1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.23 |
static const char RCSid[] = "$Id: obj2rad.c,v 2.22 2003/11/15 17:54:06 schorsch Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
|
|
/* |
5 |
|
|
* Convert a Wavefront .obj file to Radiance format. |
6 |
|
|
* |
7 |
greg |
2.5 |
* Currently, we support only polygonal geometry. Non-planar |
8 |
|
|
* faces are broken rather haphazardly into triangles. |
9 |
greg |
2.3 |
* Also, texture map indices only work for triangles, though |
10 |
greg |
2.7 |
* I'm not sure they work correctly. (Taken out -- see TEXMAPS defines.) |
11 |
greg |
2.1 |
*/ |
12 |
|
|
|
13 |
schorsch |
2.22 |
#include <stdlib.h> |
14 |
|
|
#include <stdio.h> |
15 |
|
|
#include <ctype.h> |
16 |
greg |
2.1 |
|
17 |
schorsch |
2.22 |
#include "rtmath.h" |
18 |
|
|
#include "rtio.h" |
19 |
|
|
#include "resolu.h" |
20 |
greg |
2.3 |
#include "trans.h" |
21 |
greg |
2.15 |
#include "tmesh.h" |
22 |
|
|
|
23 |
greg |
2.1 |
|
24 |
|
|
#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
25 |
|
|
#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
26 |
greg |
2.3 |
#define DEFOBJ "unnamed" /* default object name */ |
27 |
|
|
#define DEFMAT "white" /* default material name */ |
28 |
greg |
2.1 |
|
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 |
schorsch |
2.20 |
RREAL (*vtlist)[2]; /* map vertex list */ |
36 |
greg |
2.1 |
int nvts; |
37 |
|
|
|
38 |
greg |
2.3 |
typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
39 |
greg |
2.1 |
|
40 |
greg |
2.23 |
#define CHUNKSIZ 1024 /* vertex allocation chunk size */ |
41 |
greg |
2.1 |
|
42 |
greg |
2.23 |
#define MAXARG 512 /* maximum # arguments in a statement */ |
43 |
greg |
2.1 |
|
44 |
greg |
2.3 |
/* 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 |
greg |
2.1 |
|
52 |
greg |
2.3 |
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 |
greg |
2.8 |
int flatten = 0; /* discard surface normal information */ |
70 |
|
|
|
71 |
greg |
2.3 |
char mapname[128]; /* current picture file */ |
72 |
greg |
2.1 |
char matname[64]; /* current material name */ |
73 |
greg |
2.3 |
char group[16][32]; /* current group names */ |
74 |
greg |
2.1 |
char objname[128]; /* current object name */ |
75 |
greg |
2.6 |
char *inpfile; /* input file name */ |
76 |
greg |
2.1 |
int lineno; /* current line number */ |
77 |
greg |
2.6 |
int faceno; /* current face number */ |
78 |
greg |
2.1 |
|
79 |
schorsch |
2.22 |
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 |
greg |
2.1 |
|
96 |
schorsch |
2.22 |
int |
97 |
|
|
main( /* read in .obj file and convert */ |
98 |
|
|
int argc, |
99 |
|
|
char *argv[] |
100 |
|
|
) |
101 |
greg |
2.1 |
{ |
102 |
greg |
2.6 |
int donames = 0; |
103 |
greg |
2.1 |
int i; |
104 |
|
|
|
105 |
|
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
106 |
|
|
switch (argv[i][1]) { |
107 |
|
|
case 'o': /* object name */ |
108 |
|
|
defobj = argv[++i]; |
109 |
|
|
break; |
110 |
greg |
