Oblique Projections, ContinuedCavalierprojectionsCavalier projections are oblique projections where the front axes are alwaysperpendicular to each other and the receding axis is drawn at any angle otherthan 90°. When the receding axis is drawn at an angle of 45° with the planeof projection, all edges are projected their true length. For this reason, mostcavalier drawings use the 45° angle. Cavalier projections originated in thedrawings of medieval fortifications and were made on the horizontal planesof projection. The central portions of these fortifications were higher thanthe rest and were called cavalier because of their commanding position.Figure 6-5 shows an oblique projection of a bookshelf drawn in full scalewith the receding axis at a 45° angle to the horizontal.Figure 6-5.—A cavalier projection.Continued on next page6-7
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