1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id$"; |
3 |
#endif |
4 |
/* |
5 |
* Parse an MGF file, converting or discarding unsupported entities |
6 |
*/ |
7 |
|
8 |
#include <stdio.h> |
9 |
#include <stdlib.h> |
10 |
#include <math.h> |
11 |
#include <ctype.h> |
12 |
#include <string.h> |
13 |
#include "parser.h" |
14 |
#include "lookup.h" |
15 |
#include "messages.h" |
16 |
|
17 |
/* |
18 |
* Global definitions of variables declared in parser.h |
19 |
*/ |
20 |
/* entity names */ |
21 |
|
22 |
char mg_ename[MG_NENTITIES][MG_MAXELEN] = MG_NAMELIST; |
23 |
|
24 |
/* Handler routines for each entity */ |
25 |
|
26 |
int (*mg_ehand[MG_NENTITIES])(); |
27 |
|
28 |
/* Handler routine for unknown entities */ |
29 |
|
30 |
int (*mg_uhand)() = mg_defuhand; |
31 |
|
32 |
unsigned mg_nunknown; /* count of unknown entities */ |
33 |
|
34 |
/* error messages */ |
35 |
|
36 |
char *mg_err[MG_NERRS] = MG_ERRLIST; |
37 |
|
38 |
MG_FCTXT *mg_file; /* current file context pointer */ |
39 |
|
40 |
int mg_nqcdivs = MG_NQCD; /* number of divisions per quarter circle */ |
41 |
|
42 |
/* |
43 |
* The idea with this parser is to compensate for any missing entries in |
44 |
* mg_ehand with alternate handlers that express these entities in terms |
45 |
* of others that the calling program can handle. |
46 |
* |
47 |
* In some cases, no alternate handler is possible because the entity |
48 |
* has no approximate equivalent. These entities are simply discarded. |
49 |
* |
50 |
* Certain entities are dependent on others, and mg_init() will fail |
51 |
* if the supported entities are not consistent. |
52 |
* |
53 |
* Some alternate entity handlers require that earlier entities be |
54 |
* noted in some fashion, and we therefore keep another array of |
55 |
* parallel support handlers to assist in this effort. |
56 |
*/ |
57 |
|
58 |
/* temporary settings for testing */ |
59 |
#define e_ies e_any_toss |
60 |
/* alternate handler routines */ |
61 |
|
62 |
static int e_any_toss(), /* discard unneeded entity */ |
63 |
e_ies(), /* IES luminaire file */ |
64 |
e_cct(), /* color temperature */ |
65 |
e_cmix(), /* color mixtures */ |
66 |
e_cspec(); /* color spectra */ |
67 |
|
68 |
/* alternate handler support functions */ |
69 |
|
70 |
static int (*e_supp[MG_NENTITIES])(); |
71 |
|
72 |
static char FLTFMT[] = "%.12g"; |
73 |
|
74 |
static int warpconends; /* hack for generating good normals */ |
75 |
|
76 |
|
77 |
void |
78 |
mg_init() /* initialize alternate entity handlers */ |
79 |
{ |
80 |
unsigned long ineed = 0, uneed = 0; |
81 |
register int i; |
82 |
/* pick up slack */ |
83 |
if (mg_ehand[MG_E_IES] == NULL) |
84 |
mg_ehand[MG_E_IES] = e_ies; |
85 |
if (mg_ehand[MG_E_INCLUDE] == NULL) |
86 |
mg_ehand[MG_E_INCLUDE] = e_include; |
87 |
if (mg_ehand[MG_E_SPH] == NULL) { |
88 |
mg_ehand[MG_E_SPH] = e_sph; |
89 |
ineed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX; |
90 |
} else |
91 |
uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<MG_E_XF; |
92 |
if (mg_ehand[MG_E_CYL] == NULL) { |
93 |
mg_ehand[MG_E_CYL] = e_cyl; |
94 |
ineed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX; |
95 |
} else |
96 |
uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<MG_E_XF; |
97 |
if (mg_ehand[MG_E_CONE] == NULL) { |
98 |
mg_ehand[MG_E_CONE] = e_cone; |
99 |
ineed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX; |
100 |
} else |
101 |
uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<MG_E_XF; |
102 |
if (mg_ehand[MG_E_RING] == NULL) { |
103 |
mg_ehand[MG_E_RING] = e_ring; |
104 |
ineed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX; |
105 |
} else |
106 |
uneed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX|1L<<MG_E_XF; |
107 |
if (mg_ehand[MG_E_PRISM] == NULL) { |
108 |
mg_ehand[MG_E_PRISM] = e_prism; |
109 |
ineed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX; |
110 |
} else |
111 |
uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<MG_E_XF; |
112 |
if (mg_ehand[MG_E_TORUS] == NULL) { |
113 |
mg_ehand[MG_E_TORUS] = e_torus; |
114 |
ineed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX; |
115 |
} else |
116 |
uneed |= 1L<<MG_E_POINT|1L<<MG_E_NORMAL|1L<<MG_E_VERTEX|1L<<MG_E_XF; |
117 |
if (mg_ehand[MG_E_FACE] == NULL) |
118 |
mg_ehand[MG_E_FACE] = mg_ehand[MG_E_FACEH]; |
119 |
else if (mg_ehand[MG_E_FACEH] == NULL) |
120 |
mg_ehand[MG_E_FACEH] = e_faceh; |
121 |
if (mg_ehand[MG_E_COLOR] != NULL) { |
122 |
if (mg_ehand[MG_E_CMIX] == NULL) { |
123 |
mg_ehand[MG_E_CMIX] = e_cmix; |
124 |
ineed |= 1L<<MG_E_COLOR|1L<<MG_E_CXY|1L<<MG_E_CSPEC|1L<<MG_E_CMIX|1L<<MG_E_CCT; |
125 |
} |
126 |
if (mg_ehand[MG_E_CSPEC] == NULL) { |
127 |
