2013

Table Of Contents
Use three points to define the base. Use the 3P (Three Points) option
to define the base of the cylinder. You can set three points anywhere in
3D space.
Construct a cylindrical form with special detail, such as grooves.
Create a closed polyline (PLINE to represent a 2D profile of the base. Use
EXTRUDE to define the height along the Z axis. The resulting extruded
solid is not a true solid cylinder primitive.
Create a Solid Sphere
Create a solid sphere using one of several methods.
When you start with the center point, the central axis of the sphere parallels
the Z axis of the current user coordinate system (UCS).
Sphere Creation Options
Use the following options to draw a sphere with the SPHERE command:
Specify three points to set the size and plane of the
circumference or radius. Use the 3P (Three Points) option to define
the size of the sphere anywhere in 3D space. The three points also define
the plane of the circumference.
Specify two points to set the circumference or radius. Use the 2P
(Two Points) option to define the size of the sphere anywhere in 3D space.
The plane of the circumference matches the Z value of the first point.
Set the size and location of the sphere based on other objects.
Use the Ttr (Tangent, Tangent, Radius) option to define a sphere that is
tangent to two circles, arcs, lines, and some 3D objects. The tangency
points are projected onto the current UCS.
358 | Chapter 8 Work with 3D Models