1. A concise explanation of the problem you’re experiencing.
I add satellite orbit from a czml file, and add cylinder under each satellite using the entity’s position CallbackProperty. But when there is more than one satellite in czml file, the function only render the last satellite’s cylinder in czml file, please help…
2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.
var dataSource = new Cesium.CzmlDataSource();
viewer.dataSources.add(dataSource);
dataSource.process(‘./SampleData/satellite1.czml’).then(function() {
console.log(dataSource.entities.values.length);
var saEntity;
var nowPos = ;
for(var i=0;i<dataSource.entities.values.length;i++){
saEntity = dataSource.entities.values[i];
var isConstant = false;
var tmp = i;
viewer.entities.add({
id: tmp,
name: tmp,
position : new Cesium.CallbackProperty(function(time) {
nowPos[i] = Cesium.Ellipsoid.WGS84.cartesianToCartographic(saEntity.position.getValue(time));
console.log(tmp + “:” + time);
//if(i==0){ console.log(tmp + “:”+ time + “pos:” + nowPos[i]); }
return Cesium.Cartesian3.fromDegrees(Cesium.Math.toDegrees(nowPos[i].longitude),Cesium.Math.toDegrees(nowPos[i].latitude),0,Cesium.Ellipsoid.WGS84);
}, isConstant),
cylinder: {
length: new Cesium.CallbackProperty(function(time) {
nowPos[i] = Cesium.Ellipsoid.WGS84.cartesianToCartographic(saEntity.position.getValue(time));
//if(i==0){ console.log(tmp + “:”+ time + “pos:” + nowPos[i]); }
return nowPos[i].height;
}, isConstant),
topRadius: 0.0,
bottomRadius: 