1 |
– |
/* Copyright (c) 1994 Regents of the University of California */ |
2 |
– |
|
1 |
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#endif |
6 |
– |
|
4 |
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/* |
5 |
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* Convert a Wavefront .obj file to Radiance format. |
6 |
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* |
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 |
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*/ |
12 |
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|
13 |
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#include "standard.h" |
14 |
|
|
15 |
< |
#include <ctype.h> |
15 |
> |
#include "trans.h" |
16 |
|
|
17 |
< |
#define VOIDID "void" /* this is defined in object.h */ |
17 |
> |
#include "tmesh.h" |
18 |
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|
19 |
< |
#define TCALNAME "tmesh.cal" /* triangle interp. file */ |
20 |
< |
#define QCALNAME "surf.cal" /* quad interp. file */ |
19 |
> |
#include <ctype.h> |
20 |
> |
|
21 |
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#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
22 |
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#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
23 |
+ |
#define DEFOBJ "unnamed" /* default object name */ |
24 |
+ |
#define DEFMAT "white" /* default material name */ |
25 |
|
|
27 |
– |
#define ABS(x) ((x)>=0 ? (x) : -(x)) |
28 |
– |
|
26 |
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#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
27 |
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|
28 |
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FVECT *vlist; /* our vertex list */ |
29 |
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int nvs; /* number of vertices in our list */ |
30 |
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FVECT *vnlist; /* vertex normal list */ |
31 |
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int nvns; |
32 |
< |
FLOAT (*vtlist)[2]; /* texture vertex list */ |
32 |
> |
RREAL (*vtlist)[2]; /* map vertex list */ |
33 |
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int nvts; |
34 |
|
|
35 |
< |
typedef FLOAT BARYCCM[3][4]; /* barycentric coordinate system */ |
35 |
> |
typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
36 |
|
|
37 |
< |
typedef int VNDX[3]; /* vertex index (point,texture,normal) */ |
37 |
> |
#define CHUNKSIZ 256 /* vertex allocation chunk size */ |
38 |
|
|
42 |
– |
#define CHUNKSIZ 128 /* vertex allocation chunk size */ |
43 |
– |
|
39 |
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#define MAXARG 64 /* maximum # arguments in a statement */ |
40 |
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|
41 |
< |
char *defmat = VOIDID; /* default (starting) material name */ |
42 |
< |
char *defpat = ""; /* default (starting) picture name */ |
43 |
< |
char *defobj = "F"; /* default (starting) object name */ |
41 |
> |
/* qualifiers */ |
42 |
> |
#define Q_MTL 0 |
43 |
> |
#define Q_MAP 1 |
44 |
> |
#define Q_GRP 2 |
45 |
> |
#define Q_OBJ 3 |
46 |
> |
#define Q_FAC 4 |
47 |
> |
#define NQUALS 5 |
48 |
|
|
49 |
