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/* Copyright (c) 1994 Regents of the University of California */ |
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/* Copyright (c) 1995 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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{0, 5, NULL, Lambfa}, NULL, |
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}; /* a Lambertian surface */ |
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static OBJREC Aftplane; /* aft clipping plane object */ |
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OBJREC Aftplane; /* aft clipping plane object */ |
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static int raymove(), checkset(), checkhit(); |
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{ |
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r->rno = raynum++; |
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r->newcset = r->clipset; |
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if (r->rmax > FTINY) { |
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r->ro = &Aftplane; |
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r->rot = r->rmax; |
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r->rop[0] = r->rorg[0] + r->rot*r->rdir[0]; |
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r->rop[1] = r->rorg[1] + r->rot*r->rdir[1]; |
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r->rop[2] = r->rorg[2] + r->rot*r->rdir[2]; |
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} else { |
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r->ro = NULL; |
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r->rot = FHUGE; |
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} |
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r->ro = NULL; |
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r->rot = FHUGE; |
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r->pert[0] = r->pert[1] = r->pert[2] = 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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if (rayorigin(&tr, r, TRANS, 1.0) == 0) { |
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VCOPY(tr.rdir, r->rdir); |
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if (r->rmax > FTINY) |
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tr.rmax = r->rmax - r->rot; |
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rayvalue(&tr); |
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copycolor(r->rcol, tr.rcol); |
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r->rt = r->rot + tr.rt; |
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error(USER, errmsg); |
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} |
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******/ |
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if ((*ofun[m->otype].funp)(m, r)) |
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objerror(r->ro, USER, "conflicting materials"); |
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if ((*ofun[m->otype].funp)(m, r)) { |
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sprintf(errmsg, "conflicting material \"%s\"", |
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m->oname); |
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objerror(r->ro, USER, errmsg); |
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} |
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} |
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depth--; /* end here */ |
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} |
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double |
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raydist(r, flags) /* compute (cumulative) ray distance */ |
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register RAY *r; |
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register int flags; |
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{ |
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double sum = 0.0; |
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|
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while (r != NULL && r->crtype&flags) { |
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sum += r->rot; |
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r = r->parent; |
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} |
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return(sum); |
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} |
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|
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|
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double |
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raynormal(norm, r) /* compute perturbed normal for ray */ |
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FVECT norm; |
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register RAY *r; |
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} |
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if (sflags == 0) |
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error(CONSISTENCY, "zero ray direction in localhit"); |
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/* start off assuming nothing hit */ |
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if (r->rmax > FTINY) { /* except aft plane if one */ |
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r->ro = &Aftplane; |
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r->rot = r->rmax; |
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for (i = 0; i < 3; i++) |
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r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
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} |
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/* find global cube entrance point */ |
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t = 0.0; |
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if (!incube(scene, curpos)) { |
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/* find distance to entry */ |
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t = dt; /* farthest face is the one */ |
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} |
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t += FTINY; /* fudge to get inside cube */ |
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if (t >= r->rot) /* clipped already */ |
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return(0); |
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/* advance position */ |
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for (i = 0; i < 3; i++) |
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curpos[i] += r->rdir[i]*t; |
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return(0); |
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} |
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cxset[0] = 0; |
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return(raymove(curpos, cxset, sflags, r, scene) == RAYHIT && |
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r->ro != &Aftplane); |
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raymove(curpos, cxset, sflags, r, scene); |
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return(r->ro != NULL & r->ro != &Aftplane); |
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} |
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} |
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/*NOTREACHED*/ |
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} |
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if (isfull(cu->cutree) && checkhit(r, cu, cxs)) |
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if (isfull(cu->cutree)) { |
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if (checkhit(r, cu, cxs)) |
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return(RAYHIT); |
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} else if (r->ro == &Aftplane && incube(cu, r->rop)) |
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return(RAYHIT); |
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/* advance to next cube */ |
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if (dirf&0x11) { |
