Break (Struct)

Splits a struct value into its individual fields (e.g. Break Vector → X, Y, Z pins). Distinct from the loop Break — see that entry.

Inventory: add/remove items with array of structs

Create struct FInventoryItem: {ItemName (Name), ItemCount (int), ItemData (object ref)}. Variable: Inventory (Array<FInventoryItem>). AddItem: ForEachLoop(Inventory) → CastTo/Break FInventoryItem → Branch(ItemName==NewItem.Name) → True: Get → Modify Count → Array Set (replace at index) → return. If not found: Make FInventoryItem → Array Add. RemoveItem: Find by name → Branch(Count>1) → True: decrement → Set at index. Else: Array Remove at index. Key: Arrays of structs require 'Array Set' with index to modify in place — getting and modifying a copy does NOT update the array.

Inventory system with array of structs for items

Pattern: Struct S_InventoryItem(ItemName:String, Quantity:int, Icon:Texture2D, bStackable:bool). Variable Inventory(Array<S_InventoryItem>). AddItem: ForEachLoop(Inventory) → Branch(Element.ItemName == NewItem.Name AND bStackable) → True: SET Element.Quantity += Amount. If not found: Array_Add(NewItem). RemoveItem: Find index → Branch(Quantity > 1) → True: decrement. False: Array_Remove.

Struct

A user-defined data type bundling related fields (e.g. S_InventoryItem with Name+Count+Icon). Make/Break nodes convert.

Make

Constructs a struct value from its individual fields (e.g. Make Vector from X/Y/Z, Make Transform).

Make HitResult — construct a HitResult struct manually

BreakHitResult — split a HitResult struct into individual fields

Pure node. HitActor is the actor that was hit — cast it to use its interface.

DataTable

A spreadsheet-like asset holding rows of a struct type. Great for item catalogs, dialogue lines, level configs.

Variable references a deleted or renamed type

Why: The variable '{name}' is typed as something that no longer exists in your project. This happens when you delete or rename a Blueprint, Struct, or Class that other variables referenced — UE5 leaves the reference dangling. Fix: Open the Blueprint that owns '{name}' (in the Errors panel, click the file link). In My Blueprint panel, click '{name}' to select. In Details panel, change Variable Type to a valid type, or delete the variable entirely and remove all references.

string

string