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

Comparing ray/src/cv/obj2rad.c (file contents):
Revision 2.5 by greg, Wed Apr 13 17:24:24 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. 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.
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"
21	+	#include "tmesh.h"
22
20	–	#include <ctype.h>
23
22	–	#define TCALNAME "tmesh.cal" /* triangle interp. file */
23	–	#define QCALNAME "surf.cal" /* quad interp. file */
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
29	–	#define ABS(x) ((x)>=0 ? (x) : -(x))
30	–
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]; / map vertex list */
35	>	RREAL (vtlist)[2]; / map vertex list */
36		int nvts;
37
40	–	typedef FLOAT BARYCCM[3][4]; /* barycentric coordinate system */
41	–
38		typedef int VNDX[3]; /* vertex index (point,map,normal) */
39
40		#define CHUNKSIZ 256 /* vertex allocation chunk size */
#	Line 69 \| Line 65 \| *RULEHD ourmapping = NULL;**
65
66		char defmat = DEFMAT; / default (starting) material name */
67		char defobj = DEFOBJ; / default (starting) object name */
72	–	int donames = 0; /* only get qualifier names */
68
69	<	char getmtl(), getonm();
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; /* number of faces read */
77	>	int faceno; /* current face number */
78
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	<	main(argc, argv) /* read in .obj file and convert */
96	<	int argc;
97	<	char *argv[];
95	>
96	>	int
97	>	main( /* read in .obj file and convert */
98	>	int argc,
99	>	char *argv[]
100	>	)
101		{
102	<	char *fname;
102	>	int donames = 0;
103		int i;
104
105		for (i = 1; i < argc && argv[i][0] == '-'; i++)
#	Line 99 \| Line 113 \| *char argv[];**
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		goto userr;
121		}
122	<	if (i > argc \| i < argc-1)
122	>	if ((i > argc) \| (i < argc-1))
123		goto userr;
124		if (i == argc)
125	<	fname = "<stdin>";
126	<	else if (freopen(fname=argv[i], "r", stdin) == NULL) {
127	<	fprintf(stderr, "%s: cannot open\n", fname);
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", fname);
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]);
#	Line 121 \| Line 138 \| *char argv[];**
138		} else { /* translate file */
139		printf("# ");
140		printargs(argc, argv, stdout);
141	<	convert(fname, stdin);
141	>	convert(stdin);
142		}
143		exit(0);
144		userr:
145	<	fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n] [file.obj]\n",
145	>	fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n",
146		argv[0]);
147		exit(1);
148		}
149
150
151	<	getnames(fp) /* get valid qualifier names */
152	<	FILE *fp;
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))
161	>	while ( (argc = getstmt(argv, fp)) )
162		switch (argv[0][0]) {
163		case 'f': /* face */
164		if (!argv[0][1])
#	Line 180 \| Line 199 \| *FILE fp;**
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;
211	<	/* start fresh */
192	<	freeverts();
193	<	mapname[0] = '\0';
194	<	strcpy(matname, defmat);
195	<	strcpy(objname, defobj);
196	<	lineno = 0;
211	>
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 210 \| 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 map */
234		if (argv[0][2])
#	Line 232 \| Line 247 \| *FILE fp;**
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;
241	–	case 4:
242	–	if (!putquad(argv[1], argv[2],
243	–	argv[3], argv[4]))
244	–	syntax(fname, lineno, "Bad quad");
245	–	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 260 \| Line 270 \| *FILE fp;**
270		if (!strcmp(argv[1], "off"))
271		mapname[0] = '\0';
272		else
273	<	strcpy(mapname, argv[1]);
273	>	sprintf(mapname, "%s.pic", argv[1]);
274		} else
