Orthographic Projection of Points, Lines, Planes, And Solids
Orthographic Projections of Points, Lines, Planes, And Solids.
To draw a projection of any object, One must have the following information.
- Object 9( with its description, well defined. )
- Observer ( Always observing perpendicular to RESP. REF. PLANE. )
- Location of object ( Means it's position with reference to H.P. & V.P. )
- TERM ' ABOVE' & 'BELOW' WITH RESPECTIVELY TO H.P.
- AND TERMS 'INFRONT' & 'BEHIND' WITH RESPECTIVELY TO V.P
- FROM 4 QUADRANTS, OBJECT CAN BE PLACED IN ANY ONE OF THESE 4 QUADRANTS.
Notations...
The following notations should be followed while naming different views in orthographic projection.
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| Object | Point A | Line AB |
| It's top view | a | a b |
| It's front view | a' | a' b' |
| It's side view | a'' | a'' b'' |
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The same system of notations should be followed to increase numbers like 1,2,3 are used.
Quadrant pattern...
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[/su_column][/su_row]This quadrant pattern, If observed along XY Line ( in the red arrow direction ) Will exactly appear as shown on the right side and hence, it is further used to understand illustration properly.