mg_ehand[MG_E_CSPEC] = e_cspec; |
128 |
ineed |= 1L<<MG_E_COLOR|1L<<MG_E_CXY|1L<<MG_E_CSPEC|1L<<MG_E_CMIX|1L<<MG_E_CCT; |
129 |
} |
130 |
if (mg_ehand[MG_E_CCT] == NULL) { |
131 |
mg_ehand[MG_E_CCT] = e_cct; |
132 |
ineed |= 1L<<MG_E_COLOR|1L<<MG_E_CXY|1L<<MG_E_CSPEC|1L<<MG_E_CMIX|1L<<MG_E_CCT; |
133 |
} |
134 |
} |
135 |
/* check for consistency */ |
136 |
if (mg_ehand[MG_E_FACE] != NULL) |
137 |
uneed |= 1L<<MG_E_POINT|1L<<MG_E_VERTEX|1L<<MG_E_XF; |
138 |
if (mg_ehand[MG_E_CXY] != NULL || mg_ehand[MG_E_CSPEC] != NULL || |
139 |
mg_ehand[MG_E_CMIX] != NULL) |
140 |
uneed |= 1L<<MG_E_COLOR; |
141 |
if (mg_ehand[MG_E_RD] != NULL || mg_ehand[MG_E_TD] != NULL || |
142 |
mg_ehand[MG_E_IR] != NULL || |
143 |
mg_ehand[MG_E_ED] != NULL || |
144 |
mg_ehand[MG_E_RS] != NULL || |
145 |
mg_ehand[MG_E_TS] != NULL || |
146 |
mg_ehand[MG_E_SIDES] != NULL) |
147 |
uneed |= 1L<<MG_E_MATERIAL; |
148 |
for (i = 0; i < MG_NENTITIES; i++) |
149 |
if (uneed & 1L<<i && mg_ehand[i] == NULL) { |
150 |
fprintf(stderr, "Missing support for \"%s\" entity\n", |
151 |
mg_ename[i]); |
152 |
exit(1); |
153 |
} |
154 |
/* add support as needed */ |
155 |
if (ineed & 1L<<MG_E_VERTEX && mg_ehand[MG_E_VERTEX] != c_hvertex) |
156 |
e_supp[MG_E_VERTEX] = c_hvertex; |
157 |
if (ineed & 1L<<MG_E_POINT && mg_ehand[MG_E_POINT] != c_hvertex) |
158 |
e_supp[MG_E_POINT] = c_hvertex; |
159 |
if (ineed & 1L<<MG_E_NORMAL && mg_ehand[MG_E_NORMAL] != c_hvertex) |
160 |
e_supp[MG_E_NORMAL] = c_hvertex; |
161 |
if (ineed & 1L<<MG_E_COLOR && mg_ehand[MG_E_COLOR] != c_hcolor) |
162 |
e_supp[MG_E_COLOR] = c_hcolor; |
163 |
if (ineed & 1L<<MG_E_CXY && mg_ehand[MG_E_CXY] != c_hcolor) |
164 |
e_supp[MG_E_CXY] = c_hcolor; |
165 |
if (ineed & 1L<<MG_E_CSPEC && mg_ehand[MG_E_CSPEC] != c_hcolor) |
166 |
e_supp[MG_E_CSPEC] = c_hcolor; |
167 |
if (ineed & 1L<<MG_E_CMIX && mg_ehand[MG_E_CMIX] != c_hcolor) |
168 |
e_supp[MG_E_CMIX] = c_hcolor; |
169 |
if (ineed & 1L<<MG_E_CCT && mg_ehand[MG_E_CCT] != c_hcolor) |
170 |
e_supp[MG_E_CCT] = c_hcolor; |
171 |
/* discard remaining entities */ |
172 |
for (i = 0; i < MG_NENTITIES; i++) |
173 |
if (mg_ehand[i] == NULL) |
174 |
mg_ehand[i] = e_any_toss; |
175 |
} |
176 |
|
177 |
|
178 |
int |
179 |
mg_entity(name) /* get entity number from its name */ |
180 |
char *name; |
181 |
{ |
182 |
static LUTAB ent_tab = LU_SINIT(NULL,NULL); /* lookup table */ |
183 |
register char *cp; |
184 |
|
185 |
if (!ent_tab.tsiz) { /* initialize hash table */ |
186 |
if (!lu_init(&ent_tab, MG_NENTITIES)) |
187 |
return(-1); /* what to do? */ |
188 |
for (cp = mg_ename[MG_NENTITIES-1]; cp >= mg_ename[0]; |
189 |
cp -= sizeof(mg_ename[0])) |
190 |
lu_find(&ent_tab, cp)->key = cp; |
191 |
} |
192 |
cp = lu_find(&ent_tab, name)->key; |
193 |
if (cp == NULL) |
194 |
return(-1); |
195 |
return((cp - mg_ename[0])/sizeof(mg_ename[0])); |
196 |
} |
197 |
|
198 |
|
199 |
int |
200 |
mg_handle(en, ac, av) /* pass entity to appropriate handler */ |
201 |
register int en; |
202 |
int ac; |
203 |
char **av; |
204 |
{ |
205 |
int rv; |
206 |
|
207 |
if (en < 0 && (en = mg_entity(av[0])) < 0) { /* unknown entity */ |
208 |
if (mg_uhand != NULL) |
209 |
return((*mg_uhand)(ac, av)); |
210 |
return(MG_EUNK); |
211 |
} |
212 |
if (e_supp[en] != NULL) { /* support handler */ |
213 |
if ((rv = (*e_supp[en])(ac, av)) != MG_OK) |
214 |
return(rv); |
215 |
} |
216 |
return((*mg_ehand[en])(ac, av)); /* assigned handler */ |
217 |
} |
218 |
|
219 |
|
220 |
int |
221 |
mg_open(ctx, fn) /* open new input file */ |
222 |
register MG_FCTXT *ctx; |
223 |
char *fn; |
224 |
{ |
225 |
static int nfids; |
226 |
register char *cp; |
227 |
|
228 |
ctx->fid = ++nfids; |
229 |
ctx->lineno = 0; |
230 |
if (fn == NULL) { |
231 |
strcpy(ctx->fname, "<stdin>"); |
232 |
ctx->fp = stdin; |
233 |
ctx->prev = mg_file; |
234 |
mg_file = ctx; |
235 |
return(MG_OK); |
236 |
} |
237 |
/* get name relative to this context */ |
238 |
if (fn[0] != '/' && mg_file != NULL && |
239 |
(cp = strrchr(mg_file->fname, '/')) != NULL) { |
240 |
strcpy(ctx->fname, mg_file->fname); |
241 |
strcpy(ctx->fname+(cp-mg_file->fname+1), fn); |
242 |
} else |
243 |
strcpy(ctx->fname, fn); |
244 |
ctx->fp = fopen(ctx->fname, "r"); |
245 |
if (ctx->fp == NULL) |
246 |
return(MG_ENOFILE); |
247 |
ctx->prev = mg_file; /* establish new context */ |
248 |
mg_file = ctx; |
249 |
return(MG_OK); |
250 |
} |
251 |
|
252 |
|
253 |
void |
254 |
mg_close() /* close input file */ |
255 |
{ |
256 |
register MG_FCTXT *ctx = mg_file; |
257 |
|
258 |
mg_file = ctx->prev; /* restore enclosing context */ |
259 |
if (ctx->fp != stdin) /* close file if it's a file */ |
260 |
fclose(ctx->fp); |
261 |
} |
