Volume Overlays

3D scalar-field visualisation on top of an AECO scene — the "interrogate the building's behaviour" complement to DaylightAnalysis's 2D work-plane heatmaps.

A VoxelGrid carries the raw field (CFD output, thermal sim, acoustic SPL, sensor interpolation, etc.) on a regular 3D lattice. The builders then bake views of that data into SceneModels that drop straight into the existing render pipeline:

• buildVolumeSlicePlane — a movable cross-section through the field, the workhorse technique for CFD / HVAC review.

Usage

import * as xeokit from "@xeokit/sdk";

// Build a synthetic field (real workflows load from CFD output).
const grid: xeokit.presentations.volumeOverlay.VoxelGrid = {
  resolution: [40, 40, 20],
  min: [-10, -10,  0],
  max: [ 10,  10, 10],
  data: makeTemperatureField(40, 40, 20),
  unit: "°C",
  valueRange: [18, 32],
  name: "Atrium temperature",
};

// Bake a horizontal slice at z = 1.5 m (work-plane height).
const slice = xeokit.presentations.volumeOverlay.buildVolumeSlicePlane(
  scene, grid, {axis: "z", position: 1.5}
);
Copy

Future visualisation techniques (isosurfaces, full volume ray-march, streamlines for vector fields) plug into the same data primitive — the VoxelGrid stays put, only the builder swaps.