ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

root/Development/ray/src/cv/obj2rad.c

Comparing ray/src/cv/obj2rad.c (file contents):
Revision 2.20 by schorsch, Thu Jun 26 00:58:09 2003 UTC vs.
Revision 2.29 by greg, Fri Nov 8 16:49:04 2013 UTC

#	Line 2 | Line 2
2		static const char       RCSid[] = "$Id$";
3		#endif
4		/*
5	<	* Convert a Wavefront .obj file to Radiance format.
5	>	* Convert a Wavefront .OBJ file to Radiance format.
6		*
7		* Currently, we support only polygonal geometry.  Non-planar
8		* faces are broken rather haphazardly into triangles.
#	Line 10 | Line 10 | static const char      RCSid[] = "$Id$";
10		* I'm not sure they work correctly.  (Taken out -- see TEXMAPS defines.)
11		*/
12
13	<	#include "standard.h"
13	>	#include <stdlib.h>
14	>	#include <stdio.h>
15	>	#include <ctype.h>
16
17	+	#include "rtmath.h"
18	+	#include "rtio.h"
19	+	#include "resolu.h"
20		#include "trans.h"
16	–
21		#include "tmesh.h"
22
19	–	#include <ctype.h>
23
24		#define PATNAME         "M-pat"         /* mesh pattern name (reused) */
25		#define TEXNAME         "M-nor"         /* mesh texture name (reused) */
#	Line 32 | Line 35 | int    nvns;
35		RREAL   (*vtlist)[2];           /* map vertex list */
36		int     nvts;
37
38	+	int     ndegen = 0;             /* count of degenerate faces */
39	+	int     n0norm = 0;             /* count of zero normals */
40	+
41		typedef int     VNDX[3];        /* vertex index (point,map,normal) */
42
43	<	#define CHUNKSIZ        256     /* vertex allocation chunk size */
43	>	#define CHUNKSIZ        1024    /* vertex allocation chunk size */
44
45	<	#define MAXARG          64      /* maximum # arguments in a statement */
45	>	#define MAXARG          512     /* maximum # arguments in a statement */
46
47		/* qualifiers */
48		#define Q_MTL           0
#	Line 65 | Line 71 | char   *defobj = DEFOBJ;       /* default (starting) object na
71
72		int     flatten = 0;            /* discard surface normal information */
73
74	<	char    *getmtl(), *getonm();
75	<
76	<	char    mapname[128];           /* current picture file */
77	<	char    matname[64];            /* current material name */
72	<	char    group[16][32];          /* current group names */
73	<	char    objname[128];           /* current object name */
74	>	char    mapname[256];           /* current picture file */
75	>	char    matname[256];           /* current material name */
76	>	char    group[8][256];          /* current group name(s) */
77	>	char    objname[256];           /* current object name */
78		char    *inpfile;               /* input file name */
79		int     lineno;                 /* current line number */
80		int     faceno;                 /* current face number */
81
82	+	static void getnames(FILE *fp);
83	+	static void convert(FILE *fp);
84	+	static int getstmt(char *av[MAXARG], FILE *fp);
85	+	static char * getmtl(void);
86	+	static char * getonm(void);
87	+	static int matchrule(RULEHD *rp);
88	+	static int cvtndx(VNDX vi, char *vs);
89	+	static int nonplanar(int ac, char **av);
90	+	static int putface(int ac, char **av);
91	+	static int puttri(char *v1, char *v2, char *v3);
92	+	static void freeverts(void);
93	+	static int newv(double x, double y, double z);
94	+	static int newvn(double x, double y, double z);
95	+	static int newvt(double x, double y);
96	+	static void syntax(char *er);
97
98	<	main(argc, argv)                /* read in .obj file and convert */
99	<	int     argc;
100	<	char    *argv[];
98	>
99	>	int
100	>	main(           /* read in .OBJ file and convert */
101	>	int     argc,
102	>	char    *argv[]
103	>	)
104		{
105		int     donames = 0;
106		int     i;
#	Line 100 | Line 122 | char   *argv[];
122		default:
123		goto userr;
124		}
125	<	if (i > argc | i < argc-1)
125	>	if ((i > argc) | (i < argc-1))
126		goto userr;
127		if (i == argc)
128		inpfile = "<stdin>";
#	Line 121 | Line 143 | char   *argv[];
143		printargs(argc, argv, stdout);
144		convert(stdin);
145		}
146	+	if (ndegen)
147	+	printf("# %d degenerate faces\n", ndegen);
148	+	if (n0norm)
149	+	printf("# %d invalid (zero) normals\n", n0norm);
150		exit(0);
151		userr:
152		fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n",
#	Line 129 | Line 155 | userr:
155		}
156
157
158	<	getnames(fp)                    /* get valid qualifier names */
159	<	FILE    *fp;
158	>	void
159	>	getnames(                       /* get valid qualifier names */
