The chapter outlines the most common approaches for generating 3D computer models, in addition to how these models are viewed and modified on the computer. A particular focus is put on constraint-based modeling and its relationship to documentation, analysis, and manufacturing technologies.
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Solid Modeling Swept Solids
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Swept Solids
Solid primitives can also be created by:
an existing twodimensional closed
object
The closed twodimensional objects are
called closed profiles
All primitives can be created with a
sweeping operation
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Extruded Solids
An extrusion is a:
Manufacturing process that involves forcing
a material through a shaped opening
Modeling process that creates a 3D shape
by translating a 2D profile along a linear
path
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AutoCAD Extrusions
To create an extruded solid in AutoCAD:
Create a close polyline in xy plane of current
UCS
Extrude polyline in z direction of current UCS
NOTE: AutoCAD command EXTRUDE
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Revolved Solids
A revolution is a modeling process that creates a 3D shape by revolving a 2D profile along a circular path
NOTE: AutoCAD command REVOLVE
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Sweeps
A swept solid is created by moving a 2D
profile along a path
NOTE: In AutoCAD, a sweep is created via the EXTRUDE command, using the Path option
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Solid Modeling Swept Solids
Hasta la vista!