# | Line 241 | Line 241 | register RAY *r; | |
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241 | v[1] = r->rorg[1] - vp[1]; | |
242 | v[2] = r->rorg[2] - vp[2]; | |
243 | vp = source[si->sn].snorm; | |
244 | < | if (DOT(v,vp) <= FTINY) { /* behind source */ |
244 | > | if (DOT(v,vp) <= 0.) { /* behind source */ |
245 | si->np = 0; | |
246 | return; | |
247 | } |
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