262 |
|
263 |
|
264 |
void |
265 |
mg_fgetpos(pos) /* get current position in input file */ |
266 |
register MG_FPOS *pos; |
267 |
{ |
268 |
pos->fid = mg_file->fid; |
269 |
pos->lineno = mg_file->lineno; |
270 |
pos->offset = ftell(mg_file->fp); |
271 |
} |
272 |
|
273 |
|
274 |
int |
275 |
mg_fgoto(pos) /* reposition input file pointer */ |
276 |
register MG_FPOS *pos; |
277 |
{ |
278 |
if (pos->fid != mg_file->fid) |
279 |
return(MG_ESEEK); |
280 |
if (pos->lineno == mg_file->lineno) |
281 |
return(MG_OK); |
282 |
if (mg_file->fp == stdin) |
283 |
return(MG_ESEEK); /* cannot seek on standard input */ |
284 |
if (fseek(mg_file->fp, pos->offset, 0) == EOF) |
285 |
return(MG_ESEEK); |
286 |
mg_file->lineno = pos->lineno; |
287 |
return(MG_OK); |
288 |
} |
289 |
|
290 |
|
291 |
int |
292 |
mg_read() /* read next line from file */ |
293 |
{ |
294 |
register int len = 0; |
295 |
|
296 |
do { |
297 |
if (fgets(mg_file->inpline+len, |
298 |
MG_MAXLINE-len, mg_file->fp) == NULL) |
299 |
return(len); |
300 |
len += strlen(mg_file->inpline+len); |
301 |
if (len >= MG_MAXLINE-1) |
302 |
return(len); |
303 |
mg_file->lineno++; |
304 |
} while (len > 1 && mg_file->inpline[len-2] == '\\'); |
305 |
|
306 |
return(len); |
307 |
} |
308 |
|
309 |
|
310 |
int |
311 |
mg_parse() /* parse current input line */ |
312 |
{ |
313 |
char abuf[MG_MAXLINE]; |
314 |
char *argv[MG_MAXARGC]; |
315 |
register char *cp, *cp2, **ap; |
316 |
/* copy line, removing escape chars */ |
317 |
cp = abuf; cp2 = mg_file->inpline; |
318 |
while ((*cp++ = *cp2++)) |
319 |
if (cp2[0] == '\n' && cp2[-1] == '\\') |
320 |
cp--; |
321 |
cp = abuf; ap = argv; /* break into words */ |
322 |
for ( ; ; ) { |
323 |
while (isspace(*cp)) |
324 |
*cp++ = '\0'; |
325 |
if (!*cp) |
326 |
break; |
327 |
if (ap - argv >= MG_MAXARGC-1) |
328 |
return(MG_EARGC); |
329 |
*ap++ = cp; |
330 |
while (*++cp && !isspace(*cp)) |
331 |
; |
332 |
} |
333 |
if (ap == argv) |
334 |
return(MG_OK); /* no words in line */ |
335 |
*ap = NULL; |
336 |
/* else handle it */ |
337 |
return(mg_handle(-1, ap-argv, argv)); |
338 |
} |
339 |
|
340 |
|
341 |
int |
342 |
mg_load(fn) /* load an MGF file */ |
343 |
char *fn; |
344 |
{ |
345 |
MG_FCTXT cntxt; |
346 |
int rval; |
347 |
register int nbr; |
348 |
|
349 |
if ((rval = mg_open(&cntxt, fn)) != MG_OK) { |
350 |
fprintf(stderr, "%s: %s\n", fn, mg_err[rval]); |
351 |
return(rval); |
352 |
} |
353 |
while ((nbr = mg_read()) > 0) { /* parse each line */ |
354 |
if (nbr >= MG_MAXLINE-1) { |
355 |
fprintf(stderr, "%s: %d: %s\n", cntxt.fname, |
356 |
cntxt.lineno, mg_err[rval=MG_ELINE]); |
357 |
break; |
358 |
} |
359 |
if ((rval = mg_parse()) != MG_OK) { |
360 |
fprintf(stderr, "%s: %d: %s:\n%s", cntxt.fname, |
361 |
cntxt.lineno, mg_err[rval], |
362 |
cntxt.inpline); |
363 |
break; |
364 |
} |
365 |
} |
366 |
mg_close(); |
367 |
return(rval); |
368 |
} |
369 |
|
370 |
|
371 |
int |
372 |
mg_defuhand(ac, av) /* default handler for unknown entities */ |
373 |
int ac; |
374 |
char **av; |
375 |
{ |
376 |
if (mg_nunknown++ == 0) /* report first incident */ |
377 |
fprintf(stderr, "%s: %d: %s: %s\n", mg_file->fname, |
378 |
mg_file->lineno, mg_err[MG_EUNK], av[0]); |
379 |
return(MG_OK); |
380 |
} |
381 |
|
382 |
|
383 |
void |
384 |
mg_clear() /* clear parser history */ |
385 |
{ |
386 |
c_clearall(); /* clear context tables */ |
387 |
while (mg_file != NULL) /* reset our file context */ |
388 |
mg_close(); |
389 |
} |
390 |
|
391 |
|
392 |
/**************************************************************************** |
393 |
* The following routines handle unsupported entities |
394 |
*/ |
395 |
|
396 |
|
397 |
static int |
398 |
e_any_toss(ac, av) /* discard an unwanted entity */ |
399 |
int ac; |
400 |
char **av; |
401 |
{ |
402 |
return(MG_OK); |
403 |
} |
404 |
|
405 |
|
406 |
int |
407 |
e_include(ac, av) /* include file */ |
408 |
int ac; |
409 |
char **av; |
410 |
{ |
411 |
char *xfarg[MG_MAXARGC]; |
412 |
MG_FCTXT ictx; |
413 |
XF_SPEC *xf_orig = xf_context; |
414 |
register int rv; |
415 |
|
416 |
if (ac < 2) |
417 |
return(MG_EARGC); |
418 |
if ((rv = mg_open(&ictx, av[1])) != MG_OK) |
419 |
return(rv); |
420 |
if (ac > 2) { |
421 |
register int i; |
422 |
|
423 |
xfarg[0] = mg_ename[MG_E_XF]; |
424 |
for (i = 1; i < ac-1; i++) |
425 |
xfarg[i] = av[i+1]; |
426 |
xfarg[ac-1] = NULL; |
427 |
if ((rv = mg_handle(MG_E_XF, ac-1, xfarg)) != MG_OK) { |
428 |
mg_close(); |
429 |
return(rv); |
430 |
} |
431 |
} |
432 |
do { |
433 |
while ((rv = mg_read()) > 0) { |
434 |
if (rv >= MG_MAXLINE-1) { |
435 |
fprintf(stderr, "%s: %d: %s\n", ictx.fname, |
436 |
ictx.lineno, mg_err[MG_ELINE]); |
437 |