2.3 |
case 'n': /* just produce name list */ |
111 |
|
|
donames++; |
112 |
greg |
2.1 |
break; |
113 |
greg |
2.3 |
case 'm': /* use custom mapfile */ |
114 |
|
|
ourmapping = getmapping(argv[++i], &qlist); |
115 |
greg |
2.1 |
break; |
116 |
greg |
2.8 |
case 'f': /* flatten surfaces */ |
117 |
|
|
flatten++; |
118 |
|
|
break; |
119 |
greg |
2.1 |
default: |
120 |
greg |
2.3 |
goto userr; |
121 |
greg |
2.1 |
} |
122 |
schorsch |
2.21 |
if ((i > argc) | (i < argc-1)) |
123 |
greg |
2.3 |
goto userr; |
124 |
|
|
if (i == argc) |
125 |
greg |
2.6 |
inpfile = "<stdin>"; |
126 |
|
|
else if (freopen(inpfile=argv[i], "r", stdin) == NULL) { |
127 |
|
|
fprintf(stderr, "%s: cannot open\n", inpfile); |
128 |
greg |
2.3 |
exit(1); |
129 |
|
|
} |
130 |
|
|
if (donames) { /* scan for ids */ |
131 |
|
|
getnames(stdin); |
132 |
greg |
2.6 |
printf("filename \"%s\"\n", inpfile); |
133 |
greg |
2.3 |
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 |
greg |
2.6 |
convert(stdin); |
142 |
greg |
2.3 |
} |
143 |
|
|
exit(0); |
144 |
|
|
userr: |
145 |
greg |
2.9 |
fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n", |
146 |
greg |
2.3 |
argv[0]); |
147 |
|
|
exit(1); |
148 |
|
|
} |
149 |
|
|
|
150 |
|
|
|
151 |
schorsch |
2.22 |
void |
152 |
|
|
getnames( /* get valid qualifier names */ |
153 |
|
|
FILE *fp |
154 |
|
|
) |
155 |
greg |
2.3 |
{ |
156 |
|
|
char *argv[MAXARG]; |
157 |
|
|
int argc; |
158 |
|
|
ID tmpid; |
159 |
|
|
register int i; |
160 |
|
|
|
161 |
schorsch |
2.21 |
while ( (argc = getstmt(argv, fp)) ) |
162 |
greg |
2.3 |
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 |
greg |
2.1 |
} |
181 |
greg |
2.3 |
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 |
greg |
2.1 |
} |
199 |
|
|
} |
200 |
|
|
|
201 |
|
|
|
202 |
schorsch |
2.22 |
void |
203 |
|
|
convert( /* convert a T-mesh */ |
204 |
|
|
FILE *fp |
205 |
|
|
) |
206 |
greg |
2.1 |
{ |
207 |
|
|
char *argv[MAXARG]; |
208 |
|
|
int argc; |
209 |
|
|
int nstats, nunknown; |
210 |
|
|
register int i; |
211 |
greg |
2.6 |
|
212 |
greg |
2.1 |
nstats = nunknown = 0; |
213 |
|
|
/* scan until EOF */ |
214 |
schorsch |
2.21 |
while ( (argc = getstmt(argv, fp)) ) { |
215 |
greg |
2.1 |
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 |
greg |
2.6 |
syntax("Bad vertex"); |
221 |
greg |
2.1 |
newv(atof(argv[1]), atof(argv[2]), |
222 |
|
|
atof(argv[3])); |
223 |
|
|
break; |
224 |
|
|
case 'n': /* normal */ |
225 |
|
|
if (argv[0][2]) |
226 |
|
|
goto unknown; |
227 |
|
|
if (badarg(argc-1,argv+1,"fff")) |
228 |
greg |
2.6 |
syntax("Bad normal"); |
229 |
greg |
2.1 |
if (!newvn(atof(argv[1]), atof(argv[2]), |
230 |
|
|
atof(argv[3]))) |
231 |
greg |
2.6 |
syntax("Zero normal"); |
232 |
greg |
2.1 |
break; |
233 |
greg |
2.3 |
case 't': /* texture map */ |
234 |
greg |
2.1 |
if (argv[0][2]) |
235 |
|
|
goto unknown; |
236 |
|
|
if (badarg(argc-1,argv+1,"ff")) |
237 |
|
|
goto unknown; |
238 |
|
|
