[ViewVC] Diff of: radiance/ray/src/cv/obj2rad.c

Comparing ray/src/cv/obj2rad.c (file contents):
Revision 2.1 by greg, Tue Apr 12 17:12:42 1994 UTC vs.
Revision 2.22 by schorsch, Sat Nov 15 17:54:06 2003 UTC

#	Line 1 \| Line 1
1	–	/* Copyright (c) 1994 Regents of the University of California */
2	–
1		#ifndef lint
2	<	static char SCCSid[] = "$SunId$ LBL";
2	>	static const char RCSid[] = "$Id$";
3		#endif
6	–
4		/*
5		* Convert a Wavefront .obj file to Radiance format.
6		*
7	<	* Currently, we support only polygonal geometry, and faces
8	<	* must be either quads or triangles for smoothing to work.
9	<	* Also, texture indices only work for triangles, though
10	<	* I'm not sure they work correctly.
7	>	* Currently, we support only polygonal geometry. Non-planar
8	>	* faces are broken rather haphazardly into triangles.
9	>	* Also, texture map indices only work for triangles, though
10	>	* I'm not sure they work correctly. (Taken out -- see TEXMAPS defines.)
11		*/
12
13	<	#include "standard.h"
14	<
13	>	#include <stdlib.h>
14	>	#include <stdio.h>
15		#include <ctype.h>
16
17	<	#define VOIDID "void" /* this is defined in object.h */
17	>	#include "rtmath.h"
18	>	#include "rtio.h"
19	>	#include "resolu.h"
20	>	#include "trans.h"
21	>	#include "tmesh.h"
22
23	<	#define TCALNAME "tmesh.cal" /* triangle interp. file */
23	<	#define QCALNAME "surf.cal" /* quad interp. file */
23	>
24		#define PATNAME "M-pat" /* mesh pattern name (reused) */
25		#define TEXNAME "M-nor" /* mesh texture name (reused) */
26	+	#define DEFOBJ "unnamed" /* default object name */
27	+	#define DEFMAT "white" /* default material name */
28
27	–	#define ABS(x) ((x)>=0 ? (x) : -(x))
28	–
29		#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2])
30
31		FVECT vlist; / our vertex list */
32		int nvs; /* number of vertices in our list */
33		FVECT vnlist; / vertex normal list */
34		int nvns;
35	<	FLOAT (vtlist)[2]; / texture vertex list */
35	>	RREAL (vtlist)[2]; / map vertex list */
36		int nvts;
37
38	<	typedef FLOAT BARYCCM[3][4]; /* barycentric coordinate system */
38	>	typedef int VNDX[3]; /* vertex index (point,map,normal) */
39
40	<	typedef int VNDX[3]; /* vertex index (point,texture,normal) */
40	>	#define CHUNKSIZ 256 /* vertex allocation chunk size */
41
42	–	#define CHUNKSIZ 128 /* vertex allocation chunk size */
43	–
42		#define MAXARG 64 /* maximum # arguments in a statement */
43
44	<	char defmat = VOIDID; / default (starting) material name */
45	<	char defpat = ""; / default (starting) picture name */
46	<	char defobj = "F"; / default (starting) object name */
44	>	/* qualifiers */
45	>	#define Q_MTL 0
46	>	#define Q_MAP 1
47	>	#define Q_GRP 2
48	>	#define Q_OBJ 3
49	>	#define Q_FAC 4
50	>	#define NQUALS 5
51
52	<	char picfile[128]; /* current picture file */
52	>	char *qname[NQUALS] = {
53	>	"Material",
54	>	"Map",
55	>	"Group",
56	>	"Object",
57	>	"Face",
58	>	};
59	>
60	>	QLIST qlist = {NQUALS, qname};
61	>	/* valid qualifier ids */
62	>	IDLIST qual[NQUALS];
63	>	/* mapping rules */
64	>	RULEHD *ourmapping = NULL;
65	>
66	>	char defmat = DEFMAT; / default (starting) material name */
67	>	char defobj = DEFOBJ; / default (starting) object name */
68	>
69	>	int flatten = 0; /* discard surface normal information */
70	>
71	>	char mapname[128]; /* current picture file */
72		char matname[64]; /* current material name */
73	+	char group[16][32]; /* current group names */
74		char objname[128]; /* current object name */
75	+	char inpfile; / input file name */
76		int lineno; /* current line number */
77	+	int faceno; /* current face number */
78
79	<	int nfaces; /* total number of faces output */
79	>	static void getnames(FILE *fp);
