# | Line 49 | Line 49 | typedef struct ray { | |
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49 | FVECT pert; /* surface normal perturbation */ | |
50 | COLOR pcol; /* pattern color */ | |
51 | COLOR rcol; /* returned ray value */ | |
52 | + | double rt; /* returned effective ray length */ |
53 | } RAY; | |
54 | ||
55 | extern double raynormal(); |
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