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describe.ts

src/scene/describe.ts

// Single source for hover-tooltip text, so 2D and 3D always label/measure the
// same element the same way (they can't drift). Each helper returns the label
// and a dimensions string; the views add the cursor position.

import { polygonArea, polygonBounds, wallLength } from './geometry';
import type { Fixture, Opening, Room, Scene, Wall } from './schema';
import { formatArea, formatLength, type UnitSystem } from './units';

export type Described = { label: string; dims: string };

/** A selected element: which one (id) + its description. */
export type Selected = Described & { id: string };

/** 2D selection anchored at a scene-space point (re-projected to screen each render). */
export type Selected2D = Selected & { sx: number; sy: number };

/** 3D selection anchored at a world-space point (tracked by <Html> as the camera moves). */
export type Selected3D = Selected & { point: [number, number, number] };

/** Highlight color for the selected element (fill or lines), both 2D and 3D. */

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