23 lines
1.2 KiB
Markdown
23 lines
1.2 KiB
Markdown
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# Use relations to debug
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Relations are a useful tool to understand the dependencies between each port of a node. For example, to get the result of A + B with the Add node, you need to provide a value for A and B. Likewise, before invoking the Log node, you should provide a value for its Message input port.
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Visual scripting uses this information in the background for Predictive Debugging. For example, if you tried to get the value of A + B without providing a value for A, the node would show up as orange to indicate that it fails in play mode.
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When that happens, you can use the warnings shown in the Graph Inspector to know what is missing.
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Relations can also help understand the ports that are required and which ports are optional. For example, in the Get Child node (under fuzzy finder **Codebase** > **Unity Engine** > **Transform**), there is no need to connect the control ports if the goal is to get the transform value output.
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Enable the Relations toggle in the toolbar for the inner connections of each node to be displayed.
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> [!NOTE]
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> You cannot edit relations. They are predefined for each type of node.
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