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Knowledge base
Knowledge base
Free, anonymous browsing of Unreal Engine Blueprint examples, node references, and best practices. The same content the WoalzCraft plugin uses to generate Blueprints.
21 results for network
Remote Procedure Call — a function call sent across the network. Server / Client / Multicast versions exist.
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1. DIRECT REFERENCE (tightest coupling): Get reference → CastTo<BP_Other> → call function. Use when: actor A always knows about actor B (e.g. Player → HUD). 2. CAST via GetAllActorsOfClass (loose): find → cast → call. Use when: you need to find actors dynamically. 3. EVENT DISPATCHER (loose): Owner calls dispatcher → listeners receive event. Use when: one actor notifies many others (e.g. death notification). 4. BLUEPRINT INTERFACE (loosest): Call interface message → any implementing actor responds. Use when: multiple different actor types should respond to same action (e.g. 'Interact'). 5. GAME INSTANCE (persistent): Store shared data in GameInstance → GetGameInstance → Cast. Use when: data must survive level loads.
A named, reusable subgraph with inputs + outputs. Cleaner than copy-pasting node clusters.
OR=BooleanOR, NOT=Not_PreBool, XOR=BooleanXOR
ANDUE 5.4, 5.7updated 2mo agoDealing damage: Event → ApplyDamage(TargetActor, BaseDamage, InstigatorController, DamageCauser, DamageTypeClass). Receiving: EventAnyDamage → Damage output → Subtract_FloatFloat(CurrentHealth, Damage) → FClamp(Result, 0, MaxHealth) → SET CurrentHealth → Branch(CurrentHealth <= 0) → True: DestroyActor. Initialize CurrentHealth=MaxHealth in BeginPlay.
UNiagaraFunctionLibrary::SpawnSystemAtLocation. bAutoDestroy=true for fire-and-forget. Use SpawnSystemAttached to attach to a component.
SpawnSystemAtLocationUE 5.3, 5.4, 5.5, 5.6, 5.7updated 2mo agoWhy: UE5 has a soft limit on graph complexity (typically ~2000 nodes per function). Your Blueprint exceeded it. Fix: Split logic across multiple functions: pick a logically-cohesive section, right-click → Collapse to Function. Repeat until each function is under ~500 nodes. Consider creating separate Macro Library or Blueprint Function Library assets to share common chunks.
Legacy Cascade system. Prefer Niagara (SpawnSystemAtLocation) for new projects.
SpawnEmitterAtLocationUE 5.3, 5.4, 5.5, 5.6, 5.7updated 2mo agoReturns radians. Use RadiansToDegrees to convert.
Atan2UE 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7updated 2mo ago