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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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OBJREC Aftplane; /* aft clipping plane object */ |
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|
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static int raymove(), checkset(), checkhit(); |
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#define MAXLOOP 128 /* modifier loop detection */ |
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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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if (localhit(r, &thescene)) |
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gotmat = raycont(r); |
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else if (sourcehit(r)) |
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else if (r->ro == &Aftplane) { |
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r->ro = NULL; |
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r->rot = FHUGE; |
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} else if (sourcehit(r)) |
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gotmat = rayshade(r, r->ro->omod); |
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if (!gotmat) |
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if (r->ro != NULL && !gotmat) |
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objerror(r->ro, USER, "material not found"); |
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if (trace != NULL) |
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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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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 coef; |
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{ |
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RAY fr, br; |
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COLOR ctmp; |
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int foremat, backmat; |
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register int i; |
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/* clip coefficient */ |
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coef = 1.0; |
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else if (coef < 0.0) |
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coef = 0.0; |
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/* compute foreground and background */ |
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foremat = backmat = -1; |
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/* foreground */ |
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copystruct(&fr, r); |
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fr.pert[0] = fr.pert[1] = fr.pert[2] = 0.0; |
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setcolor(fr.pcol, 1.0, 1.0, 1.0); |
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setcolor(fr.rcol, 0.0, 0.0, 0.0); |
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if (fore != OVOID && coef > FTINY) |
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foremat = rayshade(&fr, fore); |
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else |
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foremat = 0; |
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/* background */ |
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copystruct(&br, r); |
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br.pert[0] = br.pert[1] = br.pert[2] = 0.0; |
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setcolor(br.pcol, 1.0, 1.0, 1.0); |
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setcolor(br.rcol, 0.0, 0.0, 0.0); |
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if (back != OVOID && coef < 1.0-FTINY) |
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backmat = rayshade(&br, back); |
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else |
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backmat = foremat; |
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/* check */ |
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if ((backmat==0) != (foremat==0)) |
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if (foremat < 0) |
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if (backmat < 0) |
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foremat = backmat = 0; |
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else |
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foremat = backmat; |
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else if (backmat < 0) |
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backmat = foremat; |
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if ((foremat==0) != (backmat==0)) |
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objerror(r->ro, USER, "mixing material with non-material"); |
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/* sum perturbations */ |
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/* mix perturbations */ |
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for (i = 0; i < 3; i++) |
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r->pert[i] += coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
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/* multiply pattern colors */ |
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r->pert[i] = coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
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/* mix pattern colors */ |
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scalecolor(fr.pcol, coef); |
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scalecolor(br.pcol, 1.0-coef); |
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copycolor(ctmp, fr.pcol); |
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addcolor(ctmp, br.pcol); |
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multcolor(r->pcol, ctmp); |
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/* sum returned ray values */ |
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scalecolor(fr.rcol, coef); |
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scalecolor(br.rcol, 1.0-coef); |
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addcolor(r->rcol, fr.rcol); |
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addcolor(r->rcol, br.rcol); |
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if (foremat) |
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copycolor(r->pcol, fr.pcol); |
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addcolor(r->pcol, br.pcol); |
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/* mix returned ray values */ |
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if (foremat) { |
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scalecolor(fr.rcol, coef); |
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scalecolor(br.rcol, 1.0-coef); |
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copycolor(r->rcol, fr.rcol); |
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addcolor(r->rcol, br.rcol); |
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r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
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} |
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/* return value tells if material */ |
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return(foremat); |
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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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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) { |