Graphics Programs Reference
In-Depth Information
associate the extrusion to another plane, it is not a good idea. Doing so will
change only the thickness of the extrusion, which is not important.
To build a recessed lighting fixture, you want your extrusions to be inside
the placeholder extrusion. Although the fixture looks upside down in the
family file, it will have the correct orientation when hosted by a ceiling
or reference plane in your project file, because the placeholder extrusion
represents the host object when the family is used in a project. Surface-
or pendant-mounted lights should be modeled adjacent to the face of the
placeholder extrusion.
Face-hosted Families for Wall-mounted Lights
When creating a face-hosted family for a wall-mounted light fixture, you
need to treat the placeholder extrusion as though it were a wall. When
working in the Ref. Level plan view of the family, it is as though the wall
has been laid flat on the ground and you are looking down at it. It is easy to
assume that the distance from the edge of the placeholder extrusion to your
geometry will be the mounting height of the fixture. That is not the case (see
Figure 20.6
).
