Modern Perspective a Treatise Upon the Principles And Practice of Plane And Cyl
Modern Perspective a Treatise Upon the Principles And Practice of Plane And Cyl
William R William Robert Ware
The book Modern Perspective a Treatise Upon the Principles And Practice of Plane And Cyl was written by author William R William Robert Ware Here you can read free online of Modern Perspective a Treatise Upon the Principles And Practice of Plane And Cyl book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Modern Perspective a Treatise Upon the Principles And Practice of Plane And Cyl a good or bad book?
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Fig. 81 c shows how this may be done. The point in wliich the ray S' touches the ground is one point of the line of shadow, the ray S^' gives a second point, and the point where the line itself pierces the ground gives a third. Either two of these suffice to fix the line of shadow in position and direction. Fig-. 81 / shows that in the sunlight, also, shadows by Sunlight. we can in like manner determine a shadow by Fig. Si, / points, without using the vanishing-point. This is, whether in sunlig...ht or artificial light, the most convenient way of determining the shadow of a 204 MODERN PERSPECTIVE. curv^ed or irregular line. It amounts, virtually, as tlie fio'ure shows, to lettino- fall a i)erpeiidicular iroin eacJi point upon the plane in question, and drawing its shadow, and then passing a line of shadow through the extreme points thus obtained, as is done in Fig. 81 ^. 312. But a plane given by a line and a point can Fig 81, -/i. Be determined by a line drawn through the the ray pari poiiit parallel to the oiven line, as well as by allel to the ^ ^ ^ *^ given line.
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