newvt(atof(argv[1]), atof(argv[2])); |
239 |
|
|
break; |
240 |
|
|
default: |
241 |
|
|
goto unknown; |
242 |
|
|
} |
243 |
|
|
break; |
244 |
|
|
case 'f': /* face */ |
245 |
|
|
if (argv[0][1]) |
246 |
|
|
goto unknown; |
247 |
greg |
2.3 |
faceno++; |
248 |
greg |
2.1 |
switch (argc-1) { |
249 |
|
|
case 0: case 1: case 2: |
250 |
greg |
2.6 |
syntax("Too few vertices"); |
251 |
greg |
2.1 |
break; |
252 |
|
|
case 3: |
253 |
|
|
if (!puttri(argv[1], argv[2], argv[3])) |
254 |
greg |
2.6 |
syntax("Bad triangle"); |
255 |
greg |
2.1 |
break; |
256 |
|
|
default: |
257 |
|
|
if (!putface(argc-1, argv+1)) |
258 |
greg |
2.6 |
syntax("Bad face"); |
259 |
greg |
2.1 |
break; |
260 |
|
|
} |
261 |
|
|
break; |
262 |
|
|
case 'u': |
263 |
|
|
if (!strcmp(argv[0], "usemtl")) { /* material */ |
264 |
|
|
if (argc < 2) |
265 |
|
|
break; /* not fatal */ |
266 |
|
|
strcpy(matname, argv[1]); |
267 |
|
|
} else if (!strcmp(argv[0], "usemap")) {/* map */ |
268 |
|
|
if (argc < 2) |
269 |
|
|
break; /* not fatal */ |
270 |
|
|
if (!strcmp(argv[1], "off")) |
271 |
greg |
2.3 |
mapname[0] = '\0'; |
272 |
greg |
2.1 |
else |
273 |
greg |
2.7 |
sprintf(mapname, "%s.pic", argv[1]); |
274 |
greg |
2.1 |
} else |
275 |
|
|
goto unknown; |
276 |
|
|
break; |
277 |
|
|
case 'o': /* object name */ |
278 |
|
|
if (argv[0][1]) |
279 |
|
|
goto unknown; |
280 |
|
|
if (argc < 2) |
281 |
|
|
break; /* not fatal */ |
282 |
|
|
strcpy(objname, argv[1]); |
283 |
|
|
break; |
284 |
|
|
case 'g': /* group name(s) */ |
285 |
|
|
if (argv[0][1]) |
286 |
|
|
goto unknown; |
287 |
|
|
for (i = 1; i < argc; i++) |
288 |
greg |
2.3 |
strcpy(group[i-1], argv[i]); |
289 |
|
|
group[i-1][0] = '\0'; |
290 |
greg |
2.1 |
break; |
291 |
|
|
case '#': /* comment */ |
292 |
greg |
2.7 |
printargs(argc, argv, stdout); |
293 |
greg |
2.1 |
break; |
294 |
|
|
default:; /* something we don't deal with */ |
295 |
|
|
unknown: |
296 |
|
|
nunknown++; |
297 |
|
|
break; |
298 |
|
|
} |
299 |
|
|
nstats++; |
300 |
|
|
} |
301 |
greg |
2.6 |
printf("\n# Done processing file: %s\n", inpfile); |
302 |
greg |
2.1 |
printf("# %d lines, %d statements, %d unrecognized\n", |
303 |
|
|
lineno, nstats, nunknown); |
304 |
|
|
} |
305 |
|
|
|
306 |
|
|
|
307 |
|
|
int |
308 |
schorsch |
2.22 |
getstmt( /* read the next statement from fp */ |
309 |
|
|
register char *av[MAXARG], |
310 |
|
|
FILE *fp |
311 |
|
|
) |
312 |
greg |
2.1 |
{ |
313 |
greg |
2.23 |
static char sbuf[MAXARG*16]; |
314 |
greg |
2.1 |
register char *cp; |
315 |
|
|
register int i; |
316 |
|
|
|
317 |
|
|
do { |
318 |
|
|
if (fgetline(cp=sbuf, sizeof(sbuf), fp) == NULL) |
319 |
|
|
return(0); |
320 |
|
|
i = 0; |
321 |
|
|
for ( ; ; ) { |
322 |
|
|
while (isspace(*cp) || *cp == '\\') { |
323 |
|
|
if (*cp == '\n') |
324 |
|
|
lineno++; |
325 |
|
|
*cp++ = '\0'; |
326 |
|
|
} |
327 |
greg |
2.23 |
if (!*cp) |
328 |
greg |
2.1 |
break; |
329 |
greg |
2.23 |
if (i >= MAXARG-1) { |
330 |
|
|
