Hatton, Richard G · London, Chapman & Hall ld. · leaf 156
the wayin which A is related to the ground-plane. Suppose in Picture-lines continued 121 Fig. 83 A is kuown to be on the Gr.P., and in Fig. 84 itsdistance above it is known. The difference is seen when we draw the trace of theintersection of our obliging third plane; for if A is onthe ground, we… … Fig. 84.—Finding the P.L. of an obliquely ascending plane. from 4 we run up or down a vertical line, which will beparallel to our vertical V.L. through V.P.i and V.P. oftrace. We saw that the V.P. of trace was exactly underthe V.P. of AB. If now we draw a line from V.P.i throughB and A forward till…
Perspective · Drawing
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