If the distance from the observer to the object is infinite, then the projection lines are assumed to be parallel, and the projection is called a parallel projection. As a result, the 3D object is transformed into a 2D view. The projection is produced by connecting the points where the lines of sight pierce the projection plane. A plane of projection (i.e., an image or picture plane) is an imaginary flat plane upon which the image is projected. All projection theory is based on two variables: line of sight (projecting lines) and plane of projection.Ī line of sight (LOS) is an imaginary line between an observer’s eye and an object. A three-dimensional object can be represented in a single plane, such as on a sheet of paper, using projecting lines and planes.
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