80	>	static void convert(FILE *fp);
81	>	static int getstmt(char av[MAXARG], FILE fp);
82	>	static char * getmtl(void);
83	>	static char * getonm(void);
84	>	static int matchrule(RULEHD *rp);
85	>	static int cvtndx(VNDX vi, char *vs);
86	>	static int nonplanar(int ac, char **av);
87	>	static int putface(int ac, char **av);
88	>	static int puttri(char v1, char v2, char *v3);
89	>	static void freeverts(void);
90	>	static int newv(double x, double y, double z);
91	>	static int newvn(double x, double y, double z);
92	>	static int newvt(double x, double y);
93	>	static void syntax(char *er);
94
95
96	<	main(argc, argv) /* read in T-mesh files and convert */
97	<	int argc;
98	<	char *argv[];
96	>	int
97	>	main( /* read in .obj file and convert */
98	>	int argc,
99	>	char *argv[]
100	>	)
101		{
102	<	FILE *fp;
102	>	int donames = 0;
103		int i;
104
105		for (i = 1; i < argc && argv[i][0] == '-'; i++)
#	Line 67 \| Line 107 \| *char argv[];**
107		case 'o': /* object name */
108		defobj = argv[++i];
109		break;
110	<	case 'm': /* default material */
111	<	defmat = argv[++i];
110	>	case 'n': /* just produce name list */
111	>	donames++;
112		break;
113	<	case 'p': /* default picture */
114	<	defpat = argv[++i];
113	>	case 'm': /* use custom mapfile */
114	>	ourmapping = getmapping(argv[++i], &qlist);
115		break;
116	+	case 'f': /* flatten surfaces */
117	+	flatten++;
118	+	break;
119		default:
120	<	fprintf(stderr,
78	<	"Usage: %s [-o obj][-m mat][-p pic] [file ..]\n",
79	<	argv[0]);
80	<	exit(1);
120	>	goto userr;
121		}
122	<	if (i >= argc)
123	<	convert("<stdin>", stdin);
124	<	else
125	<	for ( ; i < argc; i++) {
126	<	if ((fp = fopen(argv[i], "r")) == NULL) {
127	<	perror(argv[i]);
128	<	exit(1);
122	>	if ((i > argc) \| (i < argc-1))
123	>	goto userr;
124	>	if (i == argc)
125	>	inpfile = "<stdin>";
126	>	else if (freopen(inpfile=argv[i], "r", stdin) == NULL) {
127	>	fprintf(stderr, "%s: cannot open\n", inpfile);
128	>	exit(1);
129	>	}
130	>	if (donames) { /* scan for ids */
131	>	getnames(stdin);
132	>	printf("filename \"%s\"\n", inpfile);
133	>	printf("filetype \"Wavefront\"\n");
134	>	write_quals(&qlist, qual, stdout);
135	>	printf("qualifier %s begin\n", qlist.qual[Q_FAC]);
136	>	printf("[%d:%d]\n", 1, faceno);
137	>	printf("end\n");
138	>	} else { /* translate file */
139	>	printf("# ");
140	>	printargs(argc, argv, stdout);
141	>	convert(stdin);
142	>	}
143	>	exit(0);
144	>	userr:
145	>	fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n",
146	>	argv[0]);
147	>	exit(1);
148	>	}
149	>
150	>
151	>	void
152	>	getnames( /* get valid qualifier names */
153	>	FILE *fp
154	>	)
155	>	{
156	>	char *argv[MAXARG];
157	>	int argc;
158	>	ID tmpid;
159	>	register int i;
160	>
161	>	while ( (argc = getstmt(argv, fp)) )
162	>	switch (argv[0][0]) {
163	>	case 'f': /* face */
164	>	if (!argv[0][1])
165	>	faceno++;
166	>	break;
167	>	case 'u':
168	>	if (!strcmp(argv[0], "usemtl")) { /* material */
169	>	if (argc < 2)
170	>	break; /* not fatal */
171	>	tmpid.number = 0;
172	>	tmpid.name = argv[1];
173	>	findid(&qual[Q_MTL], &tmpid, 1);
174	>	} else if (!strcmp(argv[0], "usemap")) {/* map */
175	>	if (argc < 2 \|\| !strcmp(argv[1], "off"))
176	>	break; /* not fatal */
177	>	tmpid.number = 0;
178	>	tmpid.name = argv[1];
179	>	findid(&qual[Q_MAP], &tmpid, 1);
180		}
181	<	convert(argv[i], fp);
182	<	fclose(fp);
181	>	break;
182	>	case 'o': /* object name */
183	>	if (argv[0][1] \|\| argc < 2)
184	>	break;
185	>	tmpid.number = 0;
186	>	tmpid.name = argv[1];
187	>	findid(&qual[Q_OBJ], &tmpid, 1);
188	>	break;
189	>	case 'g': /* group name(s) */
190	>	if (argv[0][1])
191	>	break;
192	>	tmpid.number = 0;
193	>	for (i = 1; i < argc; i++) {