275		goto unknown;
276		break;
#	Line 279 \| Line 289 \| *FILE fp;**
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 287 \| Line 298 \| *FILE fp;**
298		}
299		nstats++;
300		}
301	<	printf("\n# 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 328 \| Line 340 \| *FILE fp;**
340
341
342		char *
343	<	getmtl() /* figure material for this face */
343	>	getmtl(void) /* figure material for this face */
344		{
345		register RULEHD *rp = ourmapping;
346
347	<	if (rp == NULL) /* no rule set */
348	<	return(matname);
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)) {
#	Line 349 \| Line 366 \| *getmtl() / figure material for this face /*
366
367
368		char *
369	<	getonm() /* invent a good name for object */
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	<
375	<	if (!group[0][0] \|\| strcmp(objname, DEFOBJ))
376	<	return(objname); /* good enough for us */
377	<
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++)
384	>	while ( (cp1 = cp2++) )
385		if (++cp1 >= name+sizeof(name)-2) {
386		*cp1 = '\0';
387		return(name);
#	Line 373 \| Line 391 \| *getonm() / invent a good name for object /*
391		}
392
393
394	<	matchrule(rp) /* check for a match on this rule */
395	<	register RULEHD *rp;
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]))
#	Line 403 \| Line 427 \| *register RULEHD rp;**
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]))
#	Line 418 \| Line 444 \| *register RULEHD rp;**
444		}
445
446
447	<	cvtndx(vi, vs) /* convert vertex string to index */
448	<	register VNDX vi;
449	<	register char *vs;
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);
#	Line 428 \| Line 456 \| *register char vs;**
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
#	Line 442 \| 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 456 \| 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 465 \| Line 493 \| *register char vs;**
493		}
494
495
496	<	nonplanar(ac, av) /* are vertices are non-planar? */
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	<	FLOAT p0, p1;
503	>	RREAL p0, p1;
504		FVECT v1, v2, nsum, newn;
505		double d;
506		register int i;
507
508		if (!cvtndx(vi, av[0]))
509		return(0);
510	<	if (vi[2] >= 0)
510	>	if (!flatten && vi[2] >= 0)
511		return(1); /* has interpolated normals */
512		if (ac < 4)
513		return(0); /* it's a triangle! */
#	Line 516 \| Line 546 \| register char av;**
546		}
547
548
549	<	putface(ac, av) /* put out an N-sided polygon */
550	<	int ac;
551	<	register char **av;
549	>	int
550	>	putface( /* put out an N-sided polygon */
551	>	int ac,
552	>	register char **av
553	>	)
554		{
555		VNDX vi;
556	<	char *mod;
556	>	char *cp;
557		register int i;
558
559	<	if (nonplanar(ac, av)) { /* break into quads and triangles */
560	<	while (ac > 3) {
561	<	if (!putquad(av[0], av[1], av[2], av[3]))
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 -= 2; /* remove two vertices */
564	<	for (i = 1; i < ac; i++)
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		}
535	–	if (ac == 3 && !puttri(av[0], av[1], av[2]))
536	–	return(0);
569		return(1);
570		}
571	<	if ((mod = getmtl()) == NULL)
571	>	if ((cp = getmtl()) == NULL)
572		return(-1);
573	<	printf("\n%s polygon %s.%d\n", mod, getonm(), faceno);
573	>	printf("\n%s polygon %s.%d\n", cp, getonm(), faceno);
574		printf("0\n0\n%d\n", 3*ac);
575		for (i = 0; i < ac; i++) {
576		if (!cvtndx(vi, av[i]))
#	Line 549 \| 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;
592		VNDX v1i, v2i, v3i;
593		BARYCCM bvecs;
594	<	int texOK, patOK;
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);
#	Line 563 \| Line 602 \| *char v1, v2, v3;**
602		if (!cvtndx(v1i, v1) \|\| !cvtndx(v2i, v2) \|\| !cvtndx(v3i, v3))
