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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* raytrace.c - routines for tracing and shading rays. |
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* |
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* 8/7/85 |
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* External symbols declared in ray.h |
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*/ |
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#include "ray.h" |
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#include "copyright.h" |
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|
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#include "octree.h" |
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|
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#include "ray.h" |
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#include "source.h" |
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#include "otypes.h" |
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|
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#include "otspecial.h" |
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#include "random.h" |
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|
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#define MAXCSET ((MAXSET+1)*2-1) /* maximum check set size */ |
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|
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extern CUBE thescene; /* our scene */ |
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extern int maxdepth; /* maximum recursion depth */ |
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extern double minweight; /* minimum ray weight */ |
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extern int do_irrad; /* compute irradiance? */ |
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unsigned long raynum = 0; /* next unique ray number */ |
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unsigned long nrays = 0; /* number of calls to localhit */ |
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|
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long raynum = 0L; /* next unique ray number */ |
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long nrays = 0L; /* number of calls to localhit */ |
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|
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static FLOAT Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
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static RREAL Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
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OBJREC Lamb = { |
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OVOID, MAT_PLASTIC, "Lambertian", |
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{0, 5, NULL, Lambfa}, NULL, |
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}; /* a Lambertian surface */ |
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|
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#define MAXLOOP 128 /* modifier loop detection */ |
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OBJREC Aftplane; /* aft clipping plane object */ |
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|
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#define RAYHIT (-1) /* return value for intercepted ray */ |
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|
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static int raymove(FVECT pos, OBJECT *cxs, int dirf, RAY *r, CUBE *cu); |
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static int checkhit(RAY *r, CUBE *cu, OBJECT *cxs); |
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static void checkset(OBJECT *os, OBJECT *cs); |
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|
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rayorigin(r, ro, rt, rw) /* start new ray from old one */ |
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register RAY *r, *ro; |
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int rt; |
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double rw; |
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|
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extern int |
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rayorigin( /* start new ray from old one */ |
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RAY *r, |
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int rt, |
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const RAY *ro, |
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const COLOR rc |
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) |
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{ |
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double rw, re; |
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/* assign coefficient/weight */ |
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if (rc == NULL) { |
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rw = 1.0; |
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setcolor(r->rcoef, 1., 1., 1.); |
