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L13 - Multiview Projections 1 Glass Box Theory GE101...

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    Multiview Projections 1 Glass Box Theory GE101 Engineering Graphics and Design
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    Some Characteristics Parallel projectors Projectors normal to  projection plane Object positioned  with one side  parallel to projection  plane Only one side visible   need more than one view  to describe object 
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    Glass Box Theory - 1 Mutually perpendicular  projection planes (sides of  glass box) Position object inside glass  box. PEB orthogonal to sides  of glass box Six principal views (front/back,  top/bottom, left/right) Frontal (F), Horizontal (H),  Profile (P) projection planes Object dimensions (width,  height, depth) Hinges – fold lines (H/F, F/P)
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    Glass Box Theory - 2 Images projected onto  the projection planes 
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    Glass Box Theory - 3 Sides of glass box  hinged (H/F, F/P) so  that when opened … 
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    Glass Box Theory - 4 the views are aligned  as shown here:
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    Glass Box Theory - 5 For many objects, three  views are sufficient
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    View Alignment/View Placement
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