1 |
/* Copyright (c) 1995 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* Convert MGF to Inventor file. |
9 |
* |
10 |
* December 1995 Greg Ward |
11 |
*/ |
12 |
|
13 |
#include <stdio.h> |
14 |
|
15 |
#include <math.h> |
16 |
|
17 |
#include <ctype.h> |
18 |
|
19 |
#include "parser.h" |
20 |
|
21 |
#define O_INV1 1 /* Inventor 1.0 output */ |
22 |
#define O_INV2 2 /* Inventor 2.0 output */ |
23 |
#define O_VRML 3 /* VRML output */ |
24 |
|
25 |
#define TABSTOP 8 /* assumed number of characters per tab */ |
26 |
#define SHIFTW 2 /* nesting shift width */ |
27 |
#define MAXIND 15 /* maximum indent level */ |
28 |
|
29 |
char tabs[MAXIND*SHIFTW+1]; /* current tab-in string */ |
30 |
|
31 |
int outtype = O_INV2; /* output format */ |
32 |
|
33 |
extern int i_comment(), i_object(), i_xf(), |
34 |
i_cyl(), i_face(), i_sph(); |
35 |
|
36 |
extern char *to_id(); |
37 |
|
38 |
|
39 |
main(argc, argv) |
40 |
int argc; |
41 |
char *argv[]; |
42 |
{ |
43 |
int i; |
44 |
/* initialize dispatch table */ |
45 |
mg_ehand[MG_E_COMMENT] = i_comment; /* we pass comments */ |
46 |
mg_ehand[MG_E_COLOR] = c_hcolor; /* they get color */ |
47 |
mg_ehand[MG_E_CMIX] = c_hcolor; /* they mix colors */ |
48 |
mg_ehand[MG_E_CSPEC] = c_hcolor; /* they get spectra */ |
49 |
mg_ehand[MG_E_CXY] = c_hcolor; /* they get chromaticities */ |
50 |
mg_ehand[MG_E_CCT] = c_hcolor; /* they get color temp's */ |
51 |
mg_ehand[MG_E_CYL] = i_cyl; /* we do cylinders */ |
52 |
mg_ehand[MG_E_ED] = c_hmaterial; /* they get emission */ |
53 |
mg_ehand[MG_E_FACE] = i_face; /* we do faces */ |
54 |
mg_ehand[MG_E_MATERIAL] = c_hmaterial; /* they get materials */ |
55 |
mg_ehand[MG_E_NORMAL] = c_hvertex; /* they get normals */ |
56 |
mg_ehand[MG_E_OBJECT] = i_object; /* we track object names */ |
57 |
mg_ehand[MG_E_POINT] = c_hvertex; /* they get points */ |
58 |
mg_ehand[MG_E_RD] = c_hmaterial; /* they get diffuse refl. */ |
59 |
mg_ehand[MG_E_RS] = c_hmaterial; /* they get specular refl. */ |
60 |
mg_ehand[MG_E_SIDES] = c_hmaterial; /* they get # sides */ |
61 |
mg_ehand[MG_E_SPH] = i_sph; /* we do spheres */ |
62 |
mg_ehand[MG_E_TD] = c_hmaterial; /* they get diffuse trans. */ |
63 |
mg_ehand[MG_E_TS] = c_hmaterial; /* they get specular trans. */ |
64 |
mg_ehand[MG_E_VERTEX] = c_hvertex; /* they get vertices */ |
65 |
mg_ehand[MG_E_XF] = i_xf; /* we track transforms */ |
66 |
mg_init(); /* initialize the parser */ |
67 |
/* get options and print format line */ |
68 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
69 |
if (!strcmp(argv[i], "-vrml")) |
70 |
outtype = O_VRML; |
71 |
else if (!strcmp(argv[i], "-1")) |
72 |
outtype = O_INV1; |
73 |
else if (!strcmp(argv[i], "-2")) |
74 |
outtype = O_INV2; |
75 |
else |
76 |
goto userr; |
77 |
switch (outtype) { |
78 |
case O_INV1: |
79 |
printf("#Inventor V1.0 ascii\n"); |
80 |
break; |
81 |
case O_INV2: |
82 |
printf("#Inventor V2.0 ascii\n"); |
83 |
break; |
84 |
case O_VRML: |
85 |
printf("#VRML 1.0 ascii\n"); |
86 |
break; |
