Orthographic Projections, ContinuedAxonometricprojectionsIn axonometric projections, the observer is located at infinity and the visualrays are parallel to each other and perpendicular to the plane of projection.A key feature of axonometric projections is that the object is inclined towardthe plane of projection showing all three surfaces in one view. Since theprincipal edges and surfaces of the object are inclined toward the plane ofprojection, the length of the lines, sizes of the angles, and proportions of theobject varies according to the amount of angle between the object and theplane of projection. The greater the angle to the plane of projection, thegreater the amount of required foreshortening. The three edges that intersectnearest the location of the observer are known as the axonometric axes (O).Axonometric projections are further classified as isometric projections,dimetric projections, and trimetric projections.Figure 6-13 shows an axonometric projection.Figure 6-13.—An axonometric projection.Continued on next page6-16
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