| 35 |
|
static void checkset(OBJECT *os, OBJECT *cs); |
| 36 |
|
|
| 37 |
|
|
| 38 |
< |
extern int |
| 38 |
> |
int |
| 39 |
|
rayorigin( /* start new ray from old one */ |
| 40 |
|
RAY *r, |
| 41 |
|
int rt, |
| 120 |
|
r->rweight = minweight; |
| 121 |
|
return(0); |
| 122 |
|
} |
| 123 |
< |
return(r->rlvl <= abs(maxdepth) && r->rweight >= minweight ? 0 : -1); |
| 123 |
> |
return(r->rweight >= minweight && r->rlvl <= abs(maxdepth) ? 0 : -1); |
| 124 |
|
} |
| 125 |
|
|
| 126 |
|
|
| 127 |
< |
extern void |
| 127 |
> |
void |
| 128 |
|
rayclear( /* clear a ray for (re)evaluation */ |
| 129 |
< |
register RAY *r |
| 129 |
> |
RAY *r |
| 130 |
|
) |
| 131 |
|
{ |
| 132 |
|
r->rno = raynum++; |
| 143 |
|
} |
| 144 |
|
|
| 145 |
|
|
| 146 |
< |
extern void |
| 146 |
> |
void |
| 147 |
|
raytrace( /* trace a ray and compute its value */ |
| 148 |
|
RAY *r |
| 149 |
|
) |
| 163 |
|
} |
| 164 |
|
|
| 165 |
|
|
| 166 |
< |
extern void |
| 166 |
> |
void |
| 167 |
|
raycont( /* check for clipped object and continue */ |
| 168 |
< |
register RAY *r |
| 168 |
> |
RAY *r |
| 169 |
|
) |
| 170 |
|
{ |
| 171 |
|
if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
| 174 |
|
} |
| 175 |
|
|
| 176 |
|
|
| 177 |
< |
extern void |
| 177 |
> |
void |
| 178 |
|
raytrans( /* transmit ray as is */ |
| 179 |
< |
register RAY *r |
| 179 |
> |
RAY *r |
| 180 |
|
) |
| 181 |
|
{ |
| 182 |
|
RAY tr; |
| 190 |
|
} |
| 191 |
|
|
| 192 |
|
|
| 193 |
< |
extern int |
| 193 |
> |
int |
| 194 |
|
rayshade( /* shade ray r with material mod */ |
| 195 |
< |
register RAY *r, |
| 195 |
> |
RAY *r, |
| 196 |
|
int mod |
| 197 |
|
) |
| 198 |
|
{ |
| 199 |
< |
register OBJREC *m; |
| 199 |
> |
OBJREC *m; |
| 200 |
|
|
| 201 |
|
r->rt = r->rot; /* set effective ray length */ |
| 202 |
|
for ( ; mod != OVOID; mod = m->omod) { |
| 225 |
|
} |
| 226 |
|
|
| 227 |
|
|
| 228 |
< |
extern void |
| 228 |
> |
void |
| 229 |
|
rayparticipate( /* compute ray medium participation */ |
| 230 |
< |
register RAY *r |
| 230 |
> |
RAY *r |
| 231 |
|
) |
| 232 |
|
{ |
| 233 |
|
COLOR ce, ca; |
| 258 |
|
} |
| 259 |
|
|
| 260 |
|
|
| 261 |
< |
extern void |
| 261 |
> |
void |
| 262 |
|
raytexture( /* get material modifiers */ |
| 263 |
|
RAY *r, |
| 264 |
|
OBJECT mod |
| 265 |
|
) |
| 266 |
|
{ |
| 267 |
< |
register OBJREC *m; |
| 267 |
> |
OBJREC *m; |
| 268 |
|
/* execute textures and patterns */ |
| 269 |
|
for ( ; mod != OVOID; mod = m->omod) { |
| 270 |
|
m = objptr(mod); |
| 283 |
|
} |
| 284 |
|
|
| 285 |
|
|
| 286 |
< |
extern int |
| 286 |
> |
int |
| 287 |
|
raymixture( /* mix modifiers */ |
| 288 |
< |
register RAY *r, |
| 288 |
> |
RAY *r, |
| 289 |
|
OBJECT fore, |
| 290 |
|
OBJECT back, |
| 291 |
|
double coef |
| 293 |
|
{ |
| 294 |
|
