1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id$"; |
3 |
#endif |
4 |
/* |
5 |
* Routines for loading and displaying Radiance objects in rholo with GLX. |
6 |
*/ |
7 |
|
8 |
#include "radogl.h" |
9 |
#include "tonemap.h" |
10 |
#include "rhdisp.h" |
11 |
#include "rhdriver.h" |
12 |
#include "rhdobj.h" |
13 |
|
14 |
extern FILE *sstdout; /* user standard output */ |
15 |
|
16 |
char rhdcmd[DO_NCMDS][8] = DO_INIT; /* user command list */ |
17 |
|
18 |
int (*dobj_lightsamp)() = NULL; /* pointer to function to get lights */ |
19 |
|
20 |
#define AVGREFL 0.5 /* assumed average reflectance */ |
21 |
|
22 |
#define MAXAC 512 /* maximum number of args */ |
23 |
|
24 |
#ifndef MINTHRESH |
25 |
#define MINTHRESH 5.0 /* source threshold w.r.t. mean */ |
26 |
#endif |
27 |
|
28 |
#ifndef NALT |
29 |
#define NALT 11 /* # sampling altitude angles */ |
30 |
#endif |
31 |
#ifndef NAZI |
32 |
#define NAZI ((int)(PI/2.*NALT+.5)) |
33 |
#endif |
34 |
|
35 |
typedef struct dlights { |
36 |
struct dlights *next; /* next in lighting set list */ |
37 |
FVECT lcent; /* computed lighting center */ |
38 |
double ravg; /* harmonic mean free range radius */ |
39 |
TMbright larb; /* average reflected brightness */ |
40 |
COLOR lamb; /* local ambient value */ |
41 |
short nl; /* number of lights in this set */ |
42 |
struct lsource { |
43 |
FVECT direc; /* source direction */ |
44 |
double omega; /* source solid angle */ |
45 |
COLOR val; /* source color */ |
46 |
} li[MAXLIGHTS]; /* light sources */ |
47 |
} DLIGHTS; /* a light source set */ |
48 |
|
49 |
typedef struct dobject { |
50 |
struct dobject *next; /* next object in list */ |
51 |
char name[64]; /* object name */ |
52 |
FVECT center; /* orig. object center */ |
53 |
FLOAT radius; /* orig. object radius */ |
54 |
int listid; /* GL display list identifier */ |
55 |
int nlists; /* number of lists allocated */ |
56 |
int rtp[3]; /* associated rtrace process */ |
57 |
DLIGHTS *ol; /* object lights */ |
58 |
FULLXF xfb; /* coordinate transform */ |
59 |
short drawcode; /* drawing code */ |
60 |
short xfac; /* transform argument count */ |
61 |
char *xfav[MAXAC+1]; /* transform args */ |
62 |
} DOBJECT; /* a displayable object */ |
63 |
|
64 |
static DLIGHTS *dlightsets; /* lighting sets */ |
65 |
static DOBJECT *dobjects; /* display object list */ |
66 |
static DOBJECT *curobj; /* current (last referred) object */ |
67 |
static int lastxfac; /* last number of transform args */ |
68 |
static char *lastxfav[MAXAC+1]; /* saved transform arguments */ |
69 |
|
70 |
#define getdcent(c,op) multp3(c,(op)->center,(op)->xfb.f.xfm) |
71 |
#define getdrad(op) ((op)->radius*(op)->xfb.f.sca) |
72 |
|
73 |
#define RTARGC 8 |
74 |
static char *rtargv[RTARGC+1] = {"rtrace", "-h-", "-w-", "-fdd", |
75 |
"-x", "1", "-oL"}; |
76 |
|
77 |
static struct { |
78 |
int nsamp; /* number of ray samples */ |
79 |
COLOR val; /* value (sum) */ |
80 |
} ssamp[NALT][NAZI]; /* current sphere samples */ |
81 |
|
82 |
#define curname (curobj==NULL ? (char *)NULL : curobj->name) |
83 |
|
84 |
|
85 |
static DOBJECT * |
86 |
getdobj(nm) /* get object from list by name */ |
87 |
char *nm; |
88 |
{ |
89 |
register DOBJECT *op; |
90 |
|
91 |
if (nm == NULL) |
92 |
return(NULL); |
93 |
if (nm == curname) |
94 |
return(curobj); |
95 |
for (op = dobjects; op != NULL; op = op->next) |
96 |
if (!strcmp(op->name, nm)) |
97 |
break; |
98 |
return(op); |
99 |
} |
100 |
|
101 |
|
102 |
static |
103 |
freedobj(op) /* free resources and memory assoc. with op */ |
104 |
register DOBJECT *op; |
105 |
{ |
106 |
int foundlink = 0; |
107 |
DOBJECT ohead; |
108 |
register DOBJECT *opl; |
109 |
|
110 |
if (op == NULL) |
111 |
return(0); |
112 |
ohead.next = dobjects; |
113 |
for (opl = &ohead; opl->next != NULL; opl = opl->next) { |
114 |
if (opl->next == op && (opl->next = op->next) == NULL) |
115 |
break; |
116 |
foundlink += opl->next->listid == op->listid; |
117 |
} |
118 |
dobjects = ohead.next; |
119 |