194	>	tmpid.name = argv[i];
195	>	findid(&qual[Q_GRP], &tmpid, 1);
196	>	}
197	>	break;
198		}
93	–	exit(0);
199		}
200
201
202	<	convert(fname, fp) /* convert a T-mesh */
203	<	char *fname;
204	<	FILE *fp;
202	>	void
203	>	convert( /* convert a T-mesh */
204	>	FILE *fp
205	>	)
206		{
207		char *argv[MAXARG];
208		int argc;
209		int nstats, nunknown;
210		register int i;
105	–	/* start fresh */
106	–	freeverts();
107	–	strcpy(picfile, defpat);
108	–	strcpy(matname, defmat);
109	–	strcpy(objname, defobj);
110	–	lineno = 0;
111	–	nstats = nunknown = 0;
211
212	<	printf("\n# Wavefront file read from: %s\n", fname);
212	>	nstats = nunknown = 0;
213		/* scan until EOF */
214	<	while (argc = getstmt(argv, fp)) {
214	>	while ( (argc = getstmt(argv, fp)) ) {
215		switch (argv[0][0]) {
216		case 'v': /* vertex */
217		switch (argv[0][1]) {
218		case '\0': /* point */
219		if (badarg(argc-1,argv+1,"fff"))
220	<	syntax(fname, lineno, "Bad vertex");
220	>	syntax("Bad vertex");
221		newv(atof(argv[1]), atof(argv[2]),
222		atof(argv[3]));
223		break;
#	Line 126 \| Line 225 \| *FILE fp;**
225		if (argv[0][2])
226		goto unknown;
227		if (badarg(argc-1,argv+1,"fff"))
228	<	syntax(fname, lineno, "Bad normal");
228	>	syntax("Bad normal");
229		if (!newvn(atof(argv[1]), atof(argv[2]),
230		atof(argv[3])))
231	<	syntax(fname, lineno, "Zero normal");
231	>	syntax("Zero normal");
232		break;
233	<	case 't': /* texture */
233	>	case 't': /* texture map */
234		if (argv[0][2])
235		goto unknown;
236		if (badarg(argc-1,argv+1,"ff"))
#	Line 145 \| Line 244 \| *FILE fp;**
244		case 'f': /* face */
245		if (argv[0][1])
246		goto unknown;
247	+	faceno++;
248		switch (argc-1) {
249		case 0: case 1: case 2:
250	<	syntax(fname, lineno, "Too few vertices");
250	>	syntax("Too few vertices");
251		break;
252		case 3:
253		if (!puttri(argv[1], argv[2], argv[3]))
254	<	syntax(fname, lineno, "Bad triangle");
254	>	syntax("Bad triangle");
255		break;
156	–	case 4:
157	–	if (!putquad(argv[1], argv[2],
158	–	argv[3], argv[4]))
159	–	syntax(fname, lineno, "Bad quad");
160	–	break;
256		default:
257		if (!putface(argc-1, argv+1))
258	<	syntax(fname, lineno, "Bad face");
258	>	syntax("Bad face");
259		break;
260		}
261		break;
#	Line 173 \| Line 268 \| *FILE fp;**
268		if (argc < 2)
269		break; /* not fatal */
270		if (!strcmp(argv[1], "off"))
271	<	picfile[0] = '\0';
271	>	mapname[0] = '\0';
272		else
273	<	strcpy(picfile, argv[1]);
273	>	sprintf(mapname, "%s.pic", argv[1]);
274		} else
275		goto unknown;
276		break;
#	Line 189 \| Line 284 \| *FILE fp;**
284		case 'g': /* group name(s) */
285		if (argv[0][1])
286		goto unknown;
192	–	if (argc < 2)
193	–	break; /* not fatal */
194	–	objname[0] = '\0';
287		for (i = 1; i < argc; i++)
288	<	if (objname[0])
289	<	sprintf(objname+strlen(objname),
198	<	".%s", argv[i]);
199	<	else
200	<	strcpy(objname, argv[i]);
288	>	strcpy(group[i-1], argv[i]);
289	>	group[i-1][0] = '\0';
290		break;
291		case '#': /* comment */
292	+	printargs(argc, argv, stdout);
293		break;
294		default:; /* something we don't deal with */
295		unknown:
#	Line 208 \| Line 298 \| *FILE fp;**
298		}
299		nstats++;
300		}
301	<	printf("# Done processing file: %s\n", fname);
301	>	printf("\n# Done processing file: %s\n", inpfile);
302		printf("# %d lines, %d statements, %d unrecognized\n",
303		lineno, nstats, nunknown);
304		}
305
306
307		int
308	<	getstmt(av, fp) /* read the next statement from fp */
309	<	register char *av[MAXARG];
310	<	FILE *fp;
308	>	getstmt( /* read the next statement from fp */
309	>	register char *av[MAXARG],
310	>	FILE *fp
311	>	)
312		{
313		extern char *fgetline();
314		static char sbuf[MAXARG*10];