fprintf(stderr, |
331 |
|
|
"warning: line %d: too many arguments (limit %d)\n", |
332 |
|
|
lineno+1, MAXARG-1); |
333 |
|
|
break; |
334 |
|
|
} |
335 |
greg |
2.1 |
av[i++] = cp; |
336 |
|
|
while (*++cp && !isspace(*cp)) |
337 |
|
|
; |
338 |
|
|
} |
339 |
|
|
av[i] = NULL; |
340 |
|
|
lineno++; |
341 |
|
|
} while (!i); |
342 |
|
|
|
343 |
|
|
return(i); |
344 |
|
|
} |
345 |
|
|
|
346 |
greg |
2.3 |
|
347 |
|
|
char * |
348 |
schorsch |
2.22 |
getmtl(void) /* figure material for this face */ |
349 |
greg |
2.3 |
{ |
350 |
|
|
register RULEHD *rp = ourmapping; |
351 |
|
|
|
352 |
greg |
2.6 |
if (rp == NULL) { /* no rule set */ |
353 |
|
|
if (matname[0]) |
354 |
|
|
return(matname); |
355 |
|
|
if (group[0][0]) |
356 |
|
|
return(group[0]); |
357 |
|
|
return(defmat); |
358 |
|
|
} |
359 |
greg |
2.3 |
/* check for match */ |
360 |
|
|
do { |
361 |
|
|
if (matchrule(rp)) { |
362 |
|
|
if (!strcmp(rp->mnam, VOIDID)) |
363 |
|
|
return(NULL); /* match is null */ |
364 |
|
|
return(rp->mnam); |
365 |
|
|
} |
366 |
|
|
rp = rp->next; |
367 |
|
|
} while (rp != NULL); |
368 |
|
|
/* no match found */ |
369 |
|
|
return(NULL); |
370 |
|
|
} |
371 |
|
|
|
372 |
|
|
|
373 |
|
|
char * |
374 |
schorsch |
2.22 |
getonm(void) /* invent a good name for object */ |
375 |
greg |
2.3 |
{ |
376 |
|
|
static char name[64]; |
377 |
|
|
register char *cp1, *cp2; |
378 |
|
|
register int i; |
379 |
greg |
2.6 |
/* check for preset */ |
380 |
|
|
if (objname[0]) |
381 |
|
|
return(objname); |
382 |
|
|
if (!group[0][0]) |
383 |
|
|
return(defobj); |
384 |
greg |
2.3 |
cp1 = name; /* else make name out of groups */ |
385 |
|
|
for (i = 0; group[i][0]; i++) { |
386 |
|
|
cp2 = group[i]; |
387 |
|
|
if (cp1 > name) |
388 |
|
|
*cp1++ = '.'; |
389 |
schorsch |
2.21 |
while ( (*cp1 = *cp2++) ) |
390 |
greg |
2.3 |
if (++cp1 >= name+sizeof(name)-2) { |
391 |
|
|
*cp1 = '\0'; |
392 |
|
|
return(name); |
393 |
|
|
} |
394 |
|
|
} |
395 |
|
|
return(name); |
396 |
|
|
} |
397 |
|
|
|
398 |
|
|
|
399 |
schorsch |
2.22 |
int |
400 |
|
|
matchrule( /* check for a match on this rule */ |
401 |
|
|
register RULEHD *rp |
402 |
|
|
) |
403 |
greg |
2.3 |
{ |
404 |
|
|
ID tmpid; |
405 |
|
|
int gotmatch; |
406 |
|
|
register int i; |
407 |
|
|
|
408 |
|
|
if (rp->qflg & FL(Q_MTL)) { |
409 |
greg |
2.6 |
if (!matname[0]) |
410 |
|
|
return(0); |
411 |
greg |
2.3 |
tmpid.number = 0; |
412 |
|
|
tmpid.name = matname; |
413 |
|
|
if (!matchid(&tmpid, &idm(rp)[Q_MTL])) |
414 |
|
|
return(0); |
415 |
|
|
} |
416 |
|
|
if (rp->qflg & FL(Q_MAP)) { |
417 |
greg |
2.6 |
if (!mapname[0]) |
418 |
|
|
return(0); |
419 |
greg |
2.3 |
tmpid.number = 0; |
420 |
|
|
tmpid.name = mapname; |
421 |
|
|
if (!matchid(&tmpid, &idm(rp)[Q_MAP])) |
422 |
|
|
return(0); |
423 |
|
|
} |
424 |
|
|
if (rp->qflg & FL(Q_GRP)) { |
425 |
|
|
tmpid.number = 0; |
426 |
|
|
gotmatch = 0; |
427 |
|
|
for (i = 0; group[i][0]; i++) { |
428 |
|
|
tmpid.name = group[i]; |
