/** A spatial region described by a bounding sphere, used to classify a reality model. */ interface ClassifiedRegion { /** The center point of the bounding sphere. */ center: Point3d; /** The radius of the bounding sphere. */ radius: number; /** The name of the region, to serve as a tooltip when the user hovers over the classified region of the reality model. */ name: string; /** The color in which to draw the classified region of the reality model. */ color: ColorDef; } /** Classify spherical regions of a reality model, either by planar projection (`classifyByVolume=false`) or by bounding volume (`classifyByVolume=true`). */ export function classifyRealityModel(model: ContextRealityModelState, regions: ClassifiedRegion[], classifyByVolume: boolean): void { const modelId = model.iModel.transientIds.getNext(); // Create a GraphicBuilder to define the classifier geometry. const builder = IModelApp.renderSystem.createGraphic({ type: GraphicType.Scene, computeChordTolerance: () => 0.01, pickable: { modelId, id: modelId, isVolumeClassifier: classifyByVolume, }, }); const regionIdsAndNames: Array<{ name: string, id: Id64String }> = []; for (const region of regions) { // Assign a unique Id to each region, so we can identify them when the user interacts with them in a viewport. const regionId = model.iModel.transientIds.getNext(); regionIdsAndNames.push({ id: regionId, name: region.name }); // Add a sphere representing the region. builder.setSymbology(region.color, region.color, 1); builder.activatePickableId(regionId); builder.addSolidPrimitive(Sphere.createCenterRadius(region.center, region.radius)); } // Create a tile tree reference to provide the graphics at display time. const tileTreeReference = TileTreeReference.createFromRenderGraphic({ graphic: builder.finish(), modelId, iModel: model.iModel, getToolTip: async (hit) => Promise.resolve(regionIdsAndNames.find((x) => x.id === hit.sourceId)?.name), }); // Direct the reality model to use our tile tree reference for classification. model.classifiers.activeClassifier = { tileTreeReference, name: "Regions", flags: new SpatialClassifierFlags(undefined, undefined, classifyByVolume), }; }