Question

In perspective projection, all lines of sight start at a ________ point.

(a) double

(b) triple

(c) multiple

(d) single

I had been asked this question during an online interview.

My question comes from Perspective Projection topic in section Development of Surfaces, Isometric Projections, Perspective Projections & Transformation of Projections of Civil Engineering Drawing

Answer 1

Correct choice is (d) single

The best explanation: When the human eye looks at a scene, objects in the distance appear smaller than objects close by. Orthographic projection ignores this effect to allow the creation of to-scale drawings for construction and engineering.

Orthographic projections are a small set of transforms often used to show profile, detail or precise measurements of a three dimensional object. Common names for orthographic projections include plane, cross-section, bird’s-eye, and elevation.