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
Parallel Lines Parallel Lines Parallel Lines is the third studio album by American rock band Blondie. It was released on September 23, 1978, by Chrysalis Records to international commercial success. The album reached No. 1 in the United Kingdom in February 1979 and proved to be the band's commercial breakthrough in the United States, where it reached No. 6 in April 1979. In "Billboard" magazine, "Parallel Lines" was listed at No. 9 in the top pop albums year-end chart of 1979. As of 2008, the album had sold over 20 million copies worldwide. The album spawned several successful singles, notably the international