Autodesk 00128-051462-9310 User Guide - Page 1691

Subtracting spaces with manual boundary offsets 1 Create a space in which to create a hole. 2 Create a second, smaller space to be subtracted from the larger space. You can draw the second space within or overlapping the first space, or you can draw it in another location and then move it onto the larger space. Alternatively, you can select a closed polyline to subtract from the space. 3 Select the larger space, right-click, and click AEC Modify Tools ➤ Subtract. 4 Select the smaller space to subtract from the larger space. 5 Enter y (Yes) to erase the subtracted space, or n (No) to leave the space in the drawing. Creating Spaces from the Intersection of Other Spaces Use this procedure to create a new extruded 3D space from the overlapping portion of 2 intersecting extruded 3D spaces. You can choose whether to retain the original geometry after creating the new intersection space. When a space is created from 2 intersecting spaces, the following properties of the first selected space are applied to the resulting intersection space: ■ Name ■ Description ■ Layer ■ Style ■ Tag ■ Calculation Modifiers ■ Zone attachments ■ Space height ■ Floor thickness ■ Ceiling thickness ■ Height above ceiling ■ Height below floor ■ Default surface height ■ Justification ■ Boundary offset type ■ Rotation ■ Display properties Boolean Operations for Extruded 3D Spaces | 1651