603		return(0);
604		/* compute barycentric coordinates */
605	<	texOK = (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=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]],
631	>	if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]],
632		vlist[v3i[0]]) < 0)
633		return(-1);
634		/* put out texture (if any) */
#	Line 574 \| Line 636 \| *char v1, v2, v3;**
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],
584	<	vnlist[v3i[2]][1]);
585	<	printf("\t%14.12g %14.12g %14.12g\n",
586	<	vnlist[v1i[2]][2], vnlist[v2i[2]][2],
587	<	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 (patOK) {
650		printf("\n%s colorpict %s\n", mod, PATNAME);
651		mod = PATNAME;
652		printf("7 noneg noneg noneg %s %s u v\n", mapname, 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]);
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 */
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	<
612	<	int
613	<	comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */
614	<	register BARYCCM bcm;
615	<	FLOAT v1, v2, *v3;
616	<	{
617	<	FLOAT *vt;
618	<	FVECT va, vab, vcb;
619	<	double d;
620	<	register int i, j;
621	<
622	<	for (j = 0; j < 3; j++) {
623	<	for (i = 0; i < 3; i++) {
624	<	vab[i] = v1[i] - v2[i];
625	<	vcb[i] = v3[i] - v2[i];
626	<	}
627	<	d = DOT(vcb,vcb);
628	<	if (d <= FTINY)
629	<	return(-1);
630	<	d = DOT(vcb,vab)/d;
631	<	for (i = 0; i < 3; i++)
632	<	va[i] = vab[i] - vcb[i]*d;
633	<	d = DOT(va,va);
634	<	if (d <= FTINY)
635	<	return(-1);
636	<	for (i = 0; i < 3; i++) {
637	<	va[i] /= d;
638	<	bcm[j][i] = va[i];
639	<	}
640	<	bcm[j][3] = -DOT(v2,va);
641	<	/* rotate vertices */
642	<	vt = v1;
643	<	v1 = v2;
644	<	v2 = v3;
645	<	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		}
647	–	return(0);
648	–	}
649	–
650	–
651	–	put_baryc(bcm) /* put barycentric coord. vectors */
652	–	register BARYCCM bcm;
653	–	{
654	–	register int i;
655	–
656	–	for (i = 0; i < 3; i++)
657	–	printf("%14.8f %14.8f %14.8f %14.8f\n",
658	–	bcm[i][0], bcm[i][1], bcm[i][2], bcm[i][3]);
659	–	}
660	–
661	–
662	–	putquad(p0, p1, p3, p2) /* put out a quadrilateral */
663	–	char p0, p1, p3, p2; /* names correspond to binary pos. */
664	–	{
665	–	VNDX p0i, p1i, p2i, p3i;
666	–	FVECT norm[4];
667	–	char mod, name;
668	–	int axis;
669	–	FVECT v1, v2, vc1, vc2;
670	–	int ok1, ok2;
671	–
672	–	if ((mod = getmtl()) == NULL)
673	–	return(-1);
674	–	name = getonm();
675	–	/* get actual indices */
676	–	if (!cvtndx(p0i,p0) \|\| !cvtndx(p1i,p1) \|\|
677	–	!cvtndx(p2i,p2) \|\| !cvtndx(p3i,p3))
678	–	return(0);
679	–	/* compute exact normals */
680	–	fvsum(v1, vlist[p1i[0]], vlist[p0i[0]], -1.0);
681	–	fvsum(v2, vlist[p2i[0]], vlist[p0i[0]], -1.0);
682	–	fcross(vc1, v1, v2);
683	–	ok1 = normalize(vc1) != 0.0;
684	–	fvsum(v1, vlist[p2i[0]], vlist[p3i[0]], -1.0);
685	–	fvsum(v2, vlist[p1i[0]], vlist[p3i[0]], -1.0);
686	–	fcross(vc2, v1, v2);
687	–	ok2 = normalize(vc2) != 0.0;
688	–	if (!(ok1 \| ok2))
689	–	return(-1);
690	–	/* compute normal interpolation */
691	–	axis = norminterp(norm, p0i, p1i, p2i, p3i);
692	–
693	–	/* put out quadrilateral? */
694	–	if (ok1 & ok2 && fabs(fdot(vc1,vc2)) >= 1.0-FTINY) {
695	–	printf("\n%s ", mod);
696	–	if (axis != -1) {
697	–	printf("texfunc %s\n", TEXNAME);
698	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
699	–	printf("0\n13\t%d\n", axis);
700	–	pvect(norm[0]);
701	–	pvect(norm[1]);
702	–	pvect(norm[2]);
703	–	fvsum(v1, norm[3], vc1, -0.5);
704	–	fvsum(v1, v1, vc2, -0.5);
705	–	pvect(v1);
706	–	printf("\n%s ", TEXNAME);
707	–	}
708	–	printf("polygon %s.%d\n", name, faceno);
709	–	printf("0\n0\n12\n");
710	–	pvect(vlist[p0i[0]]);
711	–	pvect(vlist[p1i[0]]);
