LEGION Model Builder Help

Changing the properties of a CAD Layer

By changing the properties of a CAD Layer you can specify whether the CAD Objects on a layer are included as part of a simulation and whether to include the CAD as part of a file for use with FDS (Fire Dynamics Simulator) fire-modelling software. You can also choose whether or not the layer is considered when Auto-navigation routes are calculated.

To change the properties of a CAD Layer:

  1. Right-click on the relevant CAD Layer in either the Object Directory or the Layers Directory and select Edit Properties.

    The ‘Edit <Layer> dialog is displayed.

  2. Specify whether to use the CAD objects it contains within your simulation, by checking or unchecking the box labelled Use in simulation.
  3. If the layer contains objects that you would like to exclude from the Auto-navigation process, uncheck the box labelled Use for Auto-navigation. This can help speed up the software as it doesn’t calculate possible Entity paths around each small CAD element. It also activates the 'Availability' tab, so you can now apply Availability profiles to the CAD layer.
    Note: Entities will still be able to negotiate around small objects when they encounter them on their journey.
  4. If you want to include the CAD on this layer in a file for use with the FDS software, click on the FDS tab.
  5. Check the box labelled Include CAD in FDS file.
  6. Enter a value in metres for Height of CAD.
  7. Click OK to save your settings.
Parent topic: Working with Layers

Applying Availability profiles to CAD layers

In certain situations you may need to make CAD layers available or unavailable at different times in a simulation. This is useful when modelling different types of train on the same platform.

For example, you may need different CAD-defined trains to appear on a platform at different times to simulate timetabled services. You can achieve this by making different CAD layer views available at different times.

To apply an Availability profile to a CAD layer:

  1. Right-click on the relevant CAD Layer in either the Object Directory or the Layers Directory and select Edit Properties.
  2. Uncheck the box labelled 'Use for auto-navigation'.
  3. Click on the ‘Availability’ tab.
  4. Select an Availability Profile from the drop-down list labelled ‘Time Scope’.
  5. If you want to apply conditions to the Availability Profile, check the box labelled ‘use condition’.
  6. Select an option from the left-hand drop-down list:
    • AND – the condition will apply only when the ‘Time scope’ settings and the conditional settings are both ‘true’.
    • OR – the condition will apply when either the ‘Time scope’ settings or the conditional settings are ‘true’.
  7. Set up your condition as described from step 4 of "To set up a Condition:" in Setting up Conditions .
  8. If you wish to apply any restrictions to the condition, click on the ‘Availability’ tab again and enter values for the following restrictions (details in Restrictions ):
    • Time before action
    • Minimum activity period
    • Maximum activity period
    • Minimum time between Actions
  9. Click OK to save the parameters.