#	Line 246 \| Line 337 \| *FILE fp;**
337
338		return(i);
339		}
249	–
340
341	<	cvtndx(vi, vs) /* convert vertex string to index */
342	<	register VNDX vi;
343	<	register char *vs;
341	>
342	>	char *
343	>	getmtl(void) /* figure material for this face */
344		{
345	+	register RULEHD *rp = ourmapping;
346	+
347	+	if (rp == NULL) { /* no rule set */
348	+	if (matname[0])
349	+	return(matname);
350	+	if (group[0][0])
351	+	return(group[0]);
352	+	return(defmat);
353	+	}
354	+	/* check for match */
355	+	do {
356	+	if (matchrule(rp)) {
357	+	if (!strcmp(rp->mnam, VOIDID))
358	+	return(NULL); /* match is null */
359	+	return(rp->mnam);
360	+	}
361	+	rp = rp->next;
362	+	} while (rp != NULL);
363	+	/* no match found */
364	+	return(NULL);
365	+	}
366	+
367	+
368	+	char *
369	+	getonm(void) /* invent a good name for object */
370	+	{
371	+	static char name[64];
372	+	register char cp1, cp2;
373	+	register int i;
374	+	/* check for preset */
375	+	if (objname[0])
376	+	return(objname);
377	+	if (!group[0][0])
378	+	return(defobj);
379	+	cp1 = name; /* else make name out of groups */
380	+	for (i = 0; group[i][0]; i++) {
381	+	cp2 = group[i];
382	+	if (cp1 > name)
383	+	*cp1++ = '.';
384	+	while ( (cp1 = cp2++) )
385	+	if (++cp1 >= name+sizeof(name)-2) {
386	+	*cp1 = '\0';
387	+	return(name);
388	+	}
389	+	}
390	+	return(name);
391	+	}
392	+
393	+
394	+	int
395	+	matchrule( /* check for a match on this rule */
396	+	register RULEHD *rp
397	+	)
398	+	{
399	+	ID tmpid;
400	+	int gotmatch;
401	+	register int i;
402	+
403	+	if (rp->qflg & FL(Q_MTL)) {
404	+	if (!matname[0])
405	+	return(0);
406	+	tmpid.number = 0;
407	+	tmpid.name = matname;
408	+	if (!matchid(&tmpid, &idm(rp)[Q_MTL]))
409	+	return(0);
410	+	}
411	+	if (rp->qflg & FL(Q_MAP)) {
412	+	if (!mapname[0])
413	+	return(0);
414	+	tmpid.number = 0;
415	+	tmpid.name = mapname;
416	+	if (!matchid(&tmpid, &idm(rp)[Q_MAP]))
417	+	return(0);
418	+	}
419	+	if (rp->qflg & FL(Q_GRP)) {
420	+	tmpid.number = 0;
421	+	gotmatch = 0;
422	+	for (i = 0; group[i][0]; i++) {
423	+	tmpid.name = group[i];
424	+	gotmatch \|= matchid(&tmpid, &idm(rp)[Q_GRP]);
425	+	}
426	+	if (!gotmatch)
427	+	return(0);
428	+	}
429	+	if (rp->qflg & FL(Q_OBJ)) {
430	+	if (!objname[0])
431	+	return(0);
432	+	tmpid.number = 0;
433	+	tmpid.name = objname;
434	+	if (!matchid(&tmpid, &idm(rp)[Q_OBJ]))
435	+	return(0);
436	+	}
437	+	if (rp->qflg & FL(Q_FAC)) {
438	+	tmpid.name = NULL;
439	+	tmpid.number = faceno;
440	+	if (!matchid(&tmpid, &idm(rp)[Q_FAC]))
441	+	return(0);
442	+	}
443	+	return(1);
444	+	}
445	+
446	+
447	+	int
448	+	cvtndx( /* convert vertex string to index */
449	+	register VNDX vi,
450	+	register char *vs
451	+	)
452	+	{
453		/* get point */
454		vi[0] = atoi(vs);
455		if (vi[0] > 0) {
456		if (vi[0]-- > nvs)
457		return(0);
458		} else if (vi[0] < 0) {
459	<	vi[0] = nvs + vi[0];
459	>	vi[0] += nvs;
460		if (vi[0] < 0)
461		return(0);
462		} else
463		return(0);
464	<	/* get texture */
464	>	/* get map */
465		while (*vs)
466		if (*vs++ == '/')
467		break;
#	Line 272 \| Line 470 \| *register char vs;**
470		if (vi[1]-- > nvts)
471		return(0);
472		} else if (vi[1] < 0) {
473	<	vi[1] = nvts + vi[1];
473	>	vi[1] += nvts;
474		if (vi[1] < 0)
475		return(0);
476		} else
#	Line 286 \| Line 484 \| *register char vs;**
484		if (vi[2]-- > nvns)
485		return(0);
486		} else if (vi[2] < 0) {
487	<	vi[2] = nvns + vi[2];
487	>	vi[2] += nvns;
488		if (vi[2] < 0)
489		return(0);
490		} else
#	Line 295 \| Line 493 \| *register char vs;**
493		}
494
495
496	<	putface(ac, av) /* put out an N-sided polygon */
497	<	register int ac;
498	<	register char **av;
496	>	int
497	>	nonplanar( /* are vertices non-planar? */
