Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 121
re plane, a^ is its perspective. In Fig. 14, the point a is | below the plane of the horizoaand ^ in front of the picture plane, a^ is its perspective. 49. PROBLEM 11. Fig. 15. To find the perspective ofa line, the line being determined by its vertical and horizontalprojections. Let HPP and VH be… … tion of the Une, d^ and b^being the vertical projectionsof its extremities. Let theposition of the observers eyebe as indicated by SP^ andSP^. The perspective of thepoint a has been found byProblem I. at a^. The per-spective of the point b has been found by Problem I. at h^. Theline (A^), joining…
Architecture · Building
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