1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.30 |
static const char RCSid[] = "$Id: obj2rad.c,v 2.29 2013/11/08 16:49:04 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
|
|
/* |
5 |
greg |
2.28 |
* Convert a Wavefront .OBJ file to Radiance format. |
6 |
greg |
2.1 |
* |
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 <ctype.h> |
15 |
greg |
2.1 |
|
16 |
schorsch |
2.22 |
#include "rtmath.h" |
17 |
|
|
#include "rtio.h" |
18 |
|
|
#include "resolu.h" |
19 |
greg |
2.3 |
#include "trans.h" |
20 |
greg |
2.15 |
#include "tmesh.h" |
21 |
|
|
|
22 |
greg |
2.1 |
|
23 |
|
|
#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
24 |
|
|
#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
25 |
greg |
2.3 |
#define DEFOBJ "unnamed" /* default object name */ |
26 |
|
|
#define DEFMAT "white" /* default material name */ |
27 |
greg |
2.1 |
|
28 |
|
|
#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
29 |
|
|
|
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 |
schorsch |
2.20 |
RREAL (*vtlist)[2]; /* map vertex list */ |
35 |
greg |
2.1 |
int nvts; |
36 |
|
|
|
37 |
greg |
2.24 |
int ndegen = 0; /* count of degenerate faces */ |
38 |
greg |
2.26 |
int n0norm = 0; /* count of zero normals */ |
39 |
greg |
2.24 |
|
40 |
greg |
2.3 |
typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
41 |
greg |
2.1 |
|
42 |
greg |
2.23 |
#define CHUNKSIZ 1024 /* vertex allocation chunk size */ |
43 |
greg |
2.1 |
|
44 |
greg |
2.23 |
#define MAXARG 512 /* maximum # arguments in a statement */ |
45 |
greg |
2.1 |
|
46 |
greg |
2.3 |
/* 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 |
greg |
2.1 |
|
54 |
greg |
2.3 |
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 |
greg |
2.8 |
int flatten = 0; /* discard surface normal information */ |
72 |
|
|
|
73 |
greg |
2.29 |
char mapname[256]; /* current picture file */ |
74 |
|
|
char matname[256]; /* current material name */ |
75 |
greg |
2.28 |
char group[8][256]; /* current group name(s) */ |
76 |
greg |
2.29 |
char objname[256]; /* current object name */ |
77 |
greg |
2.6 |
char *inpfile; /* input file name */ |
78 |
greg |
2.1 |
int lineno; /* current line number */ |
79 |
greg |
2.6 |
int faceno; /* current face number */ |
80 |
greg |
2.1 |
|
81 |
schorsch |
2.22 |
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 |
greg |
2.1 |
|
98 |
schorsch |
2.22 |
int |
99 |
greg |
2.28 |
main( /* read in .OBJ file and convert */ |
100 |
schorsch |
2.22 |
int argc, |
101 |
|
|
char *argv[] |
102 |
|
|
) |
103 |
greg |
2.1 |
{ |
104 |
greg |
2.6 |
int donames = 0; |
105 |
greg |
2.1 |
int i; |
106 |
|
|
|
107 |
|
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
108 |
|
|
switch (argv[i][1]) { |
109 |
|
|
case 'o': /* object name */ |
110 |
|
|
defobj = argv[++i]; |
111 |
|
|
break; |
112 |
greg |
2.3 |
case 'n': /* just produce name list */ |