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} else { |
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rw = intens(rc); |
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if (rc != r->rcoef) |
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copycolor(r->rcoef, rc); |
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} |
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if ((r->parent = ro) == NULL) { /* primary ray */ |
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r->rlvl = 0; |
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r->rweight = rw; |
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r->rsrc = -1; |
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r->clipset = NULL; |
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r->revf = raytrace; |
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copycolor(r->cext, cextinction); |
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copycolor(r->albedo, salbedo); |
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r->gecc = seccg; |
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r->slights = NULL; |
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} else { /* spawned ray */ |
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if (ro->rot >= FHUGE) { |
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memset(r, 0, sizeof(RAY)); |
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return(-1); /* illegal continuation */ |
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} |
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r->rlvl = ro->rlvl; |
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if (rt & RAYREFL) { |
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r->rlvl++; |
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r->rsrc = -1; |
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r->clipset = ro->clipset; |
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r->rmax = 0.0; |
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} else { |
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r->rsrc = ro->rsrc; |
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r->clipset = ro->newcset; |
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r->rmax = ro->rmax <= FTINY ? 0.0 : ro->rmax - ro->rot; |
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} |
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r->revf = ro->revf; |
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r->rweight = ro->rweight * rw; |
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copycolor(r->cext, ro->cext); |
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copycolor(r->albedo, ro->albedo); |
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r->gecc = ro->gecc; |
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r->slights = ro->slights; |
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r->crtype = ro->crtype | (r->rtype = rt); |
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VCOPY(r->rorg, ro->rop); |
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r->rweight = ro->rweight * rw; |
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/* estimate extinction */ |
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re = colval(ro->cext,RED) < colval(ro->cext,GRN) ? |
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colval(ro->cext,RED) : colval(ro->cext,GRN); |
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if (colval(ro->cext,BLU) < re) re = colval(ro->cext,BLU); |
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re *= ro->rot; |
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if (re > .1) |
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r->rweight *= exp(-re); |
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} |
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rayclear(r); |
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if (maxdepth <= 0 && rc != NULL) { /* Russian roulette */ |
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if (minweight <= 0.0) |
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error(USER, "zero ray weight in Russian roulette"); |
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if (maxdepth < 0 && r->rlvl > -maxdepth) |
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return(-1); /* upper reflection limit */ |
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if (r->rweight >= minweight) |
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return(0); |
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if (frandom() < r->rweight/minweight) |
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return(-1); |
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rw = minweight/r->rweight; /* promote survivor */ |
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scalecolor(r->rcoef, rw); |
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r->rweight = minweight; |
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return(0); |
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} |
