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Orthographic Projections Orthographic Projections Parallel projection technique Projectors normal to projection plane Projection Plane Projector NOTE: CAD Systems typically use orthographic projection Orthographic Projection Categories Axonometric Three object faces visible No principal axes parallel/perpendicular to projection plane Multiview Only one object face visible One object face (i.e., two principal axes) parallel to projection plane Axonometric Projections Classed according to angles made by principal axes when projected onto projection plane Trimetric – no equal angles All principal axes foreshortened unequally Dimetric – two angles are equal Two principal axes are equally foreshortened Isometric – all angles equal (iso equal, metric measure) All principal axes foreshortened equally Axonometric Projection Classes ... - tailieumienphi.vn
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