【示例代码】
var cc = 0;
var dd = true;
var update = function() {
if(cc<2 && dd){
cc = cc+0.015;
if(cc > 2){
dd = false;
}
}
else if(0<cc && !dd){
cc = cc -0.015;
if(cc < 0){
dd = true;
}
}
return Cesium.Cartesian3.fromDegrees(116.4566, 39.9149, 15+cc);
};
var aa = viewer.entities.add({
position: new Cesium.CallbackProperty(update,false),
billboard: {
image: './images/location4.png',
width: 30,
height: 40,
},
name: '浮动点',
});
