| 1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Routines for loading and displaying Radiance objects in rholo with GLX. |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "radogl.h" |
| 12 |
#include "tonemap.h" |
| 13 |
#include "rhdisp.h" |
| 14 |
#include "rhdriver.h" |
| 15 |
#include "rhdobj.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 |
FLOAT radius; /* orig. object radius */ |
| 57 |
int listid; /* GL display list identifier */ |
| 58 |
int nlists; /* number of lists allocated */ |
| 59 |
int rtp[3]; /* 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 */ |
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COLOR val; /* value (sum) */ |
| 83 |
} ssamp[NALT][NAZI]; /* current sphere samples */ |
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|
| 85 |
#define curname (curobj==NULL ? (char *)NULL : curobj->name) |
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|
| 87 |
|
| 88 |
static DOBJECT * |
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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 |
} |
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|
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|
| 105 |
static |
| 106 |
freedobj(op) /* free resources and memory assoc. with op */ |
| 107 |
register DOBJECT *op; |
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{ |
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int foundlink = 0; |
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DOBJECT ohead; |
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register DOBJECT *opl; |
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|
| 113 |
if (op == NULL) |
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return(0); |
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ohead.next = dobjects; |
| 116 |
for (opl = &ohead; opl->next != NULL; opl = opl->next) { |
| 117 |
if (opl->next == op && (opl->next = op->next) == NULL) |
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break; |
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foundlink += opl->next->listid == op->listid; |
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} |
| 121 |
dobjects = ohead.next; |
| 122 |
if (!foundlink) { |
| 123 |
glDeleteLists(op->listid, op->nlists); |
| 124 |
close_process(op->rtp); |
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} |
| 126 |
while (op->xfac) |
| 127 |
freestr(op->xfav[--op->xfac]); |
| 128 |
free((char *)op); |
| 129 |
return(1); |
| 130 |
} |
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|
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|
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static |
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savedxf(op) /* save transform for display object */ |
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register DOBJECT *op; |
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{ |
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/* free old */ |
| 138 |
while (lastxfac) |
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freestr(lastxfav[--lastxfac]); |
| 140 |
/* nothing to save? */ |
| 141 |
if (op == NULL) { |
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lastxfav[0] = NULL; |
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return(0); |
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} |
| 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 |
} |
