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

Comparing ray/src/cv/obj2rad.c (file contents):
Revision 2.2 by greg, Tue Apr 12 17:28:52 1994 UTC vs.
Revision 2.31 by greg, Tue Jan 28 21:18:02 2020 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.
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"
17	<
13	>	#include <stdlib.h>
14		#include <ctype.h>
15
16	<	#define VOIDID "void" /* this is defined in object.h */
16	>	#include "rtmath.h"
17	>	#include "rtio.h"
18	>	#include "resolu.h"
19	>	#include "trans.h"
20	>	#include "tmesh.h"
21
22	<	#define TCALNAME "tmesh.cal" /* triangle interp. file */
23	<	#define QCALNAME "surf.cal" /* quad interp. file */
22	>
23		#define PATNAME "M-pat" /* mesh pattern name (reused) */
24		#define TEXNAME "M-nor" /* mesh texture name (reused) */
25	+	#define DEFOBJ "unnamed" /* default object name */
26	+	#define DEFMAT "white" /* default material name */
27
28	<	#define ABS(x) ((x)>=0 ? (x) : -(x))
28	>	#define pvect(v) printf(" %18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2])
29
29	–	#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2])
30	–
30		FVECT vlist; / our vertex list */
31		int nvs; /* number of vertices in our list */
32		FVECT vnlist; / vertex normal list */
33		int nvns;
34	<	FLOAT (vtlist)[2]; / texture vertex list */
34	>	RREAL (vtlist)[2]; / map vertex list */
35		int nvts;
36
37	<	typedef FLOAT BARYCCM[3][4]; /* barycentric coordinate system */
37	>	int ndegen = 0; /* count of degenerate faces */
38	>	int n0norm = 0; /* count of zero normals */
39
40	<	typedef int VNDX[3]; /* vertex index (point,texture,normal) */
40	>	typedef int VNDX[3]; /* vertex index (point,map,normal) */
41
42	<	#define CHUNKSIZ 128 /* vertex allocation chunk size */
42	>	#define CHUNKSIZ 1024 /* vertex allocation chunk size */
43
44	<	#define MAXARG 64 /* maximum # arguments in a statement */
44	>	#define MAXARG 512 /* maximum # arguments in a statement */
45
46	<	char defmat = VOIDID; / default (starting) material name */
47	<	char defpat = ""; / default (starting) picture name */
48	<	char defobj = "F"; / default (starting) object name */
46	>	/* qualifiers */
47	>	#define Q_MTL 0
48	>	#define Q_MAP 1
49	>	#define Q_GRP 2
50	>	#define Q_OBJ 3
51	>	#define Q_FAC 4
52	>	#define NQUALS 5
53
54	<	char picfile[128]; /* current picture file */
55	<	char matname[64]; /* current material name */
56	<	char objname[128]; /* current object name */
54	>	char *qname[NQUALS] = {
55	>	"Material",
56	>	"Map",
57	>	"Group",
58	>	"Object",
59	>	"Face",
60	>	};
61	>
62	>	QLIST qlist = {NQUALS, qname};
63	>	/* valid qualifier ids */
64	>	IDLIST qual[NQUALS];
65	>	/* mapping rules */
66	>	RULEHD *ourmapping = NULL;
67	>
68	>	char defmat = DEFMAT; / default (starting) material name */
69	>	char defobj = DEFOBJ; / default (starting) object name */
70	>
71	>	int flatten = 0; /* discard surface normal information */
72	>
73	>	char mapname[256]; /* current picture file */
74	>	char matname[256]; /* current material name */
75	>	char group[8][256]; /* current group name(s) */
76	>	char objname[256]; /* current object name */
77	>	char inpfile; / input file name */
78		int lineno; /* current line number */
79	+	int faceno; /* current face number */
80
81	<	int nfaces; /* total number of faces output */
81	>	static void getnames(FILE *fp);
82	>	static void convert(FILE *fp);
83	>	static int getstmt(char av[MAXARG], FILE fp);
84	>	static char * getmtl(void);
85	>	static char * getonm(void);
86	>	static int matchrule(RULEHD *rp);
87	>	static int cvtndx(VNDX vi, char *vs);
88	>	static int nonplanar(int ac, char **av);
89	>	static int putface(int ac, char **av);
90	>	static int puttri(char v1, char v2, char *v3);