87 |
} |
88 |
printf("## Translated from MGF Version %d.%d\n", MG_VMAJOR, MG_VMINOR); |
89 |
printf("Separator {\n"); /* begin root node */ |
90 |
/* general properties */ |
91 |
printf("MaterialBinding { value OVERALL }\n"); |
92 |
printf("NormalBinding { value PER_VERTEX_INDEXED }\n"); |
93 |
if (outtype != O_INV1) { |
94 |
printf("ShapeHints {\n"); |
95 |
printf("\tvertexOrdering CLOCKWISE\n"); |
96 |
printf("\tfaceType UNKNOWN_FACE_TYPE\n"); |
97 |
printf("}\n"); |
98 |
} |
99 |
if (i == argc) { /* load standard input */ |
100 |
if (mg_load(NULL) != MG_OK) |
101 |
exit(1); |
102 |
if (mg_nunknown) |
103 |
printf("## %s: %u unknown entities\n", |
104 |
argv[0], mg_nunknown); |
105 |
} |
106 |
/* load MGF files */ |
107 |
for ( ; i < argc; i++) { |
108 |
printf("## %s %s ##############################\n", |
109 |
argv[0], argv[i]); |
110 |
mg_nunknown = 0; |
111 |
if (mg_load(argv[i]) != MG_OK) |
112 |
exit(1); |
113 |
if (mg_nunknown) |
114 |
printf("## %s %s: %u unknown entities\n", |
115 |
argv[0], argv[i], mg_nunknown); |
116 |
} |
117 |
printf("}\n"); /* close root node */ |
118 |
exit(0); |
119 |
userr: |
120 |
fprintf(stderr, "%s: [-1|-2|-vrml] [file] ..\n", argv[0]); |
121 |
exit(1); |
122 |
} |
123 |
|
124 |
|
125 |
indent(deeper) /* indent in or out */ |
126 |
int deeper; |
127 |
{ |
128 |
static int level; /* current nesting level */ |
129 |
register int i; |
130 |
register char *cp; |
131 |
|
132 |
if (deeper) level++; /* in or out? */ |
133 |
else if (level > 0) level--; |
134 |
/* compute actual shift */ |
135 |
if ((i = level) > MAXIND) i = MAXIND; |
136 |
cp = tabs; |
137 |
for (i *= SHIFTW; i >= TABSTOP; i -= TABSTOP) |
138 |
*cp++ = '\t'; |
139 |
while (i--) |
140 |
*cp++ = ' '; |
141 |
*cp = '\0'; |
142 |
} |
143 |
|
144 |
|
145 |
int |
146 |
i_comment(ac, av) /* transfer comment as is */ |
147 |
int ac; |
148 |
char **av; |
149 |
{ |
150 |
fputs(tabs, stdout); |
151 |
putchar('#'); /* Inventor comment character */ |
152 |
while (--ac > 0) { |
153 |
putchar(' '); |
154 |
fputs(*++av, stdout); |
155 |
} |
156 |
putchar('\n'); |
157 |
return(MG_OK); |
158 |
} |
159 |
|
160 |
|
161 |
int |
162 |
i_object(ac, av) /* group object name */ |
163 |
int ac; |
164 |
char **av; |
165 |
{ |
166 |
static int objnest; |
167 |
|
168 |
if (ac == 2) { /* start group */ |
169 |
printf("%sDEF %s Group {\n", tabs, to_id(av[1])); |
170 |
indent(1); |
171 |
objnest++; |
172 |
return(MG_OK); |
173 |
} |
174 |
if (ac == 1) { /* end group */ |
175 |
if (--objnest < 0) |
176 |
return(MG_ECNTXT); |
177 |
indent(0); |
178 |
fputs(tabs, stdout); |
179 |
fputs("}\n", stdout); |
180 |
return(MG_OK); |
181 |
} |
182 |
return(MG_EARGC); |
183 |
} |
184 |
|
185 |
|
186 |
int |
187 |
i_xf(ac, av) /* transform object(s) */ |
188 |
int ac; |
189 |
char **av; |
190 |
{ |
191 |
static long xfid; |
192 |
register XF_SPEC *spec; |
193 |
|
194 |
if (ac == 1) { /* end of transform */ |
195 |
if ((spec = xf_context) == NULL) |
196 |
return(MG_ECNTXT); |
