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 Devil's Point easiest route is to follow the path leading up the Coire Odhar from Corrour Bothy, on the eastern side of the mountain. To reach the bothy requires a long walk in; the most usual route is to follow the Lairig Ghru from Linn of Dee, a distance of some . The Devil's Point is often climbed along with Cairn Toul. Sgòr an Lochain Uaine, which lies to the north of Cairn Toul is sometimes called "The Angel's Peak", in contrast to The Devil's Point. The Devil's Point The Devil's Point (Scottish Gaelic: Bod an Deamhain) is a mountain in the