Рет қаралды 16,971
Perspective projection or perspective drawing is the representation of an object on a plane surface, called the picture plane, as it would appear to the eye, when viewed from a fixed position.
It may also be defined as the figure formed on the picture plane when visual rays from the eye to the object cut the picture plane. Perspective is mainly used in architecture. By means of perspective, the architect is able to show how an object would appear when constructed.
It is essential to have full knowledge of the principles of orthographic projections (third -angle method) before the theory of perspective drawing can be studied.
Principle of perspective projection:--
In the perspective projection, the eye is assumed to e situated at a definite position relative to the object. The vertical plane, which (in perspective) is called the picture plane, is placed between the object and the eye.
Visual rays from the eye to the object converge to a point in the eye and are, therefore, inclined to the picture plane. The rays pierce the picture plane and form an image on it. This image is the perspective of the object.
gmail : arghazanfar@gmail.com
twitter : / archgali
reddit.com : / arghazi
instagram : choudharyghazanfar