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|
| 152 |
|
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static |
| 154 |
ssph_sample(clr, direc, pos) /* add sample to current source sphere */ |
| 155 |
COLR clr; |
| 156 |
FVECT direc, pos; |
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{ |
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COLOR col; |
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double d; |
| 160 |
register int alt, azi; |
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|
| 162 |
if (dlightsets == NULL) |
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return; |
| 164 |
if (pos == NULL) |
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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 |
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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])); |
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colr_color(col, clr); |
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addcolor(ssamp[alt][azi].val, col); |
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ssamp[alt][azi].nsamp++; |
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} |
| 178 |
|
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|
| 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) |
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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++) |
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if (i != sp[1]) { |
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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 |
bzero((char *)ssamp, 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 |
copystruct(&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((char *)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 |
extern char *getlibpath(), *getpath(); |
| 542 |
char *fpp, fpath[128]; |
| 543 |
register DOBJECT *op; |
| 544 |
/* check arguments */ |
| 545 |
if (oct == NULL) { |
| 546 |
error(COMMAND, "missing octree"); |
| 547 |
return(0); |
| 548 |
} |
| 549 |
if (nam == NULL) { |
| 550 |
error(COMMAND, "missing name"); |
| 551 |
return(0); |
| 552 |
} |
| 553 |
if (*nam == '*' | *nam == '-') { |
| 554 |
error(COMMAND, "illegal name"); |
| 555 |
return(0); |
| 556 |
} |
| 557 |
if (getdobj(nam) != NULL) { |
| 558 |
error(COMMAND, "name already taken (clear first)"); |
| 559 |
return(0); |
| 560 |
} |
| 561 |
/* get octree path */ |
| 562 |
if ((fpp = getpath(oct, getlibpath(), R_OK)) == NULL) { |
| 563 |
sprintf(errmsg, "cannot find octree \"%s\"", oct); |
| 564 |
error(COMMAND, errmsg); |
| 565 |
return(0); |
| 566 |
} |
| 567 |
strcpy(fpath, fpp); |
| 568 |
op = (DOBJECT *)malloc(sizeof(DOBJECT)); |
| 569 |
if (op == NULL) |
| 570 |
error(SYSTEM, "out of memory in dobj_load"); |
| 571 |
/* set struct fields */ |
| 572 |
strcpy(op->name, nam); |
| 573 |
op->ol = NULL; |
| 574 |
op->drawcode = DO_HIDE; |
| 575 |
setident4(op->xfb.f.xfm); op->xfb.f.sca = 1.; |
| 576 |
setident4(op->xfb.b.xfm); op->xfb.b.sca = 1.; |
| 577 |
op->xfav[op->xfac=0] = NULL; |
| 578 |
/* load octree into display list */ |
| 579 |
dolights = 0; |
| 580 |
domats = 1; |
| 581 |
op->listid = rgl_octlist(fpath, op->center, &op->radius, &op->nlists); |
| 582 |
/* start rtrace */ |
| 583 |
rtargv[RTARGC-1] = fpath; |
| 584 |
rtargv[RTARGC] = NULL; |
| 585 |
open_process(op->rtp, rtargv); |
| 586 |
/* insert into main list */ |
