1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rhdobj.c,v 3.14 2003/06/30 14:59:11 schorsch Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Routines for loading and displaying Radiance objects in rholo with GLX. |
6 |
*/ |
7 |
|
8 |
#include <string.h> |
9 |
|
10 |
#include "radogl.h" |
11 |
#include "tonemap.h" |
12 |
#include "rhdisp.h" |
13 |
#include "rhdriver.h" |
14 |
#include "rhdobj.h" |
15 |
#include "rtprocess.h" |
16 |
|
17 |
extern FILE *sstdout; /* user standard output */ |
18 |
|
19 |
char rhdcmd[DO_NCMDS][8] = DO_INIT; /* user command list */ |
20 |
|
21 |
int (*dobj_lightsamp)() = NULL; /* pointer to function to get lights */ |
22 |
|
23 |
#define AVGREFL 0.5 /* assumed average reflectance */ |
24 |
|
25 |
#define MAXAC 512 /* maximum number of args */ |
26 |
|
27 |
#ifndef MINTHRESH |
28 |
#define MINTHRESH 5.0 /* source threshold w.r.t. mean */ |
29 |
#endif |
30 |
|
31 |
#ifndef NALT |
32 |
#define NALT 11 /* # sampling altitude angles */ |
33 |
#endif |
34 |
#ifndef NAZI |
35 |
#define NAZI ((int)(PI/2.*NALT+.5)) |
36 |
#endif |
37 |
|
38 |
typedef struct dlights { |
39 |
struct dlights *next; /* next in lighting set list */ |
40 |
FVECT lcent; /* computed lighting center */ |
41 |
double ravg; /* harmonic mean free range radius */ |
42 |
TMbright larb; /* average reflected brightness */ |
43 |
COLOR lamb; /* local ambient value */ |
44 |
short nl; /* number of lights in this set */ |
45 |
struct lsource { |
46 |
FVECT direc; /* source direction */ |
47 |
double omega; /* source solid angle */ |
48 |
COLOR val; /* source color */ |
49 |
} li[MAXLIGHTS]; /* light sources */ |
50 |
} DLIGHTS; /* a light source set */ |
51 |
|
52 |
typedef struct dobject { |
53 |
struct dobject *next; /* next object in list */ |
54 |
char name[64]; /* object name */ |
55 |
FVECT center; /* orig. object center */ |
56 |
RREAL radius; /* orig. object radius */ |
57 |
int listid; /* GL display list identifier */ |
58 |
int nlists; /* number of lists allocated */ |
59 |
SUBPROC rtp; /* associated rtrace process */ |
60 |
DLIGHTS *ol; /* object lights */ |
61 |
FULLXF xfb; /* coordinate transform */ |
62 |
short drawcode; /* drawing code */ |
63 |
short xfac; /* transform argument count */ |
64 |
char *xfav[MAXAC+1]; /* transform args */ |
65 |
} DOBJECT; /* a displayable object */ |
66 |
|
67 |
static DLIGHTS *dlightsets; /* lighting sets */ |
68 |
static DOBJECT *dobjects; /* display object list */ |
69 |
static DOBJECT *curobj; /* current (last referred) object */ |
70 |
static int lastxfac; /* last number of transform args */ |
71 |
static char *lastxfav[MAXAC+1]; /* saved transform arguments */ |
72 |
|
73 |
#define getdcent(c,op) multp3(c,(op)->center,(op)->xfb.f.xfm) |
74 |
#define getdrad(op) ((op)->radius*(op)->xfb.f.sca) |
75 |
|
76 |
#define RTARGC 8 |
77 |
static char *rtargv[RTARGC+1] = {"rtrace", "-h-", "-w-", "-fdd", |
78 |
"-x", "1", "-oL"}; |
79 |
|
80 |
static struct { |
81 |
int nsamp; /* number of ray samples */ |
82 |
COLOR val; /* value (sum) */ |
83 |
} ssamp[NALT][NAZI]; /* current sphere samples */ |
84 |
|
85 |
#define curname (curobj==NULL ? (char *)NULL : curobj->name) |
86 |
|
87 |
|
88 |
static DOBJECT * |
89 |
getdobj(nm) /* get object from list by name */ |
90 |
char *nm; |
91 |
{ |
92 |
register DOBJECT *op; |
93 |
|
94 |
if (nm == NULL) |
95 |
return(NULL); |
96 |
if (nm == curname) |
97 |
return(curobj); |
98 |
for (op = dobjects; op != NULL; op = op->next) |
99 |
if (!strcmp(op->name, nm)) |
100 |
break; |
101 |
return(op); |
102 |
} |
103 |
|
104 |
|
105 |
static |
106 |
freedobj(op) /* free resources and memory assoc. with op */ |
107 |
register DOBJECT *op; |
108 |
{ |
109 |
int foundlink = 0; |
110 |
DOBJECT ohead; |
111 |
register DOBJECT *opl; |
112 |
|
113 |
if (op == NULL) |
114 |
return(0); |
115 |
ohead.next = dobjects; |
116 |
for (opl = &ohead; opl->next != NULL; opl = opl->next) { |
117 |
if (opl->next == op && (opl->next = op->next) == NULL) |
118 |
