| 14 |
|
|
| 15 |
|
#include "octree.h" |
| 16 |
|
|
| 17 |
– |
#include "source.h" |
| 18 |
– |
|
| 17 |
|
#include "otypes.h" |
| 18 |
|
|
| 19 |
< |
#include "cone.h" |
| 19 |
> |
#include "source.h" |
| 20 |
|
|
| 23 |
– |
#include "face.h" |
| 24 |
– |
|
| 21 |
|
#include "random.h" |
| 22 |
|
|
| 23 |
+ |
/* |
| 24 |
+ |
* Structures used by direct() |
| 25 |
+ |
*/ |
| 26 |
|
|
| 27 |
< |
extern double dstrsrc; /* source distribution amount */ |
| 28 |
< |
extern double shadthresh; /* relative shadow threshold */ |
| 29 |
< |
extern double shadcert; /* shadow testing certainty */ |
| 27 |
> |
typedef struct { |
| 28 |
> |
FVECT dir; /* source direction */ |
| 29 |
> |
COLOR coef; /* material coefficient */ |
| 30 |
> |
COLOR val; /* contribution */ |
| 31 |
> |
} CONTRIB; /* direct contribution */ |
| 32 |
|
|
| 33 |
< |
SRCREC *source = NULL; /* our list of sources */ |
| 34 |
< |
int nsources = 0; /* the number of sources */ |
| 33 |
> |
typedef struct { |
| 34 |
> |
int sno; /* source number */ |
| 35 |
> |
float brt; /* brightness (for comparison) */ |
| 36 |
> |
} CNTPTR; /* contribution pointer */ |
| 37 |
|
|
| 38 |
|
static CONTRIB *srccnt; /* source contributions in direct() */ |
| 39 |
|
static CNTPTR *cntord; /* source ordering in direct() */ |
| 43 |
|
{ |
| 44 |
|
int i; |
| 45 |
|
register OBJREC *o, *m; |
| 46 |
< |
register SRCREC *ns; |
| 47 |
< |
|
| 46 |
> |
register int ns; |
| 47 |
> |
/* initialize dispatch table */ |
| 48 |
> |
initstypes(); |
| 49 |
> |
/* find direct sources */ |
| 50 |
|
for (i = 0; i < nobjects; i++) { |
| 51 |
|
|
| 52 |
|
o = objptr(i); |
| 53 |
|
|
| 54 |
< |
if (o->omod == OVOID) |
| 54 |
> |
if (!issurface(o->otype) || o->omod == OVOID) |
| 55 |
|
continue; |
| 56 |
|
|
| 57 |
|
m = objptr(o->omod); |
| 68 |
|
m->oargs.farg[3] <= FTINY) |
| 69 |
|
continue; /* don't bother */ |
| 70 |
|
|
| 71 |
< |
if ((ns = newsource()) == NULL) |
| 71 |
> |
if (sfun[o->otype].of == NULL || |
| 72 |
> |
sfun[o->otype].of->setsrc == NULL) |
| 73 |
> |
objerror(o, USER, "illegal material"); |
| 74 |
> |
|
| 75 |
> |
if ((ns = newsource()) < 0) |
| 76 |
|
goto memerr; |
| 77 |
|
|
| 78 |
< |
setsource(ns, o); |
| 78 |
> |
setsource(&source[ns], o); |
| 79 |
|
|
| 80 |
|
if (m->otype == MAT_GLOW) { |
| 81 |
< |
ns->sflags |= SPROX; |
| 82 |
< |
ns->sl.prox = m->oargs.farg[3]; |
| 81 |
> |
source[ns].sflags |= SPROX; |
| 82 |
> |
source[ns].sl.prox = m->oargs.farg[3]; |
| 83 |
|
if (o->otype == OBJ_SOURCE) |
| 84 |
< |
ns->sflags |= SSKIP; |
| 84 |
> |
source[ns].sflags |= SSKIP; |
| 85 |
|
} else if (m->otype == MAT_SPOT) { |
| 86 |
< |
ns->sflags |= SSPOT; |
| 87 |
< |
if ((ns->sl.s = makespot(m)) == NULL) |
| 86 |
> |
source[ns].sflags |= SSPOT; |
| 87 |
> |
if ((source[ns].sl.s = makespot(m)) == NULL) |
| 88 |
|
goto memerr; |
| 89 |
+ |
if (source[ns].sflags & SFLAT && |
| 90 |
+ |
