2004

152 | Chapter 12 Specify a 3D View
When you zoom in and out of the 3D Orbit view, the number of grid lines
changes to give you a clear view of the lines. Fewer lines are drawn as you
zoom out. As you zoom in closer, more grid lines are drawn until the
number of lines corresponds again to the number set in
GRIDUNIT.
■ UCS Icon. Turns the display of the UCS icon on and off. If the UCS icon
is displayed when you start
3DORBIT, a shaded 3D UCS icon is displayed in
the 3D Orbit view. On the 3D UCS icon, the X axis is red, the Y axis is
green, and the Z axis is blue or cyan. The
UCSICON command also controls
the display of the 3D UCS icon.
Use Continuous Orbit
You can click and drag in the 3D Orbit view to start a continuous motion.
When you release the pick button on your pointing device, the orbit contin-
ues in the direction that you were dragging.
While Continuous Orbit is active, you can change the view by right-clicking
in the drawing area and choosing Projection, Shading Modes, Visual Aids,
Reset View, or Preset Views from the shortcut menu. You can also turn the
front and back clipping planes on and off while Continuous Orbit is active;
however, you cannot adjust the clipping planes. If you choose Pan, Zoom,
Orbit, or Adjust Clipping Planes from the shortcut menu, Continuous Orbit
ends.
Reset the View or Use Preset Views
While
3DORBIT is active, you can reset the view to the view that was current
when you first entered the 3D Orbit view.
You can set the view to one of the six standard orthogonal views, or one of
four isometric views. The isometric views are based on a camera location of
0,0,0.
Access 3D Orbit Commands from the Command Line
You cannot enter commands on the command line while
3DORBIT is active.
However, if
3DORBIT is not active, you can enter a command that starts
3DORBIT and activates one of the options at the same time. For example,
3DZOOM starts 3D Orbit view and activates the Zoom option. See 3DCLIP,
3DORBIT, 3DPAN, 3DDISTANCE, 3DSWIVEL,
and 3DZOOM in the Command Ref-
erence.
To start 3D Orbit view
1 Select the object or objects you want to view with
3DORBIT.
You can view your entire model by not selecting any objects. However,
viewing only selected objects enhances performance.