197 |
indent(0); /* close original segment */ |
198 |
printf("%s}\n", tabs); |
199 |
indent(0); |
200 |
printf("%s}\n", tabs); |
201 |
if (spec->xarr != NULL) { /* check for iteration */ |
202 |
register struct xf_array *ap = spec->xarr; |
203 |
register int n; |
204 |
|
205 |
ap->aarg[ap->ndim-1].i = 1; /* iterate array */ |
206 |
for ( ; ; ) { |
207 |
n = ap->ndim-1; |
208 |
while (ap->aarg[n].i < ap->aarg[n].n) { |
209 |
sprintf(ap->aarg[n].arg, "%d", |
210 |
ap->aarg[n].i); |
211 |
printf("%sSeparator {\n", tabs); |
212 |
indent(1); |
213 |
(void)put_xform(spec); |
214 |
printf("%sUSE _xf%ld\n", tabs, |
215 |
spec->xid); |
216 |
indent(0); |
217 |
printf("%s}\n", tabs); |
218 |
++ap->aarg[n].i; |
219 |
} |
220 |
ap->aarg[n].i = 0; |
221 |
(void)strcpy(ap->aarg[n].arg, "0"); |
222 |
while (n-- && ++ap->aarg[n].i >= ap->aarg[n].n) { |
223 |
ap->aarg[n].i = 0; |
224 |
(void)strcpy(ap->aarg[n].arg, "0"); |
225 |
} |
226 |
if (n < 0) |
227 |
break; |
228 |
sprintf(ap->aarg[n].arg, "%d", ap->aarg[n].i); |
229 |
} |
230 |
} |
231 |
/* pop transform */ |
232 |
xf_context = spec->prev; |
233 |
free_xf(spec); |
234 |
return(MG_OK); |
235 |
} |
236 |
/* else allocate new transform */ |
237 |
if ((spec = new_xf(ac-1, av+1)) == NULL) |
238 |
return(MG_EMEM); |
239 |
spec->xid = ++xfid; /* assign unique ID */ |
240 |
spec->prev = xf_context; /* push onto stack */ |
241 |
xf_context = spec; |
242 |
/* translate xf specification */ |
243 |
printf("%sSeparator {\n", tabs); |
244 |
indent(1); |
245 |
if (put_xform(spec) < 0) |
246 |
return(MG_ETYPE); |
247 |
printf("%sDEF _xf%ld Group {\n", tabs, spec->xid); /* begin */ |
248 |
indent(1); |
249 |
return(MG_OK); |
250 |
} |
251 |
|
252 |
|
253 |
int |
254 |
put_xform(spec) /* translate and print transform */ |
255 |
register XF_SPEC *spec; |
256 |
{ |
257 |
register char **av; |
258 |
register int n; |
259 |
|
260 |
n = xf_ac(spec) - xf_ac(spec->prev); |
261 |
if (xf(&spec->xf, n, av=xf_av(spec)) != n) |
262 |
return(-1); |
263 |
printf("%sMatrixTransform {\n", tabs); |
264 |
indent(1); |
265 |
printf("%s# xf", tabs); /* put out original as comment */ |
266 |
while (n--) { |
267 |
putchar(' '); |
268 |
fputs(*av++, stdout); |
269 |
} |
270 |
putchar('\n'); /* put out computed matrix */ |
271 |
printf("%smatrix %13.9g %13.9g %13.9g %13.9g\n", tabs, |
272 |
spec->xf.xfm[0][0], spec->xf.xfm[0][1], |
273 |
spec->xf.xfm[0][2], spec->xf.xfm[0][3]); |
274 |
for (n = 1; n < 4; n++) |
275 |
printf("%s %13.9g %13.9g %13.9g %13.9g\n", tabs, |
276 |
spec->xf.xfm[n][0], spec->xf.xfm[n][1], |
277 |
spec->xf.xfm[n][2], spec->xf.xfm[n][3]); |
278 |
indent(0); |
279 |
printf("%s}\n", tabs); |
280 |
return(0); |
281 |
} |
282 |
|
283 |
|
284 |
int |
285 |
put_material() /* put out current material */ |
286 |
{ |
287 |
char *mname = "mat"; |
288 |
float rgbval[3]; |
289 |
|
290 |
if (c_cmname != NULL) |
291 |
mname = c_cmname; |
292 |
if (!c_cmaterial->clock) { /* current, just use it */ |
293 |
