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DAGeVu Modeller — User Guide

Work in progress. The DAGeVu modeller is an early, spine-proven authoring surface — this guide is deliberately a short intro plus an index of the toolbar icons. Expect it to grow as the modeller does.

What it is

DAGeVu is a browser BIM authoring surface that sits beside the read-only viewer. Instead of editing a file, you apply operations — insert a component, sketch a profile, extrude, sweep, fillet — and the model is a deterministic fold of that signed operation log. The op-log is the feature tree: every action is recorded, replayable, and reversible, and the same signed-log idea drives the Kernel-ERP engine.

Open it: red1oon.github.io/bim-ootb/viewer/modeller.html (desktop — the B-rep kernel is heavy). The Home button returns to the Matrix landing.

DAGeVu Modeller — the INSERT · BOM CATALOG panel open (left), the authored scene on the grid, the ⋯ toolbar pill rail at the bottom‑right, and the op-log history scrubber along the bottom

Your first insert — the BOM catalog

The fastest way to build is to assemble, not draw. Tap the Insert tool (the cube icon in the toolbar — open the ⋯ pill rail at the bottom‑right if the pills are collapsed) to open the INSERT · BOM CATALOG panel on the left:

  1. Find a component. Type in search parts…, or narrow with the filter chips — All · Structure · Openings · Furniture · Sets. The catalog is extracted from the real component library (component_library.db plus the per-building BOMs), so what you see are actual parts and pre-built assemblies.
  2. Pick a part — or a whole set. Single parts drop one element. Sets are assemblies (whole BOM sets) grouped by level — Buildings · Floors · Rooms · Sets · Items — each collapsible, with a part-count badge (e.g. Duplex Single Half-Unit, DX Level 1 Structured). Pick one to drop the entire recipe at once.
  3. Aim and place. The status line prompts "aim on the grid, R to rotate, click to place". Move the cursor over the grid to position the ghost preview; press R to rotate (the Rotate angle in the panel footer updates); set Elev (metres) to lift it to a storey height; then click to drop it.
  4. It's a signed op. The placement lands as one operation in the op-log — visible on the history scrubber at the bottom and fully undoable (Ctrl+Z). An assembly drops as a single grouped op of N parts, each seated and oriented from the recipe — e.g. doors and windows take their host wall's facing automatically, rotating with the wall rather than landing flat.

From there, use the toolbar pills to refine: move/rotate a placed object, sketch and extrude new geometry, cut, sweep an MEP run, or bump a component's level of detail. The Outliner panel (left) lists the placed elements; collapse it with its chevron to free up the canvas.

The toolbar — icon index

The toolbar is a ⋯ pill rail at the bottom-right: tap ⋯ to fan the icon-only glass pills up, and hover any pill for its name. The ? Help pill opens the TOOLBAR · PILL REGISTRY — the live list of every tool's icon, name, and keyboard shortcut (Esc always cancels the current mode).

Icon Does
⋯ Toolbar Fan the toolbar pills open / closed (bottom-right)
? Help Toolbar & shortcuts — the live pill registry
Home Back to the Matrix landing
Fit Zoom to fit — frames the selection, or the whole scene (F)
Iso Cycle the view: Iso ⇄ Top
Wall Draw a wall
Opening Place an opening (door / window) in a wall
Grid Show / add a construction grid
Move Grid Drag a gridline — attached walls recompose with it
Move Move the selected object — drag an axis handle or nudge with the arrow keys (M)
Sketch Start a 2D sketch
Extrude Push a sketch profile into a solid
Axis Set the constraint intent the solver enforces on the sketch
Cut Boolean-cut one solid with another
Route Define a route to sweep a profile along (e.g. an MEP run)
Sweep Run Sweep the profile along the route
Fillet Round a selected solid's picked edges
Apply Commit the pending fillet / chamfer
Insert Insert a library component — assemble, don't draw (catalog + BOM-assembly drop)
LOD 200 Refine the selected component's level of detail (same signed row)
IFC Export the authored model as IFC4
Undo Undo the last operation (Ctrl+Z)
Redo Redo (Ctrl+Shift+Z)
Delete Delete the selection (Del)
Clear Empty the scene
Sound Toggle authoring sound feedback
Connect Connect Scene — share selection / timeline with the Viewer & ERP (opt-in; surfaces stay separate)

Part of BIM OOTB. Copyright (c) 2025–2026 Redhuan D. Oon. MIT Licensed.