| 587 |
op->next = dobjects; |
| 588 |
curobj = dobjects = op; |
| 589 |
savedxf(NULL); |
| 590 |
return(1); |
| 591 |
} |
| 592 |
|
| 593 |
|
| 594 |
dobj_unload(nam) /* free the named object */ |
| 595 |
char *nam; |
| 596 |
{ |
| 597 |
register DOBJECT *op; |
| 598 |
|
| 599 |
if ((op = getdobj(nam)) == NULL) { |
| 600 |
error(COMMAND, "no object"); |
| 601 |
return(0); |
| 602 |
} |
| 603 |
freedobj(op); |
| 604 |
savedxf(curobj = NULL); |
| 605 |
return(1); |
| 606 |
} |
| 607 |
|
| 608 |
|
| 609 |
dobj_cleanup() /* free all resources */ |
| 610 |
{ |
| 611 |
register DLIGHTS *lp; |
| 612 |
|
| 613 |
while (dobjects != NULL) |
| 614 |
freedobj(dobjects); |
| 615 |
savedxf(curobj = NULL); |
| 616 |
while ((lp = dlightsets) != NULL) { |
| 617 |
dlightsets = lp->next; |
| 618 |
free((char *)lp); |
| 619 |
} |
| 620 |
return(1); |
| 621 |
} |
| 622 |
|
| 623 |
|
| 624 |
dobj_xform(nam, rel, ac, av) /* set/add transform for nam */ |
| 625 |
char *nam; |
| 626 |
int rel, ac; |
| 627 |
char **av; |
| 628 |
{ |
| 629 |
register DOBJECT *op; |
| 630 |
FVECT cent; |
| 631 |
double rad; |
| 632 |
char scoord[16]; |
| 633 |
int i; |
| 634 |
|
| 635 |
if ((op = getdobj(nam)) == NULL) { |
| 636 |
error(COMMAND, "no object"); |
| 637 |
return(0); |
| 638 |
} |
| 639 |
if (rel) |
| 640 |
rel = op->xfac + 8; |
| 641 |
if (ac + rel > MAXAC) { |
| 642 |
error(COMMAND, "too many transform arguments"); |
| 643 |
return(0); |
| 644 |
} |
| 645 |
savedxf(curobj = op); /* remember current transform */ |
| 646 |
if (rel && ac == 4 && !strcmp(av[0], "-t")) |
| 647 |
rel = -1; /* don't move for translate */ |
| 648 |
else { |
| 649 |
getdcent(cent, op); /* don't move if near orig. */ |
| 650 |
rad = getdrad(op); |
| 651 |
if (DOT(cent,cent) < rad*rad) |
| 652 |
rel = -1; |
| 653 |
} |
| 654 |
if (!rel) { /* remove old transform */ |
| 655 |
while (op->xfac) |
| 656 |
freestr(op->xfav[--op->xfac]); |
| 657 |
} else if (rel > 0) { /* relative move */ |
| 658 |
op->xfav[op->xfac++] = savestr("-t"); |
| 659 |
for (i = 0; i < 3; i++) { |
| 660 |
sprintf(scoord, "%.4e", -cent[i]); |
| 661 |
op->xfav[op->xfac++] = savestr(scoord); |
| 662 |
} |
| 663 |
} |
| 664 |
while (ac--) |
| 665 |
op->xfav[op->xfac++] = savestr(*av++); |
| 666 |
if (rel > 0) { /* move back */ |
| 667 |
op->xfav[op->xfac++] = savestr("-t"); |
| 668 |
for (i = 0; i < 3; i++) { |
| 669 |
sprintf(scoord, "%.4e", cent[i]); |
| 670 |
op->xfav[op->xfac++] = savestr(scoord); |
| 671 |
} |
| 672 |
} |
| 673 |
op->xfav[op->xfac] = NULL; |
| 674 |
if (fullxf(&op->xfb, op->xfac, op->xfav) != op->xfac) { |
| 675 |
error(COMMAND, "bad transform arguments"); |
| 676 |
dobj_unmove(); |
| 677 |
savedxf(op); /* save current transform instead */ |
| 678 |
return(0); |
| 679 |
} |
| 680 |
/* don't know local lights anymore */ |
| 681 |
getdlights(op, 0); |
| 682 |
return(1); |
| 683 |
} |
| 684 |
|
| 685 |
|
| 686 |
dobj_putstats(nam, fp) /* put out statistics for nam */ |
| 687 |
char *nam; |
| 688 |
FILE *fp; |
| 689 |
{ |
| 690 |
FVECT ocent; |
| 691 |
register DOBJECT *op; |
| 692 |
register int i; |
| 693 |
|
| 694 |
if (nam == NULL) { |
| 695 |
error(COMMAND, "no current object"); |
| 696 |
return(0); |
| 697 |
} |
| 698 |
if (nam[0] == '*') { |
| 699 |
i = 0; |
| 700 |
for (op = dobjects; op != NULL; op = op->next) |
| 701 |
i += dobj_putstats(op->name, fp); |
| 702 |
return(i); |
| 703 |
} |
| 704 |