RAY fr, br; |
| 295 |
|
int foremat, backmat; |
| 296 |
< |
register int i; |
| 296 |
> |
int i; |
| 297 |
|
/* bound coefficient */ |
| 298 |
|
if (coef > 1.0) |
| 299 |
|
coef = 1.0; |
| 343 |
|
} |
| 344 |
|
|
| 345 |
|
|
| 346 |
< |
extern double |
| 346 |
> |
double |
| 347 |
|
raydist( /* compute (cumulative) ray distance */ |
| 348 |
< |
register const RAY *r, |
| 349 |
< |
register int flags |
| 348 |
> |
const RAY *r, |
| 349 |
> |
int flags |
| 350 |
|
) |
| 351 |
|
{ |
| 352 |
|
double sum = 0.0; |
| 359 |
|
} |
| 360 |
|
|
| 361 |
|
|
| 362 |
< |
extern void |
| 362 |
> |
void |
| 363 |
|
raycontrib( /* compute (cumulative) ray contribution */ |
| 364 |
< |
double rc[3], |
| 364 |
> |
RREAL rc[3], |
| 365 |
|
const RAY *r, |
| 366 |
|
int flags |
| 367 |
|
) |
| 385 |
|
} |
| 386 |
|
|
| 387 |
|
|
| 388 |
< |
extern double |
| 388 |
> |
double |
| 389 |
|
raynormal( /* compute perturbed normal for ray */ |
| 390 |
|
FVECT norm, |
| 391 |
< |
register RAY *r |
| 391 |
> |
RAY *r |
| 392 |
|
) |
| 393 |
|
{ |
| 394 |
|
double newdot; |
| 395 |
< |
register int i; |
| 395 |
> |
int i; |
| 396 |
|
|
| 397 |
|
/* The perturbation is added to the surface normal to obtain |
| 398 |
|
* the new normal. If the new normal would affect the surface |
| 421 |
|
} |
| 422 |
|
|
| 423 |
|
|
| 424 |
< |
extern void |
| 424 |
> |
void |
| 425 |
|
newrayxf( /* get new tranformation matrix for ray */ |
| 426 |
|
RAY *r |
| 427 |
|
) |
| 430 |
|
struct xfn *next; |
| 431 |
|
FULLXF xf; |
| 432 |
|
} xfseed = { &xfseed }, *xflast = &xfseed; |
| 433 |
< |
register struct xfn *xp; |
| 434 |
< |
register const RAY *rp; |
| 433 |
> |
struct xfn *xp; |
| 434 |
> |
const RAY *rp; |
| 435 |
|
|
| 436 |
|
/* |
| 437 |
|
* Search for transform in circular list that |
| 442 |
|
if (rp->rox == &xp->xf) { /* xp in use */ |
| 443 |
|
xp = xp->next; /* move to next */ |
| 444 |
|
if (xp == xflast) { /* need new one */ |
| 445 |
< |
xp = (struct xfn *)malloc(sizeof(struct xfn)); |
| 445 |
> |
xp = (struct xfn *)bmalloc(sizeof(struct xfn)); |
| 446 |
|
if (xp == NULL) |
| 447 |
|
error(SYSTEM, |
| 448 |
|
"out of memory in newrayxf"); |
| 459 |
|
} |
| 460 |
|
|
| 461 |
|
|
| 462 |
< |
extern void |
| 462 |
> |
void |
| 463 |
|
flipsurface( /* reverse surface orientation */ |
| 464 |
< |
register RAY *r |
| 464 |
> |
RAY *r |
| 465 |
|
) |
| 466 |
|
{ |
| 467 |
|
r->rod = -r->rod; |
| 474 |
|
} |
| 475 |
|
|
| 476 |
|
|
| 477 |
< |
extern void |
| 477 |
> |
void |
| 478 |
|
rayhit( /* standard ray hit test */ |
| 479 |
|
OBJECT *oset, |
| 480 |
|
RAY *r |
| 491 |
|
} |
| 492 |
|
|
| 493 |
|
|
| 494 |
< |
extern int |
| 494 |
> |
int |
| 495 |
|
localhit( /* check for hit in the octree */ |
| 496 |
< |
register RAY *r, |
| 497 |
< |
