Hatton, Richard G · London, Chapman & Hall ld. · leaf 250
at Solving Problems 215 it is at right angles to AB, which is vertical, and alsothat our picture-line is parallel to the horizon. To findthe eye and O.Y. we proceed as follows : We know thattwo reciprocal Y.P.s have their vanishing parallelsenclosing a right angle. We know that the right… … Fig. 161.—The proMem solved. horizon from one V.P. to the other as the diameterof a semicircle, we first bisect the distance, and thendescribe the semicircle. Somewhere upon this semi-circle the position of the eye wiU occur. If we didnot know the length of one of the receding sides, wecould not…
Perspective · Drawing
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