if ((op = getdobj(nam)) == NULL) { |
| 705 |
error(COMMAND, "unknown object"); |
| 706 |
return(0); |
| 707 |
} |
| 708 |
getdcent(ocent, op); |
| 709 |
fprintf(fp, "%s: %s, center [%g %g %g], radius %g", op->name, |
| 710 |
op->drawcode==DO_HIDE ? "hidden" : |
| 711 |
op->drawcode==DO_LIGHT && op->ol!=NULL ? "lighted" : |
| 712 |
"shown", |
| 713 |
ocent[0],ocent[1],ocent[2], getdrad(op)); |
| 714 |
if (op->xfac) |
| 715 |
fputs(", (xform", fp); |
| 716 |
for (i = 0; i < op->xfac; i++) { |
| 717 |
putc(' ', fp); |
| 718 |
fputs(op->xfav[i], fp); |
| 719 |
} |
| 720 |
if (op->xfac) |
| 721 |
fputc(')', fp); |
| 722 |
fputc('\n', fp); |
| 723 |
return(1); |
| 724 |
} |
| 725 |
|
| 726 |
|
| 727 |
dobj_unmove() /* undo last transform change */ |
| 728 |
{ |
| 729 |
int txfac; |
| 730 |
char *txfav[MAXAC+1]; |
| 731 |
|
| 732 |
if (curobj == NULL) { |
| 733 |
error(COMMAND, "no current object"); |
| 734 |
return(0); |
| 735 |
} |
| 736 |
/* hold last transform */ |
| 737 |
bcopy((char *)lastxfav, (char *)txfav, |
| 738 |
(txfac=lastxfac)*sizeof(char *)); |
| 739 |
/* save this transform */ |
| 740 |
bcopy((char *)curobj->xfav, (char *)lastxfav, |
| 741 |
(lastxfac=curobj->xfac)*sizeof(char *)); |
| 742 |
/* copy back last transform */ |
| 743 |
bcopy((char *)txfav, (char *)curobj->xfav, |
| 744 |
(curobj->xfac=txfac)*sizeof(char *)); |
| 745 |
/* set matrices */ |
| 746 |
fullxf(&curobj->xfb, curobj->xfac, curobj->xfav); |
| 747 |
/* don't know local lights anymore */ |
| 748 |
getdlights(curobj, 0); |
| 749 |
return(1); |
| 750 |
} |
| 751 |
|
| 752 |
|
| 753 |
dobj_dup(oldnm, nam) /* duplicate object oldnm as nam */ |
| 754 |
char *oldnm, *nam; |
| 755 |
{ |
| 756 |
register DOBJECT *op, *opdup; |
| 757 |
/* check arguments */ |
| 758 |
if ((op = getdobj(oldnm)) == NULL) { |
| 759 |
error(COMMAND, "no object"); |
| 760 |
return(0); |
| 761 |
} |
| 762 |
if (nam == NULL) { |
| 763 |
error(COMMAND, "missing name"); |
| 764 |
return(0); |
| 765 |
} |
| 766 |
if (*nam == '*' | *nam == '-') { |
| 767 |
error(COMMAND, "illegal name"); |
| 768 |
return(0); |
| 769 |
} |
| 770 |
if (getdobj(nam) != NULL) { |
| 771 |
error(COMMAND, "name already taken (clear first)"); |
| 772 |
return(0); |
| 773 |
} |
| 774 |
/* allocate and copy struct */ |
| 775 |
opdup = (DOBJECT *)malloc(sizeof(DOBJECT)); |
| 776 |
if (opdup == NULL) |
| 777 |
error(SYSTEM, "out of memory in dobj_dup"); |
| 778 |
copystruct(opdup, op); |
| 779 |
/* rename */ |
| 780 |
strcpy(opdup->name, nam); |
| 781 |
/* get our own copy of transform */ |
| 782 |
for (opdup->xfac = 0; opdup->xfac < op->xfac; opdup->xfac++) |
| 783 |
opdup->xfav[opdup->xfac] = savestr(op->xfav[opdup->xfac]); |
| 784 |
opdup->xfav[opdup->xfac] = NULL; |
| 785 |
/* insert it into our list */ |
| 786 |
opdup->next = dobjects; |
| 787 |
curobj = dobjects = opdup; |
| 788 |
return(1); |
| 789 |
} |
| 790 |
|
| 791 |
|
| 792 |
dobj_lighting(nam, cn) /* set up lighting for display object */ |
| 793 |
char *nam; |
| 794 |
int cn; |
| 795 |
{ |
| 796 |
int i, res[2]; |
| 797 |
VIEW *dv; |
| 798 |
register DOBJECT *op; |
| 799 |
|
| 800 |
if (nam == NULL) { |
| 801 |
error(COMMAND, "no current object"); |
| 802 |
return(0); |
| 803 |
} |
| 804 |
if (nam[0] == '*') { |
| 805 |
for (op = dobjects; op != NULL; op = op->next) |
| 806 |
if ((op->drawcode = cn) == DO_LIGHT) |
| 807 |
getdlights(op, 1); |
| 808 |
else |
| 809 |
