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
The Point! inspiration for "The Point!": "I was on acid and I looked at the trees and I realized that they all came to points, and the little branches came to points, and the houses came to point. I thought, 'Oh! Everything has a point, and if it doesn't, then there's no point to it.' " The round-headed Oblio has had to wear a pointed hat since birth to conceal his "pointless" condition from his pointy-headed peers. However, Oblio is accepted in the town despite his nonconformity, until one day, when the son of an evil count is unwittingly dishonored by Oblio.