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Conditions

What is a condition ?​

Conditions can be used to trigger a controller only under specific circumstances. In order to create a condition, you will need to have external variables to compare values.

In the following example, both Button element and Car element share their parameters as external variables for the controller:

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You can then use these external variables inside a condition.

How to create a condition​

Simple condition​

  • Click on the Set Conditions button
  • Then click on the Add condition button

One condition will be added, the condition is composed of two operands and one operator :

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  1. — First Operand : left operand of the condition, it represents the external variable that you want to test.
  2. — Element type : type of element you are testing. Corresponds to a lifeline.
  3. — Element parameter : available parameters of the element.
  4. — Operator : comparison operator.
    1. == : Equal To.
    2. != : Not Equal To.
    3. > : Greater Than (only available for numeric parameters).
    4. < : Less Than (only available for numeric parameters).
    5. <= : Less Than or Equal To (only available for numeric parameters).
    6. >= Greater Than or Equal To (only available for numeric parameters).
  5. — Second Operand : right operand of the condition, it represents the value used to verify the condition.
  6. — Constant/Variable field : choose between a constant value or an external variable.
  7. — Constant value/Variable parameter : input the constant value or variable parameter (if variable is selected).

Multiple conditions​

If you click on the Add condition button , you can add multiple conditions.

attention

If multiple conditions are defined, all of them must be satisfied (logical AND). They are not evaluated as alternatives (OR)

Examples​

Below are a few examples of conditions :

Simple Equal condition​

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Multiple conditions​

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