Graphics Programs Reference
In-Depth Information
Figure20.5
Family Category And Parameters dialog box
The face-based template contains a generic extrusion that is used as a
reference for the host when the family is placed into a model. You can
change the size of the extrusion, but you cannot delete it. The extrusion is
necessary in order for your family geometry to know how to attach to its
model host. It also allows you to indicate how void extrusions cut their host.
Cut through a Link?
Families with a void designed to cut the host do not cut the face of an
object in a linked file. This does not affect light output when you're
using families with a light source as long as the light source is not inside
solid geometry within the fixture.
Face-hosted families also contain a reference-level plane at the face of the
placeholder extrusion. This face represents the face of a ceiling or wall host
when the family is placed into a model. The placeholder extrusion face is
locked to this reference plane and cannot be unlocked, so although you
can