498	>	register int ac,
499	>	register char **av
500	>	)
501		{
502		VNDX vi;
503	+	RREAL p0, p1;
504	+	FVECT v1, v2, nsum, newn;
505	+	double d;
506	+	register int i;
507
508	<	printf("\n%s polygon %s.%d\n", matname, objname, ++nfaces);
508	>	if (!cvtndx(vi, av[0]))
509	>	return(0);
510	>	if (!flatten && vi[2] >= 0)
511	>	return(1); /* has interpolated normals */
512	>	if (ac < 4)
513	>	return(0); /* it's a triangle! */
514	>	/* set up */
515	>	p0 = vlist[vi[0]];
516	>	if (!cvtndx(vi, av[1]))
517	>	return(0); /* error gets caught later */
518	>	nsum[0] = nsum[1] = nsum[2] = 0.;
519	>	p1 = vlist[vi[0]];
520	>	fvsum(v2, p1, p0, -1.0);
521	>	for (i = 2; i < ac; i++) {
522	>	VCOPY(v1, v2);
523	>	if (!cvtndx(vi, av[i]))
524	>	return(0);
525	>	p1 = vlist[vi[0]];
526	>	fvsum(v2, p1, p0, -1.0);
527	>	fcross(newn, v1, v2);
528	>	if (normalize(newn) == 0.0) {
529	>	if (i < 3)
530	>	return(1); /* can't deal with this */
531	>	fvsum(nsum, nsum, nsum, 1./(i-2));
532	>	continue;
533	>	}
534	>	d = fdot(newn,nsum);
535	>	if (d >= 0) {
536	>	if (d < (1.0-FTINY)*(i-2))
537	>	return(1);
538	>	fvsum(nsum, nsum, newn, 1.0);
539	>	} else {
540	>	if (d > -(1.0-FTINY)*(i-2))
541	>	return(1);
542	>	fvsum(nsum, nsum, newn, -1.0);
543	>	}
544	>	}
545	>	return(0);
546	>	}
547	>
548	>
549	>	int
550	>	putface( /* put out an N-sided polygon */
551	>	int ac,
552	>	register char **av
553	>	)
554	>	{
555	>	VNDX vi;
556	>	char *cp;
557	>	register int i;
558	>
559	>	if (nonplanar(ac, av)) { /* break into triangles */
560	>	while (ac > 2) {
561	>	if (!puttri(av[0], av[1], av[2]))
562	>	return(0);
563	>	ac--; /* remove vertex & rotate */
564	>	cp = av[0];
565	>	for (i = 0; i < ac-1; i++)
566	>	av[i] = av[i+2];
567	>	av[i] = cp;
568	>	}
569	>	return(1);
570	>	}
571	>	if ((cp = getmtl()) == NULL)
572	>	return(-1);
573	>	printf("\n%s polygon %s.%d\n", cp, getonm(), faceno);
574		printf("0\n0\n%d\n", 3*ac);
575	<	while (ac--) {
576	<	if (!cvtndx(vi, *av++))
575	>	for (i = 0; i < ac; i++) {
576	>	if (!cvtndx(vi, av[i]))
577		return(0);
578		pvect(vlist[vi[0]]);
579		}
#	Line 312 \| Line 581 \| register char av;**
581		}
582
583
584	<	puttri(v1, v2, v3) /* put out a triangle */
585	<	char v1, v2, *v3;
584	>	int
585	>	puttri( /* put out a triangle */
586	>	char *v1,
587	>	char *v2,
588	>	char *v3
589	>	)
590		{
591	<	char *mod = matname;
591	>	char *mod;
592		VNDX v1i, v2i, v3i;
593		BARYCCM bvecs;
594	+	RREAL bcoor[3][3];
595	+	int texOK = 0, patOK;
596	+	int flatness;
597	+	register int i;
598
599	+	if ((mod = getmtl()) == NULL)
600	+	return(-1);
601	+
602		if (!cvtndx(v1i, v1) \|\| !cvtndx(v2i, v2) \|\| !cvtndx(v3i, v3))
603		return(0);
604		/* compute barycentric coordinates */
605	<	if ((v1i[2]>=0&&v2i[2]>=0&&v3i[2]>=0) \|\|
606	<	(v1i[1]>=0&&v2i[1]>=0&&v3i[1]>=0))
607	<	if (comp_baryc(bvecs, vlist[v1i[0]], vlist[v2i[0]],
605	>	if (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0)
606	>	flatness = flat_tri(vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]],
607	>	vnlist[v1i[2]], vnlist[v2i[2]], vnlist[v3i[2]]);
608	>	else
609	>	flatness = ISFLAT;
610	>
611	>	switch (flatness) {
612	>	case DEGEN: /* zero area */
613	>	return(-1);
614	>	case RVFLAT: /* reversed normals, but flat */
615	>	case ISFLAT: /* smoothing unnecessary */
616	>	texOK = 0;
617	>	break;
618	>	case RVBENT: /* reversed normals with smoothing */
619	>	case ISBENT: /* proper smoothing */
620	>	texOK = 1;
621	>	break;
622	>	}
623	>	if (flatten)
624	>	texOK = 0;
625	>	#ifdef TEXMAPS
626	>	patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0);
627	>	#else
628	>	patOK = 0;
629	>	#endif
630	>	if (texOK \| patOK)
631	>	if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]],
