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UE5-Modular-Game-Framework/docs/blueprints/06-ui/47_WBP_HUDController.md
Lefteris Notas 411edea8ce add blueprints
2026-05-19 13:22:27 +03:00

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WBP_HUDController — Widget (Root HUD)

Parent Class: UUserWidget (created via HUD Blueprint) Dependencies: SS_UIManager, BPC_InteractionDetector, BPC_HealthSystem, BPC_StressSystem, BPC_StaminaSystem, BPC_NarrativeStateSystem, BPC_ObjectiveSystem, BPC_DialoguePlaybackSystem File: WBP_HUDController

Purpose

The master HUD container. Owns all in-world HUD sub-widgets and manages their visibility based on game phase and player state. Does NOT own full-screen menus — those are managed by SS_UIManager.

Responsibilities

  • Create and manage all HUD sub-widgets (diegetic display, interaction prompt, subtitles, notifications, objective overlay, screen effects)
  • React to E_GamePhase changes (hide HUD during cutscenes, show during play)
  • Route visibility of individual HUD elements via gameplay tags
  • Never display raw data — always delegates to child widgets
  • Handle fade-to-black transitions for death/loading

Variables

Name Type Description
DiegeticHUDWidget WBP_DiegeticHUDFrame The diegetic UI element (watch/visor/etc)
InteractionPromptWidget WBP_InteractionPromptDisplay Interaction cues
SubtitleWidget WBP_SubtitleDisplay Dialogue/event subtitles
NotificationWidget WBP_NotificationToast Toast messages
ObjectiveWidget WBP_ObjectiveDisplay Objective overlay
ScreenEffectWidget WBP_ScreenEffectController Full-screen effects
MinimapWidget Widget Optional minimap/compass
bHUDVisible Bool Master visibility flag
FadeWidget Image Black full-screen image for fades

Sub-Widget Class References

Variable Name Default Class
DiegeticHUDClass WBP_DiegeticHUDFrame (subclass per project)
InteractionPromptClass WBP_InteractionPromptDisplay
SubtitleClass WBP_SubtitleDisplay
NotificationClass WBP_NotificationToast
ObjectiveClass WBP_ObjectiveDisplay
ScreenEffectClass WBP_ScreenEffectController

Functions / Events

Name Inputs Outputs Description
ConstructChildren — — Spawns all sub-widgets, adds as children
SetHUDVisibility bVisible: Bool — Master show/hide (for cutscenes)
FadeToBlack Duration: Float — Lerps FadeWidget opacity to 1
FadeFromBlack Duration: Float — Lerps FadeWidget opacity to 0
TriggerDamageVignette Intensity: Float — Calls ScreenEffectWidget.TriggerDamageFlash
TriggerJumpScareFlash — — Calls ScreenEffectWidget.TriggerJumpScareFlash
SetStressDistortion Amount: Float — Routes to ScreenEffectWidget
OnPhaseChanged NewPhase: E_GamePhase — Listen from GI_GameFramework; hide/show HUD

Event Dispatchers

Name Parameters Fired When
OnHUDHidden — HUD hidden (cutscene/loading)
OnHUDShown — HUD restored
OnFadeComplete bFadedIn: Bool Fade animation completes

Blueprint Flow — Phase Change Reaction

flowchart TD
    A[OnPhaseChanged received] --> B{NewPhase}
    B -->|InGame| C[SetHUDVisibility true]
    B -->|Cutscene| D[SetHUDVisibility false]
    B -->|Loading| E[FadeToBlack 0.5s]
    B -->|DeathLoop| F[FadeToBlack 1.0s]
    B -->|AltDeathSpace| G[Hide interaction prompt only]
    B -->|Paused| H[Keep HUD but hide diegetic]
    B -->|MainMenu / Credits| I[Destroy HUD entirely]

Communications With

Target System Method Why
SS_UIManager Direct reference Coordination with menus
GI_GameFramework Dispatcher (OnGamePhaseChanged) Phase-based visibility
BPC_InteractionDetector Dispatcher (OnFocusGained, OnFocusLost) Show/hide interaction prompt
BPC_DialoguePlaybackSystem Dispatcher (OnLineStarted, OnLineComplete) Subtitle routing
BPC_ObjectiveSystem Dispatcher (OnObjectiveActivated, OnObjectiveCompleted) Objective overlay updates
BPC_HealthSystem Dispatcher (OnHealthChanged, OnHealthCritical) Damage vignette
BPC_StressSystem Dispatcher (OnStressTierChanged) Stress distortion
[BPC_NotificationSystem] Dispatcher Toast messages

Reuse Notes

The HUD class references are configurable so each project can override DiegeticHUDClass with a themed skin (watch, visor, bracelet, etc.) without modifying any logic. The fade system is used by death handling, chapter transitions, and loading screens interchangeably.

  • Renamed from WBP_HUD to WBP_HUDController per Master naming convention.