< |
char picfile[128]; /* current picture file */ |
49 |
> |
char *qname[NQUALS] = { |
50 |
> |
"Material", |
51 |
> |
"Map", |
52 |
> |
"Group", |
53 |
> |
"Object", |
54 |
> |
"Face", |
55 |
> |
}; |
56 |
> |
|
57 |
> |
QLIST qlist = {NQUALS, qname}; |
58 |
> |
/* valid qualifier ids */ |
59 |
> |
IDLIST qual[NQUALS]; |
60 |
> |
/* mapping rules */ |
61 |
> |
RULEHD *ourmapping = NULL; |
62 |
> |
|
63 |
> |
char *defmat = DEFMAT; /* default (starting) material name */ |
64 |
> |
char *defobj = DEFOBJ; /* default (starting) object name */ |
65 |
> |
|
66 |
> |
int flatten = 0; /* discard surface normal information */ |
67 |
> |
|
68 |
> |
char *getmtl(), *getonm(); |
69 |
> |
|
70 |
> |
char mapname[128]; /* current picture file */ |
71 |
|
char matname[64]; /* current material name */ |
72 |
+ |
char group[16][32]; /* current group names */ |
73 |
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char objname[128]; /* current object name */ |
74 |
+ |
char *inpfile; /* input file name */ |
75 |
|
int lineno; /* current line number */ |
76 |
+ |
int faceno; /* current face number */ |
77 |
|
|
55 |
– |
int nfaces; /* total number of faces output */ |
78 |
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|
79 |
< |
|
58 |
< |
main(argc, argv) /* read in T-mesh files and convert */ |
79 |
> |
main(argc, argv) /* read in .obj file and convert */ |
80 |
|
int argc; |
81 |
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char *argv[]; |
82 |
|
{ |
83 |
< |
FILE *fp; |
83 |
> |
int donames = 0; |
84 |
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int i; |
85 |
|
|
86 |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
88 |
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case 'o': /* object name */ |
89 |
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defobj = argv[++i]; |
90 |
|
break; |
91 |
< |
case 'm': /* default material */ |
92 |
< |
defmat = argv[++i]; |
91 |
> |
case 'n': /* just produce name list */ |
92 |
> |
donames++; |
93 |
|
break; |
94 |
< |
case 'p': /* default picture */ |
95 |
< |
defpat = argv[++i]; |
94 |
> |
case 'm': /* use custom mapfile */ |
95 |
> |
ourmapping = getmapping(argv[++i], &qlist); |
96 |
|
break; |
97 |
+ |
case 'f': /* flatten surfaces */ |
98 |
+ |
flatten++; |
99 |
+ |
break; |
100 |
|
default: |
101 |
< |
fprintf(stderr, |
78 |
< |
"Usage: %s [-o obj][-m mat][-p pic] [file ..]\n", |
79 |
< |
argv[0]); |
80 |
< |
exit(1); |
101 |
> |
goto userr; |
102 |
|
} |
103 |
< |
if (i >= argc) |
104 |
< |
convert("<stdin>", stdin); |
105 |
< |
else |
106 |
< |
for ( ; i < argc; i++) { |
107 |
< |
if ((fp = fopen(argv[i], "r")) == NULL) { |
108 |
< |
perror(argv[i]); |
109 |
< |
exit(1); |
103 |
> |
if ((i > argc) | (i < argc-1)) |
104 |
> |
goto userr; |
105 |
> |
if (i == argc) |
106 |
> |
inpfile = "<stdin>"; |
107 |
> |
else if (freopen(inpfile=argv[i], "r", stdin) == NULL) { |
108 |
> |
fprintf(stderr, "%s: cannot open\n", inpfile); |
109 |
> |
exit(1); |
110 |
> |
} |
111 |
> |
if (donames) { /* scan for ids */ |
112 |
> |
getnames(stdin); |
113 |
> |
printf("filename \"%s\"\n", inpfile); |
114 |
> |
printf("filetype \"Wavefront\"\n"); |
115 |
> |
write_quals(&qlist, qual, stdout); |