91	>	static void freeverts(void);
92	>	static int newv(double x, double y, double z);
93	>	static int newvn(double x, double y, double z);
94	>	static int newvt(double x, double y);
95	>	static void syntax(char *er);
96
97
98	<	main(argc, argv) /* read in T-mesh files and convert */
99	<	int argc;
100	<	char *argv[];
98	>	int
99	>	main( /* read in .OBJ file and convert */
100	>	int argc,
101	>	char *argv[]
102	>	)
103		{
104	<	FILE *fp;
104	>	int donames = 0;
105		int i;
106
107		for (i = 1; i < argc && argv[i][0] == '-'; i++)
#	Line 67 \| Line 109 \| *char argv[];**
109		case 'o': /* object name */
110		defobj = argv[++i];
111		break;
112	<	case 'm': /* default material */
113	<	defmat = argv[++i];
112	>	case 'n': /* just produce name list */
113	>	donames++;
114		break;
115	<	case 'p': /* default picture */
116	<	defpat = argv[++i];
115	>	case 'm': /* use custom mapfile */
116	>	ourmapping = getmapping(argv[++i], &qlist);
117		break;
118	+	case 'f': /* flatten surfaces */
119	+	flatten++;
120	+	break;
121		default:
122	<	fprintf(stderr,
78	<	"Usage: %s [-o obj][-m mat][-p pic] [file ..]\n",
79	<	argv[0]);
80	<	exit(1);
122	>	goto userr;
123		}
124	<	if (i >= argc)
125	<	convert("<stdin>", stdin);
126	<	else
127	<	for ( ; i < argc; i++) {
128	<	if ((fp = fopen(argv[i], "r")) == NULL) {
129	<	perror(argv[i]);
130	<	exit(1);
124	>	if ((i > argc) \| (i < argc-1))
125	>	goto userr;
126	>	if (i == argc)
127	>	inpfile = "<stdin>";
128	>	else if (freopen(inpfile=argv[i], "r", stdin) == NULL) {
129	>	fprintf(stderr, "%s: cannot open\n", inpfile);
130	>	exit(1);
131	>	}
132	>	if (donames) { /* scan for ids */
133	>	getnames(stdin);
134	>	printf("filename \"%s\"\n", inpfile);
135	>	printf("filetype \"Wavefront\"\n");
136	>	write_quals(&qlist, qual, stdout);
137	>	printf("qualifier %s begin\n", qlist.qual[Q_FAC]);
138	>	printf("[%d:%d]\n", 1, faceno);
139	>	printf("end\n");
140	>	} else { /* translate file */
141	>	printf("# ");
142	>	printargs(argc, argv, stdout);
143	>	convert(stdin);
144	>	}
145	>	if (ndegen)
146	>	printf("# %d degenerate faces\n", ndegen);
147	>	if (n0norm)
148	>	printf("# %d invalid (zero) normals\n", n0norm);
149	>	exit(0);
150	>	userr:
151	>	fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n",
152	>	argv[0]);
153	>	exit(1);
154	>	}
155	>
156	>
157	>	void
158	>	getnames( /* get valid qualifier names */
159	>	FILE *fp
160	>	)
161	>	{
162	>	char *argv[MAXARG];
163	>	int argc;
164	>	ID tmpid;
165	>	int i;
166	>
167	>	while ( (argc = getstmt(argv, fp)) )
168	>	switch (argv[0][0]) {
169	>	case 'f': /* face */
170	>	if (!argv[0][1])
171	>	faceno++;
172	>	break;
173	>	case 'u':
174	>	if (!strcmp(argv[0], "usemtl")) { /* material */
175	>	if (argc < 2)
176	>	break; /* not fatal */
177	>	tmpid.number = 0;
178	>	tmpid.name = argv[1];
179	>	findid(&qual[Q_MTL], &tmpid, 1);
180	>	} else if (!strcmp(argv[0], "usemap")) {/* map */
181	>	if (argc < 2 \|\| !strcmp(argv[1], "off"))
182	>	break; /* not fatal */
183	>	tmpid.number = 0;
184	>	tmpid.name = argv[1];
185	>	findid(&qual[Q_MAP], &tmpid, 1);
186		}
187	<	convert(argv[i], fp);
188	<	fclose(fp);
187	>	break;
188	>	case 'o': /* object name */
189	>	if (argv[0][1] \|\| argc < 2)
190	>	break;
191	>	tmpid.number = 0;
192	>	tmpid.name = argv[1];
193	>	findid(&qual[Q_OBJ], &tmpid, 1);
194	>	break;
195	>	case 'g': /* group name(s) */
196	>	if (argv[0][1])
197	>	break;
198	>	tmpid.number = 0;
199	>	for (i = 1; i < argc; i++) {
200	>	tmpid.name = argv[i];
201	>	findid(&qual[Q_GRP], &tmpid, 1);
202	>	}
203	>	break;
204		}
93	–	exit(0);
205		}
206
207
208	<	convert(fname, fp) /* convert a T-mesh */
209	<	char *fname;
210	<	FILE *fp;
208	>	void
209	>	convert( /* convert an OBJ stream */
210	>	FILE *fp
211	>	)
212		{