register CUBE *scene |
| 496 |
> |
RAY *r, |
| 497 |
> |
CUBE *scene |
| 498 |
|
) |
| 499 |
|
{ |
| 500 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
| 501 |
|
FVECT curpos; /* current cube position */ |
| 502 |
|
int sflags; /* sign flags */ |
| 503 |
|
double t, dt; |
| 504 |
< |
register int i; |
| 504 |
> |
int i; |
| 505 |
|
|
| 506 |
|
nrays++; /* increment trace counter */ |
| 507 |
|
sflags = 0; |
| 520 |
|
if (r->rmax > FTINY) { /* except aft plane if one */ |
| 521 |
|
r->ro = &Aftplane; |
| 522 |
|
r->rot = r->rmax; |
| 523 |
< |
for (i = 0; i < 3; i++) |
| 524 |
< |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
| 523 |
> |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
| 524 |
|
} |
| 525 |
|
/* find global cube entrance point */ |
| 526 |
|
t = 0.0; |
| 543 |
|
if (t >= r->rot) /* clipped already */ |
| 544 |
|
return(0); |
| 545 |
|
/* advance position */ |
| 546 |
< |
for (i = 0; i < 3; i++) |
| 548 |
< |
curpos[i] += r->rdir[i]*t; |
| 546 |
> |
VSUM(curpos, curpos, r->rdir, t); |
| 547 |
|
|
| 548 |
|
if (!incube(scene, curpos)) /* non-intersecting ray */ |
| 549 |
|
return(0); |
| 559 |
|
FVECT pos, /* current position, modified herein */ |
| 560 |
|
OBJECT *cxs, /* checked objects, modified by checkhit */ |
| 561 |
|
int dirf, /* direction indicators to speed tests */ |
| 562 |
< |
register RAY *r, |
| 563 |
< |
register CUBE *cu |
| 562 |
> |
RAY *r, |
| 563 |
> |
CUBE *cu |
| 564 |
|
) |
| 565 |
|
{ |
| 566 |
|
int ax; |
| 568 |
|
|
| 569 |
|
if (istree(cu->cutree)) { /* recurse on subcubes */ |
| 570 |
|
CUBE cukid; |
| 571 |
< |
register int br, sgn; |
| 571 |
> |
int br, sgn; |
| 572 |
|
|
| 573 |
|
cukid.cusize = cu->cusize * 0.5; /* find subcube */ |
| 574 |
|
VCOPY(cukid.cuorg, cu->cuorg); |
| 634 |
|
ax = 2; |
| 635 |
|
} |
| 636 |
|
} |
| 637 |
< |
pos[0] += r->rdir[0]*t; |
| 640 |
< |
pos[1] += r->rdir[1]*t; |
| 641 |
< |
pos[2] += r->rdir[2]*t; |
| 637 |
> |
VSUM(pos, pos, r->rdir, t); |
| 638 |
|
return(ax); |
| 639 |
|
} |
| 640 |
|
|
| 641 |
|
|
| 642 |
|
static int |
| 643 |
|
checkhit( /* check for hit in full cube */ |
| 644 |
< |
register RAY *r, |
| 644 |
> |
RAY *r, |
| 645 |
|
CUBE *cu, |
| 646 |
|
OBJECT *cxs |
| 647 |
|
) |
| 662 |
|
|
| 663 |
|
static void |
| 664 |
|
checkset( /* modify checked set and set to check */ |
| 665 |
< |
register OBJECT *os, /* os' = os - cs */ |
| 666 |
< |
register OBJECT *cs /* cs' = cs + os */ |
| 665 |
> |
OBJECT *os, /* os' = os - cs */ |
| 666 |
> |
OBJECT *cs /* cs' = cs + os */ |
| 667 |
|
) |
| 668 |
|
{ |
| 669 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
| 670 |
< |
register int i, j; |
| 670 |
> |
int i, j; |
| 671 |
|
int k; |
| 672 |
|
/* copy os in place, cset <- cs */ |
| 673 |
|
cset[0] = 0; |