Vanishing point as the "direction point", as lines having the same directional vector, say "D", will have the same vanishing point. Mathematically, let be a point lying on the image plane, where is the focal length (of the camera associated with the image), and let be the unit vector associated with , where . If we consider a straight line in space with the unit vector and its vanishing point , the unit vector associated with is equal to , assuming both are assumed to point towards the image plane. When the image plane is parallel to two world-coordinate axes, lines parallel
Horizon Lines Horizon Lines Horizon Lines, Inc. was an American domestic ocean shipping and logistics company headquartered in Charlotte, North Carolina. It was the largest Jones Act maritime shipping and logistics company and accounted for approximately 37% of all US container shipments linking the continental United States to Alaska, Hawaii and Puerto Rico. Under the Jones Act, maritime shipments between US ports is restricted to US-built, owned, and flagged vessels operated by predominantly US-citizen crews. The company originated from Sea-Land Service, Inc. The domestic liner operations of Sea-Land were sold in 2003 and thereafter operated under the name Horizon Lines. Horizon became