632		vlist[v3i[0]]) < 0)
633	<	return(0);
633	>	return(-1);
634		/* put out texture (if any) */
635	<	if (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0) {
635	>	if (texOK) {
636		printf("\n%s texfunc %s\n", mod, TEXNAME);
637		mod = TEXNAME;
638		printf("4 dx dy dz %s\n", TCALNAME);
639	<	printf("0\n21\n");
640	<	put_baryc(bvecs);
641	<	printf("\t%14.12g %14.12g %14.12g\n",
642	<	vnlist[v1i[2]][0], vnlist[v2i[2]][0],
643	<	vnlist[v3i[2]][0]);
644	<	printf("\t%14.12g %14.12g %14.12g\n",
645	<	vnlist[v1i[2]][1], vnlist[v2i[2]][1],
342	<	vnlist[v3i[2]][1]);
343	<	printf("\t%14.12g %14.12g %14.12g\n",
344	<	vnlist[v1i[2]][2], vnlist[v2i[2]][2],
345	<	vnlist[v3i[2]][2]);
639	>	printf("0\n");
640	>	for (i = 0; i < 3; i++) {
641	>	bcoor[i][0] = vnlist[v1i[2]][i];
642	>	bcoor[i][1] = vnlist[v2i[2]][i];
643	>	bcoor[i][2] = vnlist[v3i[2]][i];
644	>	}
645	>	put_baryc(&bvecs, bcoor, 3);
646		}
647	+	#ifdef TEXMAPS
648		/* put out pattern (if any) */
649	<	if (picfile[0] && v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0) {
649	>	if (patOK) {
650		printf("\n%s colorpict %s\n", mod, PATNAME);
651		mod = PATNAME;
652	<	printf("7 noneg noneg noneg %s %s u v\n", picfile, TCALNAME);
653	<	printf("0\n18\n");
654	<	put_baryc(bvecs);
655	<	printf("\t%f %f %f\n", vtlist[v1i[1]][0],
656	<	vtlist[v2i[1]][0], vtlist[v3i[1]][0]);
657	<	printf("\t%f %f %f\n", vtlist[v1i[1]][1],
658	<	vtlist[v2i[1]][1], vtlist[v3i[1]][1]);
652	>	printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME);
653	>	printf("0\n");
654	>	for (i = 0; i < 2; i++) {
655	>	bcoor[i][0] = vtlist[v1i[1]][i];
656	>	bcoor[i][1] = vtlist[v2i[1]][i];
657	>	bcoor[i][2] = vtlist[v3i[1]][i];
658	>	}
659	>	put_baryc(&bvecs, bcoor, 2);
660		}
661	<	/* put out triangle */
662	<	printf("\n%s polygon %s.%d\n", matname, objname, ++nfaces);
661	>	#endif
662	>	/* put out (reversed) triangle */
663	>	printf("\n%s polygon %s.%d\n", mod, getonm(), faceno);
664		printf("0\n0\n9\n");
665	<	pvect(vlist[v1i[0]]);
666	<	pvect(vlist[v2i[0]]);
667	<	pvect(vlist[v3i[0]]);
668	<
669	<	return(1);
670	<	}
671	<
672	<
370	<	int
371	<	comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */
372	<	register BARYCCM bcm;
373	<	FLOAT v1, v2, *v3;
374	<	{
375	<	FLOAT *vt;
376	<	FVECT va, vab, vcb;
377	<	double d;
378	<	register int i, j;
379	<
380	<	for (j = 0; j < 3; j++) {
381	<	for (i = 0; i < 3; i++) {
382	<	vab[i] = v1[i] - v2[i];
383	<	vcb[i] = v3[i] - v2[i];
384	<	}
385	<	d = DOT(vcb,vcb);
386	<	if (d <= FTINY)
387	<	return(-1);
388	<	d = DOT(vcb,vab)/d;
389	<	for (i = 0; i < 3; i++)
390	<	va[i] = vab[i] - vcb[i]*d;
391	<	d = DOT(va,va);
392	<	if (d <= FTINY)
393	<	return(-1);
394	<	for (i = 0; i < 3; i++) {
395	<	va[i] /= d;
396	<	bcm[j][i] = va[i];
397	<	}
398	<	bcm[j][3] = -DOT(v2,va);
399	<	/* rotate vertices */
400	<	vt = v1;
401	<	v1 = v2;
402	<	v2 = v3;
403	<	v3 = vt;
665	>	if (flatness == RVFLAT \|\| flatness == RVBENT) {
666	>	pvect(vlist[v3i[0]]);
667	>	pvect(vlist[v2i[0]]);
668	>	pvect(vlist[v1i[0]]);
669	>	} else {
670	>	pvect(vlist[v1i[0]]);
671	>	pvect(vlist[v2i[0]]);
672	>	pvect(vlist[v3i[0]]);
673		}
405	–	return(0);
406	–	}
407	–
408	–
409	–	put_baryc(bcm) /* put barycentric coord. vectors */
410	–	register BARYCCM bcm;
411	–	{
412	–	register int i;
413	–
414	–	for (i = 0; i < 3; i++)
415	–	printf("%14.8f %14.8f %14.8f %14.8f\n",
416	–	bcm[i][0], bcm[i][1], bcm[i][2], bcm[i][3]);
417	–	}
418	–
419	–
420	–	putquad(p0, p1, p2, p3) /* put out a quadrilateral */
421	–	char p0, p1, p2, p3;
422	–	{
423	–	VNDX p0i, p1i, p2i, p3i;
424	–	FVECT norm[4];
425	–	int axis;
426	–	FVECT v1, v2, vc1, vc2;
427	–	int ok1, ok2;
428	–	/* get actual indices */
