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Multiview Projection• Projection a view of an object• Is a photograph enough to describe
an object?• A number of views, systematically
arranged...
Third Angle Projection
Mitter Line
D/2D/2
D/2 D/2
A transparent picture plane is set up between object and the station point of an observer’s
eye.
T
F R
First Angle Projection (Europe & Asia)
Mitter Line
D/2D/2
D/2 D/2
The observer looks through the object to the planes of projection.
T
FR
Views of Surfaces
• To effectively create and interpret multiview projections, you have to consider the elements that make up most solids:
SURFACES bounded by straight lines, or curves.
Inclined Surface
Perpendicular to a
plane, but inclined or tipped to adjacent planes.
Edge vien on perp. Plane, fs view on inclined planes
Inclined Edge
True length in parallel plane
(angled)
Shortened on adjacent planes
(vertical / horizontal)
Meaning of a Line
Visible or hidden:•An edge (intersection between 2 surfaces)•Edge view of a surface•Limiting element of a curved surface
Hidden Lines
Dashed hidden lines are used to represent features that would be hidden behind other surfaces.
Order of Drawing
•Block out the views•Locate centerlines•Start details and arcs first•Draw dominant details•Check your views