if (!foundlink) { |
120 |
glDeleteLists(op->listid, op->nlists); |
121 |
close_process(op->rtp); |
122 |
} |
123 |
while (op->xfac) |
124 |
freestr(op->xfav[--op->xfac]); |
125 |
free((void *)op); |
126 |
return(1); |
127 |
} |
128 |
|
129 |
|
130 |
static |
131 |
savedxf(op) /* save transform for display object */ |
132 |
register DOBJECT *op; |
133 |
{ |
134 |
/* free old */ |
135 |
while (lastxfac) |
136 |
freestr(lastxfav[--lastxfac]); |
137 |
/* nothing to save? */ |
138 |
if (op == NULL) { |
139 |
lastxfav[0] = NULL; |
140 |
return(0); |
141 |
} |
142 |
/* else save new */ |
143 |
for (lastxfac = 0; lastxfac < op->xfac; lastxfac++) |
144 |
lastxfav[lastxfac] = savestr(op->xfav[lastxfac]); |
145 |
lastxfav[lastxfac] = NULL; |
146 |
return(1); |
147 |
} |
148 |
|
149 |
|
150 |
static |
151 |
ssph_sample(clr, direc, pos) /* add sample to current source sphere */ |
152 |
COLR clr; |
153 |
FVECT direc, pos; |
154 |
{ |
155 |
COLOR col; |
156 |
double d; |
157 |
register int alt, azi; |
158 |
|
159 |
if (dlightsets == NULL) |
160 |
return; |
161 |
if (pos == NULL) |
162 |
d = FHUGE; /* sample is at infinity */ |
163 |
else if ((d = (pos[0] - dlightsets->lcent[0])*direc[0] + |
164 |
(pos[1] - dlightsets->lcent[1])*direc[1] + |
165 |
(pos[2] - dlightsets->lcent[2])*direc[2]) > FTINY) |
166 |
dlightsets->ravg += 1./d; |
167 |
else |
168 |
return; /* sample is behind us */ |
169 |
alt = NALT*(1.-FTINY)*(.5*(1.+FTINY) + direc[2]*.5); |
170 |
azi = NAZI*(1.-FTINY)*(.5*(1.+FTINY) + .5/PI*atan2(direc[1],direc[0])); |
171 |
colr_color(col, clr); |
172 |
addcolor(ssamp[alt][azi].val, col); |
173 |
ssamp[alt][azi].nsamp++; |
174 |
} |
175 |
|
176 |
|
177 |
static |
178 |
ssph_direc(direc, alt, azi) /* compute sphere sampling direction */ |
179 |
FVECT direc; |
180 |
int alt, azi; |
181 |
{ |
182 |
double phi, d; |
183 |
|
184 |
direc[2] = 2./NALT*(alt+.5) - 1.; |
185 |
d = sqrt(1. - direc[2]*direc[2]); |
186 |
phi = 2.*PI/NAZI*(azi+.5) - PI; |
187 |
direc[0] = d*cos(phi); |
188 |
direc[1] = d*sin(phi); |
189 |
} |
190 |
|
191 |
|
192 |
static int |
193 |
ssph_neigh(sp, next) /* neighbor counter on sphere */ |
194 |
register int sp[2]; |
195 |
int next; |
196 |
{ |
197 |
static short nneigh = 0; /* neighbor count */ |
198 |
static short neighlist[NAZI+6][2]; /* neighbor list (0 is home) */ |
199 |
register int i; |
200 |
|
201 |
if (next) { |
202 |
if (nneigh <= 0) |
203 |
return(0); |
204 |
sp[0] = neighlist[--nneigh][0]; |
205 |
sp[1] = neighlist[nneigh][1]; |
206 |
return(1); |
207 |
} |
208 |
if (sp[0] < 0 | sp[0] >= NALT | sp[1] < 0 | sp[1] >= NAZI) |
209 |
return(nneigh=0); |
210 |
neighlist[0][0] = sp[0]; neighlist[0][1] = sp[1]; |
211 |
nneigh = 1; |
212 |
if (sp[0] == 0) { |
213 |
neighlist[nneigh][0] = 1; |
214 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
215 |
neighlist[nneigh][0] = 1; |
216 |
neighlist[nneigh++][1] = sp[1]; |
217 |
neighlist[nneigh][0] = 1; |
218 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
219 |
for (i = 0; i < NAZI; i++) |
220 |
if (i != sp[1]) { |
221 |
neighlist[nneigh][0] = 0; |
222 |
neighlist[nneigh++][1] = i; |
223 |
} |
224 |
} else if (sp[0] == NALT-1) { |
225 |
neighlist[nneigh][0] = NALT-2; |
226 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
227 |
neighlist[nneigh][0] = NALT-2; |
228 |
neighlist[nneigh++][1] = sp[1]; |
229 |
neighlist[nneigh][0] = NALT-2; |
230 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
231 |
for (i = 0; i < NAZI; i++) |
232 |
if (i != sp[1]) { |
233 |
neighlist[nneigh][0] = NALT-1; |
234 |
neighlist[nneigh++][1] = i; |
235 |
} |
236 |
} else { |
237 |
neighlist[nneigh][0] = sp[0]-1; |
238 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
239 |
neighlist[nneigh][0] = sp[0]-1; |
240 |
neighlist[nneigh++][1] = sp[1]; |
241 |
neighlist[nneigh][0] = sp[0]-1; |
242 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
243 |
neighlist[nneigh][0] = sp[0]; |
244 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
245 |