116 |
> |
printf("qualifier %s begin\n", qlist.qual[Q_FAC]); |
117 |
> |
printf("[%d:%d]\n", 1, faceno); |
118 |
> |
printf("end\n"); |
119 |
> |
} else { /* translate file */ |
120 |
> |
printf("# "); |
121 |
> |
printargs(argc, argv, stdout); |
122 |
> |
convert(stdin); |
123 |
> |
} |
124 |
> |
exit(0); |
125 |
> |
userr: |
126 |
> |
fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n", |
127 |
> |
argv[0]); |
128 |
> |
exit(1); |
129 |
> |
} |
130 |
> |
|
131 |
> |
|
132 |
> |
getnames(fp) /* get valid qualifier names */ |
133 |
> |
FILE *fp; |
134 |
> |
{ |
135 |
> |
char *argv[MAXARG]; |
136 |
> |
int argc; |
137 |
> |
ID tmpid; |
138 |
> |
register int i; |
139 |
> |
|
140 |
> |
while ( (argc = getstmt(argv, fp)) ) |
141 |
> |
switch (argv[0][0]) { |
142 |
> |
case 'f': /* face */ |
143 |
> |
if (!argv[0][1]) |
144 |
> |
faceno++; |
145 |
> |
break; |
146 |
> |
case 'u': |
147 |
> |
if (!strcmp(argv[0], "usemtl")) { /* material */ |
148 |
> |
if (argc < 2) |
149 |
> |
break; /* not fatal */ |
150 |
> |
tmpid.number = 0; |
151 |
> |
tmpid.name = argv[1]; |
152 |
> |
findid(&qual[Q_MTL], &tmpid, 1); |
153 |
> |
} else if (!strcmp(argv[0], "usemap")) {/* map */ |
154 |
> |
if (argc < 2 || !strcmp(argv[1], "off")) |
155 |
> |
break; /* not fatal */ |
156 |
> |
tmpid.number = 0; |
157 |
> |
tmpid.name = argv[1]; |
158 |
> |
findid(&qual[Q_MAP], &tmpid, 1); |
159 |
|
} |
160 |
< |
convert(argv[i], fp); |
161 |
< |
fclose(fp); |
160 |
> |
break; |
161 |
> |
case 'o': /* object name */ |
162 |
> |
if (argv[0][1] || argc < 2) |
163 |
> |
break; |
164 |
> |
tmpid.number = 0; |
165 |
> |
tmpid.name = argv[1]; |
166 |
> |
findid(&qual[Q_OBJ], &tmpid, 1); |
167 |
> |
break; |
168 |
> |
case 'g': /* group name(s) */ |
169 |
> |
if (argv[0][1]) |
170 |
> |
break; |
171 |
> |
tmpid.number = 0; |
172 |
> |
for (i = 1; i < argc; i++) { |
173 |
> |
tmpid.name = argv[i]; |
174 |
> |
findid(&qual[Q_GRP], &tmpid, 1); |
175 |
> |
} |
176 |
> |
break; |
177 |
|
} |
93 |
– |
exit(0); |
178 |
|
} |
179 |
|
|
180 |
|
|
181 |
< |
convert(fname, fp) /* convert a T-mesh */ |
98 |
< |
char *fname; |
181 |
> |
convert(fp) /* convert a T-mesh */ |
182 |
|
FILE *fp; |
183 |
|
{ |
184 |
|
char *argv[MAXARG]; |
185 |
|
int argc; |
186 |
|
int nstats, nunknown; |
187 |
|
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; |
188 |
|
|
189 |
< |
printf("\n# Wavefront file read from: %s\n", fname); |
189 |
> |
nstats = nunknown = 0; |
190 |
|
/* scan until EOF */ |
191 |
< |
while (argc = getstmt(argv, fp)) { |
191 |
> |
while ( (argc = getstmt(argv, fp)) ) { |
192 |
|
switch (argv[0][0]) { |
193 |
|
case 'v': /* vertex */ |
194 |
|
switch (argv[0][1]) { |
195 |
|
case '\0': /* point */ |
196 |
|
if (badarg(argc-1,argv+1,"fff")) |
197 |
< |
syntax(fname, lineno, "Bad vertex"); |
197 |
> |
syntax("Bad vertex"); |
198 |
|
newv(atof(argv[1]), atof(argv[2]), |
199 |
|
atof(argv[3])); |
200 |
|
break; |
202 |
|
if (argv[0][2]) |
203 |
|
goto unknown; |
204 |
|
if (badarg(argc-1,argv+1,"fff")) |
205 |
< |
syntax(fname, lineno, "Bad normal"); |
205 |
> |
syntax("Bad normal"); |
206 |
|
if (!newvn(atof(argv[1]), atof(argv[2]), |
207 |
|
