Monday, April 11, 2011

Descriptive Geometry

Manipulating (rotating) picture planes (surfaces) in order to identify
  • True size
  • True shape
  • True length
  • True angle
  • Intersection points
  • Distances

True Length Lines
  • If a line is parallel toa fold line in 1 view, it is true length in the next view
    Point View
    • You must first find a true length line
    • Create a fold line perpindicular to the true length (TL) line
      True Size Surface
      • You must find TL of one line
      • Create fold line perpendicular to the TL line to get the edge view (EV) of the surface
      • Create fold line parallel to the edge view
        Addaline
        • Addaline allows you to skip a view when finding TL
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