71     vector N, L, hit;  in shader()  local
106             VSUB(li->ctr, hit, L) /* find the light vector */  in shader()
109             Llen = sqrt(L.x * L.x + L.y * L.y + L.z * L.z) + EPSILON;  in shader()
111             L.x /= Llen; /* normalize the light direction vector */  in shader()
112             L.y /= Llen;  in shader()
113             L.z /= Llen;  in shader()
115             VDOT(inten, N, L) /* light intensity */  in shader()
126                 shadowray.d = L;  in shader()
141                         phongval = shade_phong(incident, &hit, &N, &L, obj->tex->phongexp);  in shader()
233 flt shade_phong(ray* incident, vector* hit, vector* N, vector* L, flt specpower) {  in shade_phong()  argument
239     VAdd(&V, L, &H);  in shade_phong()