160	>	FILE    *fp
161	>	)
162		{
163		char    *argv[MAXARG];
164		int     argc;
165		ID      tmpid;
166	<	register int    i;
166	>	int     i;
167
168	<	while (argc = getstmt(argv, fp))
168	>	while ( (argc = getstmt(argv, fp)) )
169		switch (argv[0][0]) {
170		case 'f':                               /* face */
171		if (!argv[0][1])
#	Line 178 | Line 206 | FILE   *fp;
206		}
207
208
209	<	convert(fp)                     /* convert a T-mesh */
210	<	FILE    *fp;
209	>	void
210	>	convert(                        /* convert an OBJ stream */
211	>	FILE    *fp
212	>	)
213		{
214		char    *argv[MAXARG];
215		int     argc;
216		int     nstats, nunknown;
217	<	register int    i;
217	>	int     i;
218
219		nstats = nunknown = 0;
220		/* scan until EOF */
221	<	while (argc = getstmt(argv, fp)) {
221	>	while ( (argc = getstmt(argv, fp)) ) {
222		switch (argv[0][0]) {
223		case 'v':               /* vertex */
224		switch (argv[0][1]) {
#	Line 247 | Line 277 | FILE   *fp;
277		if (!strcmp(argv[1], "off"))
278		mapname[0] = '\0';
279		else
280	<	sprintf(mapname, "%s.pic", argv[1]);
280	>	sprintf(mapname, "%s.hdr", argv[1]);
281		} else
282		goto unknown;
283		break;
#	Line 263 | Line 293 | FILE   *fp;
293		goto unknown;
294		for (i = 1; i < argc; i++)
295		strcpy(group[i-1], argv[i]);
296	<	group[i-1][0] = '\0';
296	>	group[argc-1][0] = '\0';
297		break;
298		case '#':               /* comment */
299		printargs(argc, argv, stdout);
#	Line 282 | Line 312 | FILE   *fp;
312
313
314		int
315	<	getstmt(av, fp)                         /* read the next statement from fp */
316	<	register char   *av[MAXARG];
317	<	FILE    *fp;
315	>	getstmt(                                /* read the next statement from fp */
316	>	char    *av[MAXARG],
317	>	FILE    *fp
318	>	)
319		{
320	<	extern char     *fgetline();
321	<	static char     sbuf[MAXARG*10];
322	<	register char   *cp;
292	<	register int    i;
320	>	static char     sbuf[MAXARG*16];
321	>	char    *cp;
322	>	int     i;
323
324		do {
325		if (fgetline(cp=sbuf, sizeof(sbuf), fp) == NULL)
#	Line 301 | Line 331 | FILE   *fp;
331		lineno++;
332		*cp++ = '\0';
333		}
334	<	if (!*cp || i >= MAXARG-1)
334	>	if (!*cp)
335		break;
336	+	if (i >= MAXARG-1) {
337	+	fprintf(stderr,
338	+	"warning: line %d: too many arguments (limit %d)\n",
339	+	lineno+1, MAXARG-1);
340	+	break;
341	+	}
342		av[i++] = cp;
343		while (*++cp && !isspace(*cp))
344		;
#	Line 316 | Line 352 | FILE   *fp;
352
353
354		char *
355	<	getmtl()                                /* figure material for this face */
355	>	getmtl(void)                            /* figure material for this face */
356		{
357	<	register RULEHD *rp = ourmapping;
357	>	RULEHD  *rp = ourmapping;
358
359		if (rp == NULL) {               /* no rule set */
360		if (matname[0])
#	Line 342 | Line 378 | getmtl()                               /* figure material for this face */
378
379
380		char *
381	<	getonm()                                /* invent a good name for object */
381	>	getonm(void)                            /* invent a good name for object */
382		{
383		static char     name[64];
384	<	register char   *cp1, *cp2;
385	<	register int    i;
384	>	char    *cp1, *cp2;
385	>	int     i;
386		/* check for preset */
387		if (objname[0])
388		return(objname);
#	Line 357 | Line 393 | getonm()                               /* invent a good name for object */
393		cp2 = group[i];
394		if (cp1 > name)
395		*cp1++ = '.';
396	<	while (*cp1 = *cp2++)
396	>	while ( (*cp1 = *cp2++) )
397		if (++cp1 >= name+sizeof(name)-2) {
398		*cp1 = '\0';
399		return(name);
#	Line 367 | Line 403 | getonm()                               /* invent a good name for object */
403		}
404
405
406	<	matchrule(rp)                           /* check for a match on this rule */
407	<	register RULEHD *rp;
406	>	int
407	>	matchrule(                              /* check for a match on this rule */
408	>	RULEHD  *rp
409	>	)
410		{
411		ID      tmpid;
412		int     gotmatch;
413	<	register int    i;
413	>	int     i;
414
415		if (rp->qflg & FL(Q_MTL)) {
416		if (!matname[0])
#	Line 418 | Line 456 | register RULEHD        *rp;
456		}
457
458
459	<	cvtndx(vi, vs)                          /* convert vertex string to index */
460	<	register VNDX   vi;
461	<	register char   *vs;
459	>	int
460	>	cvtndx(                         /* convert vertex string to index */
461	>	VNDX    vi,
462	>	char    *vs
