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Switch (Any) / InversedSwitch (Any)

Switch (Any)

This node is used to select one output from multiple inputs when executing a workflow.

  • It receives multiple input? inputs and outputs a single one selected by select.
  • input? can be of any type, and the output type is determined by the input type.

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InversedSwitch (Any)

This node is used to select and execute different types of sub-workflows for a single input.

  • It can connect multiple output lines for a single input, and only outputs through the one selected by select.
  • input can be of any type, and the type of output? is determined by the type of input.
  • When using ComfyUI v0.1.0 and Impact Pack v7.2 or later versions, if it is select_on_execution mode, you can control the execution path of the workflow dynamically.

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sel_mode

  • select_on_prompt: Determines the selection by select statically before the workflow is executed. (for legacy)
    • This method must be used in ComfyUI versions prior to v0.1.0 due to limitations in dynamically changing the workflow execution structure.
    • It operates by virtually disconnecting node connections before the workflow is executed.
    • In this mode, connecting node outputs other than ImpactInt or Primitive nodes to the select input will cause malfunction.
    • In the following workflow, you can selectively execute a workflow using either Canny or OpenPose Pose depending on the select value.

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  • select_on_execution: Determines the selection by select dynamically during workflow execution.
    • This works properly only in ComfyUI versions after Aug. 16, 2024 (v0.1.0). Earlier versions will generate errors due to execution structure limitations.
    • In this mode, you can connect any integer output node to the select input.
    • When using this mode with an Inversed Switch - Switch (any) structure for execution, you should be aware of the following:
      • Inversed Switch sends an ExecutionBlocker signal to stop execution on the unselected outputs.
      • Switch (any) only requests execution for the selected input among its inputs.
      • However, if an unselected output from Inversed Switch is connected to an output node other than Switch (any) (such as PreviewImage), it will attempt to execute forcibly, regardless of Switch (any).
      • In this case, the execution stop signal of ExecutionBlocker is transmitted transitively, causing the execution of the Switch (any) node to stop as well.
      • In other words, for proper execution control, output nodes in the sub-workflow between Inversed Switch and Switch (any) should be removed (or muted) as shown below.
      • (Note) PreviewBridge is an output node because it can be an endpoint node, even though it has an output.

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