429 |
|
|
gotmatch |= matchid(&tmpid, &idm(rp)[Q_GRP]); |
430 |
|
|
} |
431 |
|
|
if (!gotmatch) |
432 |
|
|
return(0); |
433 |
|
|
} |
434 |
|
|
if (rp->qflg & FL(Q_OBJ)) { |
435 |
greg |
2.6 |
if (!objname[0]) |
436 |
|
|
return(0); |
437 |
greg |
2.3 |
tmpid.number = 0; |
438 |
|
|
tmpid.name = objname; |
439 |
|
|
if (!matchid(&tmpid, &idm(rp)[Q_OBJ])) |
440 |
|
|
return(0); |
441 |
|
|
} |
442 |
|
|
if (rp->qflg & FL(Q_FAC)) { |
443 |
|
|
tmpid.name = NULL; |
444 |
|
|
tmpid.number = faceno; |
445 |
|
|
if (!matchid(&tmpid, &idm(rp)[Q_FAC])) |
446 |
|
|
return(0); |
447 |
|
|
} |
448 |
|
|
return(1); |
449 |
|
|
} |
450 |
|
|
|
451 |
|
|
|
452 |
schorsch |
2.22 |
int |
453 |
|
|
cvtndx( /* convert vertex string to index */ |
454 |
|
|
register VNDX vi, |
455 |
|
|
register char *vs |
456 |
|
|
) |
457 |
greg |
2.1 |
{ |
458 |
|
|
/* get point */ |
459 |
|
|
vi[0] = atoi(vs); |
460 |
|
|
if (vi[0] > 0) { |
461 |
|
|
if (vi[0]-- > nvs) |
462 |
|
|
return(0); |
463 |
|
|
} else if (vi[0] < 0) { |
464 |
greg |
2.9 |
vi[0] += nvs; |
465 |
greg |
2.1 |
if (vi[0] < 0) |
466 |
|
|
return(0); |
467 |
|
|
} else |
468 |
|
|
return(0); |
469 |
greg |
2.3 |
/* get map */ |
470 |
greg |
2.1 |
while (*vs) |
471 |
|
|
if (*vs++ == '/') |
472 |
|
|
break; |
473 |
|
|
vi[1] = atoi(vs); |
474 |
|
|
if (vi[1] > 0) { |
475 |
|
|
if (vi[1]-- > nvts) |
476 |
|
|
return(0); |
477 |
|
|
} else if (vi[1] < 0) { |
478 |
greg |
2.9 |
vi[1] += nvts; |
479 |
greg |
2.1 |
if (vi[1] < 0) |
480 |
|
|
return(0); |
481 |
|
|
} else |
482 |
|
|
vi[1] = -1; |
483 |
|
|
/* get normal */ |
484 |
|
|
while (*vs) |
485 |
|
|
if (*vs++ == '/') |
486 |
|
|
break; |
487 |
|
|
vi[2] = atoi(vs); |
488 |
|
|
if (vi[2] > 0) { |
489 |
|
|
if (vi[2]-- > nvns) |
490 |
|
|
return(0); |
491 |
|
|
} else if (vi[2] < 0) { |
492 |
greg |
2.9 |
vi[2] += nvns; |
493 |
greg |
2.1 |
if (vi[2] < 0) |
494 |
|
|
return(0); |
495 |
|
|
} else |
496 |
|
|
vi[2] = -1; |
497 |
|
|
return(1); |
498 |
|
|
} |
499 |
|
|
|
500 |
|
|
|
501 |
schorsch |
2.22 |
int |
502 |
|
|
nonplanar( /* are vertices non-planar? */ |
503 |
|
|
register int ac, |
504 |
|
|
register char **av |
505 |
|
|
) |
506 |
greg |
2.1 |
{ |
507 |
|
|
VNDX vi; |
508 |
schorsch |
2.20 |
RREAL *p0, *p1; |
509 |
greg |
2.5 |
FVECT v1, v2, nsum, newn; |
510 |
|
|
double d; |
511 |
|
|
register int i; |
512 |
|
|
|
513 |
|
|
if (!cvtndx(vi, av[0])) |
514 |
|
|
return(0); |
515 |
greg |
2.12 |
if (!flatten && vi[2] >= 0) |
516 |
greg |
2.5 |
return(1); /* has interpolated normals */ |
517 |
|
|
if (ac < 4) |
518 |
|
|
return(0); /* it's a triangle! */ |
519 |
|
|
/* set up */ |
520 |
|
|
p0 = vlist[vi[0]]; |
521 |
|
|
if (!cvtndx(vi, av[1])) |
522 |
|
|
return(0); /* error gets caught later */ |
523 |
|
|
nsum[0] = nsum[1] = nsum[2] = 0.; |
524 |
|
|
p1 = vlist[vi[0]]; |
525 |
|
|
fvsum(v2, p1, p0, -1.0); |
526 |
|
|
for (i = 2; i < ac; i++) { |
527 |
|
|
VCOPY(v1, v2); |
528 |
|
|