neighlist[nneigh][0] = sp[0]; |
246 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
247 |
neighlist[nneigh][0] = sp[0]+1; |
248 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
249 |
neighlist[nneigh][0] = sp[0]+1; |
250 |
neighlist[nneigh++][1] = sp[1]; |
251 |
neighlist[nneigh][0] = sp[0]+1; |
252 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
253 |
} |
254 |
return(nneigh); |
255 |
} |
256 |
|
257 |
|
258 |
static |
259 |
ssph_compute() /* compute source set from sphere samples */ |
260 |
{ |
261 |
int ncells, nsamps; |
262 |
COLOR csum; |
263 |
FVECT v; |
264 |
double d, thresh, maxbr; |
265 |
int maxalt, maxazi, spos[2]; |
266 |
register int alt, azi; |
267 |
register struct lsource *ls; |
268 |
/* count & average sampled cells */ |
269 |
setcolor(csum, 0., 0., 0.); |
270 |
ncells = nsamps = 0; |
271 |
for (alt = 0; alt < NALT; alt++) |
272 |
for (azi = 0; azi < NAZI; azi++) |
273 |
if (ssamp[alt][azi].nsamp) { |
274 |
if (ssamp[alt][azi].nsamp > 1) { |
275 |
d = 1.0/ssamp[alt][azi].nsamp; |
276 |
scalecolor(ssamp[alt][azi].val, d); |
277 |
} |
278 |
addcolor(csum, ssamp[alt][azi].val); |
279 |
nsamps += ssamp[alt][azi].nsamp; |
280 |
ncells++; |
281 |
} |
282 |
if (dlightsets == NULL | ncells < NALT*NAZI/4) { |
283 |
ncells = 0; |
284 |
goto done; |
285 |
} |
286 |
/* harmonic mean distance */ |
287 |
if (dlightsets->ravg > FTINY) |
288 |
dlightsets->ravg = nsamps / dlightsets->ravg; |
289 |
else |
290 |
dlightsets->ravg = FHUGE; |
291 |
/* light source threshold */ |
292 |
thresh = MINTHRESH*bright(csum)/ncells; |
293 |
if (thresh <= FTINY) { |
294 |
ncells = 0; |
295 |
goto done; |
296 |
} |
297 |
/* avg. reflected brightness */ |
298 |
d = AVGREFL / (double)ncells; |
299 |
scalecolor(csum, d); |
300 |
if (tmCvColors(&dlightsets->larb, TM_NOCHROM, &csum, 1) != TM_E_OK) |
301 |
error(CONSISTENCY, "tone mapping problem in ssph_compute"); |
302 |
/* greedy light source clustering */ |
303 |
while (dlightsets->nl < MAXLIGHTS) { |
304 |
maxbr = 0.; /* find brightest cell */ |
305 |
for (alt = 0; alt < NALT; alt++) |
306 |
for (azi = 0; azi < NAZI; azi++) |
307 |
if ((d = bright(ssamp[alt][azi].val)) > maxbr) { |
308 |
maxalt = alt; maxazi = azi; |
309 |
maxbr = d; |
310 |
} |
311 |
if (maxbr < thresh) /* below threshold? */ |
312 |
break; |
313 |
ls = dlightsets->li + dlightsets->nl++; |
314 |
spos[0] = maxalt; spos[1] = maxazi; /* cluster */ |
315 |
for (ssph_neigh(spos, 0); ssph_neigh(spos, 1); ) { |
316 |
alt = spos[0]; azi = spos[1]; |
317 |
if ((d = bright(ssamp[alt][azi].val)) < .75*thresh) |
318 |
continue; /* too dim */ |
319 |
ssph_direc(v, alt, azi); /* else add it in */ |
320 |
VSUM(ls->direc, ls->direc, v, d); |
321 |
ls->omega += 1.; |
322 |
addcolor(ls->val, ssamp[alt][azi].val); |
323 |
/* remove from list */ |
324 |
setcolor(ssamp[alt][azi].val, 0., 0., 0.); |
325 |
ssamp[alt][azi].nsamp = 0; |
326 |
} |
327 |
d = 1./ls->omega; /* avg. brightness */ |
328 |
scalecolor(ls->val, d); |
329 |
ls->omega *= 4.*PI/(NALT*NAZI); /* solid angle */ |
330 |
normalize(ls->direc); /* direction */ |
331 |
} |
332 |
/* compute ambient remainder */ |
333 |
for (alt = 0; alt < NALT; alt++) |
334 |
for (azi = 0; azi < NAZI; azi++) |
335 |
if (ssamp[alt][azi].nsamp) |
336 |
addcolor(dlightsets->lamb, ssamp[alt][azi].val); |
337 |
d = 1.0/ncells; |
338 |
scalecolor(dlightsets->lamb, d); |
339 |
done: /* clear sphere sample array */ |
340 |
bzero((char *)ssamp, sizeof(ssamp)); |
341 |
return(ncells); |
342 |
} |
343 |
|
344 |
|
345 |
static |
346 |
getdlights(op, force) /* get lights for display object */ |
347 |
register DOBJECT *op; |
348 |
int force; |
349 |
{ |
350 |
double d2, mind2 = FHUGE*FHUGE; |
351 |
FVECT ocent; |
352 |
VIEW cvw; |
353 |
register DLIGHTS *dl; |
354 |
|
355 |
op->ol = NULL; |
356 |
if (op->drawcode != DO_LIGHT) |
357 |
return(0); |
358 |
/* check for usable light set */ |
359 |
getdcent(ocent, op); |
360 |
for (dl = dlightsets; dl != NULL; dl = dl->next) |