mg_close(); |
438 |
return(MG_EINCL); |
439 |
} |
440 |
if ((rv = mg_parse()) != MG_OK) { |
441 |
fprintf(stderr, "%s: %d: %s:\n%s", ictx.fname, |
442 |
ictx.lineno, mg_err[rv], |
443 |
ictx.inpline); |
444 |
mg_close(); |
445 |
return(MG_EINCL); |
446 |
} |
447 |
} |
448 |
if (ac > 2) |
449 |
if ((rv = mg_handle(MG_E_XF, 1, xfarg)) != MG_OK) { |
450 |
mg_close(); |
451 |
return(rv); |
452 |
} |
453 |
} while (xf_context != xf_orig); |
454 |
mg_close(); |
455 |
return(MG_OK); |
456 |
} |
457 |
|
458 |
|
459 |
int |
460 |
e_faceh(ac, av) /* replace face+holes with single contour */ |
461 |
int ac; |
462 |
char **av; |
463 |
{ |
464 |
char *newav[MG_MAXARGC]; |
465 |
int lastp = 0; |
466 |
register int i, j; |
467 |
|
468 |
newav[0] = mg_ename[MG_E_FACE]; |
469 |
for (i = 1; i < ac; i++) |
470 |
if (av[i][0] == '-') { |
471 |
if (i < 4) |
472 |
return(MG_EARGC); |
473 |
if (i >= ac-1) |
474 |
break; |
475 |
if (!lastp) |
476 |
lastp = i-1; |
477 |
for (j = i+1; j < ac-1 && av[j+1][0] != '-'; j++) |
478 |
; |
479 |
if (j - i < 3) |
480 |
return(MG_EARGC); |
481 |
newav[i] = av[j]; /* connect hole loop */ |
482 |
} else |
483 |
newav[i] = av[i]; /* hole or perimeter vertex */ |
484 |
if (lastp) |
485 |
newav[i++] = av[lastp]; /* finish seam to outside */ |
486 |
newav[i] = NULL; |
487 |
return(mg_handle(MG_E_FACE, i, newav)); |
488 |
} |
489 |
|
490 |
|
491 |
static void |
492 |
make_axes(u, v, w) /* compute u and v given w (normalized) */ |
493 |
FVECT u, v, w; |
494 |
{ |
495 |
register int i; |
496 |
|
497 |
v[0] = v[1] = v[2] = 0.; |
498 |
for (i = 0; i < 3; i++) |
499 |
if (w[i] < .6 && w[i] > -.6) |
500 |
break; |
501 |
v[i] = 1.; |
502 |
fcross(u, v, w); |
503 |
normalize(u); |
504 |
fcross(v, w, u); |
505 |
} |
506 |
|
507 |
|
508 |
int |
509 |
e_sph(ac, av) /* expand a sphere into cones */ |
510 |
int ac; |
511 |
char **av; |
512 |
{ |
513 |
static char p2x[24], p2y[24], p2z[24], r1[24], r2[24]; |
514 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_sv1","=","_sv2"}; |
515 |
static char *v2ent[4] = {mg_ename[MG_E_VERTEX],"_sv2","="}; |
516 |
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2x,p2y,p2z}; |
517 |
static char *conent[6] = {mg_ename[MG_E_CONE],"_sv1",r1,"_sv2",r2}; |
518 |
register C_VERTEX *cv; |
519 |
register int i; |
520 |
int rval; |
521 |
double rad; |
522 |
double theta; |
523 |
|
524 |
if (ac != 3) |
525 |
return(MG_EARGC); |
526 |
if ((cv = c_getvert(av[1])) == NULL) |
527 |
return(MG_EUNDEF); |
528 |
if (!isflt(av[2])) |
529 |
return(MG_ETYPE); |
530 |
rad = atof(av[2]); |
531 |
/* initialize */ |
532 |
warpconends = 1; |
533 |
if ((rval = mg_handle(MG_E_VERTEX, 3, v2ent)) != MG_OK) |
534 |
return(rval); |
535 |
sprintf(p2x, FLTFMT, cv->p[0]); |
536 |
sprintf(p2y, FLTFMT, cv->p[1]); |
537 |
sprintf(p2z, FLTFMT, cv->p[2]+rad); |
538 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
539 |
return(rval); |
540 |
r2[0] = '0'; r2[1] = '\0'; |
541 |
for (i = 1; i <= 2*mg_nqcdivs; i++) { |
542 |
theta = i*(PI/2)/mg_nqcdivs; |
543 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
544 |
return(rval); |
545 |
sprintf(p2z, FLTFMT, cv->p[2]+rad*cos(theta)); |
546 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
547 |
return(rval); |
548 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
549 |
return(rval); |
550 |
strcpy(r1, r2); |
551 |
sprintf(r2, FLTFMT, rad*sin(theta)); |
552 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
553 |
return(rval); |
554 |
} |
555 |
warpconends = 0; |
556 |
return(MG_OK); |
557 |
} |
558 |
|
559 |
|
560 |
int |
561 |
e_torus(ac, av) /* expand a torus into cones */ |
562 |
int ac; |
563 |
char **av; |
564 |
{ |
565 |
static char p2[3][24], r1[24], r2[24]; |
566 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_tv1","=","_tv2"}; |
567 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_tv2","="}; |
568 |
static char *p2ent[5] = {mg_ename[MG_E_POINT],p2[0],p2[1],p2[2]}; |
569 |
static char *conent[6] = {mg_ename[MG_E_CONE],"_tv1",r1,"_tv2",r2}; |
570 |
register C_VERTEX *cv; |
571 |
register int i, j; |
572 |
int rval; |
573 |
int sgn; |
574 |
double minrad, maxrad, avgrad; |
575 |
double theta; |
576 |
|
577 |
if (ac != 4) |
578 |
return(MG_EARGC); |
579 |
if ((cv = c_getvert(av[1])) == NULL) |
580 |
return(MG_EUNDEF); |
581 |
if (is0vect(cv->n)) |
582 |
return(MG_EILL); |
583 |
if (!isflt(av[2]) || !isflt(av[3])) |
584 |
return(MG_ETYPE); |
585 |
minrad = atof(av[2]); |
586 |
round0(minrad); |
587 |
maxrad = atof(av[3]); |
588 |
/* check orientation */ |
589 |
if (minrad > 0.) |
590 |
sgn = 1; |
591 |
else if (minrad < 0.) |
592 |
sgn = -1; |
593 |
else if (maxrad > 0.) |
594 |
