#include <MassEntityRelations.h>

Public Member Functions
bool	operator== (const FRoleTraits &Other) const

Public Attributes
const UScriptStruct *	Element = nullptr

ERemovalPolicy	DestructionPolicy = ERemovalPolicy::Default

bool	bExclusive = true

EExternalMappingRequired	RequiresExternalMapping = EExternalMappingRequired::Default

Member Function Documentation

◆ operator==()

bool UE::Mass::Relations::FRoleTraits::operator== ( const FRoleTraits & Other ) const

inline

Member Data Documentation

◆ bExclusive

bool UE::Mass::Relations::FRoleTraits::bExclusive = true

"Exclusive" means there can be only one participant like this in a relation. For example, there can be only one parent in our ChildOf relation (bExclusive = true, on the "parent" participant, i.e. the Object) while there can be multiple children (bExclusive = false for the Subject)

◆ DestructionPolicy

ERemovalPolicy UE::Mass::Relations::FRoleTraits::DestructionPolicy = ERemovalPolicy::Default

What to do when entities serving this role are destroyed. This value affects the whole relation, including other participants.

◆ Element

const UScriptStruct* UE::Mass::Relations::FRoleTraits::Element = nullptr

The element type that will be added to the participating entity. Can remain empty. Every entity will get the relation tag as well, the FRelationTypeTraits.RelationTagType

◆ RequiresExternalMapping

EExternalMappingRequired UE::Mass::Relations::FRoleTraits::RequiresExternalMapping = EExternalMappingRequired::Default

Declares whether this relation-specific implementation details provide dedicated mechanism for mapping other roles for entities serving as this role, the role these traits affect. It essentially answers whether this role needs the system to find other relation participants (Yes) or it can handle the task with custom code (like via the Element, option No).

Defaulting to Yes to provide reliable, out-of-the-box functionality required for fetching participants of relation instances. Set to No if you want to save memory by not automatically populating and utilizing FRelationData.RoleMap.

The documentation for this struct was generated from the following file:

Engine/Source/Runtime/MassEntity/Public/MassEntityRelations.h

Public Member Functions