361 |
if ((d2 = dist2(dl->lcent, ocent)) < mind2) { |
362 |
op->ol = dl; |
363 |
mind2 = d2; |
364 |
} |
365 |
/* the following is heuristic */ |
366 |
d2 = 2.*getdrad(op); d2 *= d2; |
367 |
if ((dl = op->ol) != NULL && (mind2 < 0.0625*dl->ravg*dl->ravg || |
368 |
mind2 < 4.*getdrad(op)*getdrad(op))) |
369 |
return(1); |
370 |
if (!force) |
371 |
return(0); |
372 |
/* need to compute new light set */ |
373 |
copystruct(&cvw, &stdview); |
374 |
cvw.type = VT_PER; |
375 |
VCOPY(cvw.vp, ocent); |
376 |
cvw.vup[0] = 1.; cvw.vup[1] = cvw.vup[2] = 0.; |
377 |
cvw.horiz = 90; cvw.vert = 90.; |
378 |
beam_init(1); /* query beams through center */ |
379 |
cvw.vdir[0] = cvw.vdir[1] = 0.; cvw.vdir[2] = 1.; |
380 |
setview(&cvw); beam_view(&cvw, 0, 0); |
381 |
cvw.vdir[0] = cvw.vdir[1] = 0.; cvw.vdir[2] = -1.; |
382 |
setview(&cvw); beam_view(&cvw, 0, 0); |
383 |
cvw.vup[0] = cvw.vup[1] = 0.; cvw.vup[2] = 1.; |
384 |
cvw.vdir[0] = cvw.vdir[2] = 0.; cvw.vdir[1] = 1.; |
385 |
setview(&cvw); beam_view(&cvw, 0, 0); |
386 |
cvw.vdir[0] = cvw.vdir[2] = 0.; cvw.vdir[1] = -1.; |
387 |
setview(&cvw); beam_view(&cvw, 0, 0); |
388 |
cvw.vdir[1] = cvw.vdir[2] = 0.; cvw.vdir[0] = 1.; |
389 |
setview(&cvw); beam_view(&cvw, 0, 0); |
390 |
cvw.vdir[1] = cvw.vdir[2] = 0.; cvw.vdir[0] = -1.; |
391 |
setview(&cvw); beam_view(&cvw, 0, 0); |
392 |
/* allocate new light set */ |
393 |
dl = (DLIGHTS *)calloc(1, sizeof(DLIGHTS)); |
394 |
if (dl == NULL) |
395 |
goto memerr; |
396 |
VCOPY(dl->lcent, ocent); |
397 |
/* push onto our light set list */ |
398 |
dl->next = dlightsets; |
399 |
dlightsets = dl; |
400 |
dobj_lightsamp = ssph_sample; /* get beams from server */ |
401 |
imm_mode = beam_sync(-1) > 0; |
402 |
while (imm_mode) |
403 |
if (serv_result() == DS_SHUTDOWN) |
404 |
quit(0); |
405 |
if (!ssph_compute()) { /* compute light sources from sphere */ |
406 |
dlightsets = dl->next; |
407 |
free((void *)dl); |
408 |
return(0); |
409 |
} |
410 |
op->ol = dl; |
411 |
return(1); |
412 |
memerr: |
413 |
error(SYSTEM, "out of memory in getdlights"); |
414 |
} |
415 |
|
416 |
|
417 |
static |
418 |
cmderror(cn, err) /* report command error */ |
419 |
int cn; |
420 |
char *err; |
421 |
{ |
422 |
sprintf(errmsg, "%s: %s", rhdcmd[cn], err); |
423 |
error(COMMAND, errmsg); |
424 |
} |
425 |
|
426 |
|
427 |
int |
428 |
dobj_command(cmd, args) /* run object display command */ |
429 |
char *cmd; |
430 |
register char *args; |
431 |
{ |
432 |
int somechange = 0; |
433 |
int cn, na, doxfm; |
434 |
register int nn; |
435 |
char *alist[MAXAC+1], *nm; |
436 |
/* find command */ |
437 |
for (cn = 0; cn < DO_NCMDS; cn++) |
438 |
if (!strcmp(cmd, rhdcmd[cn])) |
439 |
break; |
440 |
if (cn >= DO_NCMDS) |
441 |
return(-1); /* not in our list */ |
442 |
/* make argument list */ |
443 |
for (na = 0; *args; na++) { |
444 |
if (na > MAXAC) |
445 |
goto toomany; |
446 |
alist[na] = args; |
447 |
while (*args && !isspace(*args)) |
448 |
args++; |
449 |
while (isspace(*args)) |
450 |
*args++ = '\0'; |
451 |
} |
452 |
alist[na] = NULL; |
453 |
/* execute command */ |
454 |
switch (cn) { |
455 |
case DO_LOAD: /* load an octree */ |
456 |
if (na == 1) |
457 |
dobj_load(alist[0], alist[0]); |
458 |
else if (na == 2) |
459 |
dobj_load(alist[0], alist[1]); |
460 |
else { |
461 |
cmderror(cn, "need octree [name]"); |
462 |
return(0); |
463 |
} |
464 |
break; |
465 |
case DO_UNLOAD: /* clear an object */ |
466 |
if (na > 1) goto toomany; |
467 |
if (na && alist[0][0] == '*') |
468 |
somechange += dobj_cleanup(); |
469 |
else |
470 |
somechange += dobj_unload(na ? alist[0] : curname); |
471 |
break; |
472 |
case DO_XFORM: /* transform object */ |
473 |
case DO_MOVE: |
474 |
if (na && alist[0][0] != '-') { |
475 |
nm = alist[0]; nn = 1; |
476 |
} else { |
477 |
nm = curname; nn = 0; |
478 |
} |
479 |
if (cn == DO_MOVE && nn >= na) { |
480 |
cmderror(cn, "missing transform"); |
481 |
return(0); |
482 |
} |
483 |
somechange += dobj_xform(nm, cn==DO_MOVE, na-nn, alist+nn); |
