Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 94
to the planes receiving the shadow. Let ahcdefgh be a solid, whose bounding planes areparallel or perpendicular to the planes receiving the shadows.(Figs. 43 and 44.) This is a problem which is quite common in architec-tural drawings, and in which a sufficient number of planesof an object are… … 84 SHADES AND SHADOWS OF SOLIDS av c^-qv qv aH W
Shades and shadows · Geometry, Descriptive
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