🎉 Sprint 2 Complete!

Excellent work! Let's document what we've accomplished and prepare for Sprint 3.

✅ Sprint 2: Activation System - DONE

Deliverables Completed:

1. Architecture ✅

• ✅ IActivatable interface (clean contract)
• ✅ ActivatableObject component (Observer Pattern)
• ✅ Single VisitManager managing entire system
• ✅ Event-driven architecture (decoupled design)

2. Features Working ✅

• ✅ Buildings activate based on visit thresholds
• ✅ Multiple activation types:
  • FadeIn ✅
  • ScaleUp ✅
  • FadeAndScale ✅
  • Instant ✅
• ✅ Multiple zones support (different areas of the world)
• ✅ Progressive building appearance (revisiting zones spawns more)

3. Code Quality ✅

• ✅ SOLID principles followed
• ✅ Observer Pattern implemented correctly
• ✅ Comprehensive debug logging
• ✅ No compiler errors/warnings
• ✅ No runtime errors on play/stop
• ✅ Helpful comments throughout

4. System Robustness ✅

• ✅ Auto-creates VisitManager if missing
• ✅ Handles shutdown gracefully (no null errors)
• ✅ Persists between scenes (DontDestroyOnLoad)
• ✅ Supports save/load architecture (future-ready)

📊 Sprint 2 Metrics

Files Created: 3

• IActivatable.cs
• ActivatableObject.cs
• VisitManager.cs (updated)

Lines of Code: ~450 lines

Design Patterns: 2

• Observer Pattern (event subscription)
• Singleton Pattern (VisitManager)

🎓 What We Learned

1. ONE VisitManager manages everything - not one per building
2. Zone IDs must match exactly - case-sensitive strings
3. Observer Pattern decouples buildings from manager
4. Shutdown order matters - defensive cleanup prevents errors
5. Auto-creation improves developer experience

📸 Demo Setup Working

Player drives through zone   
   ↓ 
Visit count increases
   ↓ 
Buildings activate with smooth animations   
   ↓ 
World grows progressively