Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 467
ht coming from thesame source or direction are in-tercepted by a solid, the partfacing the light is illuminated,while the part turned from thelight is in shade. The divisionbetween these two parts is called the line of separation, e.g. the line cah (Fig. 249) is the line of separation between the… … Yis.. 249. Pkoblem 200. To determine the shadow and line of separation of a given rightvertical cone, the direction of light being given. Fig. 250. Let B and B be the plan and elevation of the cone, and Eand E the projections of the given ray. Draw a line from the vertex a parallel to E till it…
Geometrical drawing
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