Cesium 获取 3dtileset的包围盒各顶点坐标

/*** 获取 3dtileset的包围盒各顶点坐标, z 方向取高度最低的位置* @param {*} tileset* @param {*} options* @returns* @ref https://blog.csdn.net/STANDBYF/article/details/135012273* @ref https://community.cesium.com/t/accurate-bounding-box-for-3d-tiles/5890/10*/
export function getTilesetBoudingBoxPoints(tileset, options = {}) {const { center, halfAxes } = tileset._root._boundingVolume._orientedBoundingBox;const pointsVec3 = [];// 获取三个轴的位置const x = new Cartesian3();const y = new Cartesian3();const z = new Cartesian3();Matrix3.getColumn(halfAxes, 0, x);Matrix3.getColumn(halfAxes, 1, y);Matrix3.getColumn(halfAxes, 2, z);const halfXNegative = new Cartesian3();const halfXPositive = new Cartesian3();Cartesian3.subtract(center, x, halfXNegative)Cartesian3.add(center, x, halfXPositive)Cartesian3.subtract(halfXNegative, z, halfXNegative)Cartesian3.subtract(halfXPositive, z, halfXPositive)pointsVec3.push(Cartesian3.add(halfXNegative, y, new Cartesian3()))pointsVec3.push(Cartesian3.subtract(halfXNegative, y, new Cartesian3()))pointsVec3.push(Cartesian3.subtract(halfXPositive, y, new Cartesian3()))pointsVec3.push(Cartesian3.add(halfXPositive, y, new Cartesian3()))const pointsLL = [];pointsVec3.forEach(item=>{const ll = Cartographic.fromCartesian(item);pointsLL.push(Math.toDegrees(ll.longitude),Math.toDegrees(ll.latitude),)})return pointsLL;
}