. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. alwaysequally distant from the eye ; he may, for the various pars of bis drawing, by opening or closing the com-passes, have their relative heiglits, widths, and positions, to be at once transferred to the drawing. Sect. II. PERSPECTIVE. 240,5. A perspective delineation is the linear representation of any object or , asit or they apjjcar to the eye, and is such a figure of an object as may he supposed to l)emade l)y a plane making a s
. An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth. alwaysequally distant from the eye ; he may, for the various pars of bis drawing, by opening or closing the com-passes, have their relative heiglits, widths, and positions, to be at once transferred to the drawing. Sect. II. PERSPECTIVE. 240,5. A perspective delineation is the linear representation of any object or , asit or they apjjcar to the eye, and is such a figure of an object as may he supposed to l)emade l)y a plane making a section of the body or pyramid of visual rays directed from theeye to tlie diHferent parts of the object. A delineation so made, being pro])erly colouredand shadowed, will conxney a lively idea of the real object, and at the same time indicate itsposition and distance from the eye of the observer. 2406. Definitions. — 1. An original object or objects is or are an object or number ofobjects projiosed to be delineated : for instance, a house, a ship, a man, or all or any ofthem together. In Jig. 829. the house ABCDFHK is the original Fig. 829. Original lines are any lines that are the boundaries of original objects, or of planesin those objects. The lines AB, BC, CD are original lines, being partly theboundaries of the original object ground plane is that upon which the objects to be drawn are placed, ftnd is il2 THEORY OF ARCIIITECTUIIE. Book II. always considered a boundless level plane. The ))lane X in the figure is the groundI)lane, u])on wliich is placed the object ABCDFHK. 4 The point of vinv or point of sifflit is the fixed place of the eye of the observer,viewing the object or objects to be delineated : E in the figure is such point. 5. The station point is a point on the ground jjlane, perpendicularly under the point ofsight or eye of the observer, and expresses on the ))lan the station whence the view istaken. S is the station point in the figure,
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