113 |
|
|
donames++; |
114 |
greg |
2.1 |
break; |
115 |
greg |
2.3 |
case 'm': /* use custom mapfile */ |
116 |
|
|
ourmapping = getmapping(argv[++i], &qlist); |
117 |
greg |
2.1 |
break; |
118 |
greg |
2.8 |
case 'f': /* flatten surfaces */ |
119 |
|
|
flatten++; |
120 |
|
|
break; |
121 |
greg |
2.1 |
default: |
122 |
greg |
2.3 |
goto userr; |
123 |
greg |
2.1 |
} |
124 |
schorsch |
2.21 |
if ((i > argc) | (i < argc-1)) |
125 |
greg |
2.3 |
goto userr; |
126 |
|
|
if (i == argc) |
127 |
greg |
2.6 |
inpfile = "<stdin>"; |
128 |
|
|
else if (freopen(inpfile=argv[i], "r", stdin) == NULL) { |
129 |
|
|
fprintf(stderr, "%s: cannot open\n", inpfile); |
130 |
greg |
2.3 |
exit(1); |
131 |
|
|
} |
132 |
|
|
if (donames) { /* scan for ids */ |
133 |
|
|
getnames(stdin); |
134 |
greg |
2.6 |
printf("filename \"%s\"\n", inpfile); |
135 |
greg |
2.3 |
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 |
greg |
2.6 |
convert(stdin); |
144 |
greg |
2.3 |
} |
145 |
greg |
2.24 |
if (ndegen) |
146 |
|
|
printf("# %d degenerate faces\n", ndegen); |
147 |
greg |
2.26 |
if (n0norm) |
148 |
|
|
printf("# %d invalid (zero) normals\n", n0norm); |
149 |
greg |
2.3 |
exit(0); |
150 |
|
|
userr: |
151 |
greg |
2.9 |
fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n", |
152 |
greg |
2.3 |
argv[0]); |
153 |
|
|
exit(1); |
154 |
|
|
} |
155 |
|
|
|
156 |
|
|
|
157 |
schorsch |
2.22 |
void |
158 |
|
|
getnames( /* get valid qualifier names */ |
159 |
|
|
FILE *fp |
160 |
|
|
) |
161 |
greg |
2.3 |
{ |
162 |
|
|
char *argv[MAXARG]; |
163 |
|
|
int argc; |
164 |
|
|
ID tmpid; |
165 |
greg |
2.28 |
int i; |
166 |
greg |
2.3 |
|
167 |
schorsch |
2.21 |
while ( (argc = getstmt(argv, fp)) ) |
168 |
greg |
2.3 |
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 |
greg |
2.1 |
} |
187 |
greg |
2.3 |
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 |
greg |
2.1 |
} |
205 |
|
|
} |
206 |
|
|
|
207 |
|
|
|
208 |
schorsch |
2.22 |
void |
209 |
greg |
2.28 |
convert( /* convert an OBJ stream */ |
210 |
schorsch |
2.22 |
FILE *fp |
211 |
|
|
) |
212 |
greg |
2.1 |
{ |
213 |
|
|
char *argv[MAXARG]; |
214 |
|
|
int argc; |
215 |
|
|
int nstats, nunknown; |
216 |
greg |
2.28 |
int i; |
217 |
greg |
2.6 |
|
218 |
greg |
2.1 |
nstats = nunknown = 0; |
219 |
|
|
/* scan until EOF */ |
220 |
schorsch |
2.21 |
while ( (argc = getstmt(argv, fp)) ) { |
221 |
greg |
2.1 |
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 |
greg |
2.6 |
syntax("Bad vertex"); |
227 |
greg |
2.1 |
newv(atof(argv[1]), atof(argv[2]), |
228 |
|
|
atof(argv[3])); |
229 |
|
|
break; |
230 |
|
|
case 'n': /* normal */ |
231 |
|
|
if (argv[0][2]) |
232 |
|
|
goto unknown; |
233 |
|
|
if (badarg(argc-1,argv+1,"fff")) |
234 |
greg |
2.6 |
syntax("Bad normal"); |
235 |
greg |
2.1 |
if (!newvn(atof(argv[1]), atof(argv[2]), |
236 |
|
|
