| 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 "parser.h" |
| 18 |
|
| 19 |
#include "lookup.h" |
| 20 |
|
| 21 |
#ifndef PI |
| 22 |
#define PI 3.14159265358979323846 |
| 23 |
#endif |
| 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 |
extern int i_comment(), i_object(), i_xf(), i_include(), |
| 30 |
i_cyl(), i_face(), i_sph(); |
| 31 |
|
| 32 |
int vrmlout = 0; /* VRML output desired? */ |
| 33 |
|
| 34 |
int instancing = 0; /* are we in an instance? */ |
| 35 |
|
| 36 |
char tabs[MAXIND*SHIFTW+1]; /* current tab-in string */ |
| 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_ehand[MG_E_INCLUDE] = i_include; /* we include files */ |
| 67 |
mg_init(); /* initialize the parser */ |
| 68 |
i = 1; /* get options and print format line */ |
| 69 |
if (i < argc && !strncmp(argv[i], "-vrml", strlen(argv[i]))) { |
| 70 |
printf("#VRML 1.0 ascii\n"); |
| 71 |
vrmlout++; |
| 72 |
i++; |
| 73 |
} else |
| 74 |
printf("#Inventor V2.0 ascii\n"); |
| 75 |
printf("## Translated from MGF Version %d.%d\n", MG_VMAJOR, MG_VMINOR); |
| 76 |
printf("Separator {\n"); /* begin root node */ |
| 77 |
/* general properties */ |
| 78 |
printf("MaterialBinding { value OVERALL }\n"); |
| 79 |
printf("NormalBinding { value PER_VERTEX }\n"); |
| 80 |
printf("ShapeHints {\n"); |
| 81 |
printf("\tvertexOrdering CLOCKWISE\n"); |
| 82 |
printf("\tfaceType UNKNOWN_FACE_TYPE\n"); |
| 83 |
printf("}\n"); |
| 84 |
if (i == argc) { /* load standard input */ |
| 85 |
if (mg_load(NULL) != MG_OK) |
| 86 |
exit(1); |
| 87 |
if (mg_nunknown) |
| 88 |
printf("## %s: %u unknown entities\n", |
| 89 |
argv[0], mg_nunknown); |
| 90 |
} |
| 91 |
/* load MGF files */ |
| 92 |
for ( ; i < argc; i++) { |
| 93 |
printf("## %s %s ##############################\n", |
| 94 |
argv[0], argv[i]); |
| 95 |
mg_nunknown = 0; |
| 96 |
if (mg_load(argv[i]) != MG_OK) |
| 97 |
exit(1); |
| 98 |
if (mg_nunknown) |
| 99 |
printf("## %s %s: %u unknown entities\n", |
| 100 |
argv[0], argv[i], mg_nunknown); |
| 101 |
} |
| 102 |
printf("}\n"); /* close root node */ |
| 103 |
exit(0); |
| 104 |
} |
| 105 |
|
| 106 |
|
| 107 |
indent(deeper) /* indent in or out */ |
| 108 |
int deeper; |
| 109 |
{ |
| 110 |
static int level; /* current nesting level */ |
| 111 |
register int i; |
| 112 |
register char *cp; |
| 113 |
|
| 114 |
if (deeper) level++; /* in or out? */ |
| 115 |
else if (level > 0) level--; |
| 116 |
/* compute actual shift */ |
| 117 |
if ((i = level) > MAXIND) i = MAXIND; |
| 118 |
cp = tabs; |
| 119 |
for (i *= SHIFTW; i >= TABSTOP; i -= TABSTOP) |
| 120 |
*cp++ = '\t'; |
| 121 |
while (i--) |
| 122 |
*cp++ = ' '; |
| 123 |
*cp = '\0'; |