!checkspot(source[ns].sl.s,source[ns].snorm)) { |
| 91 |
+ |
objerror(o, WARNING, |
| 92 |
+ |
"invalid spotlight direction"); |
| 93 |
+ |
source[ns].sflags |= SSKIP; |
| 94 |
+ |
} |
| 95 |
|
} |
| 96 |
|
} |
| 97 |
|
if (nsources <= 0) { |
| 101 |
|
markvirtuals(); /* find and add virtual sources */ |
| 102 |
|
srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB)); |
| 103 |
|
cntord = (CNTPTR *)malloc(nsources*sizeof(CNTPTR)); |
| 104 |
< |
if (srccnt != NULL && cntord != NULL) |
| 104 |
> |
if (srccnt == NULL || cntord == NULL) |
| 105 |
|
goto memerr; |
| 106 |
|
return; |
| 107 |
|
memerr: |
| 109 |
|
} |
| 110 |
|
|
| 111 |
|
|
| 97 |
– |
SRCREC * |
| 98 |
– |
newsource() /* allocate new source in our array */ |
| 99 |
– |
{ |
| 100 |
– |
if (nsources == 0) |
| 101 |
– |
source = (SRCREC *)malloc(sizeof(SRCREC)); |
| 102 |
– |
else |
| 103 |
– |
source = (SRCREC *)realloc((char *)source, |
| 104 |
– |
(unsigned)(nsources+1)*sizeof(SRCREC)); |
| 105 |
– |
if (source == NULL) |
| 106 |
– |
return(NULL); |
| 107 |
– |
source[nsources].sflags = 0; |
| 108 |
– |
source[nsources].nhits = 1; |
| 109 |
– |
source[nsources].ntests = 2; /* initial hit probability = 1/2 */ |
| 110 |
– |
return(&source[nsources++]); |
| 111 |
– |
} |
| 112 |
– |
|
| 113 |
– |
|
| 114 |
– |
setsource(src, so) /* add a source to the array */ |
| 115 |
– |
register SRCREC *src; |
| 116 |
– |
register OBJREC *so; |
| 117 |
– |
{ |
| 118 |
– |
double cos(), tan(), sqrt(); |
| 119 |
– |
double theta; |
| 120 |
– |
FACE *f; |
| 121 |
– |
CONE *co; |
| 122 |
– |
int j; |
| 123 |
– |
register int i; |
| 124 |
– |
|
| 125 |
– |
src->sa.success = 2*AIMREQT-1; /* bitch on second failure */ |
| 126 |
– |
src->so = so; |
| 127 |
– |
|
| 128 |
– |
switch (so->otype) { |
| 129 |
– |
case OBJ_SOURCE: |
| 130 |
– |
if (so->oargs.nfargs != 4) |
| 131 |
– |
objerror(so, USER, "bad arguments"); |
| 132 |
– |
src->sflags |= SDISTANT; |
| 133 |
– |
VCOPY(src->sloc, so->oargs.farg); |
| 134 |
– |
if (normalize(src->sloc) == 0.0) |
| 135 |
– |
objerror(so, USER, "zero direction"); |
| 136 |
– |
theta = PI/180.0/2.0 * so->oargs.farg[3]; |
| 137 |
– |
if (theta <= FTINY) |
| 138 |
– |
objerror(so, USER, "zero size"); |
| 139 |
– |
src->ss = theta >= PI/4 ? 1.0 : tan(theta); |
| 140 |
– |
src->ss2 = 2.0*PI * (1.0 - cos(theta)); |
| 141 |
– |
break; |
| 142 |
– |
case OBJ_SPHERE: |
| 143 |
– |
VCOPY(src->sloc, so->oargs.farg); |
| 144 |
– |
src->ss = so->oargs.farg[3]; |
| 145 |
– |
src->ss2 = PI * src->ss * src->ss; |
| 146 |
– |
break; |
| 147 |
– |
case OBJ_FACE: |
| 148 |
– |
/* get the face */ |
| 149 |
– |
f = getface(so); |
| 150 |
– |
/* find the center */ |
| 151 |
– |
for (j = 0; j < 3; j++) { |
| 152 |
– |
src->sloc[j] = 0.0; |
| 153 |
– |
for (i = 0; i < f->nv; i++) |
| 154 |
– |
src->sloc[j] += VERTEX(f,i)[j]; |
| 155 |
– |
src->sloc[j] /= (double)f->nv; |
| 156 |
– |
} |
| 157 |
– |
if (!inface(src->sloc, f)) |