break; |
119 |
foundlink += opl->next->listid == op->listid; |
120 |
} |
121 |
dobjects = ohead.next; |
122 |
if (!foundlink) { |
123 |
glDeleteLists(op->listid, op->nlists); |
124 |
close_process(&(op->rtp)); |
125 |
} |
126 |
while (op->xfac) |
127 |
freestr(op->xfav[--op->xfac]); |
128 |
free((void *)op); |
129 |
return(1); |
130 |
} |
131 |
|
132 |
|
133 |
static |
134 |
savedxf(op) /* save transform for display object */ |
135 |
register DOBJECT *op; |
136 |
{ |
137 |
/* free old */ |
138 |
while (lastxfac) |
139 |
freestr(lastxfav[--lastxfac]); |
140 |
/* nothing to save? */ |
141 |
if (op == NULL) { |
142 |
lastxfav[0] = NULL; |
143 |
return(0); |
144 |
} |
145 |
/* else save new */ |
146 |
for (lastxfac = 0; lastxfac < op->xfac; lastxfac++) |
147 |
lastxfav[lastxfac] = savestr(op->xfav[lastxfac]); |
148 |
lastxfav[lastxfac] = NULL; |
149 |
return(1); |
150 |
} |
151 |
|
152 |
|
153 |
static |
154 |
ssph_sample(clr, direc, pos) /* add sample to current source sphere */ |
155 |
COLR clr; |
156 |
FVECT direc, pos; |
157 |
{ |
158 |
COLOR col; |
159 |
double d; |
160 |
register int alt, azi; |
161 |
|
162 |
if (dlightsets == NULL) |
163 |
return; |
164 |
if (pos == NULL) |
165 |
d = FHUGE; /* sample is at infinity */ |
166 |
else if ((d = (pos[0] - dlightsets->lcent[0])*direc[0] + |
167 |
(pos[1] - dlightsets->lcent[1])*direc[1] + |
168 |
(pos[2] - dlightsets->lcent[2])*direc[2]) > FTINY) |
169 |
dlightsets->ravg += 1./d; |
170 |
else |
171 |
return; /* sample is behind us */ |
172 |
alt = NALT*(1.-FTINY)*(.5*(1.+FTINY) + direc[2]*.5); |
173 |
azi = NAZI*(1.-FTINY)*(.5*(1.+FTINY) + .5/PI*atan2(direc[1],direc[0])); |
174 |
colr_color(col, clr); |
175 |
addcolor(ssamp[alt][azi].val, col); |
176 |
ssamp[alt][azi].nsamp++; |
177 |
} |
178 |
|
179 |
|
180 |
static |
181 |
ssph_direc(direc, alt, azi) /* compute sphere sampling direction */ |
182 |
FVECT direc; |
183 |
int alt, azi; |
184 |
{ |
185 |
double phi, d; |
186 |
|
187 |
direc[2] = 2./NALT*(alt+.5) - 1.; |
188 |
d = sqrt(1. - direc[2]*direc[2]); |
189 |
phi = 2.*PI/NAZI*(azi+.5) - PI; |
190 |
direc[0] = d*cos(phi); |
191 |
direc[1] = d*sin(phi); |
192 |
} |
193 |
|
194 |
|
195 |
static int |
196 |
ssph_neigh(sp, next) /* neighbor counter on sphere */ |
197 |
register int sp[2]; |
198 |
int next; |
199 |
{ |
200 |
static short nneigh = 0; /* neighbor count */ |
201 |
static short neighlist[NAZI+6][2]; /* neighbor list (0 is home) */ |
202 |
register int i; |
203 |
|
204 |
if (next) { |
205 |
if (nneigh <= 0) |
206 |
return(0); |
207 |
sp[0] = neighlist[--nneigh][0]; |
208 |
sp[1] = neighlist[nneigh][1]; |
209 |
return(1); |
210 |
} |
211 |
if (sp[0] < 0 | sp[0] >= NALT | sp[1] < 0 | sp[1] >= NAZI) |
212 |
return(nneigh=0); |
213 |
neighlist[0][0] = sp[0]; neighlist[0][1] = sp[1]; |
214 |
nneigh = 1; |
215 |
if (sp[0] == 0) { |
216 |
neighlist[nneigh][0] = 1; |
217 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
218 |
neighlist[nneigh][0] = 1; |
219 |
neighlist[nneigh++][1] = sp[1]; |
220 |
neighlist[nneigh][0] = 1; |
221 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
222 |
for (i = 0; i < NAZI; i++) |
223 |
if (i != sp[1]) { |
224 |
neighlist[nneigh][0] = 0; |
225 |
neighlist[nneigh++][1] = i; |
226 |
} |
227 |
} else if (sp[0] == NALT-1) { |
228 |
neighlist[nneigh][0] = NALT-2; |
229 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
230 |
neighlist[nneigh][0] = NALT-2; |
231 |
neighlist[nneigh++][1] = sp[1]; |
232 |
neighlist[nneigh][0] = NALT-2; |
233 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
234 |
for (i = 0; i < NAZI; i++) |
235 |
if (i != sp[1]) { |
236 |
neighlist[nneigh][0] = NALT-1; |
237 |
neighlist[nneigh++][1] = i; |
238 |
} |
239 |
} else { |
240 |
neighlist[nneigh][0] = sp[0]-1; |
241 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
242 |
neighlist[nneigh][0] = sp[0]-1; |
243 |
neighlist[nneigh++][1] = sp[1]; |
244 |
neighlist[nneigh][0] = sp[0]-1; |
245 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
