# | Line 685 | Line 685 | sample_origin(PARAMS *p, FVECT orig, const FVECT rdir, | |
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685 | /* special case for lone surface */ | |
686 | if (p->nsurfs == 1) { | |
687 | sp = p->slist; | |
688 | < | if (DOT(sp->snrm, rdir) >= -FTINY) { |
688 | > | if (DOT(sp->snrm, rdir) >= FTINY) { |
689 | fprintf(stderr, | |
690 | "%s: internal - sample behind sender '%s'\n", | |
691 | progname, sp->sname); |
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