LiDAR floor plan
On a LiDAR-equipped iPhone, ARRF can reconstruct the space you walked as a floor plan and show it on the Results screen — an explorable 3D survey at the top of the screen and a top-down 2D map further down, with the floor painted by your Wi-Fi measurements.
Enable it
Section titled “Enable it”Floor-plan reconstruction is controlled by Settings → Survey & capture → Floor-plan reconstruction, which is on by default. When it’s off, the AR session runs the plain scene reconstruction and no mesh is captured or saved.
Changes take effect on the next survey start.
Generate a plan
Section titled “Generate a plan”Just run a survey with the toggle on on a LiDAR iPhone. As you walk, ARRF captures the scene; when you tap Stop, it snapshots the LiDAR mesh and downsamples it (off the main thread, behind a brief “Generating floor plan…” overlay) into a compact surface. The plan then appears on the Results screen as the 3D survey card at the top and a Floor plan card further down.
A plan is shown whenever the walk captured a surface — even a bare footprint with no readings is a legitimate result.
What the plan shows
Section titled “What the plan shows”ARRF renders the sensed surfaces directly (walls, doors, windows, floor, furniture) as a chunky voxel structure rather than guessing idealised room outlines. Key ideas:
- Structure is greyscale — walls and fixtures are told apart by lightness, not colour, so colour is free for signal.
- The floor is the heatmap — floor near your walk is painted by the selected Wi-Fi metric; floor you didn’t cover stays neutral (honestly uncovered, not invented).
- Walk samples glow — your readings render as glowing dots/cubes over the structure.
- Notes and proposals — your notes appear as numbered badges, and proposed AP or mesh-node placements are drawn dashed, never as a located AP.
How do I explore the 3D survey?
Section titled “How do I explore the 3D survey?”The 3D survey card leads the Results screen and turns slowly on its own (a freshly stopped survey drops in from overhead first). Tap it, or its Expand label, to open it full screen.
Full screen you see the sensed surfaces as greyscale voxel blocks, a translucent slab per detected level, the floor painted by the selected metric, and glowing sample cubes. AP signs appear as labelled posts with their uncertainty halos. Drag to orbit, pinch to zoom. The controls along the bottom:
| Control | What it does |
|---|---|
| Shade by menu | Recolour the floor and cubes by another metric. |
| Level switcher | Shown on multi-storey walks — see Per-level split. |
| Iso / Top / Side | Jump the camera to an isometric, overhead, or side view. |
| Walk path button | Show or hide the path you walked. |
| Replay (play) | Replay the walk along that path. |
| Legend button | Show or hide the colour legend. |
The 3D view is SceneKit-based, so it renders from a saved survey too.
Sharing the 3D view
Section titled “Sharing the 3D view”The share button in the full-screen title bar offers:
- Snapshot (PNG) — the current view as an image.
- Video (MP4) — a preset move (Orbit, Fly-in, or Overhead spin), or Record your own move: orbit, pinch and pan, then tap Stop; the move is smoothed.
- View in AR — place the model in the room around you.
- 3D model (USDZ) — the model as a file.
Ask your survey
Section titled “Ask your survey”On a device with Apple Intelligence (iOS 26 or later), an Ask your survey panel in the full-screen 3D view turns a question — “e.g. where is 5 GHz SNR under 25?” — into a filter over your samples, and the matching samples are highlighted. Answers and numbers always come from your data. It needs Settings → Experimental → Apple Intelligence features, which is on by default; without Apple Intelligence the panel is hidden.
2D map
Section titled “2D map”The Floor plan card shows a top-down column silhouette. Tap it (expand glyph) to open the full-screen 2D view with pinch-to-zoom and pan.
Per-level split
Section titled “Per-level split”If your survey climbed more than one storey, a segmented storey switcher appears:
- All — all levels stacked.
- Lower / Upper for two storeys (or L1, L2, … for three or more).
Two storeys read as Lower and Upper because the walk may be any two floors, not necessarily the ground floor. The selected level is shared between the 3D survey, the inline 2D card, and the full-screen views. Single-storey surveys show no switcher.
Export the plan
Section titled “Export the plan”Use the Image button on the Floor plan card to save the 2D plan as a PNG. Floor-plan pages (one per storey when multi-level) are also included in the PDF report.