atof(argv[3]))) |
237 |
greg |
2.6 |
syntax("Zero normal"); |
238 |
greg |
2.1 |
break; |
239 |
greg |
2.3 |
case 't': /* texture map */ |
240 |
greg |
2.1 |
if (argv[0][2]) |
241 |
|
|
goto unknown; |
242 |
|
|
if (badarg(argc-1,argv+1,"ff")) |
243 |
|
|
goto unknown; |
244 |
|
|
newvt(atof(argv[1]), atof(argv[2])); |
245 |
|
|
break; |
246 |
|
|
default: |
247 |
|
|
goto unknown; |
248 |
|
|
} |
249 |
|
|
break; |
250 |
|
|
case 'f': /* face */ |
251 |
|
|
if (argv[0][1]) |
252 |
|
|
goto unknown; |
253 |
greg |
2.3 |
faceno++; |
254 |
greg |
2.1 |
switch (argc-1) { |
255 |
|
|
case 0: case 1: case 2: |
256 |
greg |
2.6 |
syntax("Too few vertices"); |
257 |
greg |
2.1 |
break; |
258 |
|
|
case 3: |
259 |
|
|
if (!puttri(argv[1], argv[2], argv[3])) |
260 |
greg |
2.6 |
syntax("Bad triangle"); |
261 |
greg |
2.1 |
break; |
262 |
|
|
default: |
263 |
|
|
if (!putface(argc-1, argv+1)) |
264 |
greg |
2.6 |
syntax("Bad face"); |
265 |
greg |
2.1 |
break; |
266 |
|
|
} |
267 |
|
|
break; |
268 |
|
|
case 'u': |
269 |
|
|
if (!strcmp(argv[0], "usemtl")) { /* material */ |
270 |
|
|
if (argc < 2) |
271 |
|
|
break; /* not fatal */ |
272 |
|
|
strcpy(matname, argv[1]); |
273 |
|
|
} else if (!strcmp(argv[0], "usemap")) {/* map */ |
274 |
|
|
if (argc < 2) |
275 |
|
|
break; /* not fatal */ |
276 |
|
|
if (!strcmp(argv[1], "off")) |
277 |
greg |
2.3 |
mapname[0] = '\0'; |
278 |
greg |
2.1 |
else |
279 |
greg |
2.25 |
sprintf(mapname, "%s.hdr", argv[1]); |
280 |
greg |
2.1 |
} else |
281 |
|
|
goto unknown; |
282 |
|
|
break; |
283 |
|
|
case 'o': /* object name */ |
284 |
|
|
if (argv[0][1]) |
285 |
|
|
goto unknown; |
286 |
|
|
if (argc < 2) |
287 |
|
|
break; /* not fatal */ |
288 |
|
|
strcpy(objname, argv[1]); |
289 |
|
|
break; |
290 |
|
|
case 'g': /* group name(s) */ |
291 |
|
|
if (argv[0][1]) |
292 |
|
|
goto unknown; |
293 |
|
|
for (i = 1; i < argc; i++) |
294 |
greg |
2.3 |
strcpy(group[i-1], argv[i]); |
295 |
greg |
2.28 |
group[argc-1][0] = '\0'; |
296 |
greg |
2.1 |
break; |
297 |
|
|
case '#': /* comment */ |
298 |
greg |
2.7 |
printargs(argc, argv, stdout); |
299 |
greg |
2.1 |
break; |
300 |
|
|
default:; /* something we don't deal with */ |
301 |
|
|
unknown: |
302 |
|
|
nunknown++; |
303 |
|
|
break; |
304 |
|
|
} |
305 |
|
|
nstats++; |
306 |
|
|
} |
307 |
greg |
2.6 |
printf("\n# Done processing file: %s\n", inpfile); |
308 |
greg |
2.1 |
printf("# %d lines, %d statements, %d unrecognized\n", |
309 |
|
|
lineno, nstats, nunknown); |
310 |
|
|
} |
311 |
|
|
|
312 |
|
|
|
313 |
|
|
int |
314 |
schorsch |
2.22 |
getstmt( /* read the next statement from fp */ |
315 |
greg |
2.28 |
char *av[MAXARG], |
316 |
schorsch |
2.22 |
FILE *fp |
317 |
|
|
) |
318 |
greg |
2.1 |
{ |
319 |
greg |
2.23 |
static char sbuf[MAXARG*16]; |
320 |
greg |
2.28 |
char *cp; |
321 |
|
|
int i; |
322 |
greg |
2.1 |
|