484 |
break; |
485 |
case DO_UNMOVE: /* undo last transform */ |
486 |
somechange += dobj_unmove(); |
487 |
break; |
488 |
case DO_OBJECT: /* print object statistics */ |
489 |
if (dobj_putstats(na ? alist[0] : curname, sstdout)) |
490 |
if (na && alist[0][0] != '*' && (curobj == NULL || |
491 |
strcmp(alist[0], curobj->name))) |
492 |
savedxf(curobj = getdobj(alist[0])); |
493 |
break; |
494 |
case DO_DUP: /* duplicate object */ |
495 |
for (nn = 0; nn < na; nn++) |
496 |
if (alist[nn][0] == '-') |
497 |
break; |
498 |
switch (nn) { |
499 |
case 0: |
500 |
cmderror(cn, "need new object name"); |
501 |
return(0); |
502 |
case 1: |
503 |
nm = curname; |
504 |
break; |
505 |
case 2: |
506 |
nm = alist[0]; |
507 |
break; |
508 |
default: |
509 |
goto toomany; |
510 |
} |
511 |
if (!dobj_dup(nm, alist[nn-1])) |
512 |
break; |
513 |
if (na > nn) |
514 |
somechange += dobj_xform(curname, 1, na-nn, alist+nn); |
515 |
else |
516 |
curobj->drawcode = DO_HIDE; |
517 |
savedxf(curobj); |
518 |
break; |
519 |
case DO_SHOW: /* change rendering option */ |
520 |
case DO_LIGHT: |
521 |
case DO_HIDE: |
522 |
if (na > 1) goto toomany; |
523 |
dobj_lighting(na ? alist[0] : curname, cn); |
524 |
somechange++; |
525 |
break; |
526 |
default: |
527 |
error(CONSISTENCY, "bad command id in dobj_command"); |
528 |
} |
529 |
return(somechange); |
530 |
toomany: |
531 |
return(cmderror(cn, "too many arguments")); |
532 |
} |
533 |
|
534 |
|
535 |
dobj_load(oct, nam) /* create/load an octree object */ |
536 |
char *oct, *nam; |
537 |
{ |
538 |
extern char *getlibpath(), *getpath(); |
539 |
char *fpp, fpath[128]; |
540 |
register DOBJECT *op; |
541 |
/* check arguments */ |
542 |
if (oct == NULL) { |
543 |
error(COMMAND, "missing octree"); |
544 |
return(0); |
545 |
} |
546 |
if (nam == NULL) { |
547 |
error(COMMAND, "missing name"); |
548 |
return(0); |
549 |
} |
550 |
if (*nam == '*' | *nam == '-') { |
551 |
error(COMMAND, "illegal name"); |
552 |
return(0); |
553 |
} |
554 |
if (getdobj(nam) != NULL) { |
555 |
error(COMMAND, "name already taken (clear first)"); |
556 |
return(0); |
557 |
} |
558 |
/* get octree path */ |
559 |
if ((fpp = getpath(oct, getlibpath(), R_OK)) == NULL) { |
560 |
sprintf(errmsg, "cannot find octree \"%s\"", oct); |
561 |
error(COMMAND, errmsg); |
562 |
return(0); |
563 |
} |
564 |
strcpy(fpath, fpp); |
565 |
op = (DOBJECT *)malloc(sizeof(DOBJECT)); |
566 |
if (op == NULL) |
567 |
error(SYSTEM, "out of memory in dobj_load"); |
568 |
/* set struct fields */ |
569 |
strcpy(op->name, nam); |
570 |
op->ol = NULL; |
571 |
op->drawcode = DO_HIDE; |
572 |
setident4(op->xfb.f.xfm); op->xfb.f.sca = 1.; |
573 |
setident4(op->xfb.b.xfm); op->xfb.b.sca = 1.; |
574 |
op->xfav[op->xfac=0] = NULL; |
575 |
/* load octree into display list */ |
576 |
dolights = 0; |
577 |
domats = 1; |
578 |
op->listid = rgl_octlist(fpath, op->center, &op->radius, &op->nlists); |
579 |
/* start rtrace */ |
580 |
rtargv[RTARGC-1] = fpath; |
581 |
rtargv[RTARGC] = NULL; |
582 |
open_process(op->rtp, rtargv); |
583 |
/* insert into main list */ |
584 |
op->next = dobjects; |
585 |
curobj = dobjects = op; |
586 |
savedxf(NULL); |
587 |
return(1); |
588 |
} |
589 |
|
590 |
|
591 |
dobj_unload(nam) /* free the named object */ |
592 |
char *nam; |
593 |
{ |
594 |
register DOBJECT *op; |
595 |
|
596 |
if ((op = getdobj(nam)) == NULL) { |
597 |
error(COMMAND, "no object"); |
598 |
return(0); |
599 |
} |
600 |
freedobj(op); |
601 |
savedxf(curobj = NULL); |
602 |
return(1); |
603 |
} |
604 |
|
605 |
|
606 |
dobj_cleanup() /* free all resources */ |
607 |
{ |
608 |
register DLIGHTS *lp; |
609 |
|
610 |
while (dobjects != NULL) |
611 |
freedobj(dobjects); |
612 |
savedxf(curobj = NULL); |
613 |
while ((lp = dlightsets) != NULL) { |
614 |
dlightsets = lp->next; |
615 |
free((void *)lp); |
616 |
} |
617 |
return(1); |
618 |
} |
619 |
|
620 |
|
621 |
dobj_xform(nam, rel, ac, av) /* set/add transform for nam */ |
622 |
char *nam; |