213		char *argv[MAXARG];
214		int argc;
215		int nstats, nunknown;
216	<	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;
216	>	int i;
217
218	<	printf("\n# Wavefront file read from: %s\n", fname);
218	>	nstats = nunknown = 0;
219		/* scan until EOF */
220	<	while (argc = getstmt(argv, fp)) {
220	>	while ( (argc = getstmt(argv, fp)) ) {
221		switch (argv[0][0]) {
222		case 'v': /* vertex */
223		switch (argv[0][1]) {
224		case '\0': /* point */
225		if (badarg(argc-1,argv+1,"fff"))
226	<	syntax(fname, lineno, "Bad vertex");
226	>	syntax("Bad vertex");
227		newv(atof(argv[1]), atof(argv[2]),
228		atof(argv[3]));
229		break;
#	Line 126 \| Line 231 \| *FILE fp;**
231		if (argv[0][2])
232		goto unknown;
233		if (badarg(argc-1,argv+1,"fff"))
234	<	syntax(fname, lineno, "Bad normal");
234	>	syntax("Bad normal");
235		if (!newvn(atof(argv[1]), atof(argv[2]),
236		atof(argv[3])))
237	<	syntax(fname, lineno, "Zero normal");
237	>	syntax("Zero normal");
238		break;
239	<	case 't': /* texture */
239	>	case 't': /* texture map */
240		if (argv[0][2])
241		goto unknown;
242		if (badarg(argc-1,argv+1,"ff"))
#	Line 145 \| Line 250 \| *FILE fp;**
250		case 'f': /* face */
251		if (argv[0][1])
252		goto unknown;
253	+	faceno++;
254		switch (argc-1) {
255		case 0: case 1: case 2:
256	<	syntax(fname, lineno, "Too few vertices");
256	>	syntax("Too few vertices");
257		break;
258		case 3:
259		if (!puttri(argv[1], argv[2], argv[3]))
260	<	syntax(fname, lineno, "Bad triangle");
260	>	syntax("Bad triangle");
261		break;
156	–	case 4:
157	–	if (!putquad(argv[1], argv[2],
158	–	argv[3], argv[4]))
159	–	syntax(fname, lineno, "Bad quad");
160	–	break;
262		default:
263		if (!putface(argc-1, argv+1))
264	<	syntax(fname, lineno, "Bad face");
264	>	syntax("Bad face");
265		break;
266		}
267		break;
#	Line 173 \| Line 274 \| *FILE fp;**
274		if (argc < 2)
275		break; /* not fatal */
276		if (!strcmp(argv[1], "off"))
277	<	picfile[0] = '\0';
277	>	mapname[0] = '\0';
278		else
279	<	strcpy(picfile, argv[1]);
279	>	sprintf(mapname, "%s.hdr", argv[1]);
280		} else
281		goto unknown;
282		break;
#	Line 189 \| Line 290 \| *FILE fp;**
290		case 'g': /* group name(s) */
291		if (argv[0][1])
292		goto unknown;
192	–	if (argc < 2)
193	–	break; /* not fatal */
194	–	objname[0] = '\0';
293		for (i = 1; i < argc; i++)
294	<	if (objname[0])
295	<	sprintf(objname+strlen(objname),
198	<	".%s", argv[i]);
199	<	else
200	<	strcpy(objname, argv[i]);
294	>	strcpy(group[i-1], argv[i]);
295	>	group[argc-1][0] = '\0';
296		break;
297		case '#': /* comment */
298	+	printargs(argc, argv, stdout);
299		break;
300		default:; /* something we don't deal with */
301		unknown:
#	Line 208 \| Line 304 \| *FILE fp;**
304		}
305		nstats++;
306		}
307	<	printf("\n# Done processing file: %s\n", fname);
307	>	printf("\n# Done processing file: %s\n", inpfile);
308		printf("# %d lines, %d statements, %d unrecognized\n",
309		lineno, nstats, nunknown);
310		}
311
312
313		int
314	<	getstmt(av, fp) /* read the next statement from fp */
315	<	register char *av[MAXARG];
316	<	FILE *fp;
314	>	getstmt( /* read the next statement from fp */
315	>	char *av[MAXARG],
316	>	FILE *fp
317	>	)
318		{
319	<	extern char *fgetline();
320	<	static char sbuf[MAXARG*10];
321	<	register char *cp;
225	<	register int i;
319	>	static char sbuf[MAXARG*16];
320	>	char *cp;
321	>	int i;
322
323		do {
324		if (fgetline(cp=sbuf, sizeof(sbuf), fp) == NULL)
#	Line 234 \| Line 330 \| *FILE fp;**
330		lineno++;
331		*cp++ = '\0';
332		}
333	<	if (!*cp \|\| i >= MAXARG-1)
333	>	if (!*cp)
334		break;
335	+	if (i >= MAXARG-1) {
336	+	fprintf(stderr,
337	+	"warning: line %d: too many arguments (limit %d)\n",
338	+	lineno+1, MAXARG-1);
339	+	break;
