SummaryReviewThis chapter acquaints you with the various types of parallel projections.There are vast differences between oblique and orthographic projections.Oblique projections, particularly isometric projections are the most widelyrecognized because of their unique angular relationship to the plane ofprojection. Orthographic projections are most closely associated withblueprints or working drawings used for all types of construction. Thechapter terminates with standard practices for rendering objects in parallelprojection.CommentsThe theory and study of parallel projections develop your ability to think orvisualize in three dimensions. Parallel projections are methodical, logical,mathematically correct representations of real objects or what could becomereal objects. Understanding parallel projections increases your ability tounderstand the mechanical interrelationship between parts from a wheelbearing on your automobile to the component parts of a Rubik’s cube.A suggestion for increasing your understanding of perspective and parallelprojections is to look at the projection chart in the beginning of this chapterto get an overall feel for the subject. Select only one block (type ofprojection) and study it until you understand it. Then, return to an overallstudy of projections to fully grasp the relationship between the different typesof projections.6-41
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