| 158 |
– |
objerror(so, USER, "cannot hit center"); |
| 159 |
– |
src->sflags |= SFLAT; |
| 160 |
– |
VCOPY(src->snorm, f->norm); |
| 161 |
– |
src->ss = sqrt(f->area / PI); |
| 162 |
– |
src->ss2 = f->area; |
| 163 |
– |
break; |
| 164 |
– |
case OBJ_RING: |
| 165 |
– |
/* get the ring */ |
| 166 |
– |
co = getcone(so, 0); |
| 167 |
– |
VCOPY(src->sloc, CO_P0(co)); |
| 168 |
– |
if (CO_R0(co) > 0.0) |
| 169 |
– |
objerror(so, USER, "cannot hit center"); |
| 170 |
– |
src->sflags |= SFLAT; |
| 171 |
– |
VCOPY(src->snorm, co->ad); |
| 172 |
– |
src->ss = CO_R1(co); |
| 173 |
– |
src->ss2 = PI * src->ss * src->ss; |
| 174 |
– |
break; |
| 175 |
– |
default: |
| 176 |
– |
objerror(so, USER, "illegal material"); |
| 177 |
– |
} |
| 178 |
– |
} |
| 179 |
– |
|
| 180 |
– |
|
| 181 |
– |
SPOT * |
| 182 |
– |
makespot(m) /* make a spotlight */ |
| 183 |
– |
register OBJREC *m; |
| 184 |
– |
{ |
| 185 |
– |
extern double cos(); |
| 186 |
– |
register SPOT *ns; |
| 187 |
– |
|
| 188 |
– |
if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
| 189 |
– |
return(NULL); |
| 190 |
– |
ns->siz = 2.0*PI * (1.0 - cos(PI/180.0/2.0 * m->oargs.farg[3])); |
| 191 |
– |
VCOPY(ns->aim, m->oargs.farg+4); |
| 192 |
– |
if ((ns->flen = normalize(ns->aim)) == 0.0) |
| 193 |
– |
objerror(m, USER, "zero focus vector"); |
| 194 |
– |
return(ns); |
| 195 |
– |
} |
| 196 |
– |
|
| 197 |
– |
|
| 112 |
|
double |
| 113 |
|
srcray(sr, r, sn) /* send a ray to a source, return domega */ |
| 114 |
|
register RAY *sr; /* returned source ray */ |
| 196 |
|
} |
| 197 |
|
|
| 198 |
|
|
| 199 |
< |
sourcehit(r) /* check to see if ray hit distant source */ |
| 200 |
< |
register RAY *r; |
| 199 |
> |
srcvalue(r) /* punch ray to source and compute value */ |
| 200 |
> |
RAY *r; |
| 201 |
|
{ |
| 202 |
< |
int first, last; |
| 289 |
< |
register int i; |
| 202 |
> |
register SRCREC *sp; |
| 203 |
|
|
| 204 |
< |
if (r->rsrc >= 0) { /* check only one if aimed */ |
| 205 |
< |
first = last = r->rsrc; |
| 206 |
< |
} else { /* otherwise check all */ |
| 207 |
< |
first = 0; last = nsources-1; |
| 204 |
> |
sp = &source[r->rsrc]; |
| 205 |
> |
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
| 206 |
> |
/* check intersection */ |
| 207 |
> |
if (!(*ofun[sp->so->otype].funp)(sp->so, r)) |
| 208 |
> |
return; |
| 209 |
> |
raycont(r); /* compute contribution */ |
| 210 |
> |
return; |
| 211 |
|
} |
| 212 |
< |
for (i = first; i <= last; i++) |
| 213 |
< |
if (source[i].sflags & SDISTANT) |
| 214 |
< |
/* |
| 215 |
< |
* Check to see if ray is within |
| 216 |
< |
* solid angle of source. |
| 217 |
< |
*/ |
| 218 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
| 303 |
< |
<= source[i].ss2) { |
| 304 |
< |
r->ro = source[i].so; |
| 305 |
< |
if (!(source[i].sflags & SSKIP)) |
| 306 |
< |
break; |
| 307 |
< |
} |
| 308 |
< |
|
| 309 |
< |
if (r->ro != NULL) { |
| 310 |
< |
for (i = 0; i < 3; i++) |
| 311 |
< |
r->ron[i] = -r->rdir[i]; |
| 312 |
< |
r->rod = 1.0; |
| 313 |
< |
r->rox = NULL; |
| 314 |
< |
return(1); |
| 212 |
> |
/* compute intersection */ |
| 213 |
> |
if (sp->sflags & SDISTANT ? sourcehit(r) : |
| 214 |
> |
(*ofun[sp->so->otype].funp)(sp->so, r)) { |
| 215 |
> |
if (sp->sa.success >= 0) |
| 216 |
> |
sp->sa.success++; |
| 217 |
> |
raycont(r); /* compute contribution */ |
| 218 |
> |
return; |
| 219 |
|
} |
| 220 |
< |
return(0); |
| 220 |
> |
if (sp->sa.success < 0) |
| 221 |
> |
return; /* bitched already */ |
| 222 |
> |
sp->sa.success -= AIMREQT; |
| 223 |
> |
if (sp->sa.success >= 0) |
| 224 |
> |
return; /* leniency */ |
| 225 |
> |
sprintf(errmsg, "aiming failure for light source \"%s\"", |
| 226 |
> |
sp->so->oname); |
| 227 |
> |
error(WARNING, errmsg); /* issue warning */ |
| 228 |
|
} |
| 229 |
|
|
| 230 |
|
|
| 249 |
|
register int sn; |
| 250 |
|
int nshadcheck, ncnts; |
| 251 |
|
int nhits; |
| 252 |
< |
double prob, ourthresh, hwt; |
| 252 |
> |
double dom, prob, ourthresh, hwt; |
| 253 |
|
RAY sr; |
| 254 |
|
/* NOTE: srccnt and cntord global so no recursion */ |
| 255 |
|
if (nsources <= 0) |
| 263 |
|
cntord[sn].sno = sn; |
| 264 |
|
cntord[sn].brt = 0.0; |
| 265 |
|
/* get source ray */ |
| 266 |
< |
if ((srccnt[sn].dom = srcray(&sr, r, sn)) == 0.0) |
| 266 |
> |
if ((dom = srcray(&sr, r, sn)) == 0.0) |
| 267 |
|
continue; |
| 268 |
|
VCOPY(srccnt[sn].dir, sr.rdir); |
| 269 |
|
/* compute coefficient */ |
| 270 |
< |
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
| 271 |
< |
cntord[sn].brt = bright(srccnt[sn].val); |
| 270 |
> |
(*f)(srccnt[sn].coef, p, srccnt[sn].dir, dom); |
| 271 |
> |
cntord[sn].brt = bright(srccnt[sn].coef); |
| 272 |
|
if (cntord[sn].brt <= 0.0) |
| 273 |
|
continue; |
| 274 |
< |
/* compute contribution */ |
| 275 |
< |
srcvalue(&sr); |
| 276 |
< |
multcolor(srccnt[sn].val, sr.rcol); |
| 274 |
> |
/* compute potential */ |
| 275 |
> |
sr.revf = srcvalue; |
| 276 |
> |
rayvalue(&sr); |
| 277 |
> |
copycolor(srccnt[sn].val, sr.rcol); |
| 278 |
> |
multcolor(srccnt[sn].val, srccnt[sn].coef); |
| 279 |
|
cntord[sn].brt = bright(srccnt[sn].val); |
| 280 |
|
} |
| 281 |
|
/* sort contributions */ |
| 316 |
|
raycont(&sr); |
| 317 |
|
if (bright(sr.rcol) <= FTINY) |
| 318 |
|
continue; /* missed! */ |
| 319 |
< |
(*f)(srccnt[cntord[sn].sno].val, p, |
| 320 |
< |
srccnt[cntord[sn].sno].dir, |
| 321 |
< |
srccnt[cntord[sn].sno].dom); |
| 409 |
< |
multcolor(srccnt[cntord[sn].sno].val, sr.rcol); |
| 319 |
> |
copycolor(srccnt[cntord[sn].sno].val, sr.rcol); |
| 320 |
> |
multcolor(srccnt[cntord[sn].sno].val, |
| 321 |
> |
srccnt[cntord[sn].sno].coef); |
| 322 |
|
} |
| 323 |
|
/* add contribution if hit */ |
| 324 |
|
addcolor(r->rcol, srccnt[cntord[sn].sno].val); |
| 341 |
|
(double)source[cntord[sn].sno].ntests; |
| 342 |
|
scalecolor(srccnt[cntord[sn].sno].val, prob); |