| 124 |
} |
| 125 |
|
| 126 |
|
| 127 |
int |
| 128 |
i_comment(ac, av) /* transfer comment as is */ |
| 129 |
int ac; |
| 130 |
char **av; |
| 131 |
{ |
| 132 |
if (instancing) |
| 133 |
return(MG_OK); |
| 134 |
fputs(tabs, stdout); |
| 135 |
putchar('#'); /* Inventor comment character */ |
| 136 |
while (--ac > 0) { |
| 137 |
putchar(' '); |
| 138 |
fputs(*++av, stdout); |
| 139 |
} |
| 140 |
putchar('\n'); |
| 141 |
return(MG_OK); |
| 142 |
} |
| 143 |
|
| 144 |
|
| 145 |
int |
| 146 |
i_object(ac, av) /* group object name */ |
| 147 |
int ac; |
| 148 |
char **av; |
| 149 |
{ |
| 150 |
static int objnest; |
| 151 |
|
| 152 |
if (instancing) |
| 153 |
return(MG_OK); |
| 154 |
if (ac == 2) { /* start group */ |
| 155 |
printf("%sDEF %s Group {\n", tabs, av[1]); |
| 156 |
indent(1); |
| 157 |
objnest++; |
| 158 |
return(MG_OK); |
| 159 |
} |
| 160 |
if (ac == 1) { /* end group */ |
| 161 |
if (--objnest < 0) |
| 162 |
return(MG_ECNTXT); |
| 163 |
indent(0); |
| 164 |
fputs(tabs, stdout); |
| 165 |
fputs("}\n", stdout); |
| 166 |
return(MG_OK); |
| 167 |
} |
| 168 |
return(MG_EARGC); |
| 169 |
} |
| 170 |
|
| 171 |
|
| 172 |
int |
| 173 |
i_xf(ac, av) /* transform object(s) */ |
| 174 |
int ac; |
| 175 |
char **av; |
| 176 |
{ |
| 177 |
static long xfid; |
| 178 |
register XF_SPEC *spec; |
| 179 |
|
| 180 |
if (instancing) |
| 181 |
return(MG_OK); |
| 182 |
if (ac == 1) { /* end of transform */ |
| 183 |
if ((spec = xf_context) == NULL) |
| 184 |
return(MG_ECNTXT); |
| 185 |
indent(0); /* close original segment */ |
| 186 |
printf("%s}\n", tabs); |
| 187 |
indent(0); |
| 188 |
printf("%s}\n", tabs); |
| 189 |
if (spec->xarr != NULL) { /* check for iteration */ |
| 190 |
register struct xf_array *ap = spec->xarr; |
| 191 |
register int n; |
| 192 |
|
| 193 |
ap->aarg[ap->ndim-1].i = 1; /* iterate array */ |
| 194 |
for ( ; ; ) { |
| 195 |
n = ap->ndim-1; |
| 196 |
while (ap->aarg[n].i < ap->aarg[n].n) { |
| 197 |
sprintf(ap->aarg[n].arg, "%d", |
| 198 |
ap->aarg[n].i); |
| 199 |
printf("%sSeparator {\n", tabs); |
| 200 |
indent(1); |
| 201 |
(void)put_xform(spec); |
| 202 |
printf("%sUSE _xf%ld\n", tabs, |
| 203 |
spec->xid); |
| 204 |
indent(0); |
| 205 |
printf("%s}\n", tabs); |
| 206 |
++ap->aarg[n].i; |
| 207 |
} |
| 208 |
ap->aarg[n].i = 0; |
| 209 |
(void)strcpy(ap->aarg[n].arg, "0"); |
| 210 |
while (n-- && ++ap->aarg[n].i >= ap->aarg[n].n) { |
| 211 |
ap->aarg[n].i = 0; |
| 212 |
(void)strcpy(ap->aarg[n].arg, "0"); |
| 213 |
} |
| 214 |
if (n < 0) |
| 215 |
break; |
| 216 |
sprintf(ap->aarg[n].arg, "%d", ap->aarg[n].i); |
| 217 |
} |
| 218 |
} |
| 219 |
/* pop transform */ |
| 220 |
