REGOLO
v1.0 · 15/10/2026

Regolo design system

The checker's drawing set, made into software: graphite linework on drafting film, redline for findings, non-photo blue for construction lines, highlighter for what is verified.

Brand

A1
REGOLO

Every IFC model, checked against its rules, with every failure routed to the person who can fix it.

The name is Italian for a straightedge, and regola means rule. The mark is a set square with a revision delta set into it: the drafting tool, and the mark a checker leaves when something needs changing.

The anti-reflex call

Category default
Dark X-ray viewport, grey docks, orange clash highlights
Second-order trap
Blueprint cyan, or Swiss black, white and red
Our scene
A Milan engineering office, mid-morning daylight, the day before a consegna
Our world
The verificatore's marked-up drawing set
Form
Ledger: square sheets, one graphite hairline, ruled tables

Colour

Restrained strategy · contrast measured live against the sheet

Red is never an action colour. It marks findings and nothing else. Graphite carries every primary action.

Status vocabulary

A3

Severity: the shape carries the meaning, so it reads without colour.

Issue numbers are drawn as revision triangles, the way a checker numbers a change.

Every state in the product, one pill each.

Where a property value came from.

Verified things are highlighted, as a checker marks a drawing with a highlighter.

Every space belongs to a storey · 18 of 18 applicable

Typography

Barlow Semi Condensed / Barlow · Chivo Mono for identifiers

Barlow descends from DIN-style technical lettering, the hand of engineering drawings. Chivo Mono is only for data: GlobalIds, issue codes, zone references.

Display · fluidEvery model, checked against the rule.
t-40 · displayPolo scolastico Via Brivio, Blocco B
t-32 · h13 of 6 requirements passing
t-22 · h2Walls declare FireRating
t-18 · h3Piano 1 · Aula 1.04
t-15 · body

The wall W-1.04-N has no wall type, so it inherits nothing. Pset_WallCommon.FireRating is missing at occurrence level, and the IDS specification requires it on every IfcWall.

t-13 · smallRun 0412 · 15/10/2026 09:42 · Archicad 27.3 · 38,4 MB
mono2O2Fr$t4X7Zf8NOew3FLOH · IDS_FAILED · Pset_WallCommon.FireRating
labelRevisione · Verificatore · Corsa

Space, shape, depth

Ledger form: 2 / 0 / 0 · 1px · hairline

Spacing, 4px base

Shape: controls 2px, sheets square. Depth: page surfaces never cast shadows. Only layers that float lift, like tracing paper laid over a drawing.

--r-ctl 2px
--r-card 0
--elev-pop

Density: controls 36px, rows 36px; 44px on touch.

Controls

B1

Buttons: primary, secondary, ghost, destructive. Sizes, icon, disabled, loading.

ISO 19650 / UNI 11337 naming
${alert}No bSDD class matches this URI. Check the class name after /class/.
${search}

Surfaces and data

B2
${search}
#FindingCodeStoreyOwnerStatus

List rows

Pset_WallCommon
IsExternal, FireRating, ThermalTransmittance, LoadBearing
Qto_WallBaseQuantities
Length 7,20 m · Height 3,60 m · NetSideArea 25,92 m²

Domain components

C1

Audit pipeline

Stations on a drawn line. A fault-isolated stage still completes.

Property set with source

IDS specifications

IDS facet editor rows

${check}IDS 1.0 · validated against ids.xsd

Spatial structure

UNI 11337-4 verification gates

Cartiglio

Checking stamp

Model viewer

three.js r147, vendored · orthographic axonometric

Hidden-line drawing: white solids, graphite edges, a construction grid in non-photo blue. Geometry the engine could not produce is drawn as a dashed ochre ghost, because the run completed anyway.

Drag to orbit · scroll to zoom · click an element

Feedback and states

D1

Loading: a plotter line scans across.

Iconography

One family, authored: 24px grid, 1.5 stroke, square caps

Motion

D3
Grammar
The pen plotter. Lines draw on, highlights swipe in, stamps press down. Nothing bounces.
UI
120–280ms, ease-out-quart, on transform, opacity and colour
Signature
The revision cloud drawing around a finding, 760ms
Scene
Camera fly-to and storey explode, 640ms, ease-out-quart
Reduced motion
Every move becomes an instant state change; clouds appear fully drawn

Bans

D4

    Assign 3 findings