623 |
int rel, ac; |
624 |
char **av; |
625 |
{ |
626 |
register DOBJECT *op; |
627 |
FVECT cent; |
628 |
double rad; |
629 |
char scoord[16]; |
630 |
int i; |
631 |
|
632 |
if ((op = getdobj(nam)) == NULL) { |
633 |
error(COMMAND, "no object"); |
634 |
return(0); |
635 |
} |
636 |
if (rel) |
637 |
rel = op->xfac + 8; |
638 |
if (ac + rel > MAXAC) { |
639 |
error(COMMAND, "too many transform arguments"); |
640 |
return(0); |
641 |
} |
642 |
savedxf(curobj = op); /* remember current transform */ |
643 |
if (rel && ac == 4 && !strcmp(av[0], "-t")) |
644 |
rel = -1; /* don't move for translate */ |
645 |
else { |
646 |
getdcent(cent, op); /* don't move if near orig. */ |
647 |
rad = getdrad(op); |
648 |
if (DOT(cent,cent) < rad*rad) |
649 |
rel = -1; |
650 |
} |
651 |
if (!rel) { /* remove old transform */ |
652 |
while (op->xfac) |
653 |
freestr(op->xfav[--op->xfac]); |
654 |
} else if (rel > 0) { /* relative move */ |
655 |
op->xfav[op->xfac++] = savestr("-t"); |
656 |
for (i = 0; i < 3; i++) { |
657 |
sprintf(scoord, "%.4e", -cent[i]); |
658 |
op->xfav[op->xfac++] = savestr(scoord); |
659 |
} |
660 |
} |
661 |
while (ac--) |
662 |
op->xfav[op->xfac++] = savestr(*av++); |
663 |
if (rel > 0) { /* move back */ |
664 |
op->xfav[op->xfac++] = savestr("-t"); |
665 |
for (i = 0; i < 3; i++) { |
666 |
sprintf(scoord, "%.4e", cent[i]); |
667 |
op->xfav[op->xfac++] = savestr(scoord); |
668 |
} |
669 |
} |
670 |
op->xfav[op->xfac] = NULL; |
671 |
if (fullxf(&op->xfb, op->xfac, op->xfav) != op->xfac) { |
672 |
error(COMMAND, "bad transform arguments"); |
673 |
dobj_unmove(); |
674 |
savedxf(op); /* save current transform instead */ |
675 |
return(0); |
676 |
} |
677 |
/* don't know local lights anymore */ |
678 |
getdlights(op, 0); |
679 |
return(1); |
680 |
} |
681 |
|
682 |
|
683 |
dobj_putstats(nam, fp) /* put out statistics for nam */ |
684 |
char *nam; |
685 |
FILE *fp; |
686 |
{ |
687 |
FVECT ocent; |
688 |
register DOBJECT *op; |
689 |
register int i; |
690 |
|
691 |
if (nam == NULL) { |
692 |
error(COMMAND, "no current object"); |
693 |
return(0); |
694 |
} |
695 |
if (nam[0] == '*') { |
696 |
i = 0; |
697 |
for (op = dobjects; op != NULL; op = op->next) |
698 |
i += dobj_putstats(op->name, fp); |
699 |
return(i); |
700 |
} |
701 |
if ((op = getdobj(nam)) == NULL) { |
702 |
error(COMMAND, "unknown object"); |
703 |
return(0); |
704 |
} |
705 |
getdcent(ocent, op); |
706 |
fprintf(fp, "%s: %s, center [%g %g %g], radius %g", op->name, |
707 |
op->drawcode==DO_HIDE ? "hidden" : |
708 |
op->drawcode==DO_LIGHT && op->ol!=NULL ? "lighted" : |
709 |
"shown", |
710 |
ocent[0],ocent[1],ocent[2], getdrad(op)); |
711 |
if (op->xfac) |
712 |
fputs(", (xform", fp); |
713 |
for (i = 0; i < op->xfac; i++) { |
714 |
putc(' ', fp); |
715 |
fputs(op->xfav[i], fp); |
716 |
} |
717 |
if (op->xfac) |
718 |
fputc(')', fp); |
719 |
fputc('\n', fp); |
720 |
return(1); |
721 |
} |
722 |
|
723 |
|
724 |
dobj_unmove() /* undo last transform change */ |
725 |
{ |
726 |
int txfac; |
727 |
char *txfav[MAXAC+1]; |
728 |
|
729 |
if (curobj == NULL) { |
730 |
error(COMMAND, "no current object"); |
731 |
return(0); |
732 |
} |
733 |
/* hold last transform */ |
734 |
bcopy((char *)lastxfav, (char *)txfav, |
735 |
(txfac=lastxfac)*sizeof(char *)); |
736 |
/* save this transform */ |
737 |
bcopy((char *)curobj->xfav, (char *)lastxfav, |
738 |
(lastxfac=curobj->xfac)*sizeof(char *)); |
739 |
/* copy back last transform */ |
740 |
bcopy((char *)txfav, (char *)curobj->xfav, |
741 |
(curobj->xfac=txfac)*sizeof(char *)); |
742 |
/* set matrices */ |
743 |
fullxf(&curobj->xfb, curobj->xfac, curobj->xfav); |
744 |
/* don't know local lights anymore */ |
745 |
getdlights(curobj, 0); |
746 |
return(1); |
747 |
} |
748 |
|
749 |
|
750 |
dobj_dup(oldnm, nam) /* duplicate object oldnm as nam */ |
751 |
char *oldnm, *nam; |
752 |
{ |
753 |
register DOBJECT *op, *opdup; |
754 |
/* check arguments */ |
755 |
if ((op = getdobj(oldnm)) == NULL) { |
