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 59
his chapter. The line ah is receding to the right at an angle of 40 ; tlieline ac is receding to the left at an angle of 50: and Die line(Jc is at 90 with the picture plane. 36 COMPLETE PERSPECTIVE COURSE These angles are set off at the station point, from thedirecting line, and vanishing 2^?o//f/s… … Directing »- Line Fig. 37 picture plane, as shoAvn in Fig. 37; the direction of sight isperpendicular to the picture plane, as shown in Fig. 38, whichis a perspective view showing their relative position. Thevanishing parallel for ah (Fig. 38) is parallel to the line ah,and determines its V.P.; in…
Perspective
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