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Interaction Validation

EDInteractionSystem now includes a dedicated API for special conditions validation.

This API is designed to let developers validate interactions in a reusable way for:

  • normal actor interactables
  • foliage / instanced mesh interactables
  • C++
  • Blueprint

Main pieces​

Validation context​

FEDInteractionValidationContext contains the runtime data that validators receive, including:

  • interactable tag
  • interactable actor
  • interactable component
  • instigator controller
  • instigator pawn
  • whether the target is foliage
  • foliage instance component / transform / location
  • interaction method
  • foliage config data when available

Validation result​

FEDInteractionValidationResult is the mutable result object passed through the validation pipeline.

It includes:

  • bAllowInteraction
  • DenyReason
  • FailureMessage

Validation object​

UEDInteractionConditionValidator is the reusable validation object.

You can:

  • create Blueprint subclasses
  • create C++ subclasses
  • assign them globally on the player interaction component
  • assign them inline on an interactable component
  • assign them by class on foliage entries in Project Settings

Validation order​

When the server checks special conditions, the pipeline is:

  1. UEDPlayerInteractionComponent::GlobalInteractionValidators
  2. UEDPlayerInteractionComponent::ValidateInteractionSpecialConditions(...)
  3. actor-specific UEDInteractableComponent::ValidationRules
  4. foliage-specific FEDFoliageInteractionData::ValidationRuleClasses

The first validator that denies interaction stops the chain.

Why this API exists​

This solves the previous hardcoded placeholder:

  • ServerSpecialConditionsNeededToInteract(...)

Instead of editing plugin internals every time, game code can now inject validation cleanly.

Typical use cases​

  • require a key item
  • require a gameplay tag or state
  • block interaction during combat
  • require a specific tool for foliage harvesting
  • gate interaction behind quest progression
  • limit interaction to a faction/class/team