Orthographic Projection

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Orthographic Projection
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Representational drawing and sketching

• Is concerned with "drawing what you see," or
  "drawing that which you imagine as if you
  actually saw it."
• (Sketch of garden shed)

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Technical drawing

• Is concerned with representing objects according
  to drawings that allow for
• Size, proportions, and structure - as well as
  appearance - to be shown.
• The most basic concept involved is the geometry
  of "projection."

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• An orthographic projection drawing - since it is
  a "flattened single view" of a (3-D) 3
  dimensional object - is an "exactly sized"
  representation of the real object on a 2
  dimensional surface (paper) AS SEEN IN THAT VIEW.

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Name these views (6)
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This process is called orthographic ("true
drawing") projection.
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It also works in reverse Dont copy

• a) If you correctly draw the individual views
• b) Fold them all up into a box with 90 degree
  corners
• c) Then project the corners of each drawing into
  the middle of the box the intersections of those
  lines will define the 3 dimensional object.

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Proper Blocking Format
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Isometric Drawings
Orthographic Projections
Top View
Line of Deflection
Side View
Front View
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Garden Sheds

• On a full size piece of white paper
• Reproduce a 3D Isometric Drawing
• Extract as much detail as possible
• Landscape included
• Draw the 3 OPs

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OP 1 - 10

• Use the 3D isometric object to produce the 3 OPs
  (top, front, side)
• Use the grid system to keep all sizes and
  proportions correct.