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return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
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} |
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|
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rayclear(r) /* clear a ray for (re)evaluation */ |
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register RAY *r; |
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extern void |
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rayclear( /* clear a ray for (re)evaluation */ |
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register RAY *r |
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) |
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{ |
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r->rno = raynum++; |
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r->newcset = r->clipset; |
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r->hitf = rayhit; |
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r->robj = OVOID; |
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r->ro = NULL; |
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r->rot = FHUGE; |
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r->rox = NULL; |
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r->rt = r->rot = FHUGE; |
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r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
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r->uv[0] = r->uv[1] = 0.0; |
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setcolor(r->pcol, 1.0, 1.0, 1.0); |
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setcolor(r->rcol, 0.0, 0.0, 0.0); |
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r->rt = 0.0; |
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} |
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|
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raytrace(r) /* trace a ray and compute its value */ |
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RAY *r; |
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extern void |
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raytrace( /* trace a ray and compute its value */ |
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RAY *r |
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) |
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{ |
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extern int (*trace)(); |
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|
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if (localhit(r, &thescene)) |
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raycont(r); |
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else if (sourcehit(r)) |
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rayshade(r, r->ro->omod); |
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raycont(r); /* hit local surface, evaluate */ |
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else if (r->ro == &Aftplane) { |
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r->ro = NULL; /* hit aft clipping plane */ |
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r->rot = FHUGE; |
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} else if (sourcehit(r)) |
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rayshade(r, r->ro->omod); /* distant source */ |
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|
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if (trace != NULL) |
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(*trace)(r); /* trace execution */ |
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|
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rayparticipate(r); /* for participating medium */ |
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} |
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raycont(r) /* check for clipped object and continue */ |
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register RAY *r; |
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extern void |
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raycont( /* check for clipped object and continue */ |
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register RAY *r |
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) |
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{ |
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if (r->clipset != NULL && inset(r->clipset, r->ro->omod)) |
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if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
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!rayshade(r, r->ro->omod)) |
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raytrans(r); |
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else |
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rayshade(r, r->ro->omod); |
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} |
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raytrans(r) /* transmit ray as is */ |
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register RAY *r; |
