Why can't I use standard JavaScript arrays in ReactUMG?

ReactUMG uses PuerTS to bridge JS and C++. Standard JS arrays lack the specific memory layout and type safety required by Unreal's TArray system, so native arrays must be explicitly created via UE.NewArray().

How do I access elements in a native UE array?

Unlike JS arrays where you use brackets (e.g., arr[0]), native UE arrays in PuerTS require the .Get(index) and .Set(index, value) methods to ensure type safety.

Which builtin type should I use for GridPanel ColumnFill?

You should use UE.BuiltinFloat for ColumnFill and RowFill properties to ensure the layout engine correctly interprets the scaling weights.

Where is the best place to initialize UE.NewArray()?

For performance optimization, it is recommended to create static or memoized instances of native arrays rather than recreating them inside the render() method.

UE ReactUMG TArray Handler

Name: UE ReactUMG TArray Handler
Author: 15195999826

by15195999826

Game Development

Manages native Unreal Engine TArray properties within ReactUMG to ensure type safety and engine compatibility.

About

This skill provides specialized guidance for developers using ReactUMG via PuerTS to interface with Unreal Engine's native TArray system. It solves the common pitfall of passing standard JavaScript arrays to UE components by enforcing the use of UE.NewArray() with appropriate built-in type constants. This is critical for configuring UI layouts like GridPanels and handling any custom Unreal properties that require native array structures for performance and engine stability.

Key Features

Enforces use of UE.NewArray() over standard JavaScript arrays
Optimizes GridPanel layout configurations including ColumnFill and RowFill
Standardizes TArray manipulation using .Get(), .Set(), and .Add() methods
Provides quick access to Builtin type constants like Float, Int, and String
Prevents PuerTS type errors by implementing native array access patterns
0 GitHub stars

Use Cases

Managing native Unreal Engine collections without causing PuerTS type mismatches
Defining column and row layout weights for Unreal Engine GridPanels
Passing dynamic lists of data from React scripts to native C++ components

About

Key Features

Enforces use of UE.NewArray() over standard JavaScript arrays
Optimizes GridPanel layout configurations including ColumnFill and RowFill
Standardizes TArray manipulation using .Get(), .Set(), and .Add() methods
Provides quick access to Builtin type constants like Float, Int, and String
Prevents PuerTS type errors by implementing native array access patterns
0 GitHub stars

Use Cases

Managing native Unreal Engine collections without causing PuerTS type mismatches
Defining column and row layout weights for Unreal Engine GridPanels
Passing dynamic lists of data from React scripts to native C++ components