calculating an illumination directed toward the eye point of the driver of {HEAD ~ the target vehicle} from {TAIL ~ the headlight} of the reference vehicle 
calculating an illumination directed toward the eye point of the driver of { HEAD ~ the target vehicle } from { TAIL ~ the headlight } of the reference vehicle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH