Post on 18-Jan-2016
Orthographic Projection
“COPY”
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)
“COPY”
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."
“COPY”
• 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.
** Name these views: (6)
*This process is called orthographic ("true drawing")
projection.
“COPY”
*It also works in reverse: “Don’t 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.
Proper Blocking Format“Copy”
Top View
Front View
Side View
Line of Deflection
Isometric DrawingsOrthographic Projections
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 OP’s
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.