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extern void |
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raytrans( /* transmit ray as is */ |
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register RAY *r |
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) |
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{ |
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RAY tr; |
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|
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if (rayorigin(&tr, r, TRANS, 1.0) == 0) { |
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if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
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VCOPY(tr.rdir, r->rdir); |
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rayvalue(&tr); |
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copycolor(r->rcol, tr.rcol); |
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} |
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rayshade(r, mod) /* shade ray r with material mod */ |
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register RAY *r; |
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int mod; |
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extern int |
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rayshade( /* shade ray r with material mod */ |
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register RAY *r, |
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int mod |
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) |
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{ |
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static int depth = 0; |
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register OBJREC *m; |
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/* check for infinite loop */ |
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if (depth++ >= MAXLOOP) |
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objerror(r->ro, USER, "possible modifier loop"); |
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|
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r->rt = r->rot; /* set effective ray length */ |
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for ( ; mod != OVOID; mod = m->omod) { |
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m = objptr(mod); |
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} |
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******/ |
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/* hack for irradiance calculation */ |
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if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS))) { |
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if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
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m->otype != MAT_CLIP && |
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(ofun[m->otype].flags & (T_M|T_X))) { |
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if (irr_ignore(m->otype)) { |
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depth--; |
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raytrans(r); |
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return; |
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return(1); |
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} |
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if (!islight(m->otype)) |
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m = &Lamb; |
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} |
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(*ofun[m->otype].funp)(m, r); /* execute function */ |
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if (ismaterial(m->otype)) { /* materials call raytexture */ |
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depth--; |
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< |
return; /* we're done */ |
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} |
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if ((*ofun[m->otype].funp)(m, r)) |
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return(1); /* materials call raytexture() */ |
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} |
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objerror(r->ro, USER, "material not found"); |
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return(0); /* no material! */ |
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} |
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raytexture(r, mod) /* get material modifiers */ |
220 |
< |
RAY *r; |
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int mod; |
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extern void |
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> |
rayparticipate( /* compute ray medium participation */ |
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> |
register RAY *r |
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> |
) |
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{ |
