Fundamentals of Descriptive Geometry Part I 11

# Fundamentals of Descriptive Geometry Part I 11 -...

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Fundamentals of Descriptive  Geometry

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Descriptive Geometry  Methods Three basic descriptive methods: The direct view method The revolution method The folded line method
Direct View Method  Places the observer  at an infinite distance  from the object The observer’s line of  sight is perpendicular  to the geometry (i.e.  the objects main  features) in question

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The Revolution Method In this method, geometry,  such as a point, line, plane,  or entire object is revolved  about an axis until that  geometry is parallel to the  plane of projection that will  show the true shape of the  revolved geometry. This method is when a single  entity or simple geometry is  involved; if complex this  method gets confusing
Fold-line Method Very much like the glass  box we discussed earlier  in the semester The oblique face is  projected into an  auxiliary plane  that is  parallel to the face

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Fundamentals of Descriptive Geometry Part I 11 -...

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