246 |
neighlist[nneigh][0] = sp[0]; |
247 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
248 |
neighlist[nneigh][0] = sp[0]; |
249 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
250 |
neighlist[nneigh][0] = sp[0]+1; |
251 |
neighlist[nneigh++][1] = (sp[1]+1)%NAZI; |
252 |
neighlist[nneigh][0] = sp[0]+1; |
253 |
neighlist[nneigh++][1] = sp[1]; |
254 |
neighlist[nneigh][0] = sp[0]+1; |
255 |
neighlist[nneigh++][1] = (sp[1]+(NAZI-1))%NAZI; |
256 |
} |
257 |
return(nneigh); |
258 |
} |
259 |
|
260 |
|
261 |
static |
262 |
ssph_compute() /* compute source set from sphere samples */ |
263 |
{ |
264 |
int ncells, nsamps; |
265 |
COLOR csum; |
266 |
FVECT v; |
267 |
double d, thresh, maxbr; |
268 |
int maxalt, maxazi, spos[2]; |
269 |
register int alt, azi; |
270 |
register struct lsource *ls; |
271 |
/* count & average sampled cells */ |
272 |
setcolor(csum, 0., 0., 0.); |
273 |
ncells = nsamps = 0; |
274 |
for (alt = 0; alt < NALT; alt++) |
275 |
for (azi = 0; azi < NAZI; azi++) |
276 |
if (ssamp[alt][azi].nsamp) { |
277 |
if (ssamp[alt][azi].nsamp > 1) { |
278 |
d = 1.0/ssamp[alt][azi].nsamp; |
279 |
scalecolor(ssamp[alt][azi].val, d); |
280 |
} |
281 |
addcolor(csum, ssamp[alt][azi].val); |
282 |
nsamps += ssamp[alt][azi].nsamp; |
283 |
ncells++; |
284 |
} |
285 |
if (dlightsets == NULL | ncells < NALT*NAZI/4) { |
286 |
ncells = 0; |
287 |
goto done; |
288 |
} |
289 |
/* harmonic mean distance */ |
290 |
if (dlightsets->ravg > FTINY) |
291 |
dlightsets->ravg = nsamps / dlightsets->ravg; |
292 |
else |
293 |
dlightsets->ravg = FHUGE; |
294 |
/* light source threshold */ |
295 |
thresh = MINTHRESH*bright(csum)/ncells; |
296 |
if (thresh <= FTINY) { |
297 |
ncells = 0; |
298 |
goto done; |
299 |
} |
300 |
/* avg. reflected brightness */ |
301 |
d = AVGREFL / (double)ncells; |
302 |
scalecolor(csum, d); |
303 |
if (tmCvColors(&dlightsets->larb, TM_NOCHROM, &csum, 1) != TM_E_OK) |
304 |
error(CONSISTENCY, "tone mapping problem in ssph_compute"); |
305 |
/* greedy light source clustering */ |
306 |
while (dlightsets->nl < MAXLIGHTS) { |
307 |
maxbr = 0.; /* find brightest cell */ |
308 |
for (alt = 0; alt < NALT; alt++) |
309 |
for (azi = 0; azi < NAZI; azi++) |
310 |
if ((d = bright(ssamp[alt][azi].val)) > maxbr) { |
311 |
maxalt = alt; maxazi = azi; |
312 |
maxbr = d; |
313 |
} |
314 |
if (maxbr < thresh) /* below threshold? */ |
315 |
break; |
316 |
ls = dlightsets->li + dlightsets->nl++; |
317 |
spos[0] = maxalt; spos[1] = maxazi; /* cluster */ |
318 |
for (ssph_neigh(spos, 0); ssph_neigh(spos, 1); ) { |
319 |
alt = spos[0]; azi = spos[1]; |
320 |
if ((d = bright(ssamp[alt][azi].val)) < .75*thresh) |
321 |
continue; /* too dim */ |
322 |
ssph_direc(v, alt, azi); /* else add it in */ |
323 |
VSUM(ls->direc, ls->direc, v, d); |
324 |
ls->omega += 1.; |
325 |
addcolor(ls->val, ssamp[alt][azi].val); |
326 |
/* remove from list */ |
327 |
setcolor(ssamp[alt][azi].val, 0., 0., 0.); |
328 |
ssamp[alt][azi].nsamp = 0; |
329 |
} |
330 |
d = 1./ls->omega; /* avg. brightness */ |
331 |
scalecolor(ls->val, d); |
332 |
ls->omega *= 4.*PI/(NALT*NAZI); /* solid angle */ |
333 |
normalize(ls->direc); /* direction */ |
334 |
} |
335 |
/* compute ambient remainder */ |
336 |
for (alt = 0; alt < NALT; alt++) |
337 |
for (azi = 0; azi < NAZI; azi++) |
338 |
if (ssamp[alt][azi].nsamp) |
339 |
addcolor(dlightsets->lamb, ssamp[alt][azi].val); |
340 |
d = 1.0/ncells; |
341 |
scalecolor(dlightsets->lamb, d); |
342 |
done: /* clear sphere sample array */ |
343 |
memset((void *)ssamp, '\0', sizeof(ssamp)); |
344 |
return(ncells); |
345 |
} |
346 |
|
347 |
|
348 |
static |
349 |
getdlights(op, force) /* get lights for display object */ |
350 |
register DOBJECT *op; |
351 |
int force; |
352 |
{ |
353 |
double d2, mind2 = FHUGE*FHUGE; |
354 |
FVECT ocent; |
355 |
VIEW cvw; |
356 |
register DLIGHTS *dl; |
357 |
|
358 |
op->ol = NULL; |
359 |
if (op->drawcode != DO_LIGHT) |
360 |
return(0); |
361 |
/* check for usable light set */ |
