Branch Node<T>

The Branch Node takes a single input of any type, and outputs to any number of outputs that all can output any types.

Creating Nodes

Here's a video tutorial on creating all node variants in Jungle.

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Overview

ONLY NEED ONE OUTPUT?

If you plan to use only a single output from the branch node, we recommend building an IO Node instead.

All Branch Nodes are required to have a BranchNode class attribute defined. This attribute defines the input port and output ports on the node.

Here's a list of all the properties you can define in the BranchNode attribute:

Name	Type	Notes
InputPortName	string	Defines the name of the input port
OutputPortNames	string[]	Defines the names for each output port
OutputPortTypes	Type[]	Defines the outputted type for each port

The output port names and types should be defined in the same order and should always be the same length. You are limited to 256 output ports per node.

Here's an example of a BranchNode attribute:

[BranchNode(
    InputPortName = "My Input",
    OutputPortNames = new []
    {
        "My Output A",
        "My Output B"
    },
    OutputPortTypes = new []
    {
        typeof(Port.None),
        typeof(Port.None)
    }
)]
public class MyBranchNode : BranchNode<Port.None>
...

Result in the Jungle Editor

WHERE IS THE INPUT TYPE DEFINED?

The Branch Node is a generic class, so you define the input port type when you inherit from the class.
For example, if you want the input port to accept a string value, you would set your script up like so:

public class MyBranchNode : BranchNode<string>
...

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tip

The BranchNode<T> class inherits from the JungleNode class. This means all public and protected members of JungleNode are accessible within BranchNode<T>.

Read about the base JungleNode class here.

Properties

Uid

public string Uid { get; }

Gets the unique identifier for this node.

JungleTree

public JungleTree JungleTree { get; }

Gets a reference to the original tree this node is part of.

OutputPorts

public Port[] OutputPorts { get; }

Gets the list of output ports for this node.

Nothing

public static readonly Port.None Nothing

Gets the shorthand equivalent of new Port.None().

IsPlayback

public bool IsPlayback { get; }

Indicates whether this node is an instance of a playback.

Playback

public JunglePlayback Playback

Gets the playback instance associated with this node.

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Methods

GetInputPortInfo

public override Port.Info GetInputPortInfo()

Returns information about the node's input port.

GetOutputPortsInfo

public override Port.Info[] GetOutputPortsInfo()

Returns information about the node's output ports.

AddRevertAction

public string AddRevertAction(Action action)

Adds a revert action to be executed when the playback stops.

Call

protected void Call(Port.Call call)

Sends a port call to the node without stopping its execution.

Call

protected void Call(Port.Call[] calls)

Sends multiple port calls to the node without stopping its execution.

Stop

protected void Stop()

Stops the node without sending out any port calls.

CallAndStop

protected void CallAndStop(Port.Call call)

Sends out a port call and stops the node.

CallAndStop

protected void CallAndStop(Port.Call[] calls)

Sends out multiple port calls and stops the node.

OnStart

protected abstract void OnStart(T inputValue)

Invoked immediately when this node is started.

OnStop

protected virtual void OnStop()

Invoked immediately when this node is stopped.

OnUpdate

protected abstract void OnUpdate()

Invoked every frame while this node is running.

OnLateUpdate

protected virtual void OnLateUpdate()

Invoked every frame after every update function has been called.

OnFixedUpdate

protected virtual void OnFixedUpdate()

Invoked every fixed frame while this node is running.

OnValidation

protected virtual string[] OnValidation()

Called whenever the tree performs a validation pass. Should return a list of issues with the node if any.

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Boilerplate

using Jungle;

[NodeProperties(
    Title = "Branch Node",
    Description = "One input, multiple outputs."
)]
[BranchNode(
    InputPortName = "Input",
    OutputPortNames = new []
    {
        "Output A",
        "Output B"
    },
    OutputPortTypes = new []
    {
        typeof(Port.None),
        typeof(Port.None)
    }
)]
public class MyBranchNode : BranchNode<Port.None>
{
    protected override void OnStart(Port.None _)
    {
        CallAndStop(new []
        {
            new Port.Call(0, Nothing),
            new Port.Call(1, Nothing)
        });
    }
    
    protected override void OnUpdate() { }
}

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Example

Here's a simple example of a Branch Node that takes in a number and outputs weather the number is positive or negative.

using Jungle;

[NodeProperties(
    Title = "Positive/Negative",
    Description = "Outputs weather the input is positive or negative."
)]
[BranchNode(
    InputPortName = "Number",
    OutputPortNames = new []
    {
        "Positive",
        "Negative"
    },
    OutputPortTypes = new []
    {
        typeof(Port.None),
        typeof(Port.None)
    }
)]
public class PositiveNegativeNode : BranchNode<int>
{
    protected override void OnStart(int number)
    {
        if (number >= 0)
        {
            // Call the positive port
            CallAndStop(new Port.Call(0, Nothing));
        }
        else
        {
            // Call the negative port
            CallAndStop(new Port.Call(1, Nothing));
        }
    }
    
    protected override void OnUpdate() { }
}

As shown in the example above, the input port is named Number and accepts the type int. Also defined are two output ports named Positive and Negative that output nothing.

With this setup, when a node calls this node, it inputs a value of type int to the Number port. The node then checks if the number is greater than or equal to zero. If it is, it calls the Positive port. If it's not, it calls the Negative port.

This configuration allows us to create a node with branching logic that can run different sequences based on whether the inputted number is positive or negative.