house — site, semi-outdoor, layer composition
The same small detached house written two ways. examples/house.muro is one file of 89 lines; examples/house/ is five files of 102 lines. Both give 13 spaces / 31 boundaries / 92.75 m² of interior floor area / 73.24 m² semi-outdoor, and the output of stats, light and site is identical between them.
What it shows first
- The
level:attribute — the paths run/home/…, so the storey cannot be read off the first segment. It is stated as an attribute instead. The first meaning of a path is the hierarchy of aggregation, not the storey, and this is the consequence. zone—/home(the dwelling) and/site. No geometry; they bundle by path prefix.- The site —
zone /site … site:1 area:126.24andspace /out/road exterior … road:6000./outsplits into several exteriors by orientation and character. - Exterior spaces on the ground — the garden and the paths are real spaces on L1 that tile around the building. The L1 plan doubles as the site plan.
- Semi-outdoor by derivation — the garden is never declared semi-outdoor. It becomes so because it carries an
air:1boundary (a block wall) with the outside. - L-shaped unions —
X1..X2 Y1..Y3 + X2..X3 Y1..Y2. hinge:/swing:— the hand of a door.- A partial void —
boundary /home/ldk /home/void type:void. The coverage is small, so the ceiling height of the LDK stays within the storey.
What the composed version adds:
import—main.murois the base layer, declaringkoyu/name/unit/grid/levelonce, and stackingassets/site/L1/L2on top. Boundaries that cross storeys (the stair, the void) live in the base layer.asset— door and window types declared in one place, referenced by name from the openings, with instance attributes overriding.- Explicit grid-based positions —
at:X2,at:Y2+1820. Unlike a ratio these are not clamped; overshoot and it is an error.
Excerpts
A wall is a value in the spec vocabulary of a boundary, and the gate is a door on that boundary. The turn is here: the thing (a wall, a fence) becomes an attribute of a relation rather than an element.
boundary /site/garden /out/road edge:S t:120 spec:Block-wall+fence air:1 h:1200
door w:900 style:gate-hinged name:Gate
boundary /site/garden /out/w edge:W t:120 spec:Block-wall air:1 h:1200air:1 means "something is there but it blocks neither outside air nor light". That one word makes the garden semi-outdoor by derivation, so it drops out of the interior floor area and is reported separately. It also means a window looking across the garden takes no daylight penalty.
The base layer of the composed version. Consistency lives here, and layers stack on top.
grid X 0 3640 7280
grid Y 0 3640 7280
level L1 0 h:2400 slab:400
level L2 2900 h:2400 slab:500
level R 5800 slab:500
import ./assets.muro
import ./site.muro
import ./L1.muro
import ./L2.muroThe asset layer is nine lines.
asset D1 door w:900 h:2100 style:hinged name:Entrance-door
asset SD1 door w:800 h:2000 style:sliding name:Single-sliding-door
asset GT1 door w:900 h:1200 style:gate-hinged name:Gate
asset W1 window w:2600 h:2200 sill:0 name:Full-height-window
asset W2 window w:1650 h:1100 sill:900 name:Waist-height-window
asset W3 window w:2600 h:1100 sill:1100 name:ClerestoryThe first-floor layer pulls them in by name. window W1 at:X2 says only "the full-height window, at grid line X2".
boundary /home/ldk /site/garden t:150 spec:EW
window W1 at:X2 name:Full-height-window
boundary /home/hall1 /site/east t:150 spec:EW
door D1 at:Y2+1820 name:EntranceQuestions worth putting to it
Do the site figures agree
area:126.24 is a declared survey figure. It is reconciled against the derived one.
npx tsx src/cli.ts site examples/house.muro
Site /site (敷地)
Site area: declared 126.24 m2 / derived 126.24 m2
Road: /out/road (南側道路) width 6000mm / frontage 10280mm
Building footprint (horizontal projection, rough): 53.00 m2 → building coverage ratio 42%
Total floor area: 92.75 m2 → floor area ratio 73.5%The frontage of 10280 mm is the sum of the boundary segment lengths between spaces under the site zone and exterior spaces carrying road:. An external wall of the building facing the road is not frontage. What coverage ratio and floor area ratio mean is in Japanese building and regulatory terms.
Is there enough daylight
npx tsx src/cli.ts light examples/house.muro
/home/ldk LDK window 7.54 m2 / floor 39.75 m2 = 1/5.3
/home/bed1 主寝室 window 5.72 m2 / floor 26.50 m2 = 1/4.6
2 rooms in daylight scope — these are numbers, not a verdict (koyu validate applies the rule)The LDK's 7.54 m² is the full-height window (2.6 × 2.2 = 5.72 m²) plus the sill window (1.65 × 1.1 = 1.815 m²). The garden is open to the sky, so the coefficient applied was 1.0.
How do the two ways of writing it differ
stats, light and site agree exactly. The only difference is how the openings are written, and diff says so in the language of composition.
npx tsx src/cli.ts diff examples/house.muro examples/house/main.muro
+ asset D1
+ asset GT1
+ asset SD1
+ asset W1
+ asset W2
+ asset W3
± boundary /home/bed1 | /home/hall2: + door Bedroom-sliding-door SD1 w:800 h:2000 style:sliding name:Bedroom-sliding-door / − door at:0.5 (w:800)
± boundary /home/bed1 | /out/road edge:S: + window at:0.5 ref W1 / + window at:0.5 name Full-height-window
± boundary /home/hall1 | /home/ldk: + door edge:E at:0.5 ref SD1 / + door edge:E at:0.5 h 2000 / + door edge:E at:0.5 name Single-sliding-door / + door edge:E at:0.5 style sliding
± boundary /home/hall1 | /site/east: door Entrance at 0.5 → Y2+1820 / + door Entrance ref D1 / + door Entrance h 2100 / + door Entrance style hinged
± boundary /home/ldk | /site/garden: + window at:X2 W1 w:2600 h:2200 sill:0 name:Full-height-window / − window Full-height-window (w:2600 h:2200 sill:0 name:Full-height-window)
± boundary /home/ldk | /site/west: + window at:0.5 ref W2 / + window at:0.5 name Waist-height-window
± boundary /home/void | /out/road edge:S: + window Void-clerestory ref W3
± boundary /out/road | /site/garden edge:S: + door at:X2 GT1 w:900 h:1200 style:gate-hinged name:Gate / − door Gate (w:900 style:gate-hinged name:Gate)What shows up is that assets appeared, and that opening positions moved from ratios to grid references. Not line order, not formatting. Splitting the file into five is not itself a difference.