op->ol = NULL; |
| 810 |
} else if ((op = getdobj(nam)) == NULL) { |
| 811 |
error(COMMAND, "unknown object"); |
| 812 |
return(0); |
| 813 |
} else if ((op->drawcode = cn) == DO_LIGHT) { |
| 814 |
if (!getdlights(op, 1)) |
| 815 |
error(COMMAND, "insufficient samples to light object"); |
| 816 |
} else |
| 817 |
op->ol = NULL; |
| 818 |
|
| 819 |
if (dobj_lightsamp != NULL) { /* restore beam set */ |
| 820 |
dobj_lightsamp = NULL; |
| 821 |
beam_init(1); |
| 822 |
for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) |
| 823 |
beam_view(dv, res[0], res[1]); |
| 824 |
beam_sync(1); /* update server */ |
| 825 |
} |
| 826 |
} |
| 827 |
|
| 828 |
|
| 829 |
double |
| 830 |
dobj_trace(nm, rorg, rdir) /* check for ray intersection with object(s) */ |
| 831 |
char nm[]; |
| 832 |
FVECT rorg, rdir; |
| 833 |
{ |
| 834 |
register DOBJECT *op; |
| 835 |
FVECT xorg, xdir; |
| 836 |
double darr[6]; |
| 837 |
/* check each visible object? */ |
| 838 |
if (nm == NULL || *nm == '*') { |
| 839 |
double dist, mindist = 1.01*FHUGE; |
| 840 |
|
| 841 |
if (nm != NULL) nm[0] = '\0'; |
| 842 |
for (op = dobjects; op != NULL; op = op->next) { |
| 843 |
if (op->drawcode == DO_HIDE) |
| 844 |
continue; |
| 845 |
dist = dobj_trace(op->name, rorg, rdir); |
| 846 |
if (dist < mindist) { |
| 847 |
if (nm != NULL) strcpy(nm, op->name); |
| 848 |
mindist = dist; |
| 849 |
} |
| 850 |
} |
| 851 |
return(mindist); |
| 852 |
} |
| 853 |
/* else check particular object */ |
| 854 |
if ((op = getdobj(nm)) == NULL) { |
| 855 |
error(COMMAND, "unknown object"); |
| 856 |
return(FHUGE); |
| 857 |
} |
| 858 |
if (op->xfac) { /* put ray in local coordinates */ |
| 859 |
multp3(xorg, rorg, op->xfb.b.xfm); |
| 860 |
multv3(xdir, rdir, op->xfb.b.xfm); |
| 861 |
VCOPY(darr, xorg); VCOPY(darr+3, xdir); |
| 862 |
} else { |
| 863 |
VCOPY(darr, rorg); VCOPY(darr+3, rdir); |
| 864 |
} |
| 865 |
/* trace it */ |
| 866 |
if (process(op->rtp, darr, darr, sizeof(double), |
| 867 |
6*sizeof(double)) != sizeof(double)) |
| 868 |
error(SYSTEM, "rtrace communication error"); |
| 869 |
/* return distance */ |
| 870 |
if (darr[0] >= .99*FHUGE) |
| 871 |
return(FHUGE); |
| 872 |
return(darr[0]*op->xfb.f.sca); |
| 873 |
} |
| 874 |
|
| 875 |
|
| 876 |
int |
| 877 |
dobj_render() /* render our objects in OpenGL */ |
| 878 |
{ |
| 879 |
int nrendered = 0; |
| 880 |
GLboolean normalizing; |
| 881 |
GLfloat vec[4]; |
| 882 |
FVECT v1; |
| 883 |
register DOBJECT *op; |
| 884 |
register int i; |
| 885 |
/* anything to render? */ |
| 886 |
for (op = dobjects; op != NULL; op = op->next) |
| 887 |
if (op->drawcode != DO_HIDE) |
| 888 |
break; |
| 889 |
if (op == NULL) |
| 890 |
return(0); |
| 891 |
/* set up general rendering params */ |
| 892 |
glGetBooleanv(GL_NORMALIZE, &normalizing); |
| 893 |
glPushAttrib(GL_LIGHTING_BIT|GL_TRANSFORM_BIT|GL_ENABLE_BIT| |
| 894 |
GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_POLYGON_BIT); |
| 895 |
glDepthFunc(GL_LESS); |
| 896 |
glEnable(GL_DEPTH_TEST); |
| 897 |
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); |
| 898 |
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
| 899 |
glShadeModel(GL_SMOOTH); |
| 900 |
glFrontFace(GL_CCW); |
| 901 |
glDisable(GL_CULL_FACE); |
| 902 |
for (i = MAXLIGHTS; i--; ) |
| 903 |
glDisable(glightid[i]); |
| 904 |
glEnable(GL_LIGHTING); |
| 905 |
rgl_checkerr("setting rendering modes in dobj_render"); |
| 906 |
