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Solid Modeling – Primitives and Boolean Operations
Solid Primitives
Primitives are simple solid objects created directly in a CAD system
Examples include: box, sphere, cylinder, cone, wedge, torus
Model Building in AutoCAD
In AutoCAD, the following dimensions are associated with the three coordinate axes:
Length in x axis direction Width in y axis direction Height in z axis direction
Length, width and height can be positive or negative
A positive dimension indicates movement in direction of positive axis
A negative dimension indicates movement in opposite, or negative direction
Solid Composites
Primitives combined using Boolean operations to create solid composites
Boolean operations used in solid modeling are:
Union Intersection Subtraction
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