if (!cvtndx(vi, av[i])) |
529 |
|
|
return(0); |
530 |
|
|
p1 = vlist[vi[0]]; |
531 |
|
|
fvsum(v2, p1, p0, -1.0); |
532 |
|
|
fcross(newn, v1, v2); |
533 |
|
|
if (normalize(newn) == 0.0) { |
534 |
|
|
if (i < 3) |
535 |
|
|
return(1); /* can't deal with this */ |
536 |
|
|
fvsum(nsum, nsum, nsum, 1./(i-2)); |
537 |
|
|
continue; |
538 |
|
|
} |
539 |
|
|
d = fdot(newn,nsum); |
540 |
|
|
if (d >= 0) { |
541 |
|
|
if (d < (1.0-FTINY)*(i-2)) |
542 |
|
|
return(1); |
543 |
|
|
fvsum(nsum, nsum, newn, 1.0); |
544 |
|
|
} else { |
545 |
|
|
if (d > -(1.0-FTINY)*(i-2)) |
546 |
|
|
return(1); |
547 |
|
|
fvsum(nsum, nsum, newn, -1.0); |
548 |
|
|
} |
549 |
|
|
} |
550 |
|
|
return(0); |
551 |
|
|
} |
552 |
|
|
|
553 |
|
|
|
554 |
schorsch |
2.22 |
int |
555 |
|
|
putface( /* put out an N-sided polygon */ |
556 |
|
|
int ac, |
557 |
|
|
register char **av |
558 |
|
|
) |
559 |
greg |
2.5 |
{ |
560 |
|
|
VNDX vi; |
561 |
greg |
2.7 |
char *cp; |
562 |
greg |
2.5 |
register int i; |
563 |
greg |
2.1 |
|
564 |
greg |
2.11 |
if (nonplanar(ac, av)) { /* break into triangles */ |
565 |
|
|
while (ac > 2) { |
566 |
|
|
if (!puttri(av[0], av[1], av[2])) |
567 |
greg |
2.5 |
return(0); |
568 |
greg |
2.11 |
ac--; /* remove vertex & rotate */ |
569 |
greg |
2.7 |
cp = av[0]; |
570 |
|
|
for (i = 0; i < ac-1; i++) |
571 |
greg |
2.11 |
av[i] = av[i+2]; |
572 |
greg |
2.7 |
av[i] = cp; |
573 |
greg |
2.5 |
} |
574 |
|
|
return(1); |
575 |
|
|
} |
576 |
greg |
2.7 |
if ((cp = getmtl()) == NULL) |
577 |
greg |
2.3 |
return(-1); |
578 |
greg |
2.7 |
printf("\n%s polygon %s.%d\n", cp, getonm(), faceno); |
579 |
greg |
2.1 |
printf("0\n0\n%d\n", 3*ac); |
580 |
greg |
2.5 |
for (i = 0; i < ac; i++) { |
581 |
|
|
if (!cvtndx(vi, av[i])) |
582 |
greg |
2.1 |
return(0); |
583 |
|
|
pvect(vlist[vi[0]]); |
584 |
|
|
} |
585 |
|
|
return(1); |
586 |
|
|
} |
587 |
|
|
|
588 |
|
|
|
589 |
schorsch |
2.22 |
int |
590 |
|
|
puttri( /* put out a triangle */ |
591 |
|
|
char *v1, |
592 |
|
|
char *v2, |
593 |
|
|
char *v3 |
594 |
|
|
) |
595 |
greg |
2.1 |
{ |
596 |
greg |
2.3 |
char *mod; |
597 |
greg |
2.1 |
VNDX v1i, v2i, v3i; |
598 |
|
|
BARYCCM bvecs; |
599 |
schorsch |
2.20 |
RREAL bcoor[3][3]; |
600 |
schorsch |
2.22 |
int texOK = 0, patOK; |
601 |
greg |
2.18 |
int flatness; |
602 |
greg |
2.13 |
register int i; |
603 |
greg |
2.1 |
|
604 |
greg |
2.3 |
if ((mod = getmtl()) == NULL) |
605 |
|
|
return(-1); |
606 |
|
|
|
607 |
greg |
2.1 |
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
608 |
|
|
return(0); |
609 |
|
|
/* compute barycentric coordinates */ |
610 |
greg |
2.18 |
if (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0) |
611 |
|
|
flatness = flat_tri(vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]], |
612 |
|
|
vnlist[v1i[2]], vnlist[v2i[2]], vnlist[v3i[2]]); |
613 |
greg |
2.16 |
else |
614 |
greg |
2.18 |
flatness = ISFLAT; |
615 |
|
|
|
616 |
|
|
switch (flatness) { |
617 |
|
|