362 |
getdcent(ocent, op); |
363 |
for (dl = dlightsets; dl != NULL; dl = dl->next) |
364 |
if ((d2 = dist2(dl->lcent, ocent)) < mind2) { |
365 |
op->ol = dl; |
366 |
mind2 = d2; |
367 |
} |
368 |
/* the following is heuristic */ |
369 |
d2 = 2.*getdrad(op); d2 *= d2; |
370 |
if ((dl = op->ol) != NULL && (mind2 < 0.0625*dl->ravg*dl->ravg || |
371 |
mind2 < 4.*getdrad(op)*getdrad(op))) |
372 |
return(1); |
373 |
if (!force) |
374 |
return(0); |
375 |
/* need to compute new light set */ |
376 |
cvw = stdview; |
377 |
cvw.type = VT_PER; |
378 |
VCOPY(cvw.vp, ocent); |
379 |
cvw.vup[0] = 1.; cvw.vup[1] = cvw.vup[2] = 0.; |
380 |
cvw.horiz = 90; cvw.vert = 90.; |
381 |
beam_init(1); /* query beams through center */ |
382 |
cvw.vdir[0] = cvw.vdir[1] = 0.; cvw.vdir[2] = 1.; |
383 |
setview(&cvw); beam_view(&cvw, 0, 0); |
384 |
cvw.vdir[0] = cvw.vdir[1] = 0.; cvw.vdir[2] = -1.; |
385 |
setview(&cvw); beam_view(&cvw, 0, 0); |
386 |
cvw.vup[0] = cvw.vup[1] = 0.; cvw.vup[2] = 1.; |
387 |
cvw.vdir[0] = cvw.vdir[2] = 0.; cvw.vdir[1] = 1.; |
388 |
setview(&cvw); beam_view(&cvw, 0, 0); |
389 |
cvw.vdir[0] = cvw.vdir[2] = 0.; cvw.vdir[1] = -1.; |
390 |
setview(&cvw); beam_view(&cvw, 0, 0); |
391 |
cvw.vdir[1] = cvw.vdir[2] = 0.; cvw.vdir[0] = 1.; |
392 |
setview(&cvw); beam_view(&cvw, 0, 0); |
393 |
cvw.vdir[1] = cvw.vdir[2] = 0.; cvw.vdir[0] = -1.; |
394 |
setview(&cvw); beam_view(&cvw, 0, 0); |
395 |
/* allocate new light set */ |
396 |
dl = (DLIGHTS *)calloc(1, sizeof(DLIGHTS)); |
397 |
if (dl == NULL) |
398 |
goto memerr; |
399 |
VCOPY(dl->lcent, ocent); |
400 |
/* push onto our light set list */ |
401 |
dl->next = dlightsets; |
402 |
dlightsets = dl; |
403 |
dobj_lightsamp = ssph_sample; /* get beams from server */ |
404 |
imm_mode = beam_sync(-1) > 0; |
405 |
while (imm_mode) |
406 |
if (serv_result() == DS_SHUTDOWN) |
407 |
quit(0); |
408 |
if (!ssph_compute()) { /* compute light sources from sphere */ |
409 |
dlightsets = dl->next; |
410 |
free((void *)dl); |
411 |
return(0); |
412 |
} |
413 |
op->ol = dl; |
414 |
return(1); |
415 |
memerr: |
416 |
error(SYSTEM, "out of memory in getdlights"); |
417 |
} |
418 |
|
419 |
|
420 |
static |
421 |
cmderror(cn, err) /* report command error */ |
422 |
int cn; |
423 |
char *err; |
424 |
{ |
425 |
sprintf(errmsg, "%s: %s", rhdcmd[cn], err); |
426 |
error(COMMAND, errmsg); |
427 |
} |
428 |
|
429 |
|
430 |
int |
431 |
dobj_command(cmd, args) /* run object display command */ |
432 |
char *cmd; |
433 |
register char *args; |
434 |
{ |
435 |
int somechange = 0; |
436 |
int cn, na, doxfm; |
437 |
register int nn; |
438 |
char *alist[MAXAC+1], *nm; |
439 |
/* find command */ |
440 |
for (cn = 0; cn < DO_NCMDS; cn++) |
441 |
if (!strcmp(cmd, rhdcmd[cn])) |
442 |
break; |
443 |
if (cn >= DO_NCMDS) |
444 |
return(-1); /* not in our list */ |
445 |
/* make argument list */ |
446 |
for (na = 0; *args; na++) { |
447 |
if (na > MAXAC) |
448 |
goto toomany; |
449 |
alist[na] = args; |
450 |
while (*args && !isspace(*args)) |
451 |
args++; |
452 |
while (isspace(*args)) |
453 |
*args++ = '\0'; |
454 |
} |
455 |
alist[na] = NULL; |
456 |
/* execute command */ |
457 |
switch (cn) { |
458 |
case DO_LOAD: /* load an octree */ |
459 |
if (na == 1) |
460 |
dobj_load(alist[0], alist[0]); |
461 |
else if (na == 2) |
462 |
dobj_load(alist[0], alist[1]); |
463 |
else { |
464 |
cmderror(cn, "need octree [name]"); |
465 |
return(0); |
466 |
} |
467 |
break; |
468 |
case DO_UNLOAD: /* clear an object */ |
469 |
if (na > 1) goto toomany; |
470 |
if (na && alist[0][0] == '*') |
471 |
somechange += dobj_cleanup(); |
472 |
else |
473 |
somechange += dobj_unload(na ? alist[0] : curname); |
474 |
break; |
475 |
case DO_XFORM: /* transform object */ |
476 |
case DO_MOVE: |
477 |
if (na && alist[0][0] != '-') { |
478 |
nm = alist[0]; nn = 1; |
479 |
} else { |
480 |
nm = curname; nn = 0; |
481 |
} |
482 |
if (cn == DO_MOVE && nn >= na) { |
483 |
cmderror(cn, "missing transform"); |
484 |
