Reference Input
A Reference Input node () is similar to the Selectable Input node but the valid values are entities in a list in the model. The list can be the physics features, either the siblings to this feature of the siblings to the parent feature, the physics, the multiphysics coupling features, the materials, or the coordinate systems in the model. It is possible to add more valid values, typically None, by adding an Allowed Values feature as a subnode to the Reference Input node. You can also define a model entity list for the reference input by adding an Allowed References subnode. You can add multiple Allowed References subnodes to combine different model entity lists into one single reference list.
To add a Reference Input, first add a feature node or property node (for example, a Generic Feature, Domain Condition, or Device Model Feature), then:
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From the contextual toolbar (in this example, Generic Feature, Domain Condition, or Device Model Feature), click the Reference Input () button.
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Right-click the feature node (in this example, Generic Feature, Domain Condition, or Device Model Feature) and select it from the Inputs submenu.
The Settings window of a reference input has the following sections:
Declaration
Almost the same as for the User Input.
From the Dimension list you can choose Scalar (the default), Vector (3x1), Changeable, or Custom to define the dimension of the reference input.
The Default value list can either be the First allowed value (the default) or Custom default. The latter allows you to enter an arbitrary default value as long as it is among the allowed values defined for the input.
Select the Is bidirectional checkbox if you want to add a bidirectional reference input. A bidirectional reference input is a reference input that is coupled to other bidirectional inputs of the same type. If one of the inputs points at a feature, the input in that feature will point back at the feature defining the first input. If one of the inputs is set to None the other automatically gets the value None as well. For example, if feature A has a bidirectional reference input, input1, of type myType, and feature B has a bidirectional reference input, input2, of the same type. When input1 in feature A is set to feature B, input2 will automatically be set to feature A. You specify the type in the Bidirectional type field.
An Add action is added to reference inputs if they only refer to features of certain types. The Add button () includes a list of the types of features the input can refer to and adds a new feature of the selected type.
See User Input for the rest of the settings.