Lines Matching refs:N
162 void box_normal(box *bx, vector *pnt, ray *incident, vector *N) { in box_normal() argument
170 VSub((vector *)pnt, &c, N); in box_normal()
171 b = (*N); in box_normal()
173 a.x = fabs(N->x); in box_normal()
174 a.y = fabs(N->y); in box_normal()
175 a.z = fabs(N->z); in box_normal()
177 N->x = 0.0; in box_normal()
178 N->y = 0.0; in box_normal()
179 N->z = 0.0; in box_normal()
184 N->x = b.x; in box_normal()
187 N->y = b.y; in box_normal()
190 N->z = b.z; in box_normal()
192 VNorm(N); in box_normal()