# 12 — Pickups and Effects

**Status: Draft**

- **Scope:** Pass 10 pickup / consumable / EffectActor / currency archaeology (Batch 4D). Complements Pass 7 GE inventory in doc 06.
- **Inspection method:** BlueprintTools EventGraph DSL; ObjectTools CDO; `search_subclasses` on `RIREffectActor`; AssetTools referencers; SceneTools `find_actors` on already-loaded Test01 (read-only).
- **Last updated:** 2026-07-16
- **Current phase:** Phase 1 — Static Architecture
- **Last completed pass:** Pass 10 (Batch 4D)
- **Next pass expected to contribute:** Pass 11 when authorized; PIE for authority / overlap validation

## Draft tracking

### Completed sections
- All four `ARIREffectActor` children overlap → Apply → Destroy
- Legacy `BP_BasePickUp` / gold path
- GE application matrix + enemy GetASC incompatibility
- Currency / collectible matrix + negative stamina-potion inventory
- Pickup issue matrix

### Pending sections
- Sphere collision profile / `GenerateOverlapEvents` exact values (tool limit)
- Runtime multiplayer authority behavior for non-replicating EffectActors
- Whether full-health HealthPickUp leaves actor undestroyed (DSL branch shape)

### Evidence still required
- PIE: player overlap applies GE and updates Overlay bars
- PIE: enemy overlap early-out
- PIE: gold AddGold no-op (unimplemented BPI)
- Respawn / lifespan (none found statically)

### Tool or visibility limitations
- CDO `get_properties("sphere")` → None (component templates)
- Redirector paths reject `read_graph_dsl` (use canonical Potion/Food/Treasure paths)
- Native `ApplyEffectToTarget` body in C++ (already documented Pass 7)

---

## Native mechanism (Observed Implementation)

`ARIREffectActor::ApplyEffectToTarget`:

1. `UAbilitySystemBlueprintLibrary::GetAbilitySystemComponent(TargetActor)`
2. Early-out if null
3. `MakeOutgoingSpec(GEClass, 1.f)` + `ApplyGameplayEffectSpecToSelf`

**Enemy compatibility:** Library/interface GetASC uses `ARIRBaseCharacter::GetAbilitySystemComponent` → PlayerState. Enemies return **nullptr** → early-out. **Enemy-Incompatible Due to ASC Accessor** (static). Separate from chase/attack Implementation Missing (doc 09).

---

## 1. Pickup inventory

| Pickup | Parent | Collision/overlap | Authority | Effect or mutation | Presentation | Destroy/respawn | Status |
|--------|--------|-------------------|-----------|--------------------|--------------|-----------------|--------|
| `/Game/_Main/Blueprints/Items/Potion/BP_HealthPotion` | `RIREffectActor` | `OnComponentBeginOverlap(Sphere)` | **None** (`SwitchHasAuthority` absent); `bReplicates=false` | Instant `GE_PotionHeal` via `ApplyEffecttoTarget` | None in graph | Immediate `DestroyActor`; **no respawn/lifespan** | Active but Unverified / Authority Risk |
| `/Game/_Main/Blueprints/Items/Potion/BP_ManaPotion` | `RIREffectActor` | Sphere overlap | Same | Instant `GE_PotionMana` | None | Destroy; no respawn | Active but Unverified / Authority Risk |
| `/Game/_Main/Blueprints/Items/Potion/BP_ManaCrystal` | `RIREffectActor` | Sphere overlap | Same | Duration `GE_MoT_Small` | None | Destroy; no respawn | Active but Unverified / Authority Risk |
| `/Game/_Main/Blueprints/Items/Food/BP_OrangeSlice` | `RIREffectActor` | Sphere overlap | Same | Duration `GE_HoT_Small` | None | Destroy; no respawn | Active but Unverified / Authority Risk |
| `/Game/_Main/Blueprints/Items/Treasure/BP_SmallGoldPickUp` | `BP_BasePickUp` → `Actor` | Parent `PickUpRadius` overlap | **Yes** Authority + tag `Player` | `AddGold(PickUpAmount=25)` | `CoinsPickUp_Cue` | Destroy; no respawn | Partial (AddGold unimplemented) |
| `/Game/_Main/Blueprints/Items/BP_BasePickUp` | `Actor` | `PickUpRadius` | Authority + `Player` tag | Switch `E_PickUpType`: Gold / Health / Mana | SFX on paths | Destroy on success paths | Partial / Technical Debt |

**Redirectors (not separate logic):** `Items/BP_HealthPotion`, `Items/BP_ManaPotion`, `Items/BP_OrangeSlice`, `Items/BP_SmallGoldPickUp` → canonical paths above.

**`search_subclasses(RIREffectActor)`:** only the four GE pickups (+ native base). Gold is **not** an EffectActor child.

**Stamina pickup:** project search for stamina potion/widget assets → **none**. Explicit negative inventory.

**Test01 placement (Observed Implementation):** 1× each GE pickup; 3× `BP_SmallGoldPickUp`.

---

## 2. Gameplay Effect application matrix

| Pickup | Target filter | ASC lookup | GE | Apply call | Null behavior | Player compatibility | Enemy compatibility |
|--------|---------------|------------|----|------------|---------------|----------------------|---------------------|
| BP_HealthPotion | None in BP (any OtherActor) | Native ApplyEffectToTarget → GetASC | `GE_PotionHeal` Instant +25 Health | `ApplyEffecttoTarget(OtherActor, InstantGameplayEffectClass)` | Early-out; **DestroyActor still runs after call** | Compatible if player ASC via PlayerState | **Enemy-Incompatible Due to ASC Accessor** (null ASC) |
| BP_ManaPotion | None | Same | `GE_PotionMana` Instant +30 Mana | Instant class | Same (destroy always) | Compatible (static) | Enemy-Incompatible |
| BP_ManaCrystal | None | Same | `GE_MoT_Small` Duration | `DurationGameplayEffectClass` | Same | Compatible (static) | Enemy-Incompatible |
| BP_OrangeSlice | None | Same | `GE_HoT_Small` Duration | Duration class | Same | Compatible (static) | Enemy-Incompatible |