/* render each object */ |
| 907 |
for (op = dobjects; op != NULL; op = op->next) { |
| 908 |
if (op->drawcode == DO_HIDE) |
| 909 |
continue; |
| 910 |
/* set up lighting */ |
| 911 |
if (op->drawcode == DO_LIGHT && op->ol != NULL) { |
| 912 |
BYTE pval; |
| 913 |
double expval, d; |
| 914 |
/* use computed sources */ |
| 915 |
if (tmMapPixels(&pval, &op->ol->larb, TM_NOCHROM, 1) |
| 916 |
!= TM_E_OK) |
| 917 |
error(CONSISTENCY, "dobj_render w/o tone map"); |
| 918 |
expval = pval * (WHTEFFICACY/256.) / |
| 919 |
tmLuminance(op->ol->larb); |
| 920 |
vec[0] = expval * colval(op->ol->lamb,RED); |
| 921 |
vec[1] = expval * colval(op->ol->lamb,GRN); |
| 922 |
vec[2] = expval * colval(op->ol->lamb,BLU); |
| 923 |
vec[3] = 1.; |
| 924 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
| 925 |
for (i = op->ol->nl; i--; ) { |
| 926 |
VCOPY(vec, op->ol->li[i].direc); |
| 927 |
vec[3] = 0.; |
| 928 |
glLightfv(glightid[i], GL_POSITION, vec); |
| 929 |
d = expval * op->ol->li[i].omega; |
| 930 |
vec[0] = d * colval(op->ol->li[i].val,RED); |
| 931 |
vec[1] = d * colval(op->ol->li[i].val,GRN); |
| 932 |
vec[2] = d * colval(op->ol->li[i].val,BLU); |
| 933 |
vec[3] = 1.; |
| 934 |
glLightfv(glightid[i], GL_SPECULAR, vec); |
| 935 |
glLightfv(glightid[i], GL_DIFFUSE, vec); |
| 936 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
| 937 |
glLightfv(glightid[i], GL_AMBIENT, vec); |
| 938 |
glEnable(glightid[i]); |
| 939 |
} |
| 940 |
} else { /* fake lighting */ |
| 941 |
vec[0] = vec[1] = vec[2] = 0.; vec[3] = 1.; |
| 942 |
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, vec); |
| 943 |
getdcent(v1, op); |
| 944 |
VSUB(v1, odev.v.vp, v1); |
| 945 |
if (normalize(v1) <= getdrad(op)) { |
| 946 |
vec[0] = -odev.v.vdir[0]; |
| 947 |
vec[1] = -odev.v.vdir[1]; |
| 948 |
vec[2] = -odev.v.vdir[2]; |
| 949 |
} else |
| 950 |
VCOPY(vec, v1); |
| 951 |
vec[3] = 0.; |
| 952 |
glLightfv(GL_LIGHT0, GL_POSITION, vec); |
| 953 |
vec[0] = vec[1] = vec[2] = .7; vec[3] = 1.; |
| 954 |
glLightfv(GL_LIGHT0, GL_SPECULAR, vec); |
| 955 |
glLightfv(GL_LIGHT0, GL_DIFFUSE, vec); |
| 956 |
vec[0] = vec[1] = vec[2] = .3; vec[3] = 1.; |
| 957 |
glLightfv(GL_LIGHT0, GL_AMBIENT, vec); |
| 958 |
glEnable(GL_LIGHT0); |
| 959 |
} |
| 960 |
/* set up object transform */ |
| 961 |
if (op->xfac) { |
| 962 |
if (!normalizing && op->xfb.f.sca < 1.-FTINY | |
| 963 |
op->xfb.f.sca > 1.+FTINY) |
| 964 |
glEnable(GL_NORMALIZE); |
| 965 |
glMatrixMode(GL_MODELVIEW); |
| 966 |
glPushMatrix(); |
| 967 |
/* matrix order works out to same */ |
| 968 |
#ifdef SMLFLT |
| 969 |
glMultMatrixf((GLfloat *)op->xfb.f.xfm); |
| 970 |
#else |
| 971 |
glMultMatrixd((GLdouble *)op->xfb.f.xfm); |
| 972 |
#endif |
| 973 |
} |
| 974 |
/* render the display list */ |
| 975 |
glCallList(op->listid); |
| 976 |
nrendered++; |
| 977 |
/* restore matrix */ |
| 978 |
if (op->xfac) { |
| 979 |
glMatrixMode(GL_MODELVIEW); |
| 980 |
glPopMatrix(); |
| 981 |
if (!normalizing) |
| 982 |
glDisable(GL_NORMALIZE); |
| 983 |
} |
| 984 |
/* restore lighting */ |
| 985 |
if (op->drawcode == DO_LIGHT && op->ol != NULL) |
| 986 |
for (i = op->ol->nl; i--; ) |
| 987 |
glDisable(glightid[i]); |
| 988 |
else |
| 989 |
glDisable(GL_LIGHT0); |
| 990 |
/* check errors */ |
| 991 |
} |
| 992 |
glPopAttrib(); /* restore rendering params */ |
| 993 |
rgl_checkerr("rendering objects in dobj_render"); |
| 994 |
return(nrendered); |
| 995 |
} |
