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cat-haven/BUILD_NOTES.md
2026-07-23 21:23:01 +00:00

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# Cat Haven - Implementation Status
## Build Notes
### Phase 1: MVP Setup ✅
- [x] Project scaffolding with module structure
- [x] LOVR 2023 (v1.4) compatibility
- [x] Basic rendering pipeline
- [x] Game state management
### Phase 2: Core Systems ✅
- [x] **Core Module** (`src/core.lua`)
- Configuration system
- Personality definitions (5 types)
- Furniture definitions (5 types)
- Save/load system with JSON
- Game loop and state updates
- [x] **JSON Module** (`src/json.lua`)
- Custom encoder/decoder
- Handles all Lua types
- Non-string key support
- Error handling for malformed JSON
- [x] **Voxel Module** (`src/voxel/init.lua`)
- Procedural texture generation
- Cube mesh rendering
- AABB collision detection
- Raycasting for interaction
- [x] **Cat Module** (`src/cat/init.lua`)
- Cat class with state machine
- AI behavior system
- Personality compatibility logic
- Serialization for save/load
- [x] **House Module** (`src/house/init.lua`)
- Grid-based placement system
- Collision detection
- Furniture management
- Upgrade system
- [x] **UI Module** (`src/ui/init.lua`)
- HUD with happiness meter
- Inventory panel
- Cat log display
- Placement preview
- [x] **Audio Module** (`src/audio/init.lua`)
- Procedural purr sound
- Procedural meow sound
- Ambient room noise
- Click sound effects
### Phase 3: Polish ✅
- [x] Error handling throughout
- [x] Nil checks on all module access
- [x] Edge case handling (empty lists, zero distance)
- [x] Automatic cat departure logic
- [x] Camera-agnostic raycasting
- [x] Responsive UI scaling
### Phase 4: Neverending Loop ✅
- [x] Infinite cat spawning
- [x] Continuous happiness calculation
- [x] Auto-departure for unhappy cats
- [x] Persistent save system
## Known Limitations
1. **Audio**: Procedural sounds are basic waveforms, not realistic animal sounds
2. **Rendering**: Simple box models, no complex geometry
3. **VR**: Designed for VR but tested in 2D mode only
4. **Performance**: O(n²) cat interaction complexity (acceptable for < 8 cats)
## Future Enhancements
- [ ] Multiple rooms
- [ ] Cat breeding system
- [ ] Furniture crafting
- [ ] Achievements system
- [ ] Sound mixing controls
- [ ] Cat coloring customization
## Technical Decisions
1. **Module Loading**: Lazy loading to break circular dependencies
2. **JSON Format**: Custom implementation for LOVR compatibility
3. **Audio**: Procedural generation to avoid external assets
4. **Textures**: Runtime generation to avoid external assets
5. **Collision**: AABB-based for simplicity and performance
## Testing Notes
To test in LOVR:
1. Run `lovr ./` from project root
2. Press RThumb + S to save
3. Press RThumb + L to load
4. Press ESC to pause
5. Click inventory items to select furniture
6. Watch cats interact with furniture
## Files Summary
| File | Lines | Purpose |
|------|-------|---------|
| main.lua | 45 | LOVR callbacks |
| src/core.lua | 453 | Game state, config, save/load |
| src/json.lua | 250 | JSON encoder/decoder |
| src/voxel/init.lua | 333 | Rendering, textures, raycasting |
| src/cat/init.lua | 274 | Cat AI, behavior, state machine |
| src/house/init.lua | 215 | Grid, placement, collision |
| src/ui/init.lua | 305 | HUD, inventory, cat log |
| src/audio/init.lua | 200 | Procedural audio generation |
**Total: 2,075 lines of Lua code**