429	–	if (!cvtndx(p0i,p0) \|\| !cvtndx(p1i,p1) \|\|
430	–	!cvtndx(p2i,p2) \|\| !cvtndx(p3i,p3))
431	–	return(0);
432	–	/* compute exact normals */
433	–	fvsum(v1, vlist[p1i[0]], vlist[p0i[0]], -1.0);
434	–	fvsum(v2, vlist[p2i[0]], vlist[p0i[0]], -1.0);
435	–	fcross(vc1, v1, v2);
436	–	ok1 = normalize(vc1) != 0.0;
437	–	fvsum(v1, vlist[p2i[0]], vlist[p3i[0]], -1.0);
438	–	fvsum(v2, vlist[p1i[0]], vlist[p3i[0]], -1.0);
439	–	fcross(vc2, v1, v2);
440	–	ok2 = normalize(vc2) != 0.0;
441	–	if (!(ok1 \| ok2))
442	–	return(0);
443	–	/* compute normal interpolation */
444	–	axis = norminterp(norm, p0i, p1i, p2i, p3i);
445	–
446	–	/* put out quadrilateral? */
447	–	if (ok1 & ok2 && fdot(vc1,vc2) >= 1.0-FTINY*FTINY) {
448	–	printf("\n%s ", matname);
449	–	if (axis != -1) {
450	–	printf("texfunc %s\n", TEXNAME);
451	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
452	–	printf("0\n13\t%d\n", axis);
453	–	pvect(norm[0]);
454	–	pvect(norm[1]);
455	–	pvect(norm[2]);
456	–	fvsum(v1, norm[3], vc1, -0.5);
457	–	fvsum(v1, v1, vc2, -0.5);
458	–	pvect(v1);
459	–	printf("\n%s ", TEXNAME);
460	–	}
461	–	printf("polygon %s.%d\n", objname, ++nfaces);
462	–	printf("0\n0\n12\n");
463	–	pvect(vlist[p0i[0]]);
464	–	pvect(vlist[p1i[0]]);
465	–	pvect(vlist[p3i[0]]);
466	–	pvect(vlist[p2i[0]]);
467	–	return(1);
468	–	}
469	–	/* put out triangles? */
470	–	if (ok1) {
471	–	printf("\n%s ", matname);
472	–	if (axis != -1) {
473	–	printf("texfunc %s\n", TEXNAME);
474	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
475	–	printf("0\n13\t%d\n", axis);
476	–	pvect(norm[0]);
477	–	pvect(norm[1]);
478	–	pvect(norm[2]);
479	–	fvsum(v1, norm[3], vc1, -1.0);
480	–	pvect(v1);
481	–	printf("\n%s ", TEXNAME);
482	–	}
483	–	printf("polygon %s.%d\n", objname, ++nfaces);
484	–	printf("0\n0\n9\n");
485	–	pvect(vlist[p0i[0]]);
486	–	pvect(vlist[p1i[0]]);
487	–	pvect(vlist[p2i[0]]);
488	–	}
489	–	if (ok2) {
490	–	printf("\n%s ", matname);
491	–	if (axis != -1) {
492	–	printf("texfunc %s\n", TEXNAME);
493	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
494	–	printf("0\n13\t%d\n", axis);
495	–	pvect(norm[0]);
496	–	pvect(norm[1]);
497	–	pvect(norm[2]);
498	–	fvsum(v2, norm[3], vc2, -1.0);
499	–	pvect(v2);
500	–	printf("\n%s ", TEXNAME);
501	–	}
502	–	printf("polygon %s.%d\n", objname, ++nfaces);
503	–	printf("0\n0\n9\n");
504	–	pvect(vlist[p2i[0]]);
505	–	pvect(vlist[p1i[0]]);
506	–	pvect(vlist[p3i[0]]);
507	–	}
674		return(1);
675		}
676
677
678	<	int
679	<	norminterp(resmat, p0i, p1i, p2i, p3i) /* compute normal interpolation */
514	<	register FVECT resmat[4];
515	<	register VNDX p0i, p1i, p2i, p3i;
678	>	void
679	>	freeverts(void) /* free all vertices */
680		{
517	–	#define u ((ax+1)%3)
518	–	#define v ((ax+2)%3)
519	–
520	–	register int ax;
521	–	MAT4 eqnmat;
522	–	FVECT v1;
523	–	register int i, j;
524	–
525	–	if (!(p0i[2]>=0 && p1i[2]>=0 && p2i[2]>=0 && p3i[2]>=0))
526	–	return(-1);
527	–	/* find dominant axis */
528	–	VCOPY(v1, vnlist[p0i[2]]);
529	–	fvsum(v1, v1, vnlist[p1i[2]], 1.0);
530	–	fvsum(v1, v1, vnlist[p2i[2]], 1.0);
531	–	fvsum(v1, v1, vnlist[p3i[2]], 1.0);
532	–	ax = ABS(v1[0]) > ABS(v1[1]) ? 0 : 1;
533	–	ax = ABS(v1[ax]) > ABS(v1[2]) ? ax : 2;
534	–	/* assign equation matrix */
535	–	eqnmat[0][0] = vlist[p0i[0]][u]*vlist[p0i[0]][v];
536	–	eqnmat[0][1] = vlist[p0i[0]][u];
537	–	eqnmat[0][2] = vlist[p0i[0]][v];
538	–	eqnmat[0][3] = 1.0;
539	–	eqnmat[1][0] = vlist[p1i[0]][u]*vlist[p1i[0]][v];
540	–	eqnmat[1][1] = vlist[p1i[0]][u];
541	–	eqnmat[1][2] = vlist[p1i[0]][v];
542	–	eqnmat[1][3] = 1.0;
543	–	eqnmat[2][0] = vlist[p2i[0]][u]*vlist[p2i[0]][v];
544	–	eqnmat[2][1] = vlist[p2i[0]][u];
545	–	eqnmat[2][2] = vlist[p2i[0]][v];