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static int depth = 0; |
224 |
> |
COLOR ce, ca; |
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> |
double re, ge, be; |
226 |
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|
227 |
> |
if (intens(r->cext) <= 1./FHUGE) |
228 |
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return; /* no medium */ |
229 |
> |
re = r->rot*colval(r->cext,RED); |
230 |
> |
ge = r->rot*colval(r->cext,GRN); |
231 |
> |
be = r->rot*colval(r->cext,BLU); |
232 |
> |
if (r->crtype & SHADOW) { /* no scattering for sources */ |
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re *= 1. - colval(r->albedo,RED); |
234 |
> |
ge *= 1. - colval(r->albedo,GRN); |
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be *= 1. - colval(r->albedo,BLU); |
236 |
> |
} |
237 |
> |
setcolor(ce, re<=FTINY ? 1. : re>92. ? 0. : exp(-re), |
238 |
> |
ge<=FTINY ? 1. : ge>92. ? 0. : exp(-ge), |
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be<=FTINY ? 1. : be>92. ? 0. : exp(-be)); |
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multcolor(r->rcol, ce); /* path extinction */ |
241 |
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if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
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return; /* no scattering */ |
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> |
setcolor(ca, |
244 |
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colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
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colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
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colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
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> |
addcolor(r->rcol, ca); /* ambient in scattering */ |
248 |
> |
srcscatter(r); /* source in scattering */ |
249 |
> |
} |
250 |
> |
|
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|
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extern void |
253 |
> |
raytexture( /* get material modifiers */ |
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RAY *r, |
255 |
> |
OBJECT mod |
256 |
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) |
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{ |
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register OBJREC *m; |
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/* check for infinite loop */ |
172 |
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if (depth++ >= MAXLOOP) |
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objerror(r->ro, USER, "modifier loop"); |
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/* execute textures and patterns */ |
260 |
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for ( ; mod != OVOID; mod = m->omod) { |
261 |
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m = objptr(mod); |
262 |
< |
if (!istexture(m->otype)) { |
262 |
> |
/****** unnecessary test since modifier() is always called |
263 |
> |
if (!ismodifier(m->otype)) { |
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sprintf(errmsg, "illegal modifier \"%s\"", m->oname); |
265 |
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error(USER, errmsg); |
266 |
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} |
267 |
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(*ofun[m->otype].funp)(m, r); |
267 |
> |
******/ |
268 |
> |
if ((*ofun[m->otype].funp)(m, r)) { |
269 |
> |
sprintf(errmsg, "conflicting material \"%s\"", |
270 |
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m->oname); |
271 |
> |
objerror(r->ro, USER, errmsg); |
272 |
> |
} |
273 |
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} |
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depth--; /* end here */ |
274 |
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} |
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|
276 |
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|
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< |
raymixture(r, fore, back, coef) /* mix modifiers */ |
278 |
< |
register RAY *r; |
279 |
< |
OBJECT fore, back; |
280 |
< |
double coef; |
277 |
> |
extern int |
278 |
> |
raymixture( /* mix modifiers */ |
279 |
> |
register RAY *r, |
280 |
> |
OBJECT fore, |
281 |
> |
OBJECT back, |
282 |
> |
double coef |
283 |
> |
) |
284 |
|
{ |
285 |
< |
FVECT curpert, forepert, backpert; |
286 |
< |
COLOR curpcol, forepcol, backpcol; |
285 |
> |
RAY fr, br; |
286 |
> |
int foremat, backmat; |
287 |
|
register int i; |
288 |
< |
/* clip coefficient */ |
288 |
> |
/* bound coefficient */ |
289 |
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if (coef > 1.0) |
290 |
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coef = 1.0; |
291 |
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else if (coef < 0.0) |
292 |
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coef = 0.0; |
293 |
< |
/* save current mods */ |
294 |
< |
VCOPY(curpert, r->pert); |
295 |
< |
copycolor(curpcol, r->pcol); |
296 |
< |
/* compute new mods */ |
297 |
< |
/* foreground */ |
