Lange, David C. (David Christoph) · New York, John Wiley & sons, inc.; [etc., etc.] · leaf 105
Fig. 46 a«ba>^ \ c-d- v >N ro- N. \ /<A \^ \ /•• \,.r3 1 ; ; 1 1 1 a 11 1 o>1 rh,l> i 1 1^- 1 ,./,,-/, 1 ,jn. X 1 ah «:-. 1 /./ t y / >■ V Fig. 47 92 GENERAL METHODS … PRINCIPLES OF SHADES AND SHADOWS 93 tangency of the.shadow of one line with the hounding Hneof the shadow, the points in the shade-hne on the surfaceof the object which casts these points of shadow may bedetermined by passing back along each Ray of Lightthiough the point of tangency. A curved hne…
Shades and shadows · Geometry, Descriptive
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