323 |
|
|
do { |
324 |
|
|
if (fgetline(cp=sbuf, sizeof(sbuf), fp) == NULL) |
325 |
|
|
return(0); |
326 |
|
|
i = 0; |
327 |
|
|
for ( ; ; ) { |
328 |
|
|
while (isspace(*cp) || *cp == '\\') { |
329 |
|
|
if (*cp == '\n') |
330 |
|
|
lineno++; |
331 |
|
|
*cp++ = '\0'; |
332 |
|
|
} |
333 |
greg |
2.23 |
if (!*cp) |
334 |
greg |
2.1 |
break; |
335 |
greg |
2.23 |
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 |
greg |
2.1 |
av[i++] = cp; |
342 |
|
|
while (*++cp && !isspace(*cp)) |
343 |
|
|
; |
344 |
|
|
} |
345 |
|
|
av[i] = NULL; |
346 |
|
|
lineno++; |
347 |
|
|
} while (!i); |
348 |
|
|
|
349 |
|
|
return(i); |
350 |
|
|
} |
351 |
|
|
|
352 |
greg |
2.3 |
|
353 |
|
|
char * |
354 |
schorsch |
2.22 |
getmtl(void) /* figure material for this face */ |
355 |
greg |
2.3 |
{ |
356 |
greg |
2.28 |
RULEHD *rp = ourmapping; |
357 |
greg |
2.3 |
|
358 |
greg |
2.6 |
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 |
greg |
2.3 |
/* 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 |
schorsch |
2.22 |
getonm(void) /* invent a good name for object */ |
381 |
greg |
2.3 |
{ |
382 |
|
|
static char name[64]; |
383 |
greg |
2.28 |
char *cp1, *cp2; |
384 |
|
|
int i; |
385 |
greg |
2.6 |
/* check for preset */ |
386 |
|
|
if (objname[0]) |
387 |
|
|
return(objname); |
388 |
|
|
if (!group[0][0]) |
389 |
|
|
return(defobj); |
390 |
greg |
2.3 |
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 |
schorsch |
2.21 |
while ( (*cp1 = *cp2++) ) |
396 |
greg |
2.3 |
if (++cp1 >= name+sizeof(name)-2) { |
397 |
|
|
*cp1 = '\0'; |
398 |
|
|
return(name); |
399 |
|
|
} |
400 |
|
|
} |
401 |
|
|
return(name); |
402 |
|
|
} |
403 |
|
|
|
404 |
|
|
|
405 |
schorsch |
2.22 |
int |
406 |
|
|
matchrule( /* check for a match on this rule */ |
407 |
greg |
2.28 |
RULEHD *rp |
408 |
schorsch |
2.22 |
) |
409 |
greg |
2.3 |
{ |
410 |
|
|
ID tmpid; |
411 |
|
|
int gotmatch; |
412 |
greg |
2.28 |
int i; |
413 |
greg |
2.3 |
|
414 |
|
|
if (rp->qflg & FL(Q_MTL)) { |
415 |
greg |
2.6 |
if (!matname[0]) |
416 |
|
|
return(0); |
417 |
greg |
2.3 |
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 |
greg |
2.6 |
if (!mapname[0]) |
424 |
|
|
return(0); |
425 |
greg |
2.3 |
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 |
greg |
2.6 |
if (!objname[0]) |
442 |
|
|
return(0); |
443 |
greg |
2.3 |
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 |
schorsch |
2.22 |
int |
459 |
|
|
cvtndx( /* convert vertex string to index */ |
460 |
greg |
2.28 |
VNDX vi, |
461 |
|
|
char *vs |
462 |
schorsch |
2.22 |
) |
463 |
greg |
2.1 |
{ |
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 |
greg |
2.9 |
vi[0] += nvs; |
471 |
greg |
2.1 |
if (vi[0] < 0) |
472 |
|
|
return(0); |
473 |
|
|
} else |
474 |
|
|
return(0); |
475 |
greg |
2.3 |
/* get map */ |
476 |
greg |
2.1 |
while (*vs) |
477 |
|
|
if (*vs++ == '/') |
