2004

Create 3D Objects | 309
The RECTANG or PLINE command creates a rectangle or closed polyline from
which you can create a box using
EXTRUDE. The 3D command creates a box
shape defined by surfaces only.
Create a Solid Cone
You can use
CONE to create a solid cone defined by a circular or an elliptical
base tapering to a point perpendicular to its base. By default, the cone’s base
lies on the XY plane of the current UCS. The height, which can be positive
or negative, is parallel to the Z axis. The apex determines the height and
orientation of the cone.
To create a truncated cone or a cone that requires a specific angle to define
its sides, draw a 2D circle and then use
EXTRUDE to taper the circle at an angle
along the Z axis. To complete the truncation, you can subtract a box from the
tip of the cone with the
SUBTRACT command. CIRCLE creates a circle from
which you can create a cone using
EXTRUDE with its Taper option. The 3D
command creates a conical shape defined by surfaces only.
Create a Solid Cylinder
You can use
CYLINDER to create a solid cylinder with a circular or an elliptical
base. The base of the cylinder lies on the XY plane of the current UCS.
If you want to construct a cylinder with special detail, such as grooves along
its sides, create a 2D profile of its base with a closed
PLINE and use EXTRUDE
to define its height along the Z axis.
CIRCLE creates a circle from which you
can create a cylinder using
EXTRUDE.
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