Perspective and geometrical drawing : adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thos. H. (Thomas H.) · Toronto, Ont. : W. Briggs · leaf 18
appear to vanish at the same point directly in front ofus, hence the rule : Lines parallel to the line of direction vnll vanish at thecentre of vision. (Fig. 3.) Thus, let C be centre of vision, and AA, BB the ends ofparallel lines : they will all meet at 0, and all the lines drawnfrom C to AB will… … Parallel lines drawn between vanishing lines are of equallength, and, conversely, the lines joining the extremities ofequal parallel lines will vanish to a point. Hl Fiff. 4. HL ——7 T V / t T n A BL 0 Again, if the spectator stood on the ground at O, where thepicture plane rests, and looked towards…
Geometrical drawing · Perspective
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