CGT 110 Lecture 2-1 Fall 2011

CGT 110 Lecture 2-1 Fall 2011 - height and length Top view...

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Lecture 2-1 Orthographic Projection
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Features of an object are projected along lines of sight to a plane of projection
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St. Jerome in his Cell Albrecht Durer
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Object orientation Orthographic, revolved, tilted Line of sight Parallel,converging (distance of point of view) Plane of projection perpendicular or oblique to the line of sight
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Perspective Pictorial Isometric and Oblique Multi-view
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Face of object normal to line of sight Plane of projection perpendicular to line of sight Primary views mutually perpendicular
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Top Front (central view) Right side
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Related views are aligned Front - top Front - right Top and right are aligned with miter line
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ANSI - Third angle Line of sight, projection plane, object ISO - First angle Line of sight, object, projection plane (side views appear reversed)
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Front view (usually central view) shows the most features or characteristics minimize hidden features
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Unformatted text preview: height and length Top view length and width Side view (Right) height and width left view (to the left) if fewer hidden features Three views may not be needed Normal (Principal) plane Surface true size, 2 edges (lines) Inclined plane 2 distorted surfaces, one edge Oblique plane 3 distorted surfaces Analyze Your Object Normal planes, Inclined plans, Oblique planes Parallel lines on a plane will be parallel in all views Changing the view will not change the number of sides on a plane Features must align in different views You will no need your sketch supplies until next week. Bring the Technical Drawing Text to Lab Web site up later this week with Syllabus and schedule. Read first three chapters of Technical Drawing Text....
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This note was uploaded on 02/19/2012 for the course CGT 101 taught by Professor Mohler,j during the Fall '08 term at Purdue University-West Lafayette.

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CGT 110 Lecture 2-1 Fall 2011 - height and length Top view...

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