atof(argv[3]))) |
208 |
< |
syntax(fname, lineno, "Zero normal"); |
208 |
> |
syntax("Zero normal"); |
209 |
|
break; |
210 |
< |
case 't': /* texture */ |
210 |
> |
case 't': /* texture map */ |
211 |
|
if (argv[0][2]) |
212 |
|
goto unknown; |
213 |
|
if (badarg(argc-1,argv+1,"ff")) |
221 |
|
case 'f': /* face */ |
222 |
|
if (argv[0][1]) |
223 |
|
goto unknown; |
224 |
+ |
faceno++; |
225 |
|
switch (argc-1) { |
226 |
|
case 0: case 1: case 2: |
227 |
< |
syntax(fname, lineno, "Too few vertices"); |
227 |
> |
syntax("Too few vertices"); |
228 |
|
break; |
229 |
|
case 3: |
230 |
|
if (!puttri(argv[1], argv[2], argv[3])) |
231 |
< |
syntax(fname, lineno, "Bad triangle"); |
231 |
> |
syntax("Bad triangle"); |
232 |
|
break; |
156 |
– |
case 4: |
157 |
– |
if (!putquad(argv[1], argv[2], |
158 |
– |
argv[3], argv[4])) |
159 |
– |
syntax(fname, lineno, "Bad quad"); |
160 |
– |
break; |
233 |
|
default: |
234 |
|
if (!putface(argc-1, argv+1)) |
235 |
< |
syntax(fname, lineno, "Bad face"); |
235 |
> |
syntax("Bad face"); |
236 |
|
break; |
237 |
|
} |
238 |
|
break; |
245 |
|
if (argc < 2) |
246 |
|
break; /* not fatal */ |
247 |
|
if (!strcmp(argv[1], "off")) |
248 |
< |
picfile[0] = '\0'; |
248 |
> |
mapname[0] = '\0'; |
249 |
|
else |
250 |
< |
strcpy(picfile, argv[1]); |
250 |
> |
sprintf(mapname, "%s.pic", argv[1]); |
251 |
|
} else |
252 |
|
goto unknown; |
253 |
|
break; |
261 |
|
case 'g': /* group name(s) */ |
262 |
|
if (argv[0][1]) |
263 |
|
goto unknown; |
192 |
– |
if (argc < 2) |
193 |
– |
break; /* not fatal */ |
194 |
– |
objname[0] = '\0'; |
264 |
|
for (i = 1; i < argc; i++) |
265 |
< |
if (objname[0]) |
266 |
< |
sprintf(objname+strlen(objname), |
198 |
< |
".%s", argv[i]); |
199 |
< |
else |
200 |
< |
strcpy(objname, argv[i]); |
265 |
> |
strcpy(group[i-1], argv[i]); |
266 |
> |
group[i-1][0] = '\0'; |
267 |
|
break; |
268 |
|
case '#': /* comment */ |
269 |
+ |
printargs(argc, argv, stdout); |
270 |
|
break; |
271 |
|
default:; /* something we don't deal with */ |
272 |
|
unknown: |
275 |
|
} |
276 |
|
nstats++; |
277 |
|
} |
278 |
< |
printf("\n# Done processing file: %s\n", fname); |
278 |
> |
printf("\n# Done processing file: %s\n", inpfile); |
279 |
|
printf("# %d lines, %d statements, %d unrecognized\n", |
280 |
|
lineno, nstats, nunknown); |
281 |
|
} |
313 |
|
|
314 |
|
return(i); |
315 |
|
} |
249 |
– |
|
316 |
|
|
317 |
+ |
|
318 |
+ |
char * |
319 |
+ |
getmtl() /* figure material for this face */ |
320 |
+ |
{ |
321 |
+ |
register RULEHD *rp = ourmapping; |
322 |
+ |
|
323 |
+ |
if (rp == NULL) { /* no rule set */ |
324 |
+ |
if (matname[0]) |
325 |
+ |
return(matname); |
326 |
+ |
if (group[0][0]) |
327 |
+ |
return(group[0]); |
328 |
+ |
return(defmat); |
329 |
+ |
} |
330 |
+ |
/* check for match */ |
331 |
+ |
do { |
332 |
+ |
if (matchrule(rp)) { |
333 |
+ |
if (!strcmp(rp->mnam, VOIDID)) |
334 |
+ |
return(NULL); /* match is null */ |
335 |
+ |
return(rp->mnam); |
336 |
+ |
} |
337 |
+ |
rp = rp->next; |
338 |
+ |
} while (rp != NULL); |
339 |
+ |
/* no match found */ |
340 |
+ |
return(NULL); |
341 |
+ |
} |
342 |
+ |
|
343 |
+ |
|
344 |
+ |
char * |
345 |
+ |
getonm() /* invent a good name for object */ |