340	+	}
341		av[i++] = cp;
342		while (++cp && !isspace(cp))
343		;
#	Line 246 \| Line 348 \| *FILE fp;**
348
349		return(i);
350		}
249	–
351
352	<	cvtndx(vi, vs) /* convert vertex string to index */
353	<	register VNDX vi;
354	<	register char *vs;
352	>
353	>	char *
354	>	getmtl(void) /* figure material for this face */
355		{
356	+	RULEHD *rp = ourmapping;
357	+
358	+	if (rp == NULL) { /* no rule set */
359	+	if (matname[0])
360	+	return(matname);
361	+	if (group[0][0])
362	+	return(group[0]);
363	+	return(defmat);
364	+	}
365	+	/* check for match */
366	+	do {
367	+	if (matchrule(rp)) {
368	+	if (!strcmp(rp->mnam, VOIDID))
369	+	return(NULL); /* match is null */
370	+	return(rp->mnam);
371	+	}
372	+	rp = rp->next;
373	+	} while (rp != NULL);
374	+	/* no match found */
375	+	return(NULL);
376	+	}
377	+
378	+
379	+	char *
380	+	getonm(void) /* invent a good name for object */
381	+	{
382	+	static char name[64];
383	+	char cp1, cp2;
384	+	int i;
385	+	/* check for preset */
386	+	if (objname[0])
387	+	return(objname);
388	+	if (!group[0][0])
389	+	return(defobj);
390	+	cp1 = name; /* else make name out of groups */
391	+	for (i = 0; group[i][0]; i++) {
392	+	cp2 = group[i];
393	+	if (cp1 > name)
394	+	*cp1++ = '.';
395	+	while ( (cp1 = cp2++) )
396	+	if (++cp1 >= name+sizeof(name)-2) {
397	+	*cp1 = '\0';
398	+	return(name);
399	+	}
400	+	}
401	+	return(name);
402	+	}
403	+
404	+
405	+	int
406	+	matchrule( /* check for a match on this rule */
407	+	RULEHD *rp
408	+	)
409	+	{
410	+	ID tmpid;
411	+	int gotmatch;
412	+	int i;
413	+
414	+	if (rp->qflg & FL(Q_MTL)) {
415	+	if (!matname[0])
416	+	return(0);
417	+	tmpid.number = 0;
418	+	tmpid.name = matname;
419	+	if (!matchid(&tmpid, &idm(rp)[Q_MTL]))
420	+	return(0);
421	+	}
422	+	if (rp->qflg & FL(Q_MAP)) {
423	+	if (!mapname[0])
424	+	return(0);
425	+	tmpid.number = 0;
426	+	tmpid.name = mapname;
427	+	if (!matchid(&tmpid, &idm(rp)[Q_MAP]))
428	+	return(0);
429	+	}
430	+	if (rp->qflg & FL(Q_GRP)) {
431	+	tmpid.number = 0;
432	+	gotmatch = 0;
433	+	for (i = 0; group[i][0]; i++) {
434	+	tmpid.name = group[i];
435	+	gotmatch \|= matchid(&tmpid, &idm(rp)[Q_GRP]);
436	+	}
437	+	if (!gotmatch)
438	+	return(0);
439	+	}
440	+	if (rp->qflg & FL(Q_OBJ)) {
441	+	if (!objname[0])
442	+	return(0);
443	+	tmpid.number = 0;
444	+	tmpid.name = objname;
445	+	if (!matchid(&tmpid, &idm(rp)[Q_OBJ]))
446	+	return(0);
447	+	}
448	+	if (rp->qflg & FL(Q_FAC)) {
449	+	tmpid.name = NULL;
450	+	tmpid.number = faceno;
451	+	if (!matchid(&tmpid, &idm(rp)[Q_FAC]))
452	+	return(0);
453	+	}
454	+	return(1);
455	+	}
456	+
457	+
458	+	int
459	+	cvtndx( /* convert vertex string to index */
460	+	VNDX vi,
461	+	char *vs
462	+	)
463	+	{
464		/* get point */
465		vi[0] = atoi(vs);
466		if (vi[0] > 0) {
467		if (vi[0]-- > nvs)
468		return(0);
469		} else if (vi[0] < 0) {
470	<	vi[0] = nvs + vi[0];
470	>	vi[0] += nvs;
471		if (vi[0] < 0)
472		return(0);
473		} else
474		return(0);
475	<	/* get texture */
475	>	/* get map */
476		while (*vs)
477		if (*vs++ == '/')
478		break;
#	Line 272 \| Line 481 \| *register char vs;**
481		if (vi[1]-- > nvts)
482		return(0);
483		} else if (vi[1] < 0) {
484	<	vi[1] = nvts + vi[1];
484	>	vi[1] += nvts;
485		if (vi[1] < 0)
486		return(0);
487		} else
#	Line 286 \| Line 495 \| *register char vs;**
495		if (vi[2]-- > nvns)
496		return(0);
497		} else if (vi[2] < 0) {
498	<	vi[2] = nvns + vi[2];
498	>	vi[2] += nvns;
499		if (vi[2] < 0)
500		return(0);
501		} else
502		vi[2] = -1;
503	+	/* zero normal is not normal */
504	+	if (vi[2] >= 0 && DOT(vnlist[vi[2]],vnlist[vi[2]]) <= FTINY)
505	+	vi[2] = -1;
506		return(1);
507		}
508
509
510	<	putface(ac, av) /* put out an N-sided polygon */
511	<	register int ac;
