LEGION Model Builder Help

Managing links into a Group Object

Because a Group Object contains several Spatial Objects, some extra work is necessary to manage how links work: both into and out from the group.

The ‘Links In’ tab enables you to control which ‘internal’ objects of the group can be linked to, and how external objects will link to them.

Note: If you need to refresh your knowledge of linking methods, please see Linking methods
Parent topic: Creating Group Objects

To define links in to the Group Object:

  1. Open the Group Object dialog box by double clicking on the object in the Object Directory or right-clicking in the workspace and selecting Edit > Group Object <name>.
  2. Click the ‘Links In’ tab.
  3. Select one of the four available linking methods:
    • Link by percentage weighting
    • Link by entity type
    • Link by entity choice
    • Link by Final Destination
  4. Click the Add Link button.
See the following related procedures for each of the four methods.

To define links by percentage weighting:

  1. From the ‘Select target objects’ dialog, select the objects you want to be able to receive links and click OK.

    The objects will be listed in the dialog box along with a series of columns indicating percentage weighting.

  2. To define the percentage of Entities you want to distribute to each object, click on the name of each target and drag your cursor to the right.

    The horizontal percentage bar indicates the percentage of Entities you are assigning to each object (a split of 50/50% between two objects means that half of all Entities targeted to the group will go to each).

  3. Enter a value for the ‘% of people consider congestion ahead’.
  4. Enter a value for the ‘% of people follow the majority’.

    If you want to split percentages equally between all the selected objects, click the Uniform Distribution button.

  5. Click OK to save your changes.

To define links by Entity Type:

  1. From the ‘Select target objects’ dialog, select the objects you want to be able to receive links and click OK.

    The ‘Add Link’ dialog is displayed.

  2. Select the Entity Types you would like to be able to link to the Group Object using the selection buttons >, >>, <, <<.
  3. Click OK.
  4. If you added more than one object, the ‘Add Link’ dialog box for each of the objects will be displayed in turn. Repeat steps 2 and 3 for each.

    Your selected Entity Types and objects they are linked to are displayed in the ‘Edit <name> dialog box.

  5. Click OK to save your changes.

To define links by Entity choice:

  1. From the ‘Select target objects’ dialog, select the objects you want to be able to receive links and click OK.

    The objects are listed in the ‘Objects’ column.

  2. Enter a value for the ‘% of people consider congestion ahead’.
  3. Enter a value for the ‘% of people follow the majority’.
  4. Under ‘Entity Choice Decision Method’, select one of:
    • Shortest distance
    • Fewest occupants
  5. Click OK to save your changes.

To define links by Final Destination:

  1. From the ‘Select target objects’ dialog, select the objects you want to be able to receive links and click OK.

    The ‘Add Link’ dialog is displayed with details of the first object selected.

  2. Select the Final Destinations you would like to be able to link to the Group Object using the selection buttons >, >>, <, <<.
  3. Click OK.
  4. If you added more than one object, the ‘Add Link’ dialog for each of the objects will be displayed in turn. Repeat steps 2 and 3 for each.

    Your selected Entity Types and destinations are displayed.

  5. Click OK to save your changes.