Complete perspective course : comprising the elementary and advanced stages of perspective, the projection of shadows and reflections, with exercises in theory and practice, also the practical application of perspective (1900)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan and co. · leaf 157
point, e.g. to measure a length of 3 on aline receding from the point a to its Y.P. (Fig, 102). Di-aw nd parallel to SV — the vanishing parallel for the ^ 134 COMPLETE PERSPECTIVE COURSE chap. receding line from a — and three times the length of rf (theperspective foot at the distance of a). Draw a… … Fig. 102 M.P., we shall find that its length will coincide with thatalready obtained, as shown. It is possible to determine the apparent length of a line inperspective by calculation only. We have shown in Fig. 92 theprinciple governing a point in perspective by similar triangles.On the same…
Perspective
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