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 61
oone-fourth of j?.?. Where the lower edge of the drawing appears to cut theground plane is the position of the picture plane; in theillustration it appears to cut it at ^j. If the lower part of thedrawing were extended to r, the ground line of the pictureplane would be at /. As its distance from… … Fig. 3D object on our drawing, it will only alter the proportion betweenthe tracing of the object on the picture plane and its representa-tion on the drawing, e.(/. sd is one-third of sf, consequently theobject on the drawing will have this proportion to the imaginarytracing on the picture plane,…
Perspective
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