Perspective, or, The art of drawing what one sees : explained and adapted to the use of those sketching from nature (1872)
Collins, W. H. (William Henry) · London : Longmans, Green · leaf 51
33 DISTANCE OF THE EYE. angle. The point e', found by describing a semi¬ circle on V v', and marking the intersection with the perpendicular drawn from c gives us the distance of the eye from the picture, viz. e' c. Fig. 16. … The describing of the semicircle is merely a con¬ trivance by which (due to the properties of the semi¬ circle) the angle v' e' y is insured as a right angle. Each house, then, that happens to be drawn in a picture fixes the position of the eye of the observer, and if the artist should introduce a…
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
