Graphics Programs Reference
In-Depth Information
Figure 19.51
Display of the clearance extrusion in Visibility Graphics
You should always ask yourself the following question: “Just because I can
do it, does that mean I really should do it?” In the preceding example
showing you how to create a subcategory to control the visibility of the
clearance separately from the rest of the geometry, it may seem like a great
way to achieve what you need at the time. But as your library grows, you will
find it hard to manage those custom subcategories in individual families.
Havingastandardforwhentocreatethemandwhattonamethemcanhelp.
In addition, you should consider other available options. In this case, you
could assign the clearance to the Hidden Lines subcategory, which comes
with most 3D-based Revit family templates. You could also use the Visibility
parameter to control when it is turned on or off. Essentially, you can achieve
similar functionality by taking a different route.
Although having solid geometry in an equipment family to represent
clearance spaces is useful for interference coordination, you may not want
to have the solid geometry displayed in plan views. Model or symbolic lines
can be used to represent the clearance space for plan views. The visibility
of these lines can be controlled by a Yes/No type parameter or by a
subcategory.
Figure 19.52
shows clearance space lines in the Front elevation
view of the panel family. The lines exist in the Front elevation view so that
theywillbevisibleinplanviewswhenthepanelisattachedtoaverticalhost.
