Graphs

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In-editor Graph Editor

Create graph assets seamlessly within the Unreal Engine editor.

Runtime Graph Editor

Display graph editors dynamically during runtime.

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What is a Graph

Graphs are the core of Open Logic, giving users an easy way to create and manage complex logic.

Our custom graph editor, built with Unreal Motion Graphics (UMG), is different from Unreal Engine's existing graph systems.

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Editor Controls

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Graph

Key Combination	Action Description
[Hold] Middle Mouse Button	Pan across the graph
CTRL + Scroll Mouse Up	Zoom in on the graph
CTRL + Scroll Mouse Down	Zoom out of the graph
Right Click	Opens the node palette

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Pin

Key Combination	Action Description
Left Click	Connects the pin
ALT + Left Click	Disconnect the pin
Shift + Left Click	Removes the dynamic pin

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Node

Key Combination	Action Description
DELETE	Removes the node from the owning graph
Left Mouse Button	Selects the node
[Hold] Left Mouse Button	Moves the node

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Node Palette

The Node Palette is the primary method for adding nodes to your graph in Open Logic. It provides an interface where you can view and select from the available nodes. See Node Palette Classes.

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String conversion

Open Logic Graphs (UGraphObject) provides the FromString and ToString utility functions, which let you convert a graph object into a string or create graph data from a string.

Internal Graph Data Format

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This section provides an overview of the format used to store graph data in Open Logic.

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Global Structure

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Node Data Structure

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Event Data Structure

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Pin Data Structure