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The Hidden component cannot be defined by a material component. You can
only set it in the display properties of the 2D section. For information on
setting the display properties of a 2D section, see Creating a Hidden Line
Projection on page 3347.
Erased Component
The Erased component contains linework in the section object that you do
not want to see. For example, if you have a section of a multi-story building
in which you want to hide the lines between each floor, you can edit the
linework of the section and assign the floor lines to the Erased component.
Since the Erased component is turned off by default, the floor lines do not
display. For information on linework editing of a section, see Editing Linework
in a 2D Section on page 3253.
The Erased component is specific to 2D sections.
The Erased component cannot be defined by a material component.
Subdivision Components
The subdivision components partition a section object. They are useful to
create perspective effects, where parts closer to the viewer are drawn with
darker, stronger lines and parts which are farther from the user are drawn with
lighter, thinner lines. Subdivisions can have no individual material
assignments. However the display properties of the subdivisions can be used
for the surface hatching of the subdivisions by selecting “Use Subdivision
Properties for Surface Hatching” in the Other tab of the 2D section display
properties. For information on using the subdivision display properties to
display the section divisions, see Use Subdivision Properties and Materials in
2D Section Styles on page 3275.
Subdivisions are a display component of both 2D and 3D section objects.
The subdivision components are either controlled by the 2D Section/Elevation
Linework component of the material or by the 3D Body component of a
material. For information how to switch between these component
assignments, see Use the 3D Body Component of a Material for the 2D Section
Linework on page 3275.
3274 | Chapter 40 Sections
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