298 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
299 |
< |
setcolor(r->pcol, 1.0, 1.0, 1.0); |
300 |
< |
if (fore != OVOID && coef > FTINY) |
301 |
< |
raytexture(r, fore); |
302 |
< |
VCOPY(forepert, r->pert); |
303 |
< |
copycolor(forepcol, r->pcol); |
304 |
< |
/* background */ |
305 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
306 |
< |
setcolor(r->pcol, 1.0, 1.0, 1.0); |
307 |
< |
if (back != OVOID && coef < 1.0-FTINY) |
308 |
< |
raytexture(r, back); |
309 |
< |
VCOPY(backpert, r->pert); |
310 |
< |
copycolor(backpcol, r->pcol); |
218 |
< |
/* sum perturbations */ |
293 |
> |
/* compute foreground and background */ |
294 |
> |
foremat = backmat = 0; |
295 |
> |
/* foreground */ |
296 |
> |
fr = *r; |
297 |
> |
if (coef > FTINY) |
298 |
> |
foremat = rayshade(&fr, fore); |
299 |
> |
/* background */ |
300 |
> |
br = *r; |
301 |
> |
if (coef < 1.0-FTINY) |
302 |
> |
backmat = rayshade(&br, back); |
303 |
> |
/* check for transparency */ |
304 |
> |
if (backmat ^ foremat) { |
305 |
> |
if (backmat && coef > FTINY) |
306 |
> |
raytrans(&fr); |
307 |
> |
else if (foremat && coef < 1.0-FTINY) |
308 |
> |
raytrans(&br); |
309 |
> |
} |
310 |
> |
/* mix perturbations */ |
311 |
|
for (i = 0; i < 3; i++) |
312 |
< |
r->pert[i] = curpert[i] + coef*forepert[i] + |
313 |
< |
(1.0-coef)*backpert[i]; |
314 |
< |
/* multiply colors */ |
315 |
< |
setcolor(r->pcol, coef*colval(forepcol,RED) + |
316 |
< |
(1.0-coef)*colval(backpcol,RED), |
317 |
< |
coef*colval(forepcol,GRN) + |
318 |
< |
(1.0-coef)*colval(backpcol,GRN), |
319 |
< |
coef*colval(forepcol,BLU) + |
320 |
< |
(1.0-coef)*colval(backpcol,BLU)); |
321 |
< |
multcolor(r->pcol, curpcol); |
312 |
> |
r->pert[i] = coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
313 |
> |
/* mix pattern colors */ |
314 |
> |
scalecolor(fr.pcol, coef); |
315 |
> |
scalecolor(br.pcol, 1.0-coef); |
316 |
> |
copycolor(r->pcol, fr.pcol); |
317 |
> |
addcolor(r->pcol, br.pcol); |
318 |
> |
/* return value tells if material */ |
319 |
> |
if (!foremat & !backmat) |
320 |
> |
return(0); |
321 |
> |
/* mix returned ray values */ |
322 |
> |
scalecolor(fr.rcol, coef); |
323 |
> |
scalecolor(br.rcol, 1.0-coef); |
324 |
> |
copycolor(r->rcol, fr.rcol); |
325 |
> |
addcolor(r->rcol, br.rcol); |
326 |
> |
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
327 |
> |
return(1); |
328 |
|
} |
329 |
|
|
330 |
|
|
331 |
< |
double |
332 |
< |
raynormal(norm, r) /* compute perturbed normal for ray */ |
333 |
< |
FVECT norm; |
334 |
< |
register RAY *r; |
331 |
> |
extern double |
332 |
> |
raydist( /* compute (cumulative) ray distance */ |
333 |
> |
register const RAY *r, |
334 |
> |
register int flags |
335 |
> |
) |
336 |
|
{ |
337 |
+ |
double sum = 0.0; |
338 |
+ |
|
339 |
+ |
while (r != NULL && r->crtype&flags) { |
340 |
+ |
sum += r->rot; |
341 |
+ |
r = r->parent; |
342 |
+ |
} |
343 |
+ |
return(sum); |
344 |
+ |
} |
345 |
+ |
|
346 |
+ |
|
347 |
+ |
extern void |
348 |
+ |
raycontrib( /* compute (cumulative) ray contribution */ |
349 |
+ |
COLOR rc, |
350 |
+ |
const RAY *r, |
351 |
+ |
int flags |
352 |
+ |
) |
353 |
+ |
{ |
354 |
+ |
COLOR eext, ext1; |
355 |
+ |
|
356 |
+ |
setcolor(eext, 0., 0., 0.); |
357 |
+ |
setcolor(rc, 1., 1., 1.); |
358 |
+ |
|
359 |
+ |
while (r != NULL && r->crtype&flags) { |
360 |
+ |
multcolor(rc, r->rcoef); |
361 |
+ |
copycolor(ext1, r->cext); |
362 |
+ |
scalecolor(ext1, r->rot); |
363 |
+ |
addcolor(eext, ext1); |
364 |
+ |
r = r->parent; |
365 |
+ |
} |
366 |
+ |
if (intens(eext) > FTINY) { |
367 |
+ |
setcolor(ext1, exp(-colval(eext,RED)), |
368 |
+ |
exp(-colval(eext,GRN)), |
369 |
+ |
exp(-colval(eext,BLU))); |
370 |
+ |
multcolor(rc, ext1); |
371 |
+ |
} |
372 |
+ |
} |
373 |
+ |
|
374 |
+ |
|
375 |
+ |
extern double |
376 |
+ |
raynormal( /* compute perturbed normal for ray */ |
377 |
+ |
FVECT norm, |
378 |
+ |
register RAY *r |
379 |
+ |
) |
380 |
+ |
{ |
381 |
|
double newdot; |
382 |
|
register int i; |
383 |
|
|
408 |
|
} |
409 |
|
|
410 |
|
|
411 |
< |
newrayxf(r) /* get new tranformation matrix for ray */ |
412 |
< |
RAY *r; |
411 |
> |
extern void |
412 |
> |
newrayxf( /* get new tranformation matrix for ray */ |
413 |
> |
RAY *r |
414 |
> |
) |
415 |
|
{ |
416 |
|
static struct xfn { |
417 |
|
struct xfn *next; |
418 |
|
FULLXF xf; |
419 |
|
} xfseed = { &xfseed }, *xflast = &xfseed; |
420 |
|
register struct xfn *xp; |
421 |
< |
register RAY *rp; |
421 |
> |
register const RAY *rp; |
422 |
|
|
423 |
|
/* |
424 |
|
* Search for transform in circular list that |
429 |
|
if (rp->rox == &xp->xf) { /* xp in use */ |
430 |
|
xp = xp->next; /* move to next */ |
431 |
|
if (xp == xflast) { /* need new one */ |
432 |
< |
xp = (struct xfn *)bmalloc(sizeof(struct xfn)); |
432 |
> |
xp = (struct xfn *)malloc(sizeof(struct xfn)); |
433 |
|
if (xp == NULL) |
434 |
|
error(SYSTEM, |
435 |
|
"out of memory in newrayxf"); |
446 |
|
} |
447 |
|
|
448 |
|
|
449 |
< |
flipsurface(r) /* reverse surface orientation */ |
450 |
< |
register RAY *r; |
449 |
> |
extern void |
450 |
> |
flipsurface( /* reverse surface orientation */ |