712	–	pvect(vlist[p3i[0]]);
713	–	pvect(vlist[p2i[0]]);
714	–	return(1);
715	–	}
716	–	/* put out triangles? */
717	–	if (ok1) {
718	–	printf("\n%s ", mod);
719	–	if (axis != -1) {
720	–	printf("texfunc %s\n", TEXNAME);
721	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
722	–	printf("0\n13\t%d\n", axis);
723	–	pvect(norm[0]);
724	–	pvect(norm[1]);
725	–	pvect(norm[2]);
726	–	fvsum(v1, norm[3], vc1, -1.0);
727	–	pvect(v1);
728	–	printf("\n%s ", TEXNAME);
729	–	}
730	–	printf("polygon %s.%da\n", name, faceno);
731	–	printf("0\n0\n9\n");
732	–	pvect(vlist[p0i[0]]);
733	–	pvect(vlist[p1i[0]]);
734	–	pvect(vlist[p2i[0]]);
735	–	}
736	–	if (ok2) {
737	–	printf("\n%s ", mod);
738	–	if (axis != -1) {
739	–	printf("texfunc %s\n", TEXNAME);
740	–	printf("4 surf_dx surf_dy surf_dz %s\n", QCALNAME);
741	–	printf("0\n13\t%d\n", axis);
742	–	pvect(norm[0]);
743	–	pvect(norm[1]);
744	–	pvect(norm[2]);
745	–	fvsum(v2, norm[3], vc2, -1.0);
746	–	pvect(v2);
747	–	printf("\n%s ", TEXNAME);
748	–	}
749	–	printf("polygon %s.%db\n", name, faceno);
750	–	printf("0\n0\n9\n");
751	–	pvect(vlist[p2i[0]]);
752	–	pvect(vlist[p1i[0]]);
753	–	pvect(vlist[p3i[0]]);
754	–	}
674		return(1);
675		}
676
677
678	<	int
679	<	norminterp(resmat, p0i, p1i, p2i, p3i) /* compute normal interpolation */
761	<	register FVECT resmat[4];
762	<	register VNDX p0i, p1i, p2i, p3i;
678	>	void
679	>	freeverts(void) /* free all vertices */
680		{
764	–	#define u ((ax+1)%3)
765	–	#define v ((ax+2)%3)
766	–
767	–	register int ax;
768	–	MAT4 eqnmat;
769	–	FVECT v1;
770	–	register int i, j;
771	–
772	–	if (!(p0i[2]>=0 && p1i[2]>=0 && p2i[2]>=0 && p3i[2]>=0))
773	–	return(-1);
774	–	/* find dominant axis */
775	–	VCOPY(v1, vnlist[p0i[2]]);
776	–	fvsum(v1, v1, vnlist[p1i[2]], 1.0);
777	–	fvsum(v1, v1, vnlist[p2i[2]], 1.0);
778	–	fvsum(v1, v1, vnlist[p3i[2]], 1.0);
779	–	ax = ABS(v1[0]) > ABS(v1[1]) ? 0 : 1;
780	–	ax = ABS(v1[ax]) > ABS(v1[2]) ? ax : 2;
781	–	/* assign equation matrix */
782	–	eqnmat[0][0] = vlist[p0i[0]][u]*vlist[p0i[0]][v];
783	–	eqnmat[0][1] = vlist[p0i[0]][u];
784	–	eqnmat[0][2] = vlist[p0i[0]][v];
785	–	eqnmat[0][3] = 1.0;
786	–	eqnmat[1][0] = vlist[p1i[0]][u]*vlist[p1i[0]][v];
787	–	eqnmat[1][1] = vlist[p1i[0]][u];
788	–	eqnmat[1][2] = vlist[p1i[0]][v];
789	–	eqnmat[1][3] = 1.0;
790	–	eqnmat[2][0] = vlist[p2i[0]][u]*vlist[p2i[0]][v];
791	–	eqnmat[2][1] = vlist[p2i[0]][u];
792	–	eqnmat[2][2] = vlist[p2i[0]][v];
793	–	eqnmat[2][3] = 1.0;
794	–	eqnmat[3][0] = vlist[p3i[0]][u]*vlist[p3i[0]][v];
795	–	eqnmat[3][1] = vlist[p3i[0]][u];
796	–	eqnmat[3][2] = vlist[p3i[0]][v];
797	–	eqnmat[3][3] = 1.0;
798	–	/* invert matrix (solve system) */
799	–	if (!invmat4(eqnmat, eqnmat))
800	–	return(-1); /* no solution */
801	–	/* compute result matrix */
802	–	for (j = 0; j < 4; j++)
803	–	for (i = 0; i < 3; i++)
804	–	resmat[j][i] = eqnmat[j][0]*vnlist[p0i[2]][i] +
805	–	eqnmat[j][1]*vnlist[p1i[2]][i] +
806	–	eqnmat[j][2]*vnlist[p2i[2]][i] +
807	–	eqnmat[j][3]*vnlist[p3i[2]][i];
808	–	return(ax);
809	–
810	–	#undef u
811	–	#undef v
812	–	}
813	–
814	–
815	–	freeverts() /* free all vertices */
816	–	{
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 854 \| 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 880 \| Line 750 \| double x, y, z;
750
751
752		int
753	<	newvt(x, y) /* create a new texture map 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 903 \| Line 775 \| double x, y;
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 2.5 by greg, Wed Apr 13 17:24:24 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 2.5 by greg, Wed Apr 13 17:24:24 1994 UTC vs.
Revision 2.22 by schorsch, Sat Nov 15 17:54:06 2003 UTC