return(0); |
485 |
} |
486 |
somechange += dobj_xform(nm, cn==DO_MOVE, na-nn, alist+nn); |
487 |
break; |
488 |
case DO_UNMOVE: /* undo last transform */ |
489 |
somechange += dobj_unmove(); |
490 |
break; |
491 |
case DO_OBJECT: /* print object statistics */ |
492 |
if (dobj_putstats(na ? alist[0] : curname, sstdout)) |
493 |
if (na && alist[0][0] != '*' && (curobj == NULL || |
494 |
strcmp(alist[0], curobj->name))) |
495 |
savedxf(curobj = getdobj(alist[0])); |
496 |
break; |
497 |
case DO_DUP: /* duplicate object */ |
498 |
for (nn = 0; nn < na; nn++) |
499 |
if (alist[nn][0] == '-') |
500 |
break; |
501 |
switch (nn) { |
502 |
case 0: |
503 |
cmderror(cn, "need new object name"); |
504 |
return(0); |
505 |
case 1: |
506 |
nm = curname; |
507 |
break; |
508 |
case 2: |
509 |
nm = alist[0]; |
510 |
break; |
511 |
default: |
512 |
goto toomany; |
513 |
} |
514 |
if (!dobj_dup(nm, alist[nn-1])) |
515 |
break; |
516 |
if (na > nn) |
517 |
somechange += dobj_xform(curname, 1, na-nn, alist+nn); |
518 |
else |
519 |
curobj->drawcode = DO_HIDE; |
520 |
savedxf(curobj); |
521 |
break; |
522 |
case DO_SHOW: /* change rendering option */ |
523 |
case DO_LIGHT: |
524 |
case DO_HIDE: |
525 |
if (na > 1) goto toomany; |
526 |
dobj_lighting(na ? alist[0] : curname, cn); |
527 |
somechange++; |
528 |
break; |
529 |
default: |
530 |
error(CONSISTENCY, "bad command id in dobj_command"); |
531 |
} |
532 |
return(somechange); |
533 |
toomany: |
534 |
return(cmderror(cn, "too many arguments")); |
535 |
} |
536 |
|
537 |
|
538 |
dobj_load(oct, nam) /* create/load an octree object */ |
539 |
char *oct, *nam; |
540 |
{ |
541 |
char *fpp, fpath[128]; |
542 |
register DOBJECT *op; |
543 |
/* check arguments */ |
544 |
if (oct == NULL) { |
545 |
error(COMMAND, "missing octree"); |
546 |
return(0); |
547 |
} |
548 |
if (nam == NULL) { |
549 |
error(COMMAND, "missing name"); |
550 |
return(0); |
551 |
} |
552 |
if (*nam == '*' | *nam == '-') { |
553 |
error(COMMAND, "illegal name"); |
554 |
return(0); |
555 |
} |
556 |
if (getdobj(nam) != NULL) { |
557 |
error(COMMAND, "name already taken (clear first)"); |
558 |
return(0); |
559 |
} |
560 |
/* get octree path */ |
561 |
if ((fpp = getpath(oct, getrlibpath(), R_OK)) == NULL) { |
562 |
sprintf(errmsg, "cannot find octree \"%s\"", oct); |
563 |
error(COMMAND, errmsg); |
564 |
return(0); |
565 |
} |
566 |
strcpy(fpath, fpp); |
567 |
op = (DOBJECT *)malloc(sizeof(DOBJECT)); |
568 |
if (op == NULL) |
569 |
error(SYSTEM, "out of memory in dobj_load"); |
570 |
/* set struct fields */ |
571 |
strcpy(op->name, nam); |
572 |
op->ol = NULL; |
573 |
op->drawcode = DO_HIDE; |
574 |
setident4(op->xfb.f.xfm); op->xfb.f.sca = 1.; |
575 |
setident4(op->xfb.b.xfm); op->xfb.b.sca = 1.; |
576 |
op->xfav[op->xfac=0] = NULL; |
577 |
/* load octree into display list */ |
578 |
dolights = 0; |
579 |
domats = 1; |
580 |
op->listid = rgl_octlist(fpath, op->center, &op->radius, &op->nlists); |
581 |
/* start rtrace */ |
582 |
rtargv[RTARGC-1] = fpath; |
583 |
rtargv[RTARGC] = NULL; |
584 |
open_process(&(op->rtp), rtargv); |
585 |
/* insert into main list */ |
586 |
op->next = dobjects; |
587 |
curobj = dobjects = op; |
588 |
savedxf(NULL); |
589 |
return(1); |
590 |
} |
591 |
|
592 |
|
593 |
dobj_unload(nam) /* free the named object */ |
594 |
char *nam; |
595 |
{ |
596 |
register DOBJECT *op; |
597 |
|
598 |
if ((op = getdobj(nam)) == NULL) { |
599 |
error(COMMAND, "no object"); |
600 |
return(0); |
601 |
} |
602 |
freedobj(op); |
603 |
savedxf(curobj = NULL); |
604 |
return(1); |
605 |
} |
606 |
|
607 |
|
608 |
dobj_cleanup() /* free all resources */ |
609 |
{ |
610 |
register DLIGHTS *lp; |
611 |
|
612 |
while (dobjects != NULL) |
613 |
freedobj(dobjects); |
614 |
savedxf(curobj = NULL); |
615 |
while ((lp = dlightsets) != NULL) { |
616 |
dlightsets = lp->next; |
617 |
free((void *)lp); |
618 |
} |
619 |
return(1); |
620 |
} |
621 |
|
622 |
|
623 |
dobj_xform(nam, rel, ac, av) /* set/add transform for nam */ |
