2004

Specify 3D Views Interactively (3D Orbit) | 151
Use 3D Orbit Commands
You can choose from several commands that control the 3D Orbit display,
projection, and visualization tools. You can access Pan and Zoom options
from the 3D Orbit shortcut menu or on the 3D Orbit toolbar. You can also
choose to use a perspective or a parallel projection of the view while
3DORBIT
is active.
Shade Objects in the 3D Orbit View
Objects in the 3D Orbit view can be shaded to give them a more realistic 3D
appearance. You can change the way objects are shaded using the different
shading modes, which are also accessible from the 3D Orbit shortcut menu.
Use Visual Aids in the 3D Orbit View
You can choose to display one or more of the visual aids (compass, grid, and
UCS icon) in the 3D Orbit view. A check mark is displayed next to the active
visual aid option(s). A visual aid that is active when you exit
3DORBIT remains
active in the view outside the 3D Orbit view unless
SHADEMODE is set to 2D
Wireframe.
■ Compass. Draws a sphere within the arcball composed of three lines rep-
resenting the X, Y, and Z axes.
■ Grid. Draws an array of lines on a plane parallel to the current X and Y
axes, perpendicular to the Z axis. You specify the height of the grid display
in the
ELEVATION system variable.
Before starting
3DORBIT, you can use the GRID command to set system
variables that control the grid display. The number of major grid lines cor-
responds to the value you set using the Grid Spacing option of
GRID,
which is stored in the
GRIDUNIT system variable. Ten horizontal lines and
ten vertical lines are drawn between major lines.