Set Variable (Flowgraph Node)

Overview

• Node Name: Set Variable
• Category: repeat_instant
• File: extensions/flowgraph/nodes/types/setVariable.lua
• Icon: cloud_upload
• Hidden: Yes (created via variable system, not node palette)

Writes a value to a flowgraph variable (graph-local or project-global) through a dynamically typed input pin.

Pin Schema

Input Pins

Output Pins

The input pin is created dynamically based on the selected variable's name and type.

Internals

How It Works

1. init() - Sets varName = nil, defaults to local graph variables.
2. setGlobal(global) - Switches variable target between graph-local and project-global. Removes the current input pin and resets varName.
3. setVar(name) - Looks up the variable, removes the old input pin, creates a new pin matching the variable's type, and reconnects compatible links.
4. work() - Calls self.target:change(varName, value) to update the variable, then passes flow through.
5. renameVariable(source, name, newName) - Handles variable renames from the variable system.
6. typeUpdated(source, name, newType) - Recreates the input pin when the variable type changes.
7. drawMiddle() - Shows the current variable value inline or ??? if missing.

Serialization

• Saves varName and global flag.
• On deserialization, calls setGlobal() then setVar() to rebuild the pin.

Example Usage

-- In the flowgraph editor, this node is created automatically when
-- you drag a variable from the variable panel as a "setter".
-- Equivalent runtime behavior:
self.graph.variables:change("myVar", newValue)

Additional Methods

C:_onDeserialized(nodeData)

Called after the node is deserialized (loaded from file). Restores runtime state from saved data.

Parameters:

• nodeData

C:_onSerialize(res)

Called when the node is serialized (saved to file). Returns data to persist.

Parameters:

• res

C:drawCustomProperties()

Custom ImGui drawing for the node's properties panel in the editor.

See Also

• Bool (Flowgraph Node) - Related reference
• Color (Flowgraph Node) - Related reference
• Generic Set/Get Variable (Flowgraph Node) - Related reference
• FlowGraph Guide - Guide