463	>	)
464		{
465		/* get point */
466		vi[0] = atoi(vs);
#	Line 461 | Line 501 | register char  *vs;
501		return(0);
502		} else
503		vi[2] = -1;
504	+	/* zero normal is not normal */
505	+	if (vi[2] >= 0 && DOT(vnlist[vi[2]],vnlist[vi[2]]) <= FTINY)
506	+	vi[2] = -1;
507		return(1);
508		}
509
510
511	<	nonplanar(ac, av)                       /* are vertices non-planar? */
512	<	register int    ac;
513	<	register char   **av;
511	>	int
512	>	nonplanar(                      /* are vertices non-planar? */
513	>	int     ac,
514	>	char    **av
515	>	)
516		{
517		VNDX    vi;
518		RREAL   *p0, *p1;
519		FVECT   v1, v2, nsum, newn;
520		double  d;
521	<	register int    i;
521	>	int     i;
522
523		if (!cvtndx(vi, av[0]))
524		return(0);
#	Line 516 | Line 561 | register char  **av;
561		}
562
563
564	<	putface(ac, av)                         /* put out an N-sided polygon */
565	<	int     ac;
566	<	register char   **av;
564	>	int
565	>	putface(                                /* put out an N-sided polygon */
566	>	int     ac,
567	>	char    **av
568	>	)
569		{
570		VNDX    vi;
571		char    *cp;
572	<	register int    i;
572	>	int     i;
573
574		if (nonplanar(ac, av)) {        /* break into triangles */
575		while (ac > 2) {
#	Line 549 | Line 596 | register char  **av;
596		}
597
598
599	<	puttri(v1, v2, v3)                      /* put out a triangle */
600	<	char    *v1, *v2, *v3;
599	>	int
600	>	puttri(                 /* put out a triangle */
601	>	char *v1,
602	>	char *v2,
603	>	char *v3
604	>	)
605		{
606		char    *mod;
607		VNDX    v1i, v2i, v3i;
608		BARYCCM bvecs;
609		RREAL   bcoor[3][3];
610	<	int     texOK, patOK;
610	>	int     texOK = 0, patOK;
611		int     flatness;
612	<	register int    i;
612	>	int     i;
613
614		if ((mod = getmtl()) == NULL)
615		return(-1);
#	Line 574 | Line 625 | char   *v1, *v2, *v3;
625
626		switch (flatness) {
627		case DEGEN:                     /* zero area */
628	+	ndegen++;
629		return(-1);
630		case RVFLAT:                    /* reversed normals, but flat */
631		case ISFLAT:                    /* smoothing unnecessary */
#	Line 594 | Line 646 | char   *v1, *v2, *v3;
646		if (texOK | patOK)
647		if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]],
648		vlist[v3i[0]]) < 0)
649	<	return(-1);
649	>	texOK = patOK = 0;
650		/* put out texture (if any) */
651		if (texOK) {
652		printf("\n%s texfunc %s\n", mod, TEXNAME);
#	Line 639 | Line 691 | char   *v1, *v2, *v3;
691		}
692
693
694	<	freeverts()                     /* free all vertices */
694	>	void
695	>	freeverts(void)                 /* free all vertices */
696		{
697		if (nvs) {
698		free((void *)vlist);
#	Line 657 | Line 710 | freeverts()                    /* free all vertices */
710
711
712		int
713	<	newv(x, y, z)                   /* create a new vertex */
714	<	double  x, y, z;
713	>	newv(                   /* create a new vertex */
714	>	double  x,
715	>	double  y,
716	>	double  z
717	>	)
718		{
719		if (!(nvs%CHUNKSIZ)) {          /* allocate next block */
720		if (nvs == 0)
#	Line 681 | Line 737 | double x, y, z;
737
738
739		int
740	<	newvn(x, y, z)                  /* create a new vertex normal */
741	<	double  x, y, z;
740	>	newvn(                  /* create a new vertex normal */
741	>	double  x,
742	>	double  y,
743	>	double  z
744	>	)
745		{
746		if (!(nvns%CHUNKSIZ)) {         /* allocate next block */
747		if (nvns == 0)
#	Line 700 | Line 759 | double x, y, z;
759		vnlist[nvns][0] = x;
760		vnlist[nvns][1] = y;
761		vnlist[nvns][2] = z;
762	<	if (normalize(vnlist[nvns]) == 0.0)
704	<	return(0);
762	>	n0norm += (normalize(vnlist[nvns]) == 0.0);
763		return(++nvns);
764		}
765
766
767		int
768	<	newvt(x, y)                     /* create a new texture map vertex */
769	<	double  x, y;
768	>	newvt(                  /* create a new texture map vertex */
769	>	double  x,
770	>	double  y
771	>	)
772		{
773		if (!(nvts%CHUNKSIZ)) {         /* allocate next block */
774		if (nvts == 0)
#	Line 730 | Line 790 | double x, y;
790		}
791
792
793	<	syntax(er)                      /* report syntax error and exit */
794	<	char    *er;
793	>	void
794	>	syntax(                 /* report syntax error and exit */
795	>	char    *er
796	>	)
797		{
798		fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n",
799		inpfile, lineno, er);

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines (old)
>	Changed lines (new)