346 |
+ |
{ |
347 |
+ |
static char name[64]; |
348 |
+ |
register char *cp1, *cp2; |
349 |
+ |
register int i; |
350 |
+ |
/* check for preset */ |
351 |
+ |
if (objname[0]) |
352 |
+ |
return(objname); |
353 |
+ |
if (!group[0][0]) |
354 |
+ |
return(defobj); |
355 |
+ |
cp1 = name; /* else make name out of groups */ |
356 |
+ |
for (i = 0; group[i][0]; i++) { |
357 |
+ |
cp2 = group[i]; |
358 |
+ |
if (cp1 > name) |
359 |
+ |
*cp1++ = '.'; |
360 |
+ |
while ( (*cp1 = *cp2++) ) |
361 |
+ |
if (++cp1 >= name+sizeof(name)-2) { |
362 |
+ |
*cp1 = '\0'; |
363 |
+ |
return(name); |
364 |
+ |
} |
365 |
+ |
} |
366 |
+ |
return(name); |
367 |
+ |
} |
368 |
+ |
|
369 |
+ |
|
370 |
+ |
matchrule(rp) /* check for a match on this rule */ |
371 |
+ |
register RULEHD *rp; |
372 |
+ |
{ |
373 |
+ |
ID tmpid; |
374 |
+ |
int gotmatch; |
375 |
+ |
register int i; |
376 |
+ |
|
377 |
+ |
if (rp->qflg & FL(Q_MTL)) { |
378 |
+ |
if (!matname[0]) |
379 |
+ |
return(0); |
380 |
+ |
tmpid.number = 0; |
381 |
+ |
tmpid.name = matname; |
382 |
+ |
if (!matchid(&tmpid, &idm(rp)[Q_MTL])) |
383 |
+ |
return(0); |
384 |
+ |
} |
385 |
+ |
if (rp->qflg & FL(Q_MAP)) { |
386 |
+ |
if (!mapname[0]) |
387 |
+ |
return(0); |
388 |
+ |
tmpid.number = 0; |
389 |
+ |
tmpid.name = mapname; |
390 |
+ |
if (!matchid(&tmpid, &idm(rp)[Q_MAP])) |
391 |
+ |
return(0); |
392 |
+ |
} |
393 |
+ |
if (rp->qflg & FL(Q_GRP)) { |
394 |
+ |
tmpid.number = 0; |
395 |
+ |
gotmatch = 0; |
396 |
+ |
for (i = 0; group[i][0]; i++) { |
397 |
+ |
tmpid.name = group[i]; |
398 |
+ |
gotmatch |= matchid(&tmpid, &idm(rp)[Q_GRP]); |
399 |
+ |
} |
400 |
+ |
if (!gotmatch) |
401 |
+ |
return(0); |
402 |
+ |
} |
403 |
+ |
if (rp->qflg & FL(Q_OBJ)) { |
404 |
+ |
if (!objname[0]) |
405 |
+ |
return(0); |
406 |
+ |
tmpid.number = 0; |
407 |
+ |
tmpid.name = objname; |
408 |
+ |
if (!matchid(&tmpid, &idm(rp)[Q_OBJ])) |
409 |
+ |
return(0); |
410 |
+ |
} |
411 |
+ |
if (rp->qflg & FL(Q_FAC)) { |
412 |
+ |
tmpid.name = NULL; |
413 |
+ |
tmpid.number = faceno; |
414 |
+ |
if (!matchid(&tmpid, &idm(rp)[Q_FAC])) |
415 |
+ |
return(0); |
416 |
+ |
} |
417 |
+ |
return(1); |
418 |
+ |
} |
419 |
+ |
|
420 |
+ |
|
421 |
|
cvtndx(vi, vs) /* convert vertex string to index */ |
422 |
|
register VNDX vi; |
423 |
|
register char *vs; |
428 |
|
if (vi[0]-- > nvs) |
429 |
|
return(0); |
430 |
|
} else if (vi[0] < 0) { |
431 |
< |
vi[0] = nvs + vi[0]; |
431 |
> |
vi[0] += nvs; |
432 |
|
if (vi[0] < 0) |
433 |
|
return(0); |
434 |
|
} else |
435 |
|
return(0); |
436 |
< |
/* get texture */ |
436 |
> |
/* get map */ |
437 |
|
while (*vs) |
438 |
|
if (*vs++ == '/') |
439 |
|
break; |
442 |
|
if (vi[1]-- > nvts) |
443 |
|
return(0); |
444 |
|
} else if (vi[1] < 0) { |
445 |
< |
vi[1] = nvts + vi[1]; |
445 |
> |
vi[1] += nvts; |
446 |
|
if (vi[1] < 0) |
447 |
|
return(0); |
448 |
|
} else |
456 |
|
if (vi[2]-- > nvns) |
457 |
|
return(0); |
458 |
|
} else if (vi[2] < 0) { |
459 |
< |
vi[2] = nvns + vi[2]; |
459 |
> |
vi[2] += nvns; |
460 |
|
if (vi[2] < 0) |
461 |
|
return(0); |
462 |
|
} else |
465 |
|
} |
466 |
|
|
467 |
|
|
468 |
< |
putface(ac, av) /* put out an N-sided polygon */ |
468 |
> |
