2011

Table Of Contents
PERSPECTIVE
Specifies whether the current viewport displays a perspective view.
POINTCLOUDDENSITY
Controls the number of points displayed at once for all point clouds in the
drawing view.
Work with Custom and Proxy Objects
Custom objects provide additional capabilities to the program and related
products. When the application that created the custom object is not available,
a proxy object is substituted in its place.
A custom object is a type of object created by an ObjectARX
®
(AutoCAD
Run-Time Extension) application, which typically has more specialized
capabilities than standard AutoCAD LT objects. Custom objects include
parametric solids (AutoCAD
®
Mechanical), intelligently interactive door
symbols (AutoCAD
®
Architecture), polygon objects (AutoCAD
®
Map 3D), and
associative dimension objects (AutoCAD and AutoCAD LT).
In addition to Autodesk, many software vendors use ObjectARX to write
programs that create graphical and nongraphical custom objects that are useful
in their AutoCAD based applications.
Proxy Objects
A proxy object is a substitute for a custom object when the ObjectARX
application that created the custom object is not available to AutoCAD LT or
other host applications. Later, when the application is available, the proxy
object is replaced by the custom object.
Proxy objects have significantly reduced capabilities compared to their
corresponding custom objects. The extent to which proxy objects can be edited
is determined by the parent ObjectARX application. For example, operations
such as erasing and moving an object, or changing object properties, may or
may not be possible on a proxy object, depending on the application that
created it.
When you open a drawing, you might see a Proxy Information dialog box.
The dialog box tells you the total number of proxy objects in the drawing
(both graphical and nongraphical) and the name of the missing application
and provides additional information about the proxy object type and display
state. You can use the dialog box to control the display of proxy objects.
1308 | Chapter 33 Work with Data in Other Formats