xf_context = spec->prev; |
| 221 |
free_xf(spec); |
| 222 |
return(MG_OK); |
| 223 |
} |
| 224 |
/* else allocate new transform */ |
| 225 |
if ((spec = new_xf(ac-1, av+1)) == NULL) |
| 226 |
return(MG_EMEM); |
| 227 |
spec->xid = ++xfid; /* assign unique ID */ |
| 228 |
spec->prev = xf_context; /* push onto stack */ |
| 229 |
xf_context = spec; |
| 230 |
/* translate xf specification */ |
| 231 |
printf("%sSeparator {\n", tabs); |
| 232 |
indent(1); |
| 233 |
if (put_xform(spec) < 0) |
| 234 |
return(MG_ETYPE); |
| 235 |
printf("%sDEF _xf%ld Group {\n", tabs, spec->xid); /* begin */ |
| 236 |
indent(1); |
| 237 |
return(MG_OK); |
| 238 |
} |
| 239 |
|
| 240 |
|
| 241 |
int |
| 242 |
put_xform(spec) /* translate and print transform */ |
| 243 |
register XF_SPEC *spec; |
| 244 |
{ |
| 245 |
register char **av; |
| 246 |
register int n; |
| 247 |
|
| 248 |
n = xf_ac(spec) - xf_ac(spec->prev); |
| 249 |
if (xf(&spec->xf, n, av=xf_av(spec)) != n) |
| 250 |
return(-1); |
| 251 |
printf("%sMatrixTransform {\n", tabs); |
| 252 |
indent(1); |
| 253 |
printf("%s# xf", tabs); /* put out original as comment */ |
| 254 |
while (n--) { |
| 255 |
putchar(' '); |
| 256 |
fputs(*av++, stdout); |
| 257 |
} |
| 258 |
putchar('\n'); /* put out computed matrix */ |
| 259 |
printf("%smatrix %13.9g %13.9g %13.9g %13.9g\n", tabs, |
| 260 |
spec->xf.xfm[0][0], spec->xf.xfm[0][1], |
| 261 |
spec->xf.xfm[0][2], spec->xf.xfm[0][3]); |
| 262 |
for (n = 1; n < 4; n++) |
| 263 |
printf("%s %13.9g %13.9g %13.9g %13.9g\n", tabs, |
| 264 |
spec->xf.xfm[n][0], spec->xf.xfm[n][1], |
| 265 |
spec->xf.xfm[n][2], spec->xf.xfm[n][3]); |
| 266 |
indent(0); |
| 267 |
printf("%s}\n", tabs); |
| 268 |
return(0); |
| 269 |
} |
| 270 |
|
| 271 |
|
| 272 |
int |
| 273 |
i_include(ac, av) /* include an MGF file */ |
| 274 |
int ac; |
| 275 |
char **av; |
| 276 |
{ |
| 277 |
static LUTAB in_tab = LU_SINIT(free,free); /* instance table */ |
| 278 |
static long nincl; |
| 279 |
LUENT *lp; |
| 280 |
char *xfarg[MG_MAXARGC]; |
| 281 |
MG_FCTXT ictx; |
| 282 |
register int i; |
| 283 |
|
| 284 |
if (ac < 2) |
| 285 |
return(MG_EARGC); |
| 286 |
if (ac > 2) { /* start transform if one */ |
| 287 |
xfarg[0] = mg_ename[MG_E_XF]; |
| 288 |
for (i = 1; i < ac-1; i++) |
| 289 |
xfarg[i] = av[i+1]; |
| 290 |
xfarg[ac-1] = NULL; |
| 291 |
if ((i = mg_handle(MG_E_XF, ac-1, xfarg)) != MG_OK) |
| 292 |
return(i); |
| 293 |
} |
| 294 |
/* open include file */ |
| 295 |
if ((i = mg_open(&ictx, av[1])) != MG_OK) |
| 296 |
return(i); |
| 297 |
/* check for instance */ |
| 298 |
lp = lu_find(&in_tab, ictx.fname); |
| 299 |
if (lp == NULL) goto memerr; |
| 300 |