sgn = 1; |
595 |
else if (maxrad < 0.) |
596 |
sgn = -1; |
597 |
else |
598 |
return(MG_EILL); |
599 |
if (sgn*(maxrad-minrad) <= 0.) |
600 |
return(MG_EILL); |
601 |
/* initialize */ |
602 |
warpconends = 1; |
603 |
v2ent[3] = av[1]; |
604 |
for (j = 0; j < 3; j++) |
605 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
606 |
.5*sgn*(maxrad-minrad)*cv->n[j]); |
607 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
608 |
return(rval); |
609 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
610 |
return(rval); |
611 |
sprintf(r2, FLTFMT, avgrad=.5*(minrad+maxrad)); |
612 |
/* run outer section */ |
613 |
for (i = 1; i <= 2*mg_nqcdivs; i++) { |
614 |
theta = i*(PI/2)/mg_nqcdivs; |
615 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
616 |
return(rval); |
617 |
for (j = 0; j < 3; j++) |
618 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
619 |
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]); |
620 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
621 |
return(rval); |
622 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
623 |
return(rval); |
624 |
strcpy(r1, r2); |
625 |
sprintf(r2, FLTFMT, avgrad + .5*(maxrad-minrad)*sin(theta)); |
626 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
627 |
return(rval); |
628 |
} |
629 |
/* run inner section */ |
630 |
sprintf(r2, FLTFMT, -.5*(minrad+maxrad)); |
631 |
for ( ; i <= 4*mg_nqcdivs; i++) { |
632 |
theta = i*(PI/2)/mg_nqcdivs; |
633 |
for (j = 0; j < 3; j++) |
634 |
sprintf(p2[j], FLTFMT, cv->p[j] + |
635 |
.5*sgn*(maxrad-minrad)*cos(theta)*cv->n[j]); |
636 |
if ((rval = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
637 |
return(rval); |
638 |
if ((rval = mg_handle(MG_E_VERTEX, 2, v2ent)) != MG_OK) |
639 |
return(rval); |
640 |
if ((rval = mg_handle(MG_E_POINT, 4, p2ent)) != MG_OK) |
641 |
return(rval); |
642 |
strcpy(r1, r2); |
643 |
sprintf(r2, FLTFMT, -avgrad - .5*(maxrad-minrad)*sin(theta)); |
644 |
if ((rval = mg_handle(MG_E_CONE, 5, conent)) != MG_OK) |
645 |
return(rval); |
646 |
} |
647 |
warpconends = 0; |
648 |
return(MG_OK); |
649 |
} |
650 |
|
651 |
|
652 |
int |
653 |
e_cyl(ac, av) /* replace a cylinder with equivalent cone */ |
654 |
int ac; |
655 |
char **av; |
656 |
{ |
657 |
static char *avnew[6] = {mg_ename[MG_E_CONE]}; |
658 |
|
659 |
if (ac != 4) |
660 |
return(MG_EARGC); |
661 |
avnew[1] = av[1]; |
662 |
avnew[2] = av[2]; |
663 |
avnew[3] = av[3]; |
664 |
avnew[4] = av[2]; |
665 |
return(mg_handle(MG_E_CONE, 5, avnew)); |
666 |
} |
667 |
|
668 |
|
669 |
int |
670 |
e_ring(ac, av) /* turn a ring into polygons */ |
671 |
int ac; |
672 |
char **av; |
673 |
{ |
674 |
static char p3[3][24], p4[3][24]; |
675 |
static char *nzent[5] = {mg_ename[MG_E_NORMAL],"0","0","0"}; |
676 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_rv1","="}; |
677 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_rv2","=","_rv3"}; |
678 |
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_rv3","="}; |
679 |
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]}; |
680 |
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_rv4","="}; |
681 |
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
682 |
static char *fent[6] = {mg_ename[MG_E_FACE],"_rv1","_rv2","_rv3","_rv4"}; |
683 |
register C_VERTEX *cv; |
684 |
register int i, j; |
685 |
FVECT u, v; |
686 |
double minrad, maxrad; |
687 |
int rv; |
688 |
double theta, d; |
689 |
|
690 |
if (ac != 4) |
691 |
return(MG_EARGC); |
692 |
if ((cv = c_getvert(av[1])) == NULL) |
693 |
return(MG_EUNDEF); |
694 |
if (is0vect(cv->n)) |
695 |
return(MG_EILL); |
696 |
if (!isflt(av[2]) || !isflt(av[3])) |
697 |
return(MG_ETYPE); |
698 |
minrad = atof(av[2]); |
699 |
round0(minrad); |
700 |
maxrad = atof(av[3]); |
701 |
if (minrad < 0. || maxrad <= minrad) |
702 |
return(MG_EILL); |
703 |
/* initialize */ |
704 |
make_axes(u, v, cv->n); |
705 |
for (j = 0; j < 3; j++) |
706 |
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*u[j]); |
707 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v3ent)) != MG_OK) |
708 |
return(rv); |
709 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
710 |
return(rv); |
711 |
if (minrad == 0.) { /* closed */ |
712 |
v1ent[3] = av[1]; |
713 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
714 |
return(rv); |
715 |
if ((rv = mg_handle(MG_E_NORMAL, 4, nzent)) != MG_OK) |
716 |
return(rv); |
717 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
718 |
theta = i*(PI/2)/mg_nqcdivs; |
719 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
720 |
return(rv); |
721 |
for (j = 0; j < 3; j++) |
722 |
sprintf(p3[j], FLTFMT, cv->p[j] + |
723 |
maxrad*u[j]*cos(theta) + |
724 |
maxrad*v[j]*sin(theta)); |
