Autodesk 00128-051462-9310 User Guide - Page 1628

Geometry Types of Associative Spaces Associative spaces can be 2D spaces, extruded 3D spaces, or 3D freeform spaces. An associative 2D or extruded 3D space is associative only to the objects in the X and Y direction of the floor plan. The height is either 0 or a user-defined extrusion height. A 3D freeform space is associative to the objects bounding it in all 3 spatial dimensions. Spaces can be associative to a number of selected AEC objects, AutoCAD linework, and object outlines. For a listing of bounding objects for different geometry types, see "Bounding Objects for Associative 3D Freeform Spaces" on page 1588 and "Bounding Objects and Object Outlines for Associative 2D or Extruded 3D Spaces" on page 1593. External References A space can be associative to bounding objects in external references. If the bounding objects in the external reference change, the space in the host drawing changes, too. However, spaces that have been generated in an external reference do not interact with bounding objects in the host drawing. Associative Spaces and Bounding Objects You can disconnect an associative space from its bounding objects, so that it is not affected by future modifications to those objects. Similarly, you can select a previously non-associative space and associate it with a set of bounding objects you select. When you make a previously non-associative space associative to the bounding objects around it, the geometry of the space is changed to the shape of those objects. The base boundary of the space cannot be grip-edited anymore. When an associative space is disconnected from its bounding objects, it can be edited manually. If the surrounding objects change after the space is disconnected from them, the space will not update anymore. Associative Spaces and Boundary Offset Types Each space has 4 individual boundaries: base boundary, net boundary, usable boundary, and gross boundary. The offsets between the boundaries can be determined either by the space style or by manually grip-editing the boundaries. When you generate a space that is associative to bounding objects, the base boundary of the space is determined automatically from the geometry of the bounding objects; therefore, the base boundary of the space is not editable. If you define your offsets by style, the other boundaries are not directly editable either. If you define your offsets manually, you can edit the net boundary, usable boundary, and gross boundary independently from the base boundary. Bounding Objects for Associative 3D Freeform Spaces The following building objects can be selected as bounding objects for 3D freeform spaces: Object Wall Location of the generated space base boundary Near face of wall body (at base curve) If a wall that is set to not bound spaces intersects a wall that does bound spaces, and both are in the same cleanup group, the resulting space can be invalid and flow through the cleanup holes. If the walls are put on different cleanup groups, a valid space can be generated. Plan modifiers, body modifiers, interferences, sweeps, end caps, and opening end caps are included in the geometry of the generated space boundary. NOTE If a modifier creates a hole or gap through the wall, then the gap will be ignored when the placement of the space is determined. Curtain wall/Curtain wall unit Curtain wall body Interferences, roof line, floor line, and frame profiles are included in the geometry of the generated space boundary. NOTE Empty cells or holes created by a curtain wall modifier do not break up the curtain wall and invalidate the space generation. They are ignored and the space is generated as if the curtain wall was closed. 1588 | Chapter 36 Spaces