House Floor Plan

Utility scripts (execute, don't read):

python scripts/generate_all.py       # DXF → ./图纸/  PNG → ./docs/images/
python scripts/generate_render_3d.py  # PNG → ./docs/images/

Consistency Rules

When modifying any drawing, follow these rules to maintain cross-drawing consistency:

1. Window positions — Defined once in building_config.py as SOUTH_WIN/NORTH_WIN/EAST_WIN/WEST_WIN. All scripts (elevations, renderings, 3D) read from the same arrays.
2. Floor heights — Derived chain: GL → F1_FL → F1_CL → F2_FL → F2_CL → ROOF → TOP. Never hardcode intermediate values.
3. Room layout — Floor plan partition coordinates (F1_X1, F2_NX3, etc.) are defined in config. Both generate_all.py and 3D renderings import the same values.
4. No phantom volumes — The building is a flat-roof box (ROOF + PARAPET). No raised roof volumes, attics, or mezzanines unless explicitly added to config.
5. East ≠ West — East and west facades have different window layouts because the underlying rooms differ. Never mirror one side to the other.

Design Principles

1. South-facing orientation — living spaces face south for light and ventilation
2. Public-private separation — LDK (living+dining+kitchen) open plan; bedrooms isolated
3. Wet-dry separation — bathrooms with separated wash/toilet/shower zones
4. Every room has a door — verify all rooms have proper entry/exit with correct swing direction
5. Elderly room on ground floor — south-facing, easy access (uses shared bathroom)
6. Stairs alignment — upper/lower floor stairwells must occupy the same XY footprint

Workflow

- [ ] Step 1: Confirm requirements (occupants, bedrooms, plot size, floors, style)
- [ ] Step 2: Zone allocation (ground: public + elderly; upper: private)
- [ ] Step 3: Update building_config.py (walls, rooms, windows)
- [ ] Step 4: Door & window placement (verify every room has access)
- [ ] Step 5: Furniture layout (per reference.md standard sizes)
- [ ] Step 6: Circulation check (no dead-end rooms)
- [ ] Step 7: Dimension annotation (segmented + total)
- [ ] Step 8: Run generate_all.py + generate_render_3d.py
- [ ] Step 9: Cross-drawing validation (see checklist below)

Validation Checklist

Functional:
- [ ] Every room has at least one door with correct swing direction
- [ ] Master bedroom 2 (2F) has en-suite bathroom door
- [ ] Stairwell position matches between floors
- [ ] Kitchen is adjacent to dining area
- [ ] Corridor width ≥ 1.2m throughout

Cross-drawing consistency:
- [ ] Elevation windows match floor plan window_h/window_v positions
- [ ] 3D renderings match elevation window layout exactly
- [ ] No phantom roof volumes or extra building mass in renderings
- [ ] East and west elevations reflect actual room differences
- [ ] Section shows correct slab/parapet/stair positions
- [ ] Building height (TOP) is identical across all drawings

Drawing Specification

• Exterior wall: 240mm (lineweight=50), Interior: 120mm (lineweight=35)
• Room label: Chinese name (bold) + English name (gray) + dimensions (gray), centered
• Dimensions: exterior segmented (-700mm offset) + total (-1400mm offset)
• Export: DXF (AutoCAD R2010, mm units) + PNG (150dpi, 效果图200dpi)
• CJK Font: PNG/SVG 使用内嵌子集字体 fonts/NotoSansSC-Subset*.ttf；DXF 自动检测系统字体（SimHei/PingFang/Noto Sans CJK SC 等）

Drawing Quality Standards

MEP (Mechanical, Electrical, Plumbing) Drawings

Electrical plans must include:

• Distribution box (DB) with BV cable specifications (BV10/BV2.5/BV4)
• Circuit control lines (switch → light dashed connections)
• Standard symbols: ⊕ ceiling light, ● downlight, ▶ 10A outlet, □ 16A outlet
• Room name labels matching floor plan positions

Plumbing plans must include:

• Pipe diameter annotations on lines (DN20/DN50/DN110)
• Riser IDs (JL-1/WL-1) at vertical pipe locations
• Valve symbols (butterfly ▷◁) at branch points
• Water meter symbol (◇W) at building entry

Rendering Quality

Elevation renderings include:

• Multi-layer sky gradient with clouds
• Lawn stripe texture, walkway, ground shadow
• Wall surface gradient (top-light to bottom-dark)
• Glass reflection (sky blue → green ground reflection)
• Stone cladding texture with horizontal joint lines
• Multi-layer tree canopies and landscaping details

3D perspective renderings include:

• Glass horizontal highlight band
• Multi-layer tree crowns (5-layer overlay)
• Grass stripe texture
• Building shadow projection on ground

Additional Resources

• reference.md — Building code (GB 55031-2022), room area guidelines, color scheme, furniture sizes
• examples/generate_house_dxf.py — Standalone single-floor example