nonplanar(ac, av) /* are vertices non-planar? */ |
469 |
|
register int ac; |
470 |
|
register char **av; |
471 |
|
{ |
472 |
|
VNDX vi; |
473 |
+ |
RREAL *p0, *p1; |
474 |
+ |
FVECT v1, v2, nsum, newn; |
475 |
+ |
double d; |
476 |
+ |
register int i; |
477 |
|
|
478 |
< |
printf("\n%s polygon %s.%d\n", matname, objname, ++nfaces); |
478 |
> |
if (!cvtndx(vi, av[0])) |
479 |
> |
return(0); |
480 |
> |
if (!flatten && vi[2] >= 0) |
481 |
> |
return(1); /* has interpolated normals */ |
482 |
> |
if (ac < 4) |
483 |
> |
return(0); /* it's a triangle! */ |
484 |
> |
/* set up */ |
485 |
> |
p0 = vlist[vi[0]]; |
486 |
> |
if (!cvtndx(vi, av[1])) |
487 |
> |
return(0); /* error gets caught later */ |
488 |
> |
nsum[0] = nsum[1] = nsum[2] = 0.; |
489 |
> |
p1 = vlist[vi[0]]; |
490 |
> |
fvsum(v2, p1, p0, -1.0); |
491 |
> |
for (i = 2; i < ac; i++) { |
492 |
> |
VCOPY(v1, v2); |
493 |
> |
if (!cvtndx(vi, av[i])) |
494 |
> |
return(0); |
495 |
> |
p1 = vlist[vi[0]]; |
496 |
> |
fvsum(v2, p1, p0, -1.0); |
497 |
> |
fcross(newn, v1, v2); |
498 |
> |
if (normalize(newn) == 0.0) { |
499 |
> |
if (i < 3) |
500 |
> |
return(1); /* can't deal with this */ |
501 |
> |
fvsum(nsum, nsum, nsum, 1./(i-2)); |
502 |
> |
continue; |
503 |
> |
} |
504 |
> |
d = fdot(newn,nsum); |
505 |
> |
if (d >= 0) { |
506 |
> |
if (d < (1.0-FTINY)*(i-2)) |
507 |
> |
return(1); |
508 |
> |
fvsum(nsum, nsum, newn, 1.0); |
509 |
> |
} else { |
510 |
> |
if (d > -(1.0-FTINY)*(i-2)) |
511 |
> |
return(1); |
512 |
> |
fvsum(nsum, nsum, newn, -1.0); |
513 |
> |
} |
514 |
> |
} |
515 |
> |
return(0); |
516 |
> |
} |
517 |
> |
|
518 |
> |
|
519 |
> |
putface(ac, av) /* put out an N-sided polygon */ |
520 |
> |
int ac; |
521 |
> |
register char **av; |
522 |
> |
{ |
523 |
> |
VNDX vi; |
524 |
> |
char *cp; |
525 |
> |
register int i; |
526 |
> |
|
527 |
> |
if (nonplanar(ac, av)) { /* break into triangles */ |
528 |
> |
while (ac > 2) { |
529 |
> |
if (!puttri(av[0], av[1], av[2])) |
530 |
> |
return(0); |
531 |
> |
ac--; /* remove vertex & rotate */ |
532 |
> |
cp = av[0]; |
533 |
> |
for (i = 0; i < ac-1; i++) |
534 |
> |
av[i] = av[i+2]; |
535 |
> |
av[i] = cp; |
536 |
> |
} |
537 |
> |
return(1); |
538 |
> |
} |
539 |
> |
if ((cp = getmtl()) == NULL) |
540 |
> |
return(-1); |
541 |
> |
printf("\n%s polygon %s.%d\n", cp, getonm(), faceno); |
542 |
|
printf("0\n0\n%d\n", 3*ac); |
543 |
< |
while (ac--) { |
544 |
< |
if (!cvtndx(vi, *av++)) |
543 |
> |
for (i = 0; i < ac; i++) { |
544 |
> |
if (!cvtndx(vi, av[i])) |
545 |
|
return(0); |
546 |
|
pvect(vlist[vi[0]]); |
547 |
|
} |
552 |
|
puttri(v1, v2, v3) /* put out a triangle */ |
553 |
|
char *v1, *v2, *v3; |
554 |
|
{ |
555 |
< |
char *mod = matname; |
555 |
> |
char *mod; |
556 |
|
VNDX v1i, v2i, v3i; |
557 |
|
BARYCCM bvecs; |
558 |
+ |
RREAL bcoor[3][3]; |
559 |
|
int texOK, patOK; |
560 |
+ |
int flatness; |
561 |
+ |
register int i; |
562 |
|
|
563 |
+ |
if ((mod = getmtl()) == NULL) |
564 |
+ |
return(-1); |
565 |
+ |
|
566 |
|
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
567 |
|
return(0); |
568 |
|
/* compute barycentric coordinates */ |
569 |
< |
texOK = (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); |