725 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
726 |
return(rv); |
727 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
728 |
return(rv); |
729 |
if ((rv = mg_handle(MG_E_FACE, 4, fent)) != MG_OK) |
730 |
return(rv); |
731 |
} |
732 |
} else { /* open */ |
733 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v4ent)) != MG_OK) |
734 |
return(rv); |
735 |
for (j = 0; j < 3; j++) |
736 |
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*u[j]); |
737 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
738 |
return(rv); |
739 |
v1ent[3] = "_rv4"; |
740 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
741 |
theta = i*(PI/2)/mg_nqcdivs; |
742 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
743 |
return(rv); |
744 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
745 |
return(rv); |
746 |
for (j = 0; j < 3; j++) { |
747 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
748 |
sprintf(p3[j], FLTFMT, cv->p[j] + maxrad*d); |
749 |
sprintf(p4[j], FLTFMT, cv->p[j] + minrad*d); |
750 |
} |
751 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
752 |
return(rv); |
753 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
754 |
return(rv); |
755 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v4ent)) != MG_OK) |
756 |
return(rv); |
757 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
758 |
return(rv); |
759 |
if ((rv = mg_handle(MG_E_FACE, 5, fent)) != MG_OK) |
760 |
return(rv); |
761 |
} |
762 |
} |
763 |
return(MG_OK); |
764 |
} |
765 |
|
766 |
|
767 |
int |
768 |
e_cone(ac, av) /* turn a cone into polygons */ |
769 |
int ac; |
770 |
char **av; |
771 |
{ |
772 |
static char p3[3][24], p4[3][24], n3[3][24], n4[3][24]; |
773 |
static char *v1ent[5] = {mg_ename[MG_E_VERTEX],"_cv1","="}; |
774 |
static char *v2ent[5] = {mg_ename[MG_E_VERTEX],"_cv2","=","_cv3"}; |
775 |
static char *v3ent[4] = {mg_ename[MG_E_VERTEX],"_cv3","="}; |
776 |
static char *p3ent[5] = {mg_ename[MG_E_POINT],p3[0],p3[1],p3[2]}; |
777 |
static char *n3ent[5] = {mg_ename[MG_E_NORMAL],n3[0],n3[1],n3[2]}; |
778 |
static char *v4ent[4] = {mg_ename[MG_E_VERTEX],"_cv4","="}; |
779 |
static char *p4ent[5] = {mg_ename[MG_E_POINT],p4[0],p4[1],p4[2]}; |
780 |
static char *n4ent[5] = {mg_ename[MG_E_NORMAL],n4[0],n4[1],n4[2]}; |
781 |
static char *fent[6] = {mg_ename[MG_E_FACE],"_cv1","_cv2","_cv3","_cv4"}; |
782 |
char *v1n; |
783 |
register C_VERTEX *cv1, *cv2; |
784 |
register int i, j; |
785 |
FVECT u, v, w; |
786 |
double rad1, rad2; |
787 |
int sgn; |
788 |
double n1off, n2off; |
789 |
double d; |
790 |
int rv; |
791 |
double theta; |
792 |
|
793 |
if (ac != 5) |
794 |
return(MG_EARGC); |
795 |
if ((cv1 = c_getvert(av[1])) == NULL || |
796 |
(cv2 = c_getvert(av[3])) == NULL) |
797 |
return(MG_EUNDEF); |
798 |
v1n = av[1]; |
799 |
if (!isflt(av[2]) || !isflt(av[4])) |
800 |
return(MG_ETYPE); |
801 |
rad1 = atof(av[2]); |
802 |
round0(rad1); |
803 |
rad2 = atof(av[4]); |
804 |
round0(rad2); |
805 |
if (rad1 == 0.) { |
806 |
if (rad2 == 0.) |
807 |
return(MG_EILL); |
808 |
} else if (rad2 != 0.) { |
809 |
if ((rad1 < 0.) ^ (rad2 < 0.)) |
810 |
return(MG_EILL); |
811 |
} else { /* swap */ |
812 |
C_VERTEX *cv; |
813 |
|
814 |
cv = cv1; |
815 |
cv1 = cv2; |
816 |
cv2 = cv; |
817 |
v1n = av[3]; |
818 |
d = rad1; |
819 |
rad1 = rad2; |
820 |
rad2 = d; |
821 |
} |
822 |
sgn = rad2 < 0. ? -1 : 1; |
823 |
/* initialize */ |
824 |
for (j = 0; j < 3; j++) |
825 |
w[j] = cv1->p[j] - cv2->p[j]; |
826 |
if ((d = normalize(w)) == 0.) |
827 |
return(MG_EILL); |
828 |
n1off = n2off = (rad2 - rad1)/d; |
829 |
if (warpconends) { /* hack for e_sph and e_torus */ |
830 |
d = atan(n2off) - (PI/4)/mg_nqcdivs; |
831 |
if (d <= -PI/2+FTINY) |
832 |
n2off = -FHUGE; |
833 |
else |
834 |
n2off = tan(d); |
835 |
} |
836 |
make_axes(u, v, w); |
837 |
for (j = 0; j < 3; j++) { |
838 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*u[j]); |
839 |
if (n2off <= -FHUGE) |
840 |
sprintf(n3[j], FLTFMT, -w[j]); |
841 |
else |
842 |
sprintf(n3[j], FLTFMT, u[j] + w[j]*n2off); |
843 |
} |
844 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v3ent)) != MG_OK) |
845 |
return(rv); |
846 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
847 |
return(rv); |
848 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
849 |
return(rv); |
850 |
if (rad1 == 0.) { /* triangles */ |
851 |
v1ent[3] = v1n; |
852 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
853 |
return(rv); |
854 |
for (j = 0; j < 3; j++) |
855 |
sprintf(n4[j], FLTFMT, w[j]); |
856 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
857 |
return(rv); |
858 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
