@loaders.gl/3d-tiles/dist/lib/utils/s2/converters/s2-to-obb-points.js

3D Tiles, an open standard for streaming massive heterogeneous 3D geospatial datasets.

// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright vis.gl contributors
import { getS2Cell } from "../s2geometry/s2-cell-utils.js";
import { getS2Region } from "./s2-to-region.js";
import { Vector3 } from '@math.gl/core';
/**
 * Converts S2HeightInfo to corner points of an oriented bounding box
 * Can be used to constuct an OrientedBoundingBox instance
 * @param tokenOrKey {string} A string that is the cell's hex token or the Hilbert quad key (containing /)
 * @param heightInfo {S2HeightInfo} min and max height of the box
 * @returns corner points of the oriented bounding box
 */
export function getS2OrientedBoundingBoxCornerPoints(tokenOrKey, // This can be an S2 key or token
heightInfo) {
    const min = heightInfo?.minimumHeight || 0;
    const max = heightInfo?.maximumHeight || 0;
    const s2cell = getS2Cell(tokenOrKey);
    const region = getS2Region(s2cell);
    // region lng/lat are in degrees
    const W = region.west;
    const S = region.south;
    const E = region.east;
    const N = region.north;
    const points = [];
    points.push(new Vector3(W, N, min));
    points.push(new Vector3(E, N, min));
    points.push(new Vector3(E, S, min));
    points.push(new Vector3(W, S, min));
    points.push(new Vector3(W, N, max));
    points.push(new Vector3(E, N, max));
    points.push(new Vector3(E, S, max));
    points.push(new Vector3(W, S, max));
    return points;
}