624 |
char *nam; |
625 |
int rel, ac; |
626 |
char **av; |
627 |
{ |
628 |
register DOBJECT *op; |
629 |
FVECT cent; |
630 |
double rad; |
631 |
char scoord[16]; |
632 |
int i; |
633 |
|
634 |
if ((op = getdobj(nam)) == NULL) { |
635 |
error(COMMAND, "no object"); |
636 |
return(0); |
637 |
} |
638 |
if (rel) |
639 |
rel = op->xfac + 8; |
640 |
if (ac + rel > MAXAC) { |
641 |
error(COMMAND, "too many transform arguments"); |
642 |
return(0); |
643 |
} |
644 |
savedxf(curobj = op); /* remember current transform */ |
645 |
if (rel && ac == 4 && !strcmp(av[0], "-t")) |
646 |
rel = -1; /* don't move for translate */ |
647 |
else { |
648 |
getdcent(cent, op); /* don't move if near orig. */ |
649 |
rad = getdrad(op); |
650 |
if (DOT(cent,cent) < rad*rad) |
651 |
rel = -1; |
652 |
} |
653 |
if (!rel) { /* remove old transform */ |
654 |
while (op->xfac) |
655 |
freestr(op->xfav[--op->xfac]); |
656 |
} else if (rel > 0) { /* relative move */ |
657 |
op->xfav[op->xfac++] = savestr("-t"); |
658 |
for (i = 0; i < 3; i++) { |
659 |
sprintf(scoord, "%.4e", -cent[i]); |
660 |
op->xfav[op->xfac++] = savestr(scoord); |
661 |
} |
662 |
} |
663 |
while (ac--) |
664 |
op->xfav[op->xfac++] = savestr(*av++); |
665 |
if (rel > 0) { /* move back */ |
666 |
op->xfav[op->xfac++] = savestr("-t"); |
667 |
for (i = 0; i < 3; i++) { |
668 |
sprintf(scoord, "%.4e", cent[i]); |
669 |
op->xfav[op->xfac++] = savestr(scoord); |
670 |
} |
671 |
} |
672 |
op->xfav[op->xfac] = NULL; |
673 |
if (fullxf(&op->xfb, op->xfac, op->xfav) != op->xfac) { |
674 |
error(COMMAND, "bad transform arguments"); |
675 |
dobj_unmove(); |
676 |
savedxf(op); /* save current transform instead */ |
677 |
return(0); |
678 |
} |
679 |
/* don't know local lights anymore */ |
680 |
getdlights(op, 0); |
681 |
return(1); |
682 |
} |
683 |
|
684 |
|
685 |
dobj_putstats(nam, fp) /* put out statistics for nam */ |
686 |
char *nam; |
687 |
FILE *fp; |
688 |
{ |
689 |
FVECT ocent; |
690 |
register DOBJECT *op; |
691 |
register int i; |
692 |
|
693 |
if (nam == NULL) { |
694 |
error(COMMAND, "no current object"); |
695 |
return(0); |
696 |
} |
697 |
if (nam[0] == '*') { |
698 |
i = 0; |
699 |
for (op = dobjects; op != NULL; op = op->next) |
700 |
i += dobj_putstats(op->name, fp); |
701 |
return(i); |
702 |
} |
703 |
if ((op = getdobj(nam)) == NULL) { |
704 |
error(COMMAND, "unknown object"); |
705 |
return(0); |
706 |
} |
707 |
getdcent(ocent, op); |
708 |
fprintf(fp, "%s: %s, center [%g %g %g], radius %g", op->name, |
709 |
op->drawcode==DO_HIDE ? "hidden" : |
710 |
op->drawcode==DO_LIGHT && op->ol!=NULL ? "lighted" : |
711 |
"shown", |
712 |
ocent[0],ocent[1],ocent[2], getdrad(op)); |
713 |
if (op->xfac) |
714 |
fputs(", (xform", fp); |
715 |
for (i = 0; i < op->xfac; i++) { |
716 |
putc(' ', fp); |
717 |
fputs(op->xfav[i], fp); |
718 |
} |
719 |
if (op->xfac) |
720 |
fputc(')', fp); |
721 |
fputc('\n', fp); |
722 |
return(1); |
723 |
} |
724 |
|
725 |
|
726 |
dobj_unmove() /* undo last transform change */ |
727 |
{ |
728 |
int txfac; |
729 |
char *txfav[MAXAC+1]; |
730 |
|
731 |
if (curobj == NULL) { |
732 |
error(COMMAND, "no current object"); |
733 |
return(0); |
734 |
} |
735 |
/* hold last transform */ |
736 |
memcpy((void *)txfav, (void *)lastxfav, |
737 |
(txfac=lastxfac)*sizeof(char *)); |
738 |
/* save this transform */ |
739 |
memcpy((void *)lastxfav, (void *)curobj->xfav, |
740 |
(lastxfac=curobj->xfac)*sizeof(char *)); |
741 |
/* copy back last transform */ |
742 |
memcpy((void *)curobj->xfav, (void *)txfav, |
743 |
(curobj->xfac=txfac)*sizeof(char *)); |
744 |
/* set matrices */ |
745 |
fullxf(&curobj->xfb, curobj->xfac, curobj->xfav); |
746 |
/* don't know local lights anymore */ |
747 |
getdlights(curobj, 0); |
748 |
return(1); |
749 |
} |
750 |
|
751 |
|
752 |
dobj_dup(oldnm, nam) /* duplicate object oldnm as nam */ |
753 |
char *oldnm, *nam; |
754 |
{ |
755 |
register DOBJECT *op, *opdup; |
756 |
/* check arguments */ |
757 |