512	<	register char **av;
510	>	int
511	>	nonplanar( /* are vertices non-planar? */
512	>	int ac,
513	>	char **av
514	>	)
515		{
516		VNDX vi;
517	+	RREAL p0, p1;
518	+	FVECT v1, v2, nsum, newn;
519	+	double d;
520	+	int i;
521
522	<	printf("\n%s polygon %s.%d\n", matname, objname, ++nfaces);
522	>	if (!cvtndx(vi, av[0]))
523	>	return(0);
524	>	if (!flatten && vi[2] >= 0)
525	>	return(1); /* has interpolated normals */
526	>	if (ac < 4)
527	>	return(0); /* it's a triangle! */
528	>	/* set up */
529	>	p0 = vlist[vi[0]];
530	>	if (!cvtndx(vi, av[1]))
531	>	return(0); /* error gets caught later */
532	>	nsum[0] = nsum[1] = nsum[2] = 0.;
533	>	p1 = vlist[vi[0]];
534	>	fvsum(v2, p1, p0, -1.0);
535	>	for (i = 2; i < ac; i++) {
536	>	VCOPY(v1, v2);
537	>	if (!cvtndx(vi, av[i]))
538	>	return(0);
539	>	p1 = vlist[vi[0]];
540	>	fvsum(v2, p1, p0, -1.0);
541	>	fcross(newn, v1, v2);
542	>	if (normalize(newn) == 0.0) {
543	>	if (i < 3)
544	>	return(1); /* can't deal with this */
545	>	fvsum(nsum, nsum, nsum, 1./(i-2));
546	>	continue;
547	>	}
548	>	d = fdot(newn,nsum);
549	>	if (d >= 0) {
550	>	if (d < (1.0-FTINY)*(i-2))
551	>	return(1);
552	>	fvsum(nsum, nsum, newn, 1.0);
553	>	} else {
554	>	if (d > -(1.0-FTINY)*(i-2))
555	>	return(1);
556	>	fvsum(nsum, nsum, newn, -1.0);
557	>	}
558	>	}
559	>	return(0);
560	>	}
561	>
562	>
563	>	int
564	>	putface( /* put out an N-sided polygon */
565	>	int ac,
566	>	char **av
567	>	)
568	>	{
569	>	VNDX vi;
570	>	char *cp;
571	>	int i;
572	>
573	>	if (nonplanar(ac, av)) { /* break into triangles */
574	>	while (ac > 2) {
575	>	if (!puttri(av[0], av[1], av[2]))
576	>	return(0);
577	>	ac--; /* remove vertex & rotate */
578	>	cp = av[0];
579	>	for (i = 0; i < ac-1; i++)
580	>	av[i] = av[i+2];
581	>	av[i] = cp;
582	>	}
583	>	return(1);
584	>	}
585	>	if ((cp = getmtl()) == NULL)
586	>	return(-1);
587	>	printf("\n%s polygon %s.%d\n", cp, getonm(), faceno);
588		printf("0\n0\n%d\n", 3*ac);
589	<	while (ac--) {
590	<	if (!cvtndx(vi, *av++))
589	>	for (i = 0; i < ac; i++) {
590	>	if (!cvtndx(vi, av[i]))
591		return(0);
592		pvect(vlist[vi[0]]);
593		}
#	Line 312 \| Line 595 \| register char av;**
595		}
596
597
598	<	puttri(v1, v2, v3) /* put out a triangle */
599	<	char v1, v2, *v3;
598	>	int
599	>	puttri( /* put out a triangle */
600	>	char *v1,
601	>	char *v2,
602	>	char *v3
603	>	)
604		{
605	<	char *mod = matname;
605	>	char *mod;
606		VNDX v1i, v2i, v3i;
607		BARYCCM bvecs;
608	<	int texOK, patOK;
608	>	RREAL bcoor[3][3];
609	>	int texOK = 0, patOK;
610	>	int flatness;
611	>	int i;
612
613	+	if ((mod = getmtl()) == NULL)
614	+	return(-1);
615	+
616		if (!cvtndx(v1i, v1) \|\| !cvtndx(v2i, v2) \|\| !cvtndx(v3i, v3))
617		return(0);
618		/* compute barycentric coordinates */
619	<	texOK = (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0);
620	<	patOK = picfile[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0);
619	>	if (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0)
620	>	flatness = flat_tri(vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]],
621	>	vnlist[v1i[2]], vnlist[v2i[2]], vnlist[v3i[2]]);
622	>	else
623	>	flatness = ISFLAT;
624	>
625	>	switch (flatness) {
626	>	case DEGEN: /* zero area */
627	>	ndegen++;
628	>	return(-1);
629	>	case RVFLAT: /* reversed normals, but flat */
630	>	case ISFLAT: /* smoothing unnecessary */
631	>	texOK = 0;
632	>	break;
633	>	case RVBENT: /* reversed normals with smoothing */
634	>	case ISBENT: /* proper smoothing */
635	>	texOK = 1;
636	>	break;
637	>	}
638	>	if (flatten)
639	>	texOK = 0;
640	>	#ifdef TEXMAPS
641	>	patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0);
642	>	#else
643	>	patOK = 0;
644	>	#endif
645		if (texOK \| patOK)
646	<	if (comp_baryc(bvecs, vlist[v1i[0]], vlist[v2i[0]],
