87     flt tnear, tfar;  in box_intersect()  local
90     tfar = FHUGE;  in box_intersect()
106         if (tx2 < tfar)  in box_intersect()
107             tfar = tx2;  in box_intersect()
109     if (tnear > tfar)  in box_intersect()
111     if (tfar < 0.0)  in box_intersect()
128         if (ty2 < tfar)  in box_intersect()
129             tfar = ty2;  in box_intersect()
131     if (tnear > tfar)  in box_intersect()
133     if (tfar < 0.0)  in box_intersect()
150         if (tz2 < tfar)  in box_intersect()
151             tfar = tz2;  in box_intersect()
153     if (tnear > tfar)  in box_intersect()
155     if (tfar < 0.0)  in box_intersect()
159     add_intersection(tfar, (object *)bx, ry);  in box_intersect()