# 🌍 PHASE 28 - SESSION 1 LOG

**Date:** 15.12.2025 16:57  
**Session:** Foundation  
**Status:** IN PROGRESS ⚡

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## ✅ **COMPLETED:**

### **1. Planning** (5 min) ✅
- Created `PHASE28_WORLD_EXPANSION_PLAN.md`
- Defined 6-session roadmap
- Specified biome details
- Set technical architecture

### **2. BiomeSystem.js** (15 min) ✅
**File:** `src/systems/BiomeSystem.js` (250 lines)

**Features:**
- 5 biome definitions (Grassland, Forest, Desert, Mountain, Swamp)
- Biome map generation (500x500)
- Region-based biome placement
- Feature spawn probability per biome
- Tile color per biome
- Biome transition detection
- Statistics export

**Biomes:**
- **Grassland:** Green, 5% trees, farm area
- **Forest:** Dark green, 60% trees, rainy
- **Desert:** Tan, cacti, hot
- **Mountain:** Gray, rocks, cold
- **Swamp:** Dark green, fog, water

### **3. ChunkManager.js** (15 min) ✅
**File:** `src/systems/ChunkManager.js` (200 lines)

**Features:**
- 50x50 tile chunks
- 3x3 chunk loading (9 chunks active)
- Auto-load/unload based on player position
- Chunk caching
- Performance optimization
- Statistics tracking

**Performance:**
- Only loads ~22,500 tiles at once (9 chunks)
- Instead of all 250,000 tiles!
- 91% memory reduction!

### **4. Integration** (5 min) ✅
- Added both systems to `index.html`
- Scripts loaded in correct order

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## ⏳ **NEXT STEPS:**

### **Remaining for Session 1:**
- [ ] Initialize BiomeSystem in GameScene
- [ ] Initialize ChunkManager in GameScene
- [ ] Update Flat2DTerrainSystem to support biomes
- [ ] Update camera bounds to 500x500
- [ ] Test with player spawning at center
- [ ] Verify chunk loading works
- [ ] Check FPS with larger world

**Estimated:** 1-1.5 hours remaining

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## 📊 **PROGRESS:**

**Time Spent:** 40 minutes  
**Files Created:** 3  
**Lines of Code:** ~500  
**Systems:** 2 (BiomeSystem, ChunkManager)

**Session 1 Progress:** 60% complete

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**Next:** Integrate into GameScene and test!