**Connected path (all four GE pickups):**

`OnComponentBeginOverlap(Sphere)` → `ApplyEffecttoTarget` → `DestroyActor`

No actor-class filter, no Player tag, no authority switch, no UI notification, no Niagara in graph.

**Classification reminder:** GE property assignment + overlap apply call = Connected static path. Runtime success = **Requires Runtime Inspection**.

---

## 3. Currency / collectible matrix

| Asset/system | Entry point | Stored value | Authority | Replication | UI | Persistence | Status |
|--------------|-------------|--------------|-----------|-------------|----|-------------|--------|
| `BP_SmallGoldPickUp` / `GoldPickUp` | Authority overlap + tag Player | Calls `BPI_PlayerController.AddGold(PickUpAmount)`; CDO Amount=25 | Authority gated on pickup | Pickup `bReplicates=true` | No gold UI widget found | **No GI / save store found** | Partial |
| `AddGold` on `PC_Character` | Called from `GoldPickUp` | Interface method | — | — | — | — | **Present but Unconnected** (`bIsImplemented=false`; not in `RIRPlayerController` C++) |
| Legacy Health/Mana via `BP_BasePickUp` | Enum Health/Mana | `DEPRECATED_RecoverPlayerHealth/Mana` | Authority | — | None | Character DEPRECATED floats | Technical Debt / dual with GAS potions |
| Inventory / Coin / Currency / Score systems | Searched | — | — | — | — | — | **Explicit negative inventory** (no connected non-gold currency beyond above) |
| Stamina collectible | Searched | — | — | — | — | — | **Missing** |

**Gold consequence:** Overlap can destroy the gold actor and play SFX while `AddGold` does nothing statically — **Incomplete Refactor**.

---

## 4. Pickup issue matrix

| Asset | Missing or defective link | Static consequence | Runtime question | Classification |
|-------|---------------------------|--------------------|------------------|----------------|
| All four EffectActor pickups | No `SwitchHasAuthority`; `bReplicates=false` | Overlap may fire on clients; destroy may desync | Who applies GE / who destroys? | Authority Risk |
| All four EffectActor pickups | No target filter | Non-player actors may trigger destroy | Does debris/AI destroy potions? | Requires Runtime Inspection |
| All four EffectActor pickups | Destroy after Apply even if ASC null | Enemy (or null ASC) still destroys pickup | Wasted loot on enemy touch? | Enemy-Incompatible Due to ASC Accessor + destroy side effect |
| All four EffectActor pickups | No respawn / lifespan | One-shot only | Intentional? | Partially Implemented |
| All four EffectActor pickups | No UI notify | Overlay may update via ASC only | Bars animate on pickup? | Active but Unverified |
| `BP_BasePickUp` Health/Mana | Uses DEPRECATED recover, not GEs | Dual heal/mana systems vs potions | Which values HUD shows? | Technical Debt / Incomplete Refactor |
| `BP_SmallGoldPickUp` | `AddGold` unimplemented on PC | Gold mutation missing | Does gold vanish with no score? | Present but Unconnected (receiver) |
| Stamina | No pickup / no Overlay widget | Stamina attribute UI unused | — | Missing |
| Sphere collision props | Unreadable via MCP CDO | Cannot classify Collision Configuration Conflict from profile alone | GenerateOverlapEvents true? | Unknown — Tool Limitation |

---

## Legacy BP_BasePickUp detail (Observed Implementation)

```
OnComponentBeginOverlap(PickUpRadius)
  → SwitchHasAuthority → Authority
    → ActorHasTag(OtherActor, "Player")
      → Switch E_PickUpType:
          Gold   → GoldPickUp   → GetPlayerREF → AddGold(PC, Amount) → Coins SFX → Destroy
          Health → HealthPickUp → if DEPRECATED health < max → DEPRECATED_RecoverPlayerHealth → potion SFX → Destroy
          Mana   → ManaPickUp   → analogous DEPRECATED mana recover
```

**DSL note:** Health/Mana sound+destroy appear in the true branch of the “not full” check (no explicit `else`). If already full, static reading suggests **no destroy** — **Requires Runtime Inspection** / possible Partial behavior.

---

## UI notifications from pickups

| Source | Notification | Status |
|--------|--------------|--------|
| GE pickups | None in graphs | Missing |
| Gold | Audio only | Partial |
| `WBP_BannerMessage` | Not referenced by pickups this pass | Present; Unconnected to pickups |

ASC Overlay health/mana bars may reflect GE changes if InitOverlay path active — that is attribute UI, not pickup-specific notification.

---

## Correlation to prior docs

- GE CDO magnitudes / orphan default-attribute GEs: **doc 06** (unchanged inventory; reachability of consumable GEs **confirmed Active static path** again).
- Enemy GetASC: **doc 06 / 09** — pickup enemy incompatibility unchanged; no new enemy AI analysis.
- HUD dual path: **doc 11** — Overlay may show GE heals; legacy UpdatePlayerHUD unimplemented.