756 |
error(COMMAND, "no object"); |
757 |
return(0); |
758 |
} |
759 |
if (nam == NULL) { |
760 |
error(COMMAND, "missing name"); |
761 |
return(0); |
762 |
} |
763 |
if (*nam == '*' | *nam == '-') { |
764 |
error(COMMAND, "illegal name"); |
765 |
return(0); |
766 |
} |
767 |
if (getdobj(nam) != NULL) { |
768 |
error(COMMAND, "name already taken (clear first)"); |
769 |
return(0); |
770 |
} |
771 |
/* allocate and copy struct */ |
772 |
opdup = (DOBJECT *)malloc(sizeof(DOBJECT)); |
773 |
if (opdup == NULL) |
774 |
error(SYSTEM, "out of memory in dobj_dup"); |
775 |
copystruct(opdup, op); |
776 |
/* rename */ |
777 |
strcpy(opdup->name, nam); |
778 |
/* get our own copy of transform */ |
779 |
for (opdup->xfac = 0; opdup->xfac < op->xfac; opdup->xfac++) |
780 |
opdup->xfav[opdup->xfac] = savestr(op->xfav[opdup->xfac]); |
781 |
opdup->xfav[opdup->xfac] = NULL; |
782 |
/* insert it into our list */ |
783 |
opdup->next = dobjects; |
784 |
curobj = dobjects = opdup; |
785 |
return(1); |
786 |
} |
787 |
|
788 |
|
789 |
dobj_lighting(nam, cn) /* set up lighting for display object */ |
790 |
char *nam; |
791 |
int cn; |
792 |
{ |
793 |
int i, res[2]; |
794 |
VIEW *dv; |
795 |
register DOBJECT *op; |
796 |
|
797 |
if (nam == NULL) { |
798 |
error(COMMAND, "no current object"); |
799 |
return(0); |
800 |
} |
801 |
if (nam[0] == '*') { |
802 |
for (op = dobjects; op != NULL; op = op->next) |
803 |
if ((op->drawcode = cn) == DO_LIGHT) |
804 |
getdlights(op, 1); |
805 |
else |
806 |
op->ol = NULL; |
807 |
} else if ((op = getdobj(nam)) == NULL) { |
808 |
error(COMMAND, "unknown object"); |
809 |
return(0); |
810 |
} else if ((op->drawcode = cn) == DO_LIGHT) { |
811 |
if (!getdlights(op, 1)) |
812 |
error(COMMAND, "insufficient samples to light object"); |
813 |
} else |
814 |
op->ol = NULL; |
815 |
|
816 |
if (dobj_lightsamp != NULL) { /* restore beam set */ |
817 |
dobj_lightsamp = NULL; |
818 |
beam_init(1); |
819 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
820 |
beam_view(dv, res[0], res[1]); |
821 |
beam_sync(1); /* update server */ |
822 |
} |
823 |
} |
824 |
|
825 |
|
826 |
double |
827 |
dobj_trace(nm, rorg, rdir) /* check for ray intersection with object(s) */ |
828 |
char nm[]; |
829 |
FVECT rorg, rdir; |
830 |
{ |
831 |
register DOBJECT *op; |
832 |
FVECT xorg, xdir; |
833 |
double darr[6]; |
834 |
/* check each visible object? */ |
835 |
if (nm == NULL || *nm == '*') { |
836 |
double dist, mindist = 1.01*FHUGE; |
837 |
|
838 |
if (nm != NULL) nm[0] = '\0'; |
839 |
for (op = dobjects; op != NULL; op = op->next) { |
840 |
if (op->drawcode == DO_HIDE) |
841 |
continue; |
842 |
dist = dobj_trace(op->name, rorg, rdir); |
843 |
if (dist < mindist) { |
844 |
if (nm != NULL) strcpy(nm, op->name); |
845 |
mindist = dist; |
846 |
} |
847 |
} |
848 |
return(mindist); |
849 |
} |
850 |
/* else check particular object */ |
851 |
if ((op = getdobj(nm)) == NULL) { |
852 |
error(COMMAND, "unknown object"); |
853 |
return(FHUGE); |
854 |
} |
855 |
if (op->xfac) { /* put ray in local coordinates */ |
856 |
multp3(xorg, rorg, op->xfb.b.xfm); |
857 |
multv3(xdir, rdir, op->xfb.b.xfm); |
858 |
VCOPY(darr, xorg); VCOPY(darr+3, xdir); |
859 |
} else { |
860 |
VCOPY(darr, rorg); VCOPY(darr+3, rdir); |
861 |
} |
862 |
/* trace it */ |
863 |
if (process(op->rtp, (char *)darr, (char *)darr, sizeof(double), |
864 |
6*sizeof(double)) != sizeof(double)) |
865 |
error(SYSTEM, "rtrace communication error"); |
866 |
/* return distance */ |
867 |
if (darr[0] >= .99*FHUGE) |
868 |
return(FHUGE); |
869 |
return(darr[0]*op->xfb.f.sca); |
870 |
} |
871 |
|
872 |
|
873 |
int |
874 |
dobj_render() /* render our objects in OpenGL */ |
875 |
{ |
876 |
int nrendered = 0; |
877 |
GLboolean normalizing; |
878 |
GLfloat vec[4]; |
879 |
FVECT v1; |
880 |
register DOBJECT *op; |
881 |
register int i; |
882 |
/* anything to render? */ |
883 |
for (op = dobjects; op != NULL; op = op->next) |
884 |
if (op->drawcode != DO_HIDE) |
885 |