if (lp->data != NULL) { /* reference original */ |
| 301 |
instancing++; |
| 302 |
printf("%sUSE %s\n", tabs, lp->data); |
| 303 |
lp = NULL; |
| 304 |
} else { /* else new original */ |
| 305 |
lp->key = (char *)malloc(strlen(ictx.fname)+1); |
| 306 |
if (lp->key == NULL) goto memerr; |
| 307 |
(void)strcpy(lp->key, ictx.fname); |
| 308 |
if (ac > 2) { /* use transform group */ |
| 309 |
lp->data = (char *)malloc(16); |
| 310 |
if (lp->data == NULL) goto memerr; |
| 311 |
sprintf(lp->data, "_xf%ld", xf_context->xid); |
| 312 |
} else { /* else make our own group */ |
| 313 |
lp->data = (char *)malloc(strlen(av[1])+16); |
| 314 |
if (lp->data == NULL) goto memerr; |
| 315 |
sprintf(lp->data, "_%s%ld", av[1], ++nincl); |
| 316 |
printf("%sDEF %s Group {\n", tabs, lp->data); |
| 317 |
indent(1); |
| 318 |
} |
| 319 |
} |
| 320 |
while ((i = mg_read()) > 0) { /* load include file */ |
| 321 |
if (i >= MG_MAXLINE-1) { |
| 322 |
fprintf(stderr, "%s: %d: %s\n", ictx.fname, |
| 323 |
ictx.lineno, mg_err[MG_ELINE]); |
| 324 |
mg_close(); |
| 325 |
return(MG_EINCL); |
| 326 |
} |
| 327 |
if ((i = mg_parse()) != MG_OK) { |
| 328 |
fprintf(stderr, "%s: %d: %s:\n%s", ictx.fname, |
| 329 |
ictx.lineno, mg_err[i], |
| 330 |
ictx.inpline); |
| 331 |
mg_close(); |
| 332 |
return(MG_EINCL); |
| 333 |
} |
| 334 |
} |
| 335 |
if (lp == NULL) /* end instance? */ |
| 336 |
instancing--; |
| 337 |
else if (ac <= 2) { /* else end group? */ |
| 338 |
indent(0); |
| 339 |
printf("%s}\n", tabs); |
| 340 |
} |
| 341 |
mg_close(); /* close and end transform */ |
| 342 |
if (ac > 2 && (i = mg_handle(MG_E_XF, 1, xfarg)) != MG_OK) |
| 343 |
return(i); |
| 344 |
return(MG_OK); |
| 345 |
memerr: |
| 346 |
mg_close(); |
| 347 |
return(MG_EMEM); |
| 348 |
} |
| 349 |
|
| 350 |
|
| 351 |
int |
| 352 |
put_material() /* put out current material */ |
| 353 |
{ |
| 354 |
char *mname = "mat"; |
| 355 |
float rgbval[3]; |
| 356 |
|
| 357 |
if (c_cmname != NULL) |
| 358 |
mname = c_cmname; |
| 359 |
if (!c_cmaterial->clock) { /* current, just use it */ |
| 360 |
printf("%sUSE %s\n", tabs, mname); |
| 361 |
return(0); |
| 362 |
} |
| 363 |
/* else update definition */ |
| 364 |
printf("%sDEF %s Group {\n", tabs, mname); |
| 365 |
indent(1); |
| 366 |
printf("%sMaterial {\n", tabs); |
| 367 |
indent(1); |
| 368 |
mgf2rgb(&c_cmaterial->rd_c, c_cmaterial->rd, rgbval); |
| 369 |
printf("%sambientcolor %.4f %.4f %.4f\n", tabs, |
| 370 |
rgbval[0], rgbval[1], rgbval[2]); |
| 371 |
printf("%sdiffusecolor %.4f %.4f %.4f\n", tabs, |
| 372 |
rgbval[0], rgbval[1], rgbval[2]); |
| 373 |
if (c_cmaterial->rs > FTINY) { |
| 374 |