646	>	if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]],
647		vlist[v3i[0]]) < 0)
648	<	return(-1);
648	>	texOK = patOK = 0;
649		/* put out texture (if any) */
650		if (texOK) {
651		printf("\n%s texfunc %s\n", mod, TEXNAME);
652		mod = TEXNAME;
653		printf("4 dx dy dz %s\n", TCALNAME);
654	<	printf("0\n21\n");
655	<	put_baryc(bvecs);
656	<	printf("\t%14.12g %14.12g %14.12g\n",
657	<	vnlist[v1i[2]][0], vnlist[v2i[2]][0],
658	<	vnlist[v3i[2]][0]);
659	<	printf("\t%14.12g %14.12g %14.12g\n",
660	<	vnlist[v1i[2]][1], vnlist[v2i[2]][1],
344	<	vnlist[v3i[2]][1]);
345	<	printf("\t%14.12g %14.12g %14.12g\n",
346	<	vnlist[v1i[2]][2], vnlist[v2i[2]][2],
347	<	vnlist[v3i[2]][2]);
654	>	printf("0\n");
655	>	for (i = 0; i < 3; i++) {
656	>	bcoor[i][0] = vnlist[v1i[2]][i];
657	>	bcoor[i][1] = vnlist[v2i[2]][i];
658	>	bcoor[i][2] = vnlist[v3i[2]][i];
659	>	}
660	>	put_baryc(&bvecs, bcoor, 3);
661		}
662	+	#ifdef TEXMAPS
663		/* put out pattern (if any) */
664		if (patOK) {
665		printf("\n%s colorpict %s\n", mod, PATNAME);
666		mod = PATNAME;
667	<	printf("7 noneg noneg noneg %s %s u v\n", picfile, TCALNAME);
668	<	printf("0\n18\n");
669	<	put_baryc(bvecs);
670	<	printf("\t%f %f %f\n", vtlist[v1i[1]][0],
671	<	vtlist[v2i[1]][0], vtlist[v3i[1]][0]);
672	<	printf("\t%f %f %f\n", vtlist[v1i[1]][1],
673	<	vtlist[v2i[1]][1], vtlist[v3i[1]][1]);
667	>	printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME);
668	>	printf("0\n");
669	>	for (i = 0; i < 2; i++) {
670	>	bcoor[i][0] = vtlist[v1i[1]][i];
671	>	bcoor[i][1] = vtlist[v2i[1]][i];
672	>	bcoor[i][2] = vtlist[v3i[1]][i];
673	>	}
674	>	put_baryc(&bvecs, bcoor, 2);
675		}
676	<	/* put out triangle */
677	<	printf("\n%s polygon %s.%d\n", mod, objname, ++nfaces);
676	>	#endif
677	>	/* put out (reversed) triangle */
678	>	printf("\n%s polygon %s.%d\n", mod, getonm(), faceno);
679		printf("0\n0\n9\n");
680	<	pvect(vlist[v1i[0]]);
681	<	pvect(vlist[v2i[0]]);
682	<	pvect(vlist[v3i[0]]);
683	<
684	<	return(1);
685	<	}
686	<
687	<
372	<	int
373	<	comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */
374	<	register BARYCCM bcm;
375	<	FLOAT v1, v2, *v3;
376	<	{
377	<	FLOAT *vt;
378	<	FVECT va, vab, vcb;
379	<	double d;
380	<	register int i, j;
381	<
382	<	for (j = 0; j < 3; j++) {
383	<	for (i = 0; i < 3; i++) {
384	<	vab[i] = v1[i] - v2[i];
385	<	vcb[i] = v3[i] - v2[i];
386	<	}
387	<	d = DOT(vcb,vcb);
388	<	if (d <= FTINY)
389	<	return(-1);
390	<	d = DOT(vcb,vab)/d;
391	<	for (i = 0; i < 3; i++)
392	<	va[i] = vab[i] - vcb[i]*d;
393	<	d = DOT(va,va);
394	<	if (d <= FTINY)
395	<	return(-1);
396	<	for (i = 0; i < 3; i++) {
397	<	va[i] /= d;
398	<	bcm[j][i] = va[i];
399	<	}
400	<	bcm[j][3] = -DOT(v2,va);
401	<	/* rotate vertices */
402	<	vt = v1;
403	<	v1 = v2;
404	<	v2 = v3;
405	<	v3 = vt;
680	>	if (flatness == RVFLAT \|\| flatness == RVBENT) {
681	>	pvect(vlist[v3i[0]]);
682	>	pvect(vlist[v2i[0]]);
683	>	pvect(vlist[v1i[0]]);
684	>	} else {
685	>	pvect(vlist[v1i[0]]);
686	>	pvect(vlist[v2i[0]]);
687	>	pvect(vlist[v3i[0]]);
688		}
407	–	return(0);
408	–	}
409	–
410	–
411	–	put_baryc(bcm) /* put barycentric coord. vectors */
412	–	register BARYCCM bcm;
413	–	{
414	–	register int i;
415	–
416	–	for (i = 0; i < 3; i++)
417	–	printf("%14.8f %14.8f %14.8f %14.8f\n",
418	–	bcm[i][0], bcm[i][1], bcm[i][2], bcm[i][3]);
419	–	}
420	–
421	–
422	–	putquad(p0, p1, p2, p3) /* put out a quadrilateral */
423	–	char p0, p1, p2, p3;
424	–	{
425	–	VNDX p0i, p1i, p2i, p3i;
426	–	FVECT norm[4];
427	–	int axis;
428	–	FVECT v1, v2, vc1, vc2;
429	–	int ok1, ok2;
430	–	/* get actual indices */
431	–	if (!cvtndx(p0i,p0) \|\| !cvtndx(p1i,p1) \|\|
432	–	!cvtndx(p2i,p2) \|\| !cvtndx(p3i,p3))
433	–	return(0);
