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/* Copyright (c) 1991 Regents of the University of California */ |
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/* Copyright (c) 1994 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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{ |
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/* check if source ray */ |
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if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
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return; /* got the wrong guy */ |
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return(1); /* got the wrong guy */ |
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/* compute first projection */ |
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if (m->otype == MAT_DIRECT1 || |
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(r->rsrc < 0 || source[r->rsrc].sa.sv.pn == 0)) |
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if (m->otype == MAT_DIRECT2 && |
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(r->rsrc < 0 || source[r->rsrc].sa.sv.pn == 1)) |
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redirect(m, r, 1); |
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return(1); |
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} |
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nsdir[j] = sp->sloc[j] - r->rop[j]; |
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normalize(nsdir); |
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} |
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if (r->rox != NULL) |
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multv3(nsdir, nsdir, r->rox->b.xfm); |
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if (mf->b != &unitxf) |
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multv3(nsdir, nsdir, mf->b->xfm); |
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} else |
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nsdir[0] = nsdir[1] = nsdir[2] = 0.0; |
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varset("DxA", '=', nsdir[0]); |
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varset("DyA", '=', nsdir[1]); |
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varset("DzA", '=', nsdir[2]); |
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multv3(nsdir, nsdir, funcxf.xfm); |
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varset("DxA", '=', nsdir[0]/funcxf.sca); |
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varset("DyA", '=', nsdir[1]/funcxf.sca); |
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varset("DzA", '=', nsdir[2]/funcxf.sca); |
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} else { |
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varset("DxA", '=', 0.0); |
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varset("DyA", '=', 0.0); |
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varset("DzA", '=', 0.0); |
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} |
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/* compute coefficient */ |
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errno = 0; |
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va = mf->ep + 4*n; |
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olddot = DOT(tr.rdir, nv); |
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if (olddot <= FTINY && olddot >= -FTINY) |
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return(0); /* old dir parallels plane */ |
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tr.rmax = 0.0; |
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rayorigin(&tr, NULL, PRIMARY, 1.0); |
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if (!(*ofun[o->otype].funp)(o, &tr)) |
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return(0); /* no intersection! */ |