451 |
> |
register RAY *r |
452 |
> |
) |
453 |
|
{ |
454 |
|
r->rod = -r->rod; |
455 |
|
r->ron[0] = -r->ron[0]; |
461 |
|
} |
462 |
|
|
463 |
|
|
464 |
< |
localhit(r, scene) /* check for hit in the octree */ |
465 |
< |
register RAY *r; |
466 |
< |
register CUBE *scene; |
464 |
> |
extern void |
465 |
> |
rayhit( /* standard ray hit test */ |
466 |
> |
OBJECT *oset, |
467 |
> |
RAY *r |
468 |
> |
) |
469 |
|
{ |
470 |
+ |
OBJREC *o; |
471 |
+ |
int i; |
472 |
+ |
|
473 |
+ |
for (i = oset[0]; i > 0; i--) { |
474 |
+ |
o = objptr(oset[i]); |
475 |
+ |
if ((*ofun[o->otype].funp)(o, r)) |
476 |
+ |
r->robj = oset[i]; |
477 |
+ |
} |
478 |
+ |
} |
479 |
+ |
|
480 |
+ |
|
481 |
+ |
extern int |
482 |
+ |
localhit( /* check for hit in the octree */ |
483 |
+ |
register RAY *r, |
484 |
+ |
register CUBE *scene |
485 |
+ |
) |
486 |
+ |
{ |
487 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
488 |
|
FVECT curpos; /* current cube position */ |
489 |
|
int sflags; /* sign flags */ |
494 |
|
sflags = 0; |
495 |
|
for (i = 0; i < 3; i++) { |
496 |
|
curpos[i] = r->rorg[i]; |
497 |
< |
if (r->rdir[i] > FTINY) |
497 |
> |
if (r->rdir[i] > 1e-7) |
498 |
|
sflags |= 1 << i; |
499 |
< |
else if (r->rdir[i] < -FTINY) |
499 |
> |
else if (r->rdir[i] < -1e-7) |
500 |
|
sflags |= 0x10 << i; |
501 |
|
} |
502 |
|
if (sflags == 0) |
503 |
|
error(CONSISTENCY, "zero ray direction in localhit"); |
504 |
+ |
/* start off assuming nothing hit */ |
505 |
+ |
if (r->rmax > FTINY) { /* except aft plane if one */ |
506 |
+ |
r->ro = &Aftplane; |
507 |
+ |
r->rot = r->rmax; |
508 |
+ |
for (i = 0; i < 3; i++) |
509 |
+ |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
510 |
+ |
} |
511 |
+ |
/* find global cube entrance point */ |
512 |
|
t = 0.0; |
513 |
|
if (!incube(scene, curpos)) { |
514 |
|
/* find distance to entry */ |
526 |
|
t = dt; /* farthest face is the one */ |
527 |
|
} |
528 |
|
t += FTINY; /* fudge to get inside cube */ |
529 |
+ |
if (t >= r->rot) /* clipped already */ |
530 |
+ |
return(0); |
531 |
|
/* advance position */ |
532 |
|
for (i = 0; i < 3; i++) |
533 |
|
curpos[i] += r->rdir[i]*t; |
536 |
|
return(0); |
537 |
|
} |
538 |
|
cxset[0] = 0; |
539 |
< |
return(raymove(curpos, cxset, sflags, r, scene) == RAYHIT); |
539 |
> |
raymove(curpos, cxset, sflags, r, scene); |
540 |
> |
return((r->ro != NULL) & (r->ro != &Aftplane)); |
541 |
|
} |
542 |
|
|
543 |
|
|
544 |
|
static int |
545 |
< |
raymove(pos, cxs, dirf, r, cu) /* check for hit as we move */ |
546 |
< |
FVECT pos; /* current position, modified herein */ |
547 |
< |
OBJECT *cxs; /* checked objects, modified by checkhit */ |
548 |
< |
int dirf; /* direction indicators to speed tests */ |
549 |
< |
register RAY *r; |
550 |
< |
register CUBE *cu; |
545 |
> |
raymove( /* check for hit as we move */ |
546 |
> |
FVECT pos, /* current position, modified herein */ |
547 |
> |
OBJECT *cxs, /* checked objects, modified by checkhit */ |
548 |
> |
int dirf, /* direction indicators to speed tests */ |
549 |
> |
register RAY *r, |
550 |
> |
register CUBE *cu |
551 |
> |
) |
552 |
|
{ |
553 |
|
int ax; |
554 |
|
double dt, t; |
593 |
|
} |
594 |
|
/*NOTREACHED*/ |
595 |
|
} |
596 |
< |
if (isfull(cu->cutree) && checkhit(r, cu, cxs)) |
596 |
> |
if (isfull(cu->cutree)) { |
597 |
> |
if (checkhit(r, cu, cxs)) |
598 |
> |
return(RAYHIT); |
599 |
> |
} else if (r->ro == &Aftplane && incube(cu, r->rop)) |
600 |
|
return(RAYHIT); |
601 |
|
/* advance to next cube */ |
602 |
|
if (dirf&0x11) { |
628 |
|
} |
629 |
|
|
630 |
|
|
631 |
< |
static |
632 |
< |
checkhit(r, cu, cxs) /* check for hit in full cube */ |
633 |
< |
register RAY *r; |
634 |
< |
CUBE *cu; |
635 |
< |
OBJECT *cxs; |
631 |
> |
static int |
632 |
> |
checkhit( /* check for hit in full cube */ |
633 |
> |
register RAY *r, |
634 |
> |
CUBE *cu, |
635 |
> |
OBJECT *cxs |
636 |
> |
) |
637 |
|
{ |
638 |
|
OBJECT oset[MAXSET+1]; |
457 |
– |
register OBJREC *o; |
458 |
– |
register int i; |
639 |
|
|
640 |
|
objset(oset, cu->cutree); |
641 |
< |
checkset(oset, cxs); /* eliminate double-checking */ |
642 |
< |
for (i = oset[0]; i > 0; i--) { |
643 |
< |
o = objptr(oset[i]); |
644 |
< |
(*ofun[o->otype].funp)(o, r); |
645 |
< |
} |
466 |
< |
if (r->ro == NULL) |
641 |
> |
checkset(oset, cxs); /* avoid double-checking */ |
642 |
> |
|
643 |
> |
(*r->hitf)(oset, r); /* test for hit in set */ |
644 |
> |
|
645 |
> |
if (r->robj == OVOID) |
646 |
|
return(0); /* no scores yet */ |
647 |
|
|
648 |
|
return(incube(cu, r->rop)); /* hit OK if in current cube */ |
649 |
|
} |
650 |
|
|
651 |
|
|
652 |
< |
static |
653 |
< |
checkset(os, cs) /* modify checked set and set to check */ |
654 |
< |
register OBJECT *os; /* os' = os - cs */ |
655 |
< |
register OBJECT *cs; /* cs' = cs + os */ |
652 |
> |
static void |
653 |
> |
checkset( /* modify checked set and set to check */ |
654 |
> |
register OBJECT *os, /* os' = os - cs */ |
655 |
> |
register OBJECT *cs /* cs' = cs + os */ |
656 |
> |
) |
657 |
|
{ |
658 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
659 |
|
register int i, j; |