859 |
theta = sgn*i*(PI/2)/mg_nqcdivs; |
860 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
861 |
return(rv); |
862 |
for (j = 0; j < 3; j++) { |
863 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
864 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d); |
865 |
if (n2off > -FHUGE) |
866 |
sprintf(n3[j], FLTFMT, d + w[j]*n2off); |
867 |
} |
868 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
869 |
return(rv); |
870 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
871 |
return(rv); |
872 |
if (n2off > -FHUGE && |
873 |
(rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
874 |
return(rv); |
875 |
if ((rv = mg_handle(MG_E_FACE, 4, fent)) != MG_OK) |
876 |
return(rv); |
877 |
} |
878 |
} else { /* quads */ |
879 |
v1ent[3] = "_cv4"; |
880 |
if (warpconends) { /* hack for e_sph and e_torus */ |
881 |
d = atan(n1off) + (PI/4)/mg_nqcdivs; |
882 |
if (d >= PI/2-FTINY) |
883 |
n1off = FHUGE; |
884 |
else |
885 |
n1off = tan(atan(n1off)+(PI/4)/mg_nqcdivs); |
886 |
} |
887 |
for (j = 0; j < 3; j++) { |
888 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*u[j]); |
889 |
if (n1off >= FHUGE) |
890 |
sprintf(n4[j], FLTFMT, w[j]); |
891 |
else |
892 |
sprintf(n4[j], FLTFMT, u[j] + w[j]*n1off); |
893 |
} |
894 |
if ((rv = mg_handle(MG_E_VERTEX, 3, v4ent)) != MG_OK) |
895 |
return(rv); |
896 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
897 |
return(rv); |
898 |
if ((rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
899 |
return(rv); |
900 |
for (i = 1; i <= 4*mg_nqcdivs; i++) { |
901 |
theta = sgn*i*(PI/2)/mg_nqcdivs; |
902 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v1ent)) != MG_OK) |
903 |
return(rv); |
904 |
if ((rv = mg_handle(MG_E_VERTEX, 4, v2ent)) != MG_OK) |
905 |
return(rv); |
906 |
for (j = 0; j < 3; j++) { |
907 |
d = u[j]*cos(theta) + v[j]*sin(theta); |
908 |
sprintf(p3[j], FLTFMT, cv2->p[j] + rad2*d); |
909 |
if (n2off > -FHUGE) |
910 |
sprintf(n3[j], FLTFMT, d + w[j]*n2off); |
911 |
sprintf(p4[j], FLTFMT, cv1->p[j] + rad1*d); |
912 |
if (n1off < FHUGE) |
913 |
sprintf(n4[j], FLTFMT, d + w[j]*n1off); |
914 |
} |
915 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v3ent)) != MG_OK) |
916 |
return(rv); |
917 |
if ((rv = mg_handle(MG_E_POINT, 4, p3ent)) != MG_OK) |
918 |
return(rv); |
919 |
if (n2off > -FHUGE && |
920 |
(rv = mg_handle(MG_E_NORMAL, 4, n3ent)) != MG_OK) |
921 |
return(rv); |
922 |
if ((rv = mg_handle(MG_E_VERTEX, 2, v4ent)) != MG_OK) |
923 |
return(rv); |
924 |
if ((rv = mg_handle(MG_E_POINT, 4, p4ent)) != MG_OK) |
925 |
return(rv); |
926 |
if (n1off < FHUGE && |
927 |
(rv = mg_handle(MG_E_NORMAL, 4, n4ent)) != MG_OK) |
928 |
return(rv); |
929 |
if ((rv = mg_handle(MG_E_FACE, 5, fent)) != MG_OK) |
930 |
return(rv); |
931 |
} |
932 |
} |
933 |
return(MG_OK); |
934 |
} |
935 |
|
936 |
|
937 |
int |
938 |
e_prism(ac, av) /* turn a prism into polygons */ |
939 |
int ac; |
940 |
char **av; |
941 |
{ |
942 |
static char p[3][24]; |
943 |
static char *vent[5] = {mg_ename[MG_E_VERTEX],NULL,"="}; |
944 |
static char *pent[5] = {mg_ename[MG_E_POINT],p[0],p[1],p[2]}; |
945 |
static char *znorm[5] = {mg_ename[MG_E_NORMAL],"0","0","0"}; |
946 |
char *newav[MG_MAXARGC], nvn[MG_MAXARGC-1][8]; |
947 |
double length; |
948 |
int hasnorm; |
949 |
FVECT v1, v2, v3, norm; |
950 |
register C_VERTEX *cv; |
951 |
C_VERTEX *cv0; |
952 |
int rv; |
953 |
register int i, j; |
954 |
/* check arguments */ |
955 |
if (ac < 5) |
956 |
return(MG_EARGC); |
957 |
if (!isflt(av[ac-1])) |
958 |
return(MG_ETYPE); |
959 |
length = atof(av[ac-1]); |
960 |
if (length <= FTINY && length >= -FTINY) |
961 |
return(MG_EILL); |
962 |
/* compute face normal */ |
963 |
if ((cv0 = c_getvert(av[1])) == NULL) |
964 |
return(MG_EUNDEF); |
965 |
hasnorm = 0; |
966 |
norm[0] = norm[1] = norm[2] = 0.; |
967 |
v1[0] = v1[1] = v1[2] = 0.; |
968 |
for (i = 2; i < ac-1; i++) { |
969 |
if ((cv = c_getvert(av[i])) == NULL) |
970 |
return(MG_EUNDEF); |
971 |
hasnorm += !is0vect(cv->n); |
972 |
v2[0] = cv->p[0] - cv0->p[0]; |
973 |
v2[1] = cv->p[1] - cv0->p[1]; |
974 |
v2[2] = cv->p[2] - cv0->p[2]; |
975 |
fcross(v3, v1, v2); |
976 |
norm[0] += v3[0]; |
977 |
norm[1] += v3[1]; |
978 |
norm[2] += v3[2]; |
979 |
VCOPY(v1, v2); |
980 |
} |
981 |
if (normalize(norm) == 0.) |
982 |
return(MG_EILL); |
983 |
/* create moved vertices */ |
984 |
for (i = 1; i < ac-1; i++) { |
985 |
sprintf(nvn[i-1], "_pv%d", i); |
986 |
vent[1] = nvn[i-1]; |
987 |
vent[3] = av[i]; |
988 |
if ((rv = mg_handle(MG_E_VERTEX, 4, vent)) != MG_OK) |
989 |
return(rv); |
990 |
cv = c_getvert(av[i]); /* checked above */ |
991 |
for (j = 0; j < 3; j++) |
992 |
