//创建面 支持球面和平面坐标
var polygon = viewer.entities.add({
polygon: {
hierarchy: {
positions: Cesium.Cartesian3.fromRadiansArray([ ]),
},
outline: true,
outlineColor: Cesium.Color.RED,
outlineWidth: 3,
material: Cesium.Color.YELLOW,
},
});
var pyPositions = polygon.polygon.hierarchy.getValue(Cesium.JulianDate.now()).positions;
//中心点
var pCenter = Cesium.BoundingSphere.fromPoints(polyPositions).center;