundaries */
265			if (flags & IO_BOUNDS) {
266			for (i = 0; i < 3; i++)
267			mp->mcube.cuorg[i] = atof(getstr(sbuf, meshfp));
268			mp->mcube.cusize = atof(getstr(sbuf, meshfp));
269			for (i = 0; i < 2; i++) {
270			mp->uvlim[0][i] = mgetflt();
271			mp->uvlim[1][i] = mgetflt();
272			}
273			} else {
274			for (i = 0; i < 4; i++)
275			getstr(sbuf, meshfp);
276			for (i = 0; i < 4; i++)
277			mgetflt();
278			}
279			/* read the octree */
280			if (flags & IO_TREE)
281			mp->mcube.cutree = gettree();
282			else if (flags & IO_SCENE)
283			skiptree();
284	greg	2.2	/* read materials and patches */
285	greg	2.1	if (flags & IO_SCENE) {
286	greg	2.2	mp->mat0 = nobjects;
287			readscene(meshfp, objsize);
288			mp->nmats = nobjects - mp->mat0;
289	greg	2.1	mp->npatches = mgetint(4);
290			mp->patch = (MESHPATCH *)calloc(mp->npatches,
291			sizeof(MESHPATCH));
292			if (mp->patch == NULL)
293			mesherror(SYSTEM, "out of patch memory");
294			for (i = 0; i < mp->npatches; i++)
295			getpatch(&mp->patch[i]);
296			}
297			/* clean up */
298			fclose(meshfp);
299			mp->ldflags \|= flags;
300	greg	2.2	/* verify data */
301			if ((err = checkmesh(mp)) != NULL)
302			mesherror(USER, err);
303	greg	2.1	}