sprintf(p[j], FLTFMT, cv->p[j] - length*norm[j]); |
993 |
if ((rv = mg_handle(MG_E_POINT, 4, pent)) != MG_OK) |
994 |
return(rv); |
995 |
} |
996 |
/* make faces */ |
997 |
newav[0] = mg_ename[MG_E_FACE]; |
998 |
/* do the side faces */ |
999 |
newav[5] = NULL; |
1000 |
newav[3] = av[ac-2]; |
1001 |
newav[4] = nvn[ac-3]; |
1002 |
for (i = 1; i < ac-1; i++) { |
1003 |
newav[1] = nvn[i-1]; |
1004 |
newav[2] = av[i]; |
1005 |
if ((rv = mg_handle(MG_E_FACE, 5, newav)) != MG_OK) |
1006 |
return(rv); |
1007 |
newav[3] = newav[2]; |
1008 |
newav[4] = newav[1]; |
1009 |
} |
1010 |
/* do top face */ |
1011 |
for (i = 1; i < ac-1; i++) { |
1012 |
if (hasnorm) { /* zero normals */ |
1013 |
vent[1] = nvn[i-1]; |
1014 |
if ((rv = mg_handle(MG_E_VERTEX, 2, vent)) != MG_OK) |
1015 |
return(rv); |
1016 |
if ((rv = mg_handle(MG_E_NORMAL, 4, znorm)) != MG_OK) |
1017 |
return(rv); |
1018 |
} |
1019 |
newav[ac-1-i] = nvn[i-1]; /* reverse */ |
1020 |
} |
1021 |
if ((rv = mg_handle(MG_E_FACE, ac-1, newav)) != MG_OK) |
1022 |
return(rv); |
1023 |
/* do bottom face */ |
1024 |
if (hasnorm) |
1025 |
for (i = 1; i < ac-1; i++) { |
1026 |
vent[1] = nvn[i-1]; |
1027 |
vent[3] = av[i]; |
1028 |
if ((rv = mg_handle(MG_E_VERTEX, 4, vent)) != MG_OK) |
1029 |
return(rv); |
1030 |
if ((rv = mg_handle(MG_E_NORMAL, 4, znorm)) != MG_OK) |
1031 |
return(rv); |
1032 |
newav[i] = nvn[i-1]; |
1033 |
} |
1034 |
else |
1035 |
for (i = 1; i < ac-1; i++) |
1036 |
newav[i] = av[i]; |
1037 |
newav[i] = NULL; |
1038 |
if ((rv = mg_handle(MG_E_FACE, i, newav)) != MG_OK) |
1039 |
return(rv); |
1040 |
return(MG_OK); |
1041 |
} |
1042 |
|
1043 |
|
1044 |
static int |
1045 |
put_cxy() /* put out current xy chromaticities */ |
1046 |
{ |
1047 |
static char xbuf[24], ybuf[24]; |
1048 |
static char *ccom[4] = {mg_ename[MG_E_CXY], xbuf, ybuf}; |
1049 |
|
1050 |
sprintf(xbuf, "%.4f", c_ccolor->cx); |
1051 |
sprintf(ybuf, "%.4f", c_ccolor->cy); |
1052 |
return(mg_handle(MG_E_CXY, 3, ccom)); |
1053 |
} |
1054 |
|
1055 |
|
1056 |
static int |
1057 |
put_cspec() /* put out current color spectrum */ |
1058 |
{ |
1059 |
char wl[2][6], vbuf[C_CNSS][24]; |
1060 |
char *newav[C_CNSS+4]; |
1061 |
double sf; |
1062 |
register int i; |
1063 |
|
1064 |
if (mg_ehand[MG_E_CSPEC] != c_hcolor) { |
1065 |
sprintf(wl[0], "%d", C_CMINWL); |
1066 |
sprintf(wl[1], "%d", C_CMAXWL); |
1067 |
newav[0] = mg_ename[MG_E_CSPEC]; |
1068 |
newav[1] = wl[0]; |
1069 |
newav[2] = wl[1]; |
1070 |
sf = (double)C_CNSS / c_ccolor->ssum; |
1071 |
for (i = 0; i < C_CNSS; i++) { |
1072 |
sprintf(vbuf[i], "%.4f", sf*c_ccolor->ssamp[i]); |
1073 |
newav[i+3] = vbuf[i]; |
1074 |
} |
1075 |
newav[C_CNSS+3] = NULL; |
1076 |
if ((i = mg_handle(MG_E_CSPEC, C_CNSS+3, newav)) != MG_OK) |
1077 |
return(i); |
1078 |
} |
1079 |
return(MG_OK); |
1080 |
} |
1081 |
|
1082 |
|
1083 |
static int |
1084 |
e_cspec(ac, av) /* handle spectral color */ |
1085 |
int ac; |
1086 |
char **av; |
1087 |
{ |
1088 |
/* convert to xy chromaticity */ |
1089 |
c_ccvt(c_ccolor, C_CSXY); |
1090 |
/* if it's really their handler, use it */ |
1091 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1092 |
return(put_cxy()); |
1093 |
return(MG_OK); |
1094 |
} |
1095 |
|
1096 |
|
1097 |
static int |
1098 |
e_cmix(ac, av) /* handle mixing of colors */ |
1099 |
int ac; |
1100 |
char **av; |
1101 |
{ |
1102 |
/* |
1103 |
* Contorted logic works as follows: |
1104 |
* 1. the colors are already mixed in c_hcolor() support function |
1105 |
* 2. if we would handle a spectral result, make sure it's not |
1106 |
* 3. if c_hcolor() would handle a spectral result, don't bother |
1107 |
* 4. otherwise, make cspec entity and pass it to their handler |
1108 |
* 5. if we have only xy results, handle it as c_spec() would |
1109 |
*/ |
1110 |
if (mg_ehand[MG_E_CSPEC] == e_cspec) |
1111 |
c_ccvt(c_ccolor, C_CSXY); |
1112 |
else if (c_ccolor->flags & C_CDSPEC) |
1113 |
return(put_cspec()); |
1114 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1115 |
return(put_cxy()); |
1116 |
return(MG_OK); |
1117 |
} |
1118 |
|
1119 |
|
1120 |
static int |
1121 |
e_cct(ac, av) /* handle color temperature */ |
1122 |
int ac; |
1123 |
char **av; |
1124 |
{ |
1125 |
/* |
1126 |
* Logic is similar to e_cmix here. Support handler has already |
1127 |
* converted temperature to spectral color. Put it out as such |
1128 |
* if they support it, otherwise convert to xy chromaticity and |
1129 |
* put it out if they handle it. |
1130 |
*/ |
1131 |
if (mg_ehand[MG_E_CSPEC] != e_cspec) |
1132 |
return(put_cspec()); |
1133 |
c_ccvt(c_ccolor, C_CSXY); |
1134 |
if (mg_ehand[MG_E_CXY] != c_hcolor) |
1135 |
return(put_cxy()); |
1136 |
return(MG_OK); |
1137 |
} |