546	–	eqnmat[2][3] = 1.0;
547	–	eqnmat[3][0] = vlist[p3i[0]][u]*vlist[p3i[0]][v];
548	–	eqnmat[3][1] = vlist[p3i[0]][u];
549	–	eqnmat[3][2] = vlist[p3i[0]][v];
550	–	eqnmat[3][3] = 1.0;
551	–	/* invert matrix (solve system) */
552	–	if (!invmat4(eqnmat, eqnmat))
553	–	return(-1); /* no solution */
554	–	/* compute result matrix */
555	–	for (j = 0; j < 4; j++)
556	–	for (i = 0; i < 3; i++)
557	–	resmat[j][i] = eqnmat[j][0]*vnlist[p0i[2]][i] +
558	–	eqnmat[j][1]*vnlist[p1i[2]][i] +
559	–	eqnmat[j][2]*vnlist[p2i[2]][i] +
560	–	eqnmat[j][3]*vnlist[p3i[2]][i];
561	–	return(ax);
562	–
563	–	#undef u
564	–	#undef v
565	–	}
566	–
567	–
568	–	freeverts() /* free all vertices */
569	–	{
681		if (nvs) {
682	<	free((char *)vlist);
682	>	free((void *)vlist);
683		nvs = 0;
684		}
685		if (nvts) {
686	<	free((char *)vtlist);
686	>	free((void *)vtlist);
687		nvts = 0;
688		}
689		if (nvns) {
690	<	free((char *)vnlist);
690	>	free((void *)vnlist);
691		nvns = 0;
692		}
693		}
694
695
696		int
697	<	newv(x, y, z) /* create a new vertex */
698	<	double x, y, z;
697	>	newv( /* create a new vertex */
698	>	double x,
699	>	double y,
700	>	double z
701	>	)
702		{
703		if (!(nvs%CHUNKSIZ)) { /* allocate next block */
704		if (nvs == 0)
705		vlist = (FVECT )malloc(CHUNKSIZsizeof(FVECT));
706		else
707	<	vlist = (FVECT )realloc((char )vlist,
707	>	vlist = (FVECT )realloc((void )vlist,
708		(nvs+CHUNKSIZ)*sizeof(FVECT));
709		if (vlist == NULL) {
710		fprintf(stderr,
#	Line 607 \| Line 721 \| double x, y, z;
721
722
723		int
724	<	newvn(x, y, z) /* create a new vertex normal */
725	<	double x, y, z;
724	>	newvn( /* create a new vertex normal */
725	>	double x,
726	>	double y,
727	>	double z
728	>	)
729		{
730		if (!(nvns%CHUNKSIZ)) { /* allocate next block */
731		if (nvns == 0)
732		vnlist = (FVECT )malloc(CHUNKSIZsizeof(FVECT));
733		else
734	<	vnlist = (FVECT )realloc((char )vnlist,
734	>	vnlist = (FVECT )realloc((void )vnlist,
735		(nvns+CHUNKSIZ)*sizeof(FVECT));
736		if (vnlist == NULL) {
737		fprintf(stderr,
#	Line 633 \| Line 750 \| double x, y, z;
750
751
752		int
753	<	newvt(x, y) /* create a new texture vertex */
754	<	double x, y;
753	>	newvt( /* create a new texture map vertex */
754	>	double x,
755	>	double y
756	>	)
757		{
758		if (!(nvts%CHUNKSIZ)) { /* allocate next block */
759		if (nvts == 0)
760	<	vtlist = (FLOAT ()[2])malloc(CHUNKSIZ2*sizeof(FLOAT));
760	>	vtlist = (RREAL ()[2])malloc(CHUNKSIZ2*sizeof(RREAL));
761		else
762	<	vtlist = (FLOAT ()[2])realloc((char )vtlist,
763	<	(nvts+CHUNKSIZ)2sizeof(FLOAT));
762	>	vtlist = (RREAL ()[2])realloc((void )vtlist,
763	>	(nvts+CHUNKSIZ)2sizeof(RREAL));
764		if (vtlist == NULL) {
765		fprintf(stderr,
766		"Out of memory while allocating texture vertex %d\n",
#	Line 649 \| Line 768 \| double x, y;
768		exit(1);
769		}
770		}
771	<	/* assign new texture vertex */
771	>	/* assign new vertex */
772		vtlist[nvts][0] = x;
773		vtlist[nvts][1] = y;
774		return(++nvts);
775		}
776
777
778	<	syntax(fn, ln, er) /* report syntax error and exit */
779	<	char *fn;
780	<	int ln;
781	<	char *er;
778	>	void
779	>	syntax( /* report syntax error and exit */
780	>	char *er
781	>	)
782		{
783		fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n",
784	<	fn, ln, er);
784	>	inpfile, lineno, er);
785		exit(1);
786		}

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Comparing ray/src/cv/obj2rad.c (file contents): Revision 2.1 by greg, Tue Apr 12 17:12:42 1994 UTC vs. Revision 2.22 by schorsch, Sat Nov 15 17:54:06 2003 UTC

Diff Legend

Comparing ray/src/cv/obj2rad.c (file contents):
Revision 2.1 by greg, Tue Apr 12 17:12:42 1994 UTC vs.
Revision 2.22 by schorsch, Sat Nov 15 17:54:06 2003 UTC