mgf2rgb(&c_cmaterial->rs_c, c_cmaterial->rs, rgbval); |
| 375 |
printf("%sspecularcolor %.4f %.4f %.4f\n", tabs, |
| 376 |
rgbval[0], rgbval[1], rgbval[2]); |
| 377 |
printf("%sshininess %.3f\n", tabs, 1.-c_cmaterial->rs_a); |
| 378 |
} |
| 379 |
if (c_cmaterial->ed > FTINY) { |
| 380 |
mgf2rgb(&c_cmaterial->ed_c, 1.0, rgbval); |
| 381 |
printf("%semissiveColor %.4f %.4f %.4f\n", tabs, |
| 382 |
rgbval[0], rgbval[1], rgbval[2]); |
| 383 |
} |
| 384 |
if (c_cmaterial->ts > FTINY) |
| 385 |
printf("%stransparency %.4f\n", tabs, |
| 386 |
c_cmaterial->ts + c_cmaterial->td); |
| 387 |
indent(0); |
| 388 |
printf("%s}\n", tabs); |
| 389 |
printf("%sShapeHints { shapeType %s }\n", tabs, |
| 390 |
c_cmaterial->sided ? "SOLID" : "UNKNOWN_SHAPE_TYPE"); |
| 391 |
indent(0); |
| 392 |
printf("%s}\n", tabs); |
| 393 |
c_cmaterial->clock = 0; |
| 394 |
return(0); |
| 395 |
} |
| 396 |
|
| 397 |
|
| 398 |
int |
| 399 |
i_face(ac, av) /* translate an N-sided face */ |
| 400 |
int ac; |
| 401 |
char **av; |
| 402 |
{ |
| 403 |
C_VERTEX *vl[MG_MAXARGC-1]; |
| 404 |
int donorms = 1; |
| 405 |
register int i; |
| 406 |
|
| 407 |
if (instancing) |
| 408 |
return(MG_OK); |
| 409 |
if (ac < 4) |
| 410 |
return(MG_EARGC); |
| 411 |
printf("%sSeparator {\n", tabs); |
| 412 |
indent(1); |
| 413 |
/* put out current material */ |
| 414 |
if (put_material() < 0) |
| 415 |
return(MG_EBADMAT); |
| 416 |
/* get vertex references */ |
| 417 |
for (i = 0; i < ac-1; i++) { |
| 418 |
if ((vl[i] = c_getvert(av[i+1])) == NULL) |
| 419 |
return(MG_EUNDEF); |
| 420 |
if (is0vect(vl[i]->n)) |
| 421 |
donorms = 0; |
| 422 |
} |
| 423 |
/* put out vertex coordinates */ |
| 424 |
printf("%sCoordinate3 {\n", tabs); |
| 425 |
indent(1); |
| 426 |
printf("%spoint [ %13.9g %13.9g %13.9g", tabs, |
| 427 |
vl[0]->p[0], vl[0]->p[1], vl[0]->p[2]); |
| 428 |
for (i = 1; i < ac-1; i++) |
| 429 |
printf(",\n%s %13.9g %13.9g %13.9g", tabs, |
| 430 |
vl[i]->p[0], vl[i]->p[1], vl[i]->p[2]); |
| 431 |
indent(0); |
| 432 |
printf(" ]\n%s}\n", tabs); |
| 433 |
/* put out normal coordinates */ |
| 434 |
if (donorms) { |
| 435 |
printf("%sNormal {\n", tabs); |
| 436 |
indent(1); |
| 437 |
printf("%svector [ %13.9g %13.9g %13.9g", tabs, |
| 438 |
vl[0]->n[0], vl[0]->p[1], vl[0]->p[2]); |
| 439 |
for (i = 1; i < ac-1; i++) |
| 440 |
printf(",\n%s %13.9g %13.9g %13.9g", tabs, |
| 441 |
vl[i]->n[0], vl[i]->n[1], vl[i]->n[2]); |
| 442 |
indent(0); |
| 443 |
printf(" ]\n%s}\n", tabs); |
| 444 |
} else |
| 445 |
printf("%sNormal { }\n", tabs); |
| 446 |
/* put out actual face */ |
| 447 |
printf("%sIndexedFaceSet {\n", tabs); |
| 448 |
indent(1); |
| 449 |
printf("%scoordIndex [", tabs); |