if ((op = getdobj(oldnm)) == NULL) { |
758 |
error(COMMAND, "no object"); |
759 |
return(0); |
760 |
} |
761 |
if (nam == NULL) { |
762 |
error(COMMAND, "missing name"); |
763 |
return(0); |
764 |
} |
765 |
if (*nam == '*' | *nam == '-') { |
766 |
error(COMMAND, "illegal name"); |
767 |
return(0); |
768 |
} |
769 |
if (getdobj(nam) != NULL) { |
770 |
error(COMMAND, "name already taken (clear first)"); |
771 |
return(0); |
772 |
} |
773 |
/* allocate and copy struct */ |
774 |
opdup = (DOBJECT *)malloc(sizeof(DOBJECT)); |
775 |
if (opdup == NULL) |
776 |
error(SYSTEM, "out of memory in dobj_dup"); |
777 |
*opdup = *op; |
778 |
/* rename */ |
779 |
strcpy(opdup->name, nam); |
780 |
/* get our own copy of transform */ |
781 |
for (opdup->xfac = 0; opdup->xfac < op->xfac; opdup->xfac++) |
782 |
opdup->xfav[opdup->xfac] = savestr(op->xfav[opdup->xfac]); |
783 |
opdup->xfav[opdup->xfac] = NULL; |
784 |
/* insert it into our list */ |
785 |
opdup->next = dobjects; |
786 |
curobj = dobjects = opdup; |
787 |
return(1); |
788 |
} |
789 |
|
790 |
|
791 |
dobj_lighting(nam, cn) /* set up lighting for display object */ |
792 |
char *nam; |
793 |
int cn; |
794 |
{ |
795 |
int i, res[2]; |
796 |
VIEW *dv; |
797 |
register DOBJECT *op; |
798 |
|
799 |
if (nam == NULL) { |
800 |
error(COMMAND, "no current object"); |
801 |
return(0); |
802 |
} |
803 |
if (nam[0] == '*') { |
804 |
for (op = dobjects; op != NULL; op = op->next) |
805 |
if ((op->drawcode = cn) == DO_LIGHT) |
806 |
getdlights(op, 1); |
807 |
else |
808 |
op->ol = NULL; |
809 |
} else if ((op = getdobj(nam)) == NULL) { |
810 |
error(COMMAND, "unknown object"); |
811 |
return(0); |
812 |
} else if ((op->drawcode = cn) == DO_LIGHT) { |
813 |
if (!getdlights(op, 1)) |
814 |
error(COMMAND, "insufficient samples to light object"); |
815 |
} else |
816 |
op->ol = NULL; |
817 |
|
818 |
if (dobj_lightsamp != NULL) { /* restore beam set */ |
819 |
dobj_lightsamp = NULL; |
820 |
beam_init(1); |
821 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
822 |
beam_view(dv, res[0], res[1]); |
823 |
beam_sync(1); /* update server */ |
824 |
} |
825 |
} |
826 |
|
827 |
|
828 |
double |
829 |
dobj_trace(nm, rorg, rdir) /* check for ray intersection with object(s) */ |
830 |
char nm[]; |
831 |
FVECT rorg, rdir; |
832 |
{ |
833 |
register DOBJECT *op; |
834 |
FVECT xorg, xdir; |
835 |
double darr[6]; |
836 |
/* check each visible object? */ |
837 |
if (nm == NULL || *nm == '*') { |
838 |
double dist, mindist = 1.01*FHUGE; |
839 |
|
840 |
if (nm != NULL) nm[0] = '\0'; |
841 |
for (op = dobjects; op != NULL; op = op->next) { |
842 |
if (op->drawcode == DO_HIDE) |
843 |
continue; |
844 |
dist = dobj_trace(op->name, rorg, rdir); |
845 |
if (dist < mindist) { |
846 |
if (nm != NULL) strcpy(nm, op->name); |
847 |
mindist = dist; |
848 |
} |
849 |
} |
850 |
return(mindist); |
851 |
} |
852 |
/* else check particular object */ |
853 |
if ((op = getdobj(nm)) == NULL) { |
854 |
error(COMMAND, "unknown object"); |
855 |
return(FHUGE); |
856 |
} |
857 |
if (op->xfac) { /* put ray in local coordinates */ |
858 |
multp3(xorg, rorg, op->xfb.b.xfm); |
859 |
multv3(xdir, rdir, op->xfb.b.xfm); |
860 |
VCOPY(darr, xorg); VCOPY(darr+3, xdir); |
861 |
} else { |
862 |
VCOPY(darr, rorg); VCOPY(darr+3, rdir); |
863 |
} |
864 |
/* trace it */ |
865 |
if (process(&(op->rtp), (char *)darr, (char *)darr, sizeof(double), |
866 |
6*sizeof(double)) != sizeof(double)) |
867 |
error(SYSTEM, "rtrace communication error"); |
868 |
/* return distance */ |
869 |
if (darr[0] >= .99*FHUGE) |
870 |
return(FHUGE); |
871 |
return(darr[0]*op->xfb.f.sca); |
872 |
} |
873 |
|
874 |
|
875 |
int |
876 |
dobj_render() /* render our objects in OpenGL */ |
877 |
{ |
878 |
int nrendered = 0; |
879 |
GLboolean normalizing; |
880 |
GLfloat vec[4]; |
881 |
FVECT v1; |
882 |
register DOBJECT *op; |
883 |
register int i; |
884 |
/* anything to render? */ |
885 |
for (op = dobjects; op != NULL; op = op->next) |
886 |
if (op->drawcode != DO_HIDE) |