434	–	/* compute exact normals */
435	–	fvsum(v1, vlist[p1i[0]], vlist[p0i[0]], -1.0);
436	–	fvsum(v2, vlist[p2i[0]], vlist[p0i[0]], -1.0);
437	–	fcross(vc1, v1, v2);
438	–	ok1 = normalize(vc1) != 0.0;
439	–	fvsum(v1, vlist[p2i[0]], vlist[p3i[0]], -1.0);
440	–	fvsum(v2, vlist[p1i[0]], vlist[p3i[0]], -1.0);
441	–	fcross(vc2, v1, v2);
442	–	ok2 = normalize(vc2) != 0.0;
443	–	if (!(ok1 \| ok2))
444	–	return(-1);
445	–	/* compute normal interpolation */
446	–	axis = norminterp(norm, p0i, p1i, p2i, p3i);
447	–
448	–	/* put out quadrilateral? */
449	–	if (ok1 & ok2 && fdot(vc1,vc2) >= 1.0-FTINY*FTINY) {
450	–	printf("\n%s ", matname);
451	–	if (axis != -1) {
452	–	printf("texfunc %s\n", TEXNAME);
453	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
454	–	printf("0\n13\t%d\n", axis);
455	–	pvect(norm[0]);
456	–	pvect(norm[1]);
457	–	pvect(norm[2]);
458	–	fvsum(v1, norm[3], vc1, -0.5);
459	–	fvsum(v1, v1, vc2, -0.5);
460	–	pvect(v1);
461	–	printf("\n%s ", TEXNAME);
462	–	}
463	–	printf("polygon %s.%d\n", objname, ++nfaces);
464	–	printf("0\n0\n12\n");
465	–	pvect(vlist[p0i[0]]);
466	–	pvect(vlist[p1i[0]]);
467	–	pvect(vlist[p3i[0]]);
468	–	pvect(vlist[p2i[0]]);
469	–	return(1);
470	–	}
471	–	/* put out triangles? */
472	–	if (ok1) {
473	–	printf("\n%s ", matname);
474	–	if (axis != -1) {
475	–	printf("texfunc %s\n", TEXNAME);
476	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
477	–	printf("0\n13\t%d\n", axis);
478	–	pvect(norm[0]);
479	–	pvect(norm[1]);
480	–	pvect(norm[2]);
481	–	fvsum(v1, norm[3], vc1, -1.0);
482	–	pvect(v1);
483	–	printf("\n%s ", TEXNAME);
484	–	}
485	–	printf("polygon %s.%d\n", objname, ++nfaces);
486	–	printf("0\n0\n9\n");
487	–	pvect(vlist[p0i[0]]);
488	–	pvect(vlist[p1i[0]]);
489	–	pvect(vlist[p2i[0]]);
490	–	}
491	–	if (ok2) {
492	–	printf("\n%s ", matname);
493	–	if (axis != -1) {
494	–	printf("texfunc %s\n", TEXNAME);
495	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
496	–	printf("0\n13\t%d\n", axis);
497	–	pvect(norm[0]);
498	–	pvect(norm[1]);
499	–	pvect(norm[2]);
500	–	fvsum(v2, norm[3], vc2, -1.0);
501	–	pvect(v2);
502	–	printf("\n%s ", TEXNAME);
503	–	}
504	–	printf("polygon %s.%d\n", objname, ++nfaces);
505	–	printf("0\n0\n9\n");
506	–	pvect(vlist[p2i[0]]);
507	–	pvect(vlist[p1i[0]]);
508	–	pvect(vlist[p3i[0]]);
509	–	}
689		return(1);
690		}
691
692
693	<	int
694	<	norminterp(resmat, p0i, p1i, p2i, p3i) /* compute normal interpolation */
516	<	register FVECT resmat[4];
517	<	register VNDX p0i, p1i, p2i, p3i;
693	>	void
694	>	freeverts(void) /* free all vertices */
695		{
519	–	#define u ((ax+1)%3)
520	–	#define v ((ax+2)%3)
521	–
522	–	register int ax;
523	–	MAT4 eqnmat;
524	–	FVECT v1;
525	–	register int i, j;
526	–
527	–	if (!(p0i[2]>=0 && p1i[2]>=0 && p2i[2]>=0 && p3i[2]>=0))
528	–	return(-1);
529	–	/* find dominant axis */
530	–	VCOPY(v1, vnlist[p0i[2]]);
531	–	fvsum(v1, v1, vnlist[p1i[2]], 1.0);
532	–	fvsum(v1, v1, vnlist[p2i[2]], 1.0);
533	–	fvsum(v1, v1, vnlist[p3i[2]], 1.0);
534	–	ax = ABS(v1[0]) > ABS(v1[1]) ? 0 : 1;
535	–	ax = ABS(v1[ax]) > ABS(v1[2]) ? ax : 2;
536	–	/* assign equation matrix */
537	–	eqnmat[0][0] = vlist[p0i[0]][u]*vlist[p0i[0]][v];
538	–	eqnmat[0][1] = vlist[p0i[0]][u];
539	–	eqnmat[0][2] = vlist[p0i[0]][v];
540	–	eqnmat[0][3] = 1.0;
541	–	eqnmat[1][0] = vlist[p1i[0]][u]*vlist[p1i[0]][v];
542	–	eqnmat[1][1] = vlist[p1i[0]][u];
543	–	eqnmat[1][2] = vlist[p1i[0]][v];
544	–	eqnmat[1][3] = 1.0;
545	–	eqnmat[2][0] = vlist[p2i[0]][u]*vlist[p2i[0]][v];
546	–	eqnmat[2][1] = vlist[p2i[0]][u];
547	–	eqnmat[2][2] = vlist[p2i[0]][v];
548	–	eqnmat[2][3] = 1.0;
549	–	eqnmat[3][0] = vlist[p3i[0]][u]*vlist[p3i[0]][v];
550	–	eqnmat[3][1] = vlist[p3i[0]][u];
551	–	eqnmat[3][2] = vlist[p3i[0]][v];
