Interval
To create one or several intervals for a 1D geometry:
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Right-click the Geometry node and add an Interval node to the sequence then define it in the Settings window, or
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On the 1D Geometry toolbar Primitives group, click Interval (). Or from the Draw group, click Interval and create an interval by clicking in the Graphics window. Also see Drawing Geometric Primitives in the Graphics Window.
When you have added a node or finished drawing intervals in the Graphics window, use the following section to define or fine-tune them.
Interval
From the Specify list, choose Coordinates (the default) to specify intervals using coordinates for the points that define the beginning and end of each interval, or choose Interval lengths to specify a left endpoint (starting point) and one or more interval lengths.
For Coordinates, choose a source from the Coordinate source list: The default is Table, for adding coordinates in a table of values below (the default is a single interval from 0 to 1). Alternatively, choose Vector to enter a vector of comma-separated or space-separated coordinates for the intervals’ starting points and endpoints. Click the Range button () to use the Range dialog box for specifying the vector of values for each coordinate.
For Interval lengths, first enter the coordinate of the starting point for the intervals in the Left endpoint field. Then choose a source from the Length source list: The default is Table, for adding interval lengths in a table of values below (the default is a single interval of length 1). Alternatively, choose Vector to enter a vector of comma-separated or space-separated lengths of the intervals. Click the Range button () to use the Range dialog box for specifying the vector of values for each length.
Selections of Resulting Entities
Select the Resulting objects selection check box to create predefined selections (for all levels — objects, domains, and boundaries — that are applicable) in subsequent nodes in the geometry sequence. To also make all or one of the types of resulting entities (domains and boundaries) that the interval consists of available as selections in all applicable selection lists (in physics and materials settings, for example), choose an option from the Show in physics (Show in instances if in a geometry part) list: All levels, Domain selection, or Boundary selection. The default is Domain selection, which is suitable for use with materials and physics defined in domains. For use with a boundary condition, for example, choose Boundary selection. These selections do not appear as separate selection nodes in the model tree. Select Off to not make any selection available outside of the geometry sequence. From the Color list, choose a color for highlighting the resulting objects selection. See Selection Colors.
Cumulative Selection
If you want to make the resulting entities contribute to a cumulative selection, select a cumulative selection from the Contribute to list (the default, None, gives no contribution), or click the New button to create a new cumulative selection (see Cumulative Selections).