| 343 |
|
addcolor(r->rcol, srccnt[cntord[sn].sno].val); |
| 432 |
– |
} |
| 433 |
– |
} |
| 434 |
– |
|
| 435 |
– |
|
| 436 |
– |
srcvalue(r) /* punch ray to source and compute value */ |
| 437 |
– |
RAY *r; |
| 438 |
– |
{ |
| 439 |
– |
register SRCREC *sp; |
| 440 |
– |
|
| 441 |
– |
sp = &source[r->rsrc]; |
| 442 |
– |
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
| 443 |
– |
RAY nr; |
| 444 |
– |
/* check intersection */ |
| 445 |
– |
if (!(*ofun[sp->so->otype].funp)(sp->so, r)) |
| 446 |
– |
return; |
| 447 |
– |
/* relay ray to source */ |
| 448 |
– |
vsrcrelay(&nr, r); |
| 449 |
– |
srcvalue(&nr); |
| 450 |
– |
return; |
| 451 |
– |
} |
| 452 |
– |
/* compute intersection */ |
| 453 |
– |
if (sp->sflags & SDISTANT ? sourcehit(r) : |
| 454 |
– |
(*ofun[sp->so->otype].funp)(sp->so, r)) { |
| 455 |
– |
if (sp->sa.success >= 0) |
| 456 |
– |
sp->sa.success++; |
| 457 |
– |
raycont(r); /* compute contribution */ |
| 458 |
– |
return; |
| 459 |
– |
} |
| 460 |
– |
if (sp->sa.success < 0) |
| 461 |
– |
return; /* bitched already */ |
| 462 |
– |
sp->sa.success -= AIMREQT; |
| 463 |
– |
if (sp->sa.success >= 0) |
| 464 |
– |
return; /* leniency */ |
| 465 |
– |
sprintf(errmsg, "aiming failure for light source \"%s\"", |
| 466 |
– |
sp->so->oname); |
| 467 |
– |
error(WARNING, errmsg); /* issue warning */ |
| 468 |
– |
} |
| 469 |
– |
|
| 470 |
– |
|
| 471 |
– |
#define wrongsource(m, r) (m->otype!=MAT_ILLUM && \ |
| 472 |
– |
r->rsrc>=0 && \ |
| 473 |
– |
source[r->rsrc].so!=r->ro) |
| 474 |
– |
|
| 475 |
– |
#define badambient(m, r) ((r->crtype&(AMBIENT|SHADOW))==AMBIENT && \ |
| 476 |
– |
!(m->otype==MAT_GLOW&&r->rot>m->oargs.farg[3])) |
| 477 |
– |
|
| 478 |
– |
#define passillum(m, r) (m->otype==MAT_ILLUM && \ |
| 479 |
– |
!(r->rsrc>=0&&source[r->rsrc].so==r->ro)) |
| 480 |
– |
|
| 481 |
– |
|
| 482 |
– |
m_light(m, r) /* ray hit a light source */ |
| 483 |
– |
register OBJREC *m; |
| 484 |
– |
register RAY *r; |
| 485 |
– |
{ |
| 486 |
– |
/* check for over-counting */ |
| 487 |
– |
if (wrongsource(m, r) || badambient(m, r)) |
| 488 |
– |
return; |
| 489 |
– |
/* check for passed illum */ |
| 490 |
– |
if (passillum(m, r)) { |
| 491 |
– |
|
| 492 |
– |
if (m->oargs.nsargs < 1 || !strcmp(m->oargs.sarg[0], VOIDID)) |
| 493 |
– |
raytrans(r); |
| 494 |
– |
else |
| 495 |
– |
rayshade(r, modifier(m->oargs.sarg[0])); |
| 496 |
– |
|
| 497 |
– |
/* otherwise treat as source */ |
| 498 |
– |
} else { |
| 499 |
– |
/* check for behind */ |
| 500 |
– |
if (r->rod < 0.0) |
| 501 |
– |
return; |
| 502 |
– |
/* get distribution pattern */ |
| 503 |
– |
raytexture(r, m->omod); |
| 504 |
– |
/* get source color */ |
| 505 |
– |
setcolor(r->rcol, m->oargs.farg[0], |
| 506 |
– |
m->oargs.farg[1], |
| 507 |
– |
m->oargs.farg[2]); |
| 508 |
– |
/* modify value */ |
| 509 |
– |
multcolor(r->rcol, r->pcol); |
| 344 |
|
} |
| 345 |
|
} |