printf("%sUSE %s\n", tabs, to_id(mname)); |
294 |
return(0); |
295 |
} |
296 |
/* else update definition */ |
297 |
printf("%sDEF %s Group {\n", tabs, to_id(mname)); |
298 |
indent(1); |
299 |
printf("%sMaterial {\n", tabs); |
300 |
indent(1); |
301 |
mgf2rgb(&c_cmaterial->rd_c, c_cmaterial->rd, rgbval); |
302 |
printf("%sambientColor %.4f %.4f %.4f\n", tabs, |
303 |
rgbval[0], rgbval[1], rgbval[2]); |
304 |
printf("%sdiffuseColor %.4f %.4f %.4f\n", tabs, |
305 |
rgbval[0], rgbval[1], rgbval[2]); |
306 |
if (c_cmaterial->rs > FTINY) { |
307 |
mgf2rgb(&c_cmaterial->rs_c, c_cmaterial->rs, rgbval); |
308 |
printf("%sspecularColor %.4f %.4f %.4f\n", tabs, |
309 |
rgbval[0], rgbval[1], rgbval[2]); |
310 |
printf("%sshininess %.3f\n", tabs, 1.-c_cmaterial->rs_a); |
311 |
} |
312 |
if (c_cmaterial->ed > FTINY) { |
313 |
mgf2rgb(&c_cmaterial->ed_c, 1.0, rgbval); |
314 |
printf("%semissiveColor %.4f %.4f %.4f\n", tabs, |
315 |
rgbval[0], rgbval[1], rgbval[2]); |
316 |
} |
317 |
if (c_cmaterial->ts > FTINY) |
318 |
printf("%stransparency %.4f\n", tabs, |
319 |
c_cmaterial->ts + c_cmaterial->td); |
320 |
indent(0); |
321 |
printf("%s}\n", tabs); |
322 |
if (outtype != O_INV1) |
323 |
printf("%sShapeHints { shapeType %s }\n", tabs, |
324 |
c_cmaterial->sided ? "SOLID" : "UNKNOWN_SHAPE_TYPE"); |
325 |
indent(0); |
326 |
printf("%s}\n", tabs); |
327 |
c_cmaterial->clock = 0; |
328 |
return(0); |
329 |
} |
330 |
|
331 |
|
332 |
int |
333 |
i_face(ac, av) /* translate an N-sided face */ |
334 |
int ac; |
335 |
char **av; |
336 |
{ |
337 |
C_VERTEX *vl[MG_MAXARGC-1]; |
338 |
int donorms = 1; |
339 |
register int i; |
340 |
|
341 |
if (ac < 4) |
342 |
return(MG_EARGC); |
343 |
printf("%sSeparator {\n", tabs); |
344 |
indent(1); |
345 |
/* put out current material */ |
346 |
if (put_material() < 0) |
347 |
return(MG_EBADMAT); |
348 |
/* get vertex references */ |
349 |
for (i = 0; i < ac-1; i++) { |
350 |
if ((vl[i] = c_getvert(av[i+1])) == NULL) |
351 |
return(MG_EUNDEF); |
352 |
if (is0vect(vl[i]->n)) |
353 |
donorms = 0; |
354 |
} |
355 |
/* put out normal coordinates */ |
356 |
if (donorms) { |
357 |
printf("%sNormal {\n", tabs); |
358 |
indent(1); |
359 |
printf("%svector [ %5.3g %5.3g %5.3g", tabs, |
360 |
vl[0]->n[0], vl[0]->n[1], vl[0]->n[2]); |
361 |
for (i = 1; i < ac-1; i++) |
362 |
printf(",\n%s %5.3g %5.3g %5.3g", tabs, |
363 |
vl[i]->n[0], vl[i]->n[1], vl[i]->n[2]); |
364 |
indent(0); |
365 |
printf(" ]\n%s}\n", tabs); |
366 |
} else |
367 |
printf("%sNormal { }\n", tabs); |
368 |
/* put out vertex coordinates */ |
369 |
printf("%sCoordinate3 {\n", tabs); |
370 |
indent(1); |
371 |
printf("%spoint [ %13.9g %13.9g %13.9g", tabs, |
372 |
vl[0]->p[0], vl[0]->p[1], vl[0]->p[2]); |
373 |
for (i = 1; i < ac-1; i++) |
374 |
printf(",\n%s %13.9g %13.9g %13.9g", tabs, |
375 |
vl[i]->p[0], vl[i]->p[1], vl[i]->p[2]); |
376 |
indent(0); |
377 |
printf(" ]\n%s}\n", tabs); |
378 |
/* put out actual face */ |
379 |
printf("%sIndexedFaceSet {\n", tabs); |
380 |
indent(1); |