552	–	eqnmat[3][3] = 1.0;
553	–	/* invert matrix (solve system) */
554	–	if (!invmat4(eqnmat, eqnmat))
555	–	return(-1); /* no solution */
556	–	/* compute result matrix */
557	–	for (j = 0; j < 4; j++)
558	–	for (i = 0; i < 3; i++)
559	–	resmat[j][i] = eqnmat[j][0]*vnlist[p0i[2]][i] +
560	–	eqnmat[j][1]*vnlist[p1i[2]][i] +
561	–	eqnmat[j][2]*vnlist[p2i[2]][i] +
562	–	eqnmat[j][3]*vnlist[p3i[2]][i];
563	–	return(ax);
564	–
565	–	#undef u
566	–	#undef v
567	–	}
568	–
569	–
570	–	freeverts() /* free all vertices */
571	–	{
696		if (nvs) {
697	<	free((char *)vlist);
697	>	free((void *)vlist);
698		nvs = 0;
699		}
700		if (nvts) {
701	<	free((char *)vtlist);
701	>	free((void *)vtlist);
702		nvts = 0;
703		}
704		if (nvns) {
705	<	free((char *)vnlist);
705	>	free((void *)vnlist);
706		nvns = 0;
707		}
708		}
709
710
711		int
712	<	newv(x, y, z) /* create a new vertex */
713	<	double x, y, z;
712	>	newv( /* create a new vertex */
713	>	double x,
714	>	double y,
715	>	double z
716	>	)
717		{
718		if (!(nvs%CHUNKSIZ)) { /* allocate next block */
719		if (nvs == 0)
720		vlist = (FVECT )malloc(CHUNKSIZsizeof(FVECT));
721		else
722	<	vlist = (FVECT )realloc((char )vlist,
722	>	vlist = (FVECT )realloc((void )vlist,
723		(nvs+CHUNKSIZ)*sizeof(FVECT));
724		if (vlist == NULL) {
725		fprintf(stderr,
#	Line 609 \| Line 736 \| double x, y, z;
736
737
738		int
739	<	newvn(x, y, z) /* create a new vertex normal */
740	<	double x, y, z;
739	>	newvn( /* create a new vertex normal */
740	>	double x,
741	>	double y,
742	>	double z
743	>	)
744		{
745		if (!(nvns%CHUNKSIZ)) { /* allocate next block */
746		if (nvns == 0)
747		vnlist = (FVECT )malloc(CHUNKSIZsizeof(FVECT));
748		else
749	<	vnlist = (FVECT )realloc((char )vnlist,
749	>	vnlist = (FVECT )realloc((void )vnlist,
750		(nvns+CHUNKSIZ)*sizeof(FVECT));
751		if (vnlist == NULL) {
752		fprintf(stderr,
#	Line 628 \| Line 758 \| double x, y, z;
758		vnlist[nvns][0] = x;
759		vnlist[nvns][1] = y;
760		vnlist[nvns][2] = z;
761	<	if (normalize(vnlist[nvns]) == 0.0)
632	<	return(0);
761	>	n0norm += (normalize(vnlist[nvns]) == 0.0);
762		return(++nvns);
763		}
764
765
766		int
767	<	newvt(x, y) /* create a new texture vertex */
768	<	double x, y;
767	>	newvt( /* create a new texture map vertex */
768	>	double x,
769	>	double y
770	>	)
771		{
772		if (!(nvts%CHUNKSIZ)) { /* allocate next block */
773		if (nvts == 0)
774	<	vtlist = (FLOAT ()[2])malloc(CHUNKSIZ2*sizeof(FLOAT));
774	>	vtlist = (RREAL ()[2])malloc(CHUNKSIZ2*sizeof(RREAL));
775		else
776	<	vtlist = (FLOAT ()[2])realloc((char )vtlist,
777	<	(nvts+CHUNKSIZ)2sizeof(FLOAT));
776	>	vtlist = (RREAL ()[2])realloc((void )vtlist,
777	>	(nvts+CHUNKSIZ)2sizeof(RREAL));
778		if (vtlist == NULL) {
779		fprintf(stderr,
780		"Out of memory while allocating texture vertex %d\n",
#	Line 651 \| Line 782 \| double x, y;
782		exit(1);
783		}
784		}
785	<	/* assign new texture vertex */
785	>	/* assign new vertex */
786		vtlist[nvts][0] = x;
787		vtlist[nvts][1] = y;
788		return(++nvts);
789		}
790
791
792	<	syntax(fn, ln, er) /* report syntax error and exit */
793	<	char *fn;
794	<	int ln;
795	<	char *er;
792	>	void
793	>	syntax( /* report syntax error and exit */
794	>	char *er
795	>	)
796		{
797		fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n",
798	<	fn, ln, er);
798	>	inpfile, lineno, er);
799		exit(1);
800		}

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing ray/src/cv/obj2rad.c (file contents): Revision 2.2 by greg, Tue Apr 12 17:28:52 1994 UTC vs. Revision 2.31 by greg, Tue Jan 28 21:18:02 2020 UTC

Diff Legend

Comparing ray/src/cv/obj2rad.c (file contents):
Revision 2.2 by greg, Tue Apr 12 17:28:52 1994 UTC vs.
Revision 2.31 by greg, Tue Jan 28 21:18:02 2020 UTC