Data Types\Boolean\ Expression

This node can be used to generate values (true or false) that can

trigger events throughout the interactive  experience.

Example

In the example below when "3DGeom-7" is clicked, the expression in "Evaluate Boolean Expression" node is checked to execute the node after or not. In this case the expression is simple "==" which is true, so the "3DGeom-7" geometry will be set to Grabbable.