381 |
if (donorms) { |
382 |
printf("%snormalIndex [ 0", tabs); |
383 |
for (i = 1; i < ac-1; i++) |
384 |
printf(", %d", i); |
385 |
printf(" ]\n"); |
386 |
} |
387 |
printf("%scoordIndex [ 0", tabs); |
388 |
for (i = 1; i < ac-1; i++) |
389 |
printf(", %d", i); |
390 |
printf(" ]\n"); |
391 |
indent(0); |
392 |
printf("%s}\n", tabs); |
393 |
indent(0); |
394 |
printf("%s}\n", tabs); |
395 |
return(MG_OK); |
396 |
} |
397 |
|
398 |
|
399 |
int |
400 |
i_sph(ac, av) /* translate sphere description */ |
401 |
int ac; |
402 |
char **av; |
403 |
{ |
404 |
register C_VERTEX *cent; |
405 |
|
406 |
if (ac != 3) |
407 |
return(MG_EARGC); |
408 |
printf("%sSeparator {\n", tabs); |
409 |
indent(1); |
410 |
/* put out current material */ |
411 |
if (put_material() < 0) |
412 |
return(MG_EBADMAT); |
413 |
/* get center */ |
414 |
if ((cent = c_getvert(av[1])) == NULL) |
415 |
return(MG_EUNDEF); |
416 |
/* get radius */ |
417 |
if (!isflt(av[2])) |
418 |
return(MG_ETYPE); |
419 |
printf("%sTranslation { translation %13.9g %13.9g %13.9g }\n", tabs, |
420 |
cent->p[0], cent->p[1], cent->p[2]); |
421 |
printf("%sSphere { radius %s }\n", tabs, av[2]); |
422 |
indent(0); |
423 |
printf("%s}\n", tabs); |
424 |
return(MG_OK); |
425 |
} |
426 |
|
427 |
|
428 |
int |
429 |
i_cyl(ac, av) /* translate a cylinder description */ |
430 |
int ac; |
431 |
char **av; |
432 |
{ |
433 |
register C_VERTEX *v1, *v2; |
434 |
FVECT va; |
435 |
double length, angle; |
436 |
|
437 |
if (ac != 4) |
438 |
return(MG_EARGC); |
439 |
printf("%sSeparator {\n", tabs); |
440 |
indent(1); |
441 |
/* put out current material */ |
442 |
if (put_material() < 0) |
443 |
return(MG_EBADMAT); |
444 |
/* get endpoints */ |
445 |
if ((v1 = c_getvert(av[1])) == NULL | (v2 = c_getvert(av[3])) == NULL) |
446 |
return(MG_EUNDEF); |
447 |
/* get radius */ |
448 |
if (!isflt(av[2])) |
449 |
return(MG_ETYPE); |
450 |
/* compute transform */ |
451 |
va[0] = v2->p[0] - v1->p[0]; |
452 |
va[1] = v2->p[1] - v1->p[1]; |
453 |
va[2] = v2->p[2] - v1->p[2]; |
454 |
length = sqrt(DOT(va,va)); |
455 |
angle = acos(va[1]/length); |
456 |
printf("%sTranslation { translation %13.9g %13.9g %13.9g }\n", tabs, |
457 |
.5*(v1->p[0]+v2->p[0]), .5*(v1->p[1]+v2->p[1]), |
458 |
.5*(v1->p[2]+v2->p[2])); |
459 |
printf("%sRotation { rotation %.9g %.9g %.9g %.9g }\n", tabs, |
460 |
va[2], 0., -va[0], angle); |
461 |
/* open-ended */ |
462 |
printf("%sCylinder { parts SIDES height %13.9g radius %s }\n", tabs, |
463 |
length, av[2]); |
464 |
indent(0); |
465 |
printf("%s}\n", tabs); |
466 |
return(MG_OK); |
467 |
} |
468 |
|
469 |
|
470 |
char * |
471 |
to_id(name) /* make sure a name is a valid Inventor ID */ |
472 |
register char *name; |
473 |
{ |
474 |
static char id[32]; |
475 |
register char *cp; |
476 |
|
477 |
for (cp = id; cp < id+sizeof(id)-1 && *name; name++) |
478 |
if (isalnum(*name) || *name == '_') |
479 |
*cp++ = *name; |
480 |
else |
481 |
*cp++ = '_'; |
482 |
*cp = '\0'; |
483 |
return(id); |
484 |
} |