887 |
break; |
888 |
if (op == NULL) |
889 |
return(0); |
890 |
/* set up general rendering params */ |
891 |
glGetBooleanv(GL_NORMALIZE, &normalizing); |
892 |
glPushAttrib(GL_LIGHTING_BIT|GL_TRANSFORM_BIT|GL_ENABLE_BIT| |
893 |
GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_POLYGON_BIT); |
894 |
glDepthFunc(GL_LESS); |
895 |
glEnable(GL_DEPTH_TEST); |
896 |
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
897 |
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
898 |
glShadeModel(GL_SMOOTH); |
899 |
glFrontFace(GL_CCW); |
900 |
glDisable(GL_CULL_FACE); |
901 |
for (i = MAXLIGHTS; i--; ) |
902 |
glDisable(glightid[i]); |
903 |
glEnable(GL_LIGHTING); |
904 |
rgl_checkerr("setting rendering modes in dobj_render"); |
905 |
/* render each object */ |
906 |
for (op = dobjects; op != NULL; op = op->next) { |
907 |
if (op->drawcode == DO_HIDE) |
908 |
continue; |
909 |
/* set up lighting */ |
910 |
if (op->drawcode == DO_LIGHT && op->ol != NULL) { |
911 |
BYTE pval; |
912 |
double expval, d; |
913 |
/* use computed sources */ |
914 |
if (tmMapPixels(&pval, &op->ol->larb, TM_NOCHROM, 1) |
915 |
!= TM_E_OK) |
916 |
error(CONSISTENCY, "dobj_render w/o tone map"); |
917 |
expval = pval * (WHTEFFICACY/256.) / |
918 |
tmLuminance(op->ol->larb); |
919 |
vec[0] = expval * colval(op->ol->lamb,RED); |
920 |
vec[1] = expval * colval(op->ol->lamb,GRN); |
921 |
vec[2] = expval * colval(op->ol->lamb,BLU); |
922 |
vec[3] = 1.; |
923 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
924 |
for (i = op->ol->nl; i--; ) { |
925 |
VCOPY(vec, op->ol->li[i].direc); |
926 |
vec[3] = 0.; |
927 |
glLightfv(glightid[i], GL_POSITION, vec); |
928 |
d = expval * op->ol->li[i].omega; |
929 |
vec[0] = d * colval(op->ol->li[i].val,RED); |
930 |
vec[1] = d * colval(op->ol->li[i].val,GRN); |
931 |
vec[2] = d * colval(op->ol->li[i].val,BLU); |
932 |
vec[3] = 1.; |
933 |
glLightfv(glightid[i], GL_SPECULAR, vec); |
934 |
glLightfv(glightid[i], GL_DIFFUSE, vec); |
935 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
936 |
glLightfv(glightid[i], GL_AMBIENT, vec); |
937 |
glEnable(glightid[i]); |
938 |
} |
939 |
} else { /* fake lighting */ |
940 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
941 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
942 |
getdcent(v1, op); |
943 |
VSUB(v1, odev.v.vp, v1); |
944 |
if (normalize(v1) <= getdrad(op)) { |
945 |
vec[0] = -odev.v.vdir[0]; |
946 |
vec[1] = -odev.v.vdir[1]; |
947 |
vec[2] = -odev.v.vdir[2]; |
948 |
} else |
949 |
VCOPY(vec, v1); |
950 |
vec[3] = 0.; |
951 |
glLightfv(GL_LIGHT0, GL_POSITION, vec); |
952 |
vec[0] = vec[1] = vec[2] = .7; vec[3] = 1.; |
953 |
glLightfv(GL_LIGHT0, GL_SPECULAR, vec); |
954 |
glLightfv(GL_LIGHT0, GL_DIFFUSE, vec); |
955 |
vec[0] = vec[1] = vec[2] = .3; vec[3] = 1.; |
956 |
glLightfv(GL_LIGHT0, GL_AMBIENT, vec); |
957 |
glEnable(GL_LIGHT0); |
958 |
} |
959 |
/* set up object transform */ |
960 |
if (op->xfac) { |
961 |
if (!normalizing && op->xfb.f.sca < 1.-FTINY | |
962 |
op->xfb.f.sca > 1.+FTINY) |
963 |
glEnable(GL_NORMALIZE); |
964 |
glMatrixMode(GL_MODELVIEW); |
965 |
glPushMatrix(); |
966 |
/* matrix order works out to same */ |
967 |
#ifdef SMLFLT |
968 |
glMultMatrixf((GLfloat *)op->xfb.f.xfm); |
969 |
#else |
970 |
glMultMatrixd((GLdouble *)op->xfb.f.xfm); |
971 |
#endif |
972 |
} |
973 |
/* render the display list */ |
974 |
glCallList(op->listid); |
975 |
nrendered++; |
976 |
/* restore matrix */ |
977 |
if (op->xfac) { |
978 |
glMatrixMode(GL_MODELVIEW); |
979 |
glPopMatrix(); |
980 |
if (!normalizing) |
981 |
glDisable(GL_NORMALIZE); |
982 |
} |
983 |
/* restore lighting */ |
984 |
if (op->drawcode == DO_LIGHT && op->ol != NULL) |
985 |
for (i = op->ol->nl; i--; ) |
986 |
glDisable(glightid[i]); |
987 |
else |
988 |
glDisable(GL_LIGHT0); |
989 |
/* check errors */ |
990 |
} |
991 |
glPopAttrib(); /* restore rendering params */ |
992 |
rgl_checkerr("rendering objects in dobj_render"); |
993 |
return(nrendered); |
994 |
} |