. Perspective for art students . ought. It is the the suns this any linesare drawn from the topof the column to theprojecting edge, as fromA to B. Prom A a ver-tical is run down thecolumn, and from B aray is drawn to the suns rays. C is apoint in the shadow. The shadows on, from, and on to a sphere have to befound by means of sections of the sphere. The perspec-tiye representation of a sphere is itself properly foundby a series of sections. That is, a number of circles invertical planes, and having their centres coinciding andbeing all of the same size, are pu
. Perspective for art students . ought. It is the the suns this any linesare drawn from the topof the column to theprojecting edge, as fromA to B. Prom A a ver-tical is run down thecolumn, and from B aray is drawn to the suns rays. C is apoint in the shadow. The shadows on, from, and on to a sphere have to befound by means of sections of the sphere. The perspec-tiye representation of a sphere is itself properly foundby a series of sections. That is, a number of circles invertical planes, and having their centres coinciding andbeing all of the same size, are put into perspective, andthen the form of the sphere is drawn by freehand aroundthem. The shape produced is not a true circle, and doesnot command much admiration. The shadow on a sphere forms a circle just as a sectionof a sphere does. The circle separates the zone of lightfrom the zone of shadow, and is drawn in perspectiveprecisely in the same way as were the various circlesby which the spheres form was obtained if that process. FiQ. 125.—Shadow upon a colnmn. lyo Perspective has been adopted. This circular section will be per-pendicular to the rays of light. In Fig. 126 the circleis drawn, but the working is not shown. In that casethe of sun is down on the left, and planes per-pendicular to the rays will be oblique planes with passing through the two of perpendiculars— of perpendiculars to suns rays, and of per-pendiculars to direction of sun. The circle for theshadow would be found in the same way as the chess-board of Fig. 96, the centre of the sphere determiningthe position. Circles are not actually drawn in perspective, butare obtained by putting into perspective a frameworkof straight lines as in Fig. 150. In casting the shadowof a circle, then, one neglects the circles and finds theshadow of the lines as if they were the real object. Theobject, thus being in straight lines, is worked as inthe preceding paragraphs—^in fact, the working
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