case DEGEN: /* zero area */ |
618 |
|
|
return(-1); |
619 |
|
|
case RVFLAT: /* reversed normals, but flat */ |
620 |
|
|
case ISFLAT: /* smoothing unnecessary */ |
621 |
|
|
texOK = 0; |
622 |
|
|
break; |
623 |
|
|
case RVBENT: /* reversed normals with smoothing */ |
624 |
|
|
case ISBENT: /* proper smoothing */ |
625 |
|
|
texOK = 1; |
626 |
|
|
break; |
627 |
|
|
} |
628 |
|
|
if (flatten) |
629 |
greg |
2.16 |
texOK = 0; |
630 |
greg |
2.7 |
#ifdef TEXMAPS |
631 |
greg |
2.3 |
patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
632 |
greg |
2.7 |
#else |
633 |
|
|
patOK = 0; |
634 |
|
|
#endif |
635 |
greg |
2.2 |
if (texOK | patOK) |
636 |
greg |
2.10 |
if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]], |
637 |
greg |
2.1 |
vlist[v3i[0]]) < 0) |
638 |
greg |
2.2 |
return(-1); |
639 |
greg |
2.1 |
/* put out texture (if any) */ |
640 |
greg |
2.2 |
if (texOK) { |
641 |
greg |
2.1 |
printf("\n%s texfunc %s\n", mod, TEXNAME); |
642 |
|
|
mod = TEXNAME; |
643 |
|
|
printf("4 dx dy dz %s\n", TCALNAME); |
644 |
greg |
2.13 |
printf("0\n"); |
645 |
|
|
for (i = 0; i < 3; i++) { |
646 |
|
|
bcoor[i][0] = vnlist[v1i[2]][i]; |
647 |
|
|
bcoor[i][1] = vnlist[v2i[2]][i]; |
648 |
|
|
bcoor[i][2] = vnlist[v3i[2]][i]; |
649 |
|
|
} |
650 |
|
|
put_baryc(&bvecs, bcoor, 3); |
651 |
greg |
2.1 |
} |
652 |
greg |
2.7 |
#ifdef TEXMAPS |
653 |
greg |
2.1 |
/* put out pattern (if any) */ |
654 |
greg |
2.2 |
if (patOK) { |
655 |
greg |
2.1 |
printf("\n%s colorpict %s\n", mod, PATNAME); |
656 |
|
|
mod = PATNAME; |
657 |
greg |
2.3 |
printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); |
658 |
greg |
2.13 |
printf("0\n"); |
659 |
|
|
for (i = 0; i < 2; i++) { |
660 |
|
|
bcoor[i][0] = vtlist[v1i[1]][i]; |
661 |
|
|
bcoor[i][1] = vtlist[v2i[1]][i]; |
662 |
|
|
bcoor[i][2] = vtlist[v3i[1]][i]; |
663 |
|
|
} |
664 |
|
|
put_baryc(&bvecs, bcoor, 2); |
665 |
greg |
2.1 |
} |
666 |
greg |
2.7 |
#endif |
667 |
greg |
2.18 |
/* put out (reversed) triangle */ |
668 |
greg |
2.3 |
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
669 |
greg |
2.1 |
printf("0\n0\n9\n"); |
670 |
greg |
2.18 |
if (flatness == RVFLAT || flatness == RVBENT) { |
671 |
|
|
pvect(vlist[v3i[0]]); |
672 |
|
|
pvect(vlist[v2i[0]]); |
673 |
|
|
pvect(vlist[v1i[0]]); |
674 |
|
|
} else { |
675 |
|
|
pvect(vlist[v1i[0]]); |
676 |
|
|
pvect(vlist[v2i[0]]); |
677 |
|
|
pvect(vlist[v3i[0]]); |
678 |
|
|
} |
679 |
greg |
2.1 |
return(1); |
680 |
|
|
} |
681 |
|
|
|
682 |
|
|
|
683 |
schorsch |
2.22 |
void |
684 |
|
|
freeverts(void) /* free all vertices */ |
685 |
greg |
2.1 |
{ |
686 |
|
|
if (nvs) { |
687 |
greg |
2.17 |
free((void *)vlist); |
688 |
greg |
2.1 |
nvs = 0; |
689 |
|
|
} |
690 |
|
|
if (nvts) { |
691 |
greg |
2.17 |
free((void *)vtlist); |
692 |
greg |
2.1 |
nvts = 0; |
693 |
|
|
} |
694 |
|
|
if (nvns) { |
695 |
greg |
2.17 |
free((void *)vnlist); |
696 |
greg |
2.1 |
nvns = 0; |
697 |
|
|
} |
698 |
|
|
} |
699 |