| 450 |
for (i = 0; i < ac-1; i++) |
| 451 |
printf(" %d", i); |
| 452 |
printf(" ]\n"); |
| 453 |
indent(0); |
| 454 |
printf("%s}\n", tabs); |
| 455 |
indent(0); |
| 456 |
printf("%s}\n", tabs); |
| 457 |
return(MG_OK); |
| 458 |
} |
| 459 |
|
| 460 |
|
| 461 |
int |
| 462 |
i_sph(ac, av) /* translate sphere description */ |
| 463 |
int ac; |
| 464 |
char **av; |
| 465 |
{ |
| 466 |
register C_VERTEX *cent; |
| 467 |
|
| 468 |
if (instancing) |
| 469 |
return(MG_OK); |
| 470 |
if (ac != 3) |
| 471 |
return(MG_EARGC); |
| 472 |
printf("%sSeparator {\n", tabs); |
| 473 |
indent(1); |
| 474 |
/* put out current material */ |
| 475 |
if (put_material() < 0) |
| 476 |
return(MG_EBADMAT); |
| 477 |
/* get center */ |
| 478 |
if ((cent = c_getvert(av[1])) == NULL) |
| 479 |
return(MG_EUNDEF); |
| 480 |
/* get radius */ |
| 481 |
if (!isflt(av[2])) |
| 482 |
return(MG_ETYPE); |
| 483 |
printf("%sTranslation { translation %13.9g %13.9g %13.9g }\n", tabs, |
| 484 |
cent->p[0], cent->p[1], cent->p[2]); |
| 485 |
printf("%sSphere { radius %s }\n", tabs, av[2]); |
| 486 |
indent(0); |
| 487 |
printf("%s}\n", tabs); |
| 488 |
return(MG_OK); |
| 489 |
} |
| 490 |
|
| 491 |
|
| 492 |
int |
| 493 |
i_cyl(ac, av) /* translate a cylinder description */ |
| 494 |
int ac; |
| 495 |
char **av; |
| 496 |
{ |
| 497 |
register C_VERTEX *v1, *v2; |
| 498 |
FVECT va; |
| 499 |
double length, angle; |
| 500 |
|
| 501 |
if (instancing) |
| 502 |
return(MG_OK); |
| 503 |
if (ac != 4) |
| 504 |
return(MG_EARGC); |
| 505 |
printf("%sSeparator {\n", tabs); |
| 506 |
indent(1); |
| 507 |
/* put out current material */ |
| 508 |
if (put_material() < 0) |
| 509 |
return(MG_EBADMAT); |
| 510 |
/* get endpoints */ |
| 511 |
if ((v1 = c_getvert(av[1])) == NULL | (v2 = c_getvert(av[3])) == NULL) |
| 512 |
return(MG_EUNDEF); |
| 513 |
/* get radius */ |
| 514 |
if (!isflt(av[2])) |
| 515 |
return(MG_ETYPE); |
| 516 |
/* compute transform */ |
| 517 |
va[0] = v2->p[0] - v1->p[0]; |
| 518 |
va[1] = v2->p[1] - v1->p[1]; |
| 519 |
va[2] = v2->p[2] - v1->p[2]; |
| 520 |
length = sqrt(DOT(va,va)); |
| 521 |
angle = 180./PI * acos(va[1]/length); |
| 522 |
printf("%sRotation { rotation %.9g %.9g %.9g %.9g }\n", tabs, |
| 523 |
va[2], 0., -va[0], angle); |
| 524 |
printf("%sTranslation { translation %13.9g %13.9g %13.9g }\n", tabs, |
| 525 |
.5*(v1->p[0]+v2->p[0]), .5*(v1->p[1]+v2->p[1]), |
| 526 |
.5*(v1->p[2]+v2->p[2])); |
| 527 |
/* open-ended */ |
| 528 |
printf("%sCylinder { parts SIDES height %13.9g radius %s }\n", tabs, |
| 529 |
length, av[2]); |
| 530 |
indent(0); |
| 531 |
printf("%s}\n", tabs); |
| 532 |
return(MG_OK); |
| 533 |
} |