478 |
|
|
break; |
479 |
|
|
vi[1] = atoi(vs); |
480 |
|
|
if (vi[1] > 0) { |
481 |
|
|
if (vi[1]-- > nvts) |
482 |
|
|
return(0); |
483 |
|
|
} else if (vi[1] < 0) { |
484 |
greg |
2.9 |
vi[1] += nvts; |
485 |
greg |
2.1 |
if (vi[1] < 0) |
486 |
|
|
return(0); |
487 |
|
|
} else |
488 |
|
|
vi[1] = -1; |
489 |
|
|
/* get normal */ |
490 |
|
|
while (*vs) |
491 |
|
|
if (*vs++ == '/') |
492 |
|
|
break; |
493 |
|
|
vi[2] = atoi(vs); |
494 |
|
|
if (vi[2] > 0) { |
495 |
|
|
if (vi[2]-- > nvns) |
496 |
|
|
return(0); |
497 |
|
|
} else if (vi[2] < 0) { |
498 |
greg |
2.9 |
vi[2] += nvns; |
499 |
greg |
2.1 |
if (vi[2] < 0) |
500 |
|
|
return(0); |
501 |
|
|
} else |
502 |
|
|
vi[2] = -1; |
503 |
greg |
2.26 |
/* zero normal is not normal */ |
504 |
|
|
if (vi[2] >= 0 && DOT(vnlist[vi[2]],vnlist[vi[2]]) <= FTINY) |
505 |
|
|
vi[2] = -1; |
506 |
greg |
2.1 |
return(1); |
507 |
|
|
} |
508 |
|
|
|
509 |
|
|
|
510 |
schorsch |
2.22 |
int |
511 |
|
|
nonplanar( /* are vertices non-planar? */ |
512 |
greg |
2.28 |
int ac, |
513 |
|
|
char **av |
514 |
schorsch |
2.22 |
) |
515 |
greg |
2.1 |
{ |
516 |
|
|
VNDX vi; |
517 |
schorsch |
2.20 |
RREAL *p0, *p1; |
518 |
greg |
2.5 |
FVECT v1, v2, nsum, newn; |
519 |
|
|
double d; |
520 |
greg |
2.28 |
int i; |
521 |
greg |
2.5 |
|
522 |
|
|
if (!cvtndx(vi, av[0])) |
523 |
|
|
return(0); |
524 |
greg |
2.12 |
if (!flatten && vi[2] >= 0) |
525 |
greg |
2.5 |
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 |
schorsch |
2.22 |
int |
564 |
|
|
putface( /* put out an N-sided polygon */ |
565 |
|
|
int ac, |
566 |
greg |
2.28 |
char **av |
567 |
schorsch |
2.22 |
) |
568 |
greg |
2.5 |
{ |
569 |
|
|
VNDX vi; |
570 |
greg |
2.7 |
char *cp; |
571 |
greg |
2.28 |
int i; |
572 |
greg |
2.1 |
|
573 |
greg |
2.11 |
if (nonplanar(ac, av)) { /* break into triangles */ |
574 |
|
|
while (ac > 2) { |
575 |
|
|
if (!puttri(av[0], av[1], av[2])) |
576 |
greg |
2.5 |
return(0); |
577 |
greg |
2.11 |
ac--; /* remove vertex & rotate */ |
578 |
greg |
2.7 |
cp = av[0]; |
579 |
|
|
for (i = 0; i < ac-1; i++) |
580 |
greg |
2.11 |
av[i] = av[i+2]; |
581 |
greg |
2.7 |
av[i] = cp; |
582 |
greg |
2.5 |
} |
583 |
|
|
return(1); |
584 |
|
|
} |
585 |
greg |
2.7 |
if ((cp = getmtl()) == NULL) |
586 |
greg |
2.27 |
return(-1); |
587 |
greg |
2.7 |
printf("\n%s polygon %s.%d\n", cp, getonm(), faceno); |
588 |
greg |
2.1 |
printf("0\n0\n%d\n", 3*ac); |
589 |
greg |
2.5 |
for (i = 0; i < ac; i++) { |
590 |
|
|
if (!cvtndx(vi, av[i])) |
591 |
greg |
2.1 |
return(0); |
592 |
|
|
pvect(vlist[vi[0]]); |
593 |
|
|
} |
594 |
|
|
return(1); |
595 |
|
|
} |
596 |
|
|
|
597 |
|
|
|
598 |
schorsch |
2.22 |
int |
599 |
|
|
puttri( /* put out a triangle */ |
600 |
|
|
char *v1, |
601 |
|
|
char *v2, |
602 |
|
|
char *v3 |
603 |
|
|
) |
604 |
greg |
2.1 |
{ |
605 |
greg |
2.3 |
char *mod; |
606 |
greg |