570 |
< |
patOK = picfile[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
569 |
> |
if (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0) |
570 |
> |
flatness = flat_tri(vlist[v1i[0]], vlist[v2i[0]], vlist[v3i[0]], |
571 |
> |
vnlist[v1i[2]], vnlist[v2i[2]], vnlist[v3i[2]]); |
572 |
> |
else |
573 |
> |
flatness = ISFLAT; |
574 |
> |
|
575 |
> |
switch (flatness) { |
576 |
> |
case DEGEN: /* zero area */ |
577 |
> |
return(-1); |
578 |
> |
case RVFLAT: /* reversed normals, but flat */ |
579 |
> |
case ISFLAT: /* smoothing unnecessary */ |
580 |
> |
texOK = 0; |
581 |
> |
break; |
582 |
> |
case RVBENT: /* reversed normals with smoothing */ |
583 |
> |
case ISBENT: /* proper smoothing */ |
584 |
> |
texOK = 1; |
585 |
> |
break; |
586 |
> |
} |
587 |
> |
if (flatten) |
588 |
> |
texOK = 0; |
589 |
> |
#ifdef TEXMAPS |
590 |
> |
patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
591 |
> |
#else |
592 |
> |
patOK = 0; |
593 |
> |
#endif |
594 |
|
if (texOK | patOK) |
595 |
< |
if (comp_baryc(bvecs, vlist[v1i[0]], vlist[v2i[0]], |
595 |
> |
if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]], |
596 |
|
vlist[v3i[0]]) < 0) |
597 |
|
return(-1); |
598 |
|
/* put out texture (if any) */ |
600 |
|
printf("\n%s texfunc %s\n", mod, TEXNAME); |
601 |
|
mod = TEXNAME; |
602 |
|
printf("4 dx dy dz %s\n", TCALNAME); |
603 |
< |
printf("0\n21\n"); |
604 |
< |
put_baryc(bvecs); |
605 |
< |
printf("\t%14.12g %14.12g %14.12g\n", |
606 |
< |
vnlist[v1i[2]][0], vnlist[v2i[2]][0], |
607 |
< |
vnlist[v3i[2]][0]); |
608 |
< |
printf("\t%14.12g %14.12g %14.12g\n", |
609 |
< |
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]); |
603 |
> |
printf("0\n"); |
604 |
> |
for (i = 0; i < 3; i++) { |
605 |
> |
bcoor[i][0] = vnlist[v1i[2]][i]; |
606 |
> |
bcoor[i][1] = vnlist[v2i[2]][i]; |
607 |
> |
bcoor[i][2] = vnlist[v3i[2]][i]; |
608 |
> |
} |
609 |
> |
put_baryc(&bvecs, bcoor, 3); |
610 |
|
} |
611 |
+ |
#ifdef TEXMAPS |
612 |
|
/* put out pattern (if any) */ |
613 |
|
if (patOK) { |
614 |
|
printf("\n%s colorpict %s\n", mod, PATNAME); |
615 |
|
mod = PATNAME; |
616 |
< |
printf("7 noneg noneg noneg %s %s u v\n", picfile, TCALNAME); |
617 |
< |
printf("0\n18\n"); |
618 |
< |
put_baryc(bvecs); |
619 |
< |
printf("\t%f %f %f\n", vtlist[v1i[1]][0], |
620 |
< |
vtlist[v2i[1]][0], vtlist[v3i[1]][0]); |
621 |
< |
printf("\t%f %f %f\n", vtlist[v1i[1]][1], |
622 |
< |
vtlist[v2i[1]][1], vtlist[v3i[1]][1]); |
616 |
> |
printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); |
617 |
> |
printf("0\n"); |
618 |
> |
for (i = 0; i < 2; i++) { |
619 |
> |
bcoor[i][0] = vtlist[v1i[1]][i]; |
620 |
> |
bcoor[i][1] = vtlist[v2i[1]][i]; |
621 |
> |
bcoor[i][2] = vtlist[v3i[1]][i]; |
622 |
> |
} |
623 |
> |
put_baryc(&bvecs, bcoor, 2); |
624 |
|
} |
625 |
< |
/* put out triangle */ |
626 |
< |
printf("\n%s polygon %s.%d\n", mod, objname, ++nfaces); |
625 |
> |
#endif |
626 |
> |
/* put out (reversed) triangle */ |
627 |
> |
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
628 |
|
printf("0\n0\n9\n"); |
629 |
< |
pvect(vlist[v1i[0]]); |
630 |
< |
pvect(vlist[v2i[0]]); |
631 |
< |
pvect(vlist[v3i[0]]); |
632 |
< |
|
633 |
< |
return(1); |
