Autodesk 00128-051462-9310 - AUTOCAD 2008 COMM UPG FRM 2005 DVD, User Manual

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Polyline and resulting wall modifier
Body Modifiers Created from 3D Objects
Body modifiers use the 3-dimensional (3D) geometry of an object, such as a mass element or a mass group, to add to,
subtract from, or completely replace one component in a wall. If the wall has only one component, the body modifier
applies to the entire wall. If the wall has multiple components, the modifier applies only to the component that you
specify.
Barrel Vault mass element and resulting body modifier subtracted from a wall
Interference Conditions Created from 3D Objects
Interference conditions use the geometry of 3D objects to create custom openings or cutouts in walls. You can specify
how the interference condition is applied to the wall: added to the wall, subtracted to the wall, or ignored.
Interference conditions apply to all wall components that the interfering object touches. The wall stops at the interference
condition. The way in which you apply the interference condition to the wall determines how the shrinkwrapping of
the wall is affected by the condition in plan view. In model views, the interference condition is always subtractive,
regardless of the shrinkwrapping option you selected.
When you edit the object that acts as the interference condition, the wall changes to accommodate the changes to the
geometry of the object. For example, you can move the interfering object to change its location on the wall.
A Cylinder mass element added as an additive interference condition
Working with Wall Sweeps
A wall sweep is a wall or a wall component whose shape is extruded horizontally from a profile that was created from
a closed polyline. The profile “sweeps” along the length of the wall to define the shape of the wall.
The height and the width of the polyline you use to create the profile define the height and the width of the wall
component.The profile is not scaled when swept on the wall. The insertion point of the profile becomes the lower-left
corner of the wall component.
After you create wall sweeps, you can miter wall sweeps that meet at a corner. You can also change how the sweep is
applied to the wall:
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You can edit the geometry that defines a sweep.
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You can assign a sweep profile to a different wall component.
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You can adjust the miter angles at each end of a wall that has a sweep profile.
■
You can remove a sweep profile from a wall or a wall component.
700 | Chapter 18 Walls