2.1 |
VNDX v1i, v2i, v3i; |
607 |
|
|
BARYCCM bvecs; |
608 |
schorsch |
2.20 |
RREAL bcoor[3][3]; |
609 |
schorsch |
2.22 |
int texOK = 0, patOK; |
610 |
greg |
2.18 |
int flatness; |
611 |
greg |
2.28 |
int i; |
612 |
greg |
2.1 |
|
613 |
greg |
2.3 |
if ((mod = getmtl()) == NULL) |
614 |
greg |
2.27 |
return(-1); |
615 |
greg |
2.3 |
|
616 |
greg |
2.1 |
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
617 |
|
|
return(0); |
618 |
|
|
/* compute barycentric coordinates */ |
619 |
greg |
2.18 |
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 |
greg |
2.16 |
else |
623 |
greg |
2.18 |
flatness = ISFLAT; |
624 |
|
|
|
625 |
|
|
switch (flatness) { |
626 |
|
|
case DEGEN: /* zero area */ |
627 |
greg |
2.24 |
ndegen++; |
628 |
greg |
2.18 |
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 |
greg |
2.16 |
texOK = 0; |
640 |
greg |
2.7 |
#ifdef TEXMAPS |
641 |
greg |
2.3 |
patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
642 |
greg |
2.7 |
#else |
643 |
|
|
patOK = 0; |
644 |
|
|
#endif |
645 |
greg |
2.2 |
if (texOK | patOK) |
646 |
greg |
2.10 |
if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]], |
647 |
greg |
2.1 |
vlist[v3i[0]]) < 0) |
648 |
greg |
2.24 |
texOK = patOK = 0; |
649 |
greg |
2.1 |
/* put out texture (if any) */ |
650 |
greg |
2.2 |
if (texOK) { |
651 |
greg |
2.1 |
printf("\n%s texfunc %s\n", mod, TEXNAME); |
652 |
|
|
mod = TEXNAME; |
653 |
|
|
printf("4 dx dy dz %s\n", TCALNAME); |
654 |
greg |
2.13 |
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 |
greg |
2.1 |
} |
662 |
greg |
2.7 |
#ifdef TEXMAPS |
663 |
greg |
2.1 |
/* put out pattern (if any) */ |
664 |
greg |
2.2 |
if (patOK) { |
665 |
greg |
2.1 |
printf("\n%s colorpict %s\n", mod, PATNAME); |
666 |
|
|
mod = PATNAME; |
667 |
greg |
2.3 |
printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); |
668 |
greg |
2.13 |
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 |
greg |
2.1 |
} |
676 |
greg |
2.7 |
#endif |
677 |
greg |
2.18 |
/* put out (reversed) triangle */ |
678 |
greg |
2.3 |
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
679 |
greg |
2.1 |
printf("0\n0\n9\n"); |
680 |
greg |
2.18 |
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 |
|
|
} |
689 |
greg |
2.1 |
return(1); |
690 |
|
|
} |
691 |
|
|
|
692 |
|
|
|
693 |
schorsch |
2.22 |
void |
694 |
|
|
freeverts(void) /* free all vertices */ |
695 |
greg |
2.1 |
{ |
696 |
|
|
if (nvs) { |
697 |
greg |
2.17 |
free((void *)vlist); |
698 |
greg |
2.1 |
nvs = 0; |
699 |
|
|
} |
700 |
|
|
if (nvts) { |
701 |
greg |
2.17 |
free((void *)vtlist); |
702 |
greg |
2.1 |
nvts = 0; |
703 |
|
|
} |
704 |
|
|
if (nvns) { |
705 |
greg |
2.17 |
free((void *)vnlist); |
706 |
greg |
2.1 |
nvns = 0; |
707 |
|
|
} |
708 |
|
|
} |
709 |
|
|
|
710 |
|
|
|
711 |
|
|
int |
712 |
schorsch |
2.22 |
newv( /* create a new vertex */ |
713 |
