Perspective and geometrical drawing adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thomas H. [from old catalog] · Toronto, W. Briggs; · leaf 98
greatest length.Again, if AB represent a line ofdefinite length, and O, the ob-server, the apparent length ofAB as seen from O will be AD.(Fig. 55.) This representation of a lineAB by AD, which is always lessthan AB, is called foreshorten-ing. KoTE.—AD is always perpen-dicular to the lonojest side… … Fig. 56. Here, the figure BX only, would be given, and it would beassumed to touch the picture plane. We first produce thevanishing lines DX and AC to meet in C.Y., then drawC.Y. S perpendicular to B.L., and make it equal to height ofspectator; then draw H.L. parallel to B.L. through C.Y.;next take…
Geometrical drawing · Perspective
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