Cesium获取3dtileset的包围盒各顶点坐标

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 blog.csdn.net/STANDBYF/article/details/135012273 * @ref community.cesium /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; }