634 |
< |
} |
635 |
< |
|
636 |
< |
|
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; |
629 |
> |
if (flatness == RVFLAT || flatness == RVBENT) { |
630 |
> |
pvect(vlist[v3i[0]]); |
631 |
> |
pvect(vlist[v2i[0]]); |
632 |
> |
pvect(vlist[v1i[0]]); |
633 |
> |
} else { |
634 |
> |
pvect(vlist[v1i[0]]); |
635 |
> |
pvect(vlist[v2i[0]]); |
636 |
> |
pvect(vlist[v3i[0]]); |
637 |
|
} |
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 |
– |
} |
638 |
|
return(1); |
639 |
|
} |
640 |
|
|
641 |
|
|
514 |
– |
int |
515 |
– |
norminterp(resmat, p0i, p1i, p2i, p3i) /* compute normal interpolation */ |
516 |
– |
register FVECT resmat[4]; |
517 |
– |
register VNDX p0i, p1i, p2i, p3i; |
518 |
– |
{ |
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 |
– |
|
642 |
|
freeverts() /* free all vertices */ |
643 |
|
{ |
644 |
|
if (nvs) { |
645 |
< |
free((char *)vlist); |
645 |
> |
free((void *)vlist); |
646 |
|
nvs = 0; |
647 |
|
} |
648 |
|
if (nvts) { |
649 |
< |
free((char *)vtlist); |
649 |
> |
free((void *)vtlist); |
650 |
|
nvts = 0; |
651 |
|
} |
652 |
|
if (nvns) { |
653 |
< |
free((char *)vnlist); |
653 |
> |
free((void *)vnlist); |
654 |
|
nvns = 0; |
655 |
|
} |
656 |
|
} |
664 |
|
if (nvs == 0) |
665 |
|
vlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
666 |
|
else |
667 |
< |
vlist = (FVECT *)realloc((char *)vlist, |
667 |
> |
vlist = (FVECT *)realloc((void *)vlist, |
668 |
|
(nvs+CHUNKSIZ)*sizeof(FVECT)); |
669 |
|
if (vlist == NULL) { |
670 |
|
fprintf(stderr, |
688 |
|
if (nvns == 0) |
689 |
|
vnlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
690 |
|
else |
691 |
< |
vnlist = (FVECT *)realloc((char *)vnlist, |
691 |
> |
vnlist = (FVECT *)realloc((void *)vnlist, |
692 |
|
(nvns+CHUNKSIZ)*sizeof(FVECT)); |
693 |
|
if (vnlist == NULL) { |
694 |
|
fprintf(stderr, |
707 |
|
|
708 |
|
|
709 |
|
int |
710 |
< |
newvt(x, y) /* create a new texture vertex */ |
710 |
> |
newvt(x, y) /* create a new texture map vertex */ |
711 |
|
double x, y; |
712 |
|
{ |
713 |
|
if (!(nvts%CHUNKSIZ)) { /* allocate next block */ |
714 |
|
if (nvts == 0) |
715 |
< |
vtlist = (FLOAT (*)[2])malloc(CHUNKSIZ*2*sizeof(FLOAT)); |
715 |
> |
vtlist = (RREAL (*)[2])malloc(CHUNKSIZ*2*sizeof(RREAL)); |
716 |
|
else |
717 |
< |
vtlist = (FLOAT (*)[2])realloc((char *)vtlist, |
718 |
< |
(nvts+CHUNKSIZ)*2*sizeof(FLOAT)); |
717 |
> |
vtlist = (RREAL (*)[2])realloc((void *)vtlist, |
718 |
> |
(nvts+CHUNKSIZ)*2*sizeof(RREAL)); |
719 |
|
if (vtlist == NULL) { |
720 |
|
fprintf(stderr, |
721 |
|
"Out of memory while allocating texture vertex %d\n", |
723 |
|
exit(1); |
724 |
|
} |
725 |
|
} |
726 |
< |
/* assign new texture vertex */ |
726 |
> |
/* assign new vertex */ |
727 |
|
vtlist[nvts][0] = x; |
728 |
|
vtlist[nvts][1] = y; |
729 |
|
return(++nvts); |
730 |
|
} |
731 |
|
|
732 |
|
|
733 |
< |
syntax(fn, ln, er) /* report syntax error and exit */ |
662 |
< |
char *fn; |
663 |
< |
int ln; |
733 |
> |
syntax(er) /* report syntax error and exit */ |
734 |
|
char *er; |
735 |
|
{ |
736 |
|
fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", |
737 |
< |
fn, ln, er); |
737 |
> |
inpfile, lineno, er); |
738 |
|
exit(1); |
739 |
|
} |