|
|
|
700 |
|
|
|
701 |
|
|
int |
702 |
schorsch |
2.22 |
newv( /* create a new vertex */ |
703 |
|
|
double x, |
704 |
|
|
double y, |
705 |
|
|
double z |
706 |
|
|
) |
707 |
greg |
2.1 |
{ |
708 |
|
|
if (!(nvs%CHUNKSIZ)) { /* allocate next block */ |
709 |
|
|
if (nvs == 0) |
710 |
|
|
vlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
711 |
|
|
else |
712 |
greg |
2.19 |
vlist = (FVECT *)realloc((void *)vlist, |
713 |
greg |
2.1 |
(nvs+CHUNKSIZ)*sizeof(FVECT)); |
714 |
|
|
if (vlist == NULL) { |
715 |
|
|
fprintf(stderr, |
716 |
|
|
"Out of memory while allocating vertex %d\n", nvs); |
717 |
|
|
exit(1); |
718 |
|
|
} |
719 |
|
|
} |
720 |
|
|
/* assign new vertex */ |
721 |
|
|
vlist[nvs][0] = x; |
722 |
|
|
vlist[nvs][1] = y; |
723 |
|
|
vlist[nvs][2] = z; |
724 |
|
|
return(++nvs); |
725 |
|
|
} |
726 |
|
|
|
727 |
|
|
|
728 |
|
|
int |
729 |
schorsch |
2.22 |
newvn( /* create a new vertex normal */ |
730 |
|
|
double x, |
731 |
|
|
double y, |
732 |
|
|
double z |
733 |
|
|
) |
734 |
greg |
2.1 |
{ |
735 |
|
|
if (!(nvns%CHUNKSIZ)) { /* allocate next block */ |
736 |
|
|
if (nvns == 0) |
737 |
|
|
vnlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
738 |
|
|
else |
739 |
greg |
2.19 |
vnlist = (FVECT *)realloc((void *)vnlist, |
740 |
greg |
2.1 |
(nvns+CHUNKSIZ)*sizeof(FVECT)); |
741 |
|
|
if (vnlist == NULL) { |
742 |
|
|
fprintf(stderr, |
743 |
|
|
"Out of memory while allocating normal %d\n", nvns); |
744 |
|
|
exit(1); |
745 |
|
|
} |
746 |
|
|
} |
747 |
|
|
/* assign new normal */ |
748 |
|
|
vnlist[nvns][0] = x; |
749 |
|
|
vnlist[nvns][1] = y; |
750 |
|
|
vnlist[nvns][2] = z; |
751 |
|
|
if (normalize(vnlist[nvns]) == 0.0) |
752 |
|
|
return(0); |
753 |
|
|
return(++nvns); |
754 |
|
|
} |
755 |
|
|
|
756 |
|
|
|
757 |
|
|
int |
758 |
schorsch |
2.22 |
newvt( /* create a new texture map vertex */ |
759 |
|
|
double x, |
760 |
|
|
double y |
761 |
|
|
) |
762 |
greg |
2.1 |
{ |
763 |
|
|
if (!(nvts%CHUNKSIZ)) { /* allocate next block */ |
764 |
|
|
if (nvts == 0) |
765 |
schorsch |
2.20 |
vtlist = (RREAL (*)[2])malloc(CHUNKSIZ*2*sizeof(RREAL)); |
766 |
greg |
2.1 |
else |
767 |
schorsch |
2.20 |
vtlist = (RREAL (*)[2])realloc((void *)vtlist, |
768 |
|
|
(nvts+CHUNKSIZ)*2*sizeof(RREAL)); |
769 |
greg |
2.1 |
if (vtlist == NULL) { |
770 |
|
|
fprintf(stderr, |
771 |
|
|
"Out of memory while allocating texture vertex %d\n", |
772 |
|
|
nvts); |
773 |
|
|
exit(1); |
774 |
|
|
} |
775 |
|
|
} |
776 |
greg |
2.3 |
/* assign new vertex */ |
777 |
greg |
2.1 |
vtlist[nvts][0] = x; |
778 |
|
|
vtlist[nvts][1] = y; |
779 |
|
|
return(++nvts); |
780 |
|
|
} |
781 |
|
|
|
782 |
|
|
|
783 |
schorsch |
2.22 |
void |
784 |
|
|
syntax( /* report syntax error and exit */ |
785 |
|
|
char *er |
786 |
|
|
) |
787 |
greg |
2.1 |
{ |
788 |
|
|
fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", |
789 |
greg |
2.6 |
inpfile, lineno, er); |
790 |
greg |
2.1 |
exit(1); |
791 |
|
|
} |