break; |
886 |
if (op == NULL) |
887 |
return(0); |
888 |
/* set up general rendering params */ |
889 |
glGetBooleanv(GL_NORMALIZE, &normalizing); |
890 |
glPushAttrib(GL_LIGHTING_BIT|GL_TRANSFORM_BIT|GL_ENABLE_BIT| |
891 |
GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_POLYGON_BIT); |
892 |
glDepthFunc(GL_LESS); |
893 |
glEnable(GL_DEPTH_TEST); |
894 |
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
895 |
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
896 |
glShadeModel(GL_SMOOTH); |
897 |
glFrontFace(GL_CCW); |
898 |
glDisable(GL_CULL_FACE); |
899 |
for (i = MAXLIGHTS; i--; ) |
900 |
glDisable(glightid[i]); |
901 |
glEnable(GL_LIGHTING); |
902 |
rgl_checkerr("setting rendering modes in dobj_render"); |
903 |
/* render each object */ |
904 |
for (op = dobjects; op != NULL; op = op->next) { |
905 |
if (op->drawcode == DO_HIDE) |
906 |
continue; |
907 |
/* set up lighting */ |
908 |
if (op->drawcode == DO_LIGHT && op->ol != NULL) { |
909 |
BYTE pval; |
910 |
double expval, d; |
911 |
/* use computed sources */ |
912 |
if (tmMapPixels(&pval, &op->ol->larb, TM_NOCHROM, 1) |
913 |
!= TM_E_OK) |
914 |
error(CONSISTENCY, "dobj_render w/o tone map"); |
915 |
expval = pval * (WHTEFFICACY/256.) / |
916 |
tmLuminance(op->ol->larb); |
917 |
vec[0] = expval * colval(op->ol->lamb,RED); |
918 |
vec[1] = expval * colval(op->ol->lamb,GRN); |
919 |
vec[2] = expval * colval(op->ol->lamb,BLU); |
920 |
vec[3] = 1.; |
921 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
922 |
for (i = op->ol->nl; i--; ) { |
923 |
VCOPY(vec, op->ol->li[i].direc); |
924 |
vec[3] = 0.; |
925 |
glLightfv(glightid[i], GL_POSITION, vec); |
926 |
d = expval * op->ol->li[i].omega; |
927 |
vec[0] = d * colval(op->ol->li[i].val,RED); |
928 |
vec[1] = d * colval(op->ol->li[i].val,GRN); |
929 |
vec[2] = d * colval(op->ol->li[i].val,BLU); |
930 |
vec[3] = 1.; |
931 |
glLightfv(glightid[i], GL_SPECULAR, vec); |
932 |
glLightfv(glightid[i], GL_DIFFUSE, vec); |
933 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
934 |
glLightfv(glightid[i], GL_AMBIENT, vec); |
935 |
glEnable(glightid[i]); |
936 |
} |
937 |
} else { /* fake lighting */ |
938 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
939 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
940 |
getdcent(v1, op); |
941 |
VSUB(v1, odev.v.vp, v1); |
942 |
if (normalize(v1) <= getdrad(op)) { |
943 |
vec[0] = -odev.v.vdir[0]; |
944 |
vec[1] = -odev.v.vdir[1]; |
945 |
vec[2] = -odev.v.vdir[2]; |
946 |
} else |
947 |
VCOPY(vec, v1); |
948 |
vec[3] = 0.; |
949 |
glLightfv(GL_LIGHT0, GL_POSITION, vec); |
950 |
vec[0] = vec[1] = vec[2] = .7; vec[3] = 1.; |
951 |
glLightfv(GL_LIGHT0, GL_SPECULAR, vec); |
952 |
glLightfv(GL_LIGHT0, GL_DIFFUSE, vec); |
953 |
vec[0] = vec[1] = vec[2] = .3; vec[3] = 1.; |
954 |
glLightfv(GL_LIGHT0, GL_AMBIENT, vec); |
955 |
glEnable(GL_LIGHT0); |
956 |
} |
957 |
/* set up object transform */ |
958 |
if (op->xfac) { |
959 |
if (!normalizing && op->xfb.f.sca < 1.-FTINY | |
960 |
op->xfb.f.sca > 1.+FTINY) |
961 |
glEnable(GL_NORMALIZE); |
962 |
glMatrixMode(GL_MODELVIEW); |
963 |
glPushMatrix(); |
964 |
/* matrix order works out to same */ |
965 |
#ifdef SMLFLT |
966 |
glMultMatrixf((GLfloat *)op->xfb.f.xfm); |
967 |
#else |
968 |
glMultMatrixd((GLdouble *)op->xfb.f.xfm); |
969 |
#endif |
970 |
} |
971 |
/* render the display list */ |
972 |
glCallList(op->listid); |
973 |
nrendered++; |
974 |
/* restore matrix */ |
975 |
if (op->xfac) { |
976 |
glMatrixMode(GL_MODELVIEW); |
977 |
glPopMatrix(); |
978 |
if (!normalizing) |
979 |
glDisable(GL_NORMALIZE); |
980 |
} |
981 |
/* restore lighting */ |
982 |
if (op->drawcode == DO_LIGHT && op->ol != NULL) |
983 |
for (i = op->ol->nl; i--; ) |
984 |
glDisable(glightid[i]); |
985 |
else |
986 |
glDisable(GL_LIGHT0); |
987 |
/* check errors */ |
988 |
} |
989 |
glPopAttrib(); /* restore rendering params */ |
990 |
rgl_checkerr("rendering objects in dobj_render"); |
991 |
return(nrendered); |
992 |
} |