introduction of engineering graphics ,projection of points,lines,planes,solids,section of solids,development of surfaces,isometric projection,perspective projection
2. Orthographic projections
In orthographic projections, the principle views –
Front view, Top view, & Side views of an object are
drawn by the direct observation.
These views are drawn from the pictorial view of an
object. The pictorial view is a three dimensional
representation.
By observing pictorial view, it is very easy to visualize
the shape when the object is viewed from front, top &
sides.
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3. Orthographic Projection
Multi-view drawings provide the most accurate
description of 3D objects and structures for engineering,
manufacturing, and construction requirements
In engineering, there are two systems of projection:
First Angle Projection – Europe, Asia and former
European colonies in Africa and parts of Australia
Third Angle Projection – Used in the USA and
Canada, in Africa where American development is
taking place and parts of Australia
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7. Views What Seen
Front view Length and Height–(width not consider)
Top view Length and width–(Height not consider)
Side view Height and width–(Length not consider)
Arrangement of views
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