|
|
double x, |
714 |
|
|
double y, |
715 |
|
|
double z |
716 |
|
|
) |
717 |
greg |
2.1 |
{ |
718 |
|
|
if (!(nvs%CHUNKSIZ)) { /* allocate next block */ |
719 |
|
|
if (nvs == 0) |
720 |
|
|
vlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
721 |
|
|
else |
722 |
greg |
2.19 |
vlist = (FVECT *)realloc((void *)vlist, |
723 |
greg |
2.1 |
(nvs+CHUNKSIZ)*sizeof(FVECT)); |
724 |
|
|
if (vlist == NULL) { |
725 |
|
|
fprintf(stderr, |
726 |
|
|
"Out of memory while allocating vertex %d\n", nvs); |
727 |
|
|
exit(1); |
728 |
|
|
} |
729 |
|
|
} |
730 |
|
|
/* assign new vertex */ |
731 |
|
|
vlist[nvs][0] = x; |
732 |
|
|
vlist[nvs][1] = y; |
733 |
|
|
vlist[nvs][2] = z; |
734 |
|
|
return(++nvs); |
735 |
|
|
} |
736 |
|
|
|
737 |
|
|
|
738 |
|
|
int |
739 |
schorsch |
2.22 |
newvn( /* create a new vertex normal */ |
740 |
|
|
double x, |
741 |
|
|
double y, |
742 |
|
|
double z |
743 |
|
|
) |
744 |
greg |
2.1 |
{ |
745 |
|
|
if (!(nvns%CHUNKSIZ)) { /* allocate next block */ |
746 |
|
|
if (nvns == 0) |
747 |
|
|
vnlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
748 |
|
|
else |
749 |
greg |
2.19 |
vnlist = (FVECT *)realloc((void *)vnlist, |
750 |
greg |
2.1 |
(nvns+CHUNKSIZ)*sizeof(FVECT)); |
751 |
|
|
if (vnlist == NULL) { |
752 |
|
|
fprintf(stderr, |
753 |
|
|
"Out of memory while allocating normal %d\n", nvns); |
754 |
|
|
exit(1); |
755 |
|
|
} |
756 |
|
|
} |
757 |
|
|
/* assign new normal */ |
758 |
|
|
vnlist[nvns][0] = x; |
759 |
|
|
vnlist[nvns][1] = y; |
760 |
|
|
vnlist[nvns][2] = z; |
761 |
greg |
2.26 |
n0norm += (normalize(vnlist[nvns]) == 0.0); |
762 |
greg |
2.1 |
return(++nvns); |
763 |
|
|
} |
764 |
|
|
|
765 |
|
|
|
766 |
|
|
int |
767 |
schorsch |
2.22 |
newvt( /* create a new texture map vertex */ |
768 |
|
|
double x, |
769 |
|
|
double y |
770 |
|
|
) |
771 |
greg |
2.1 |
{ |
772 |
|
|
if (!(nvts%CHUNKSIZ)) { /* allocate next block */ |
773 |
|
|
if (nvts == 0) |
774 |
schorsch |
2.20 |
vtlist = (RREAL (*)[2])malloc(CHUNKSIZ*2*sizeof(RREAL)); |
775 |
greg |
2.1 |
else |
776 |
schorsch |
2.20 |
vtlist = (RREAL (*)[2])realloc((void *)vtlist, |
777 |
|
|
(nvts+CHUNKSIZ)*2*sizeof(RREAL)); |
778 |
greg |
2.1 |
if (vtlist == NULL) { |
779 |
|
|
fprintf(stderr, |
780 |
|
|
"Out of memory while allocating texture vertex %d\n", |
781 |
|
|
nvts); |
782 |
|
|
exit(1); |
783 |
|
|
} |
784 |
|
|
} |
785 |
greg |
2.3 |
/* assign new vertex */ |
786 |
greg |
2.1 |
vtlist[nvts][0] = x; |
787 |
|
|
vtlist[nvts][1] = y; |
788 |
|
|
return(++nvts); |
789 |
|
|
} |
790 |
|
|
|
791 |
|
|
|
792 |
schorsch |
2.22 |
void |
793 |
|
|
syntax( /* report syntax error and exit */ |
794 |
|
|
char *er |
795 |
|
|
) |
796 |
greg |
2.1 |
{ |
797 |
|
|
fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", |
798 |
greg |
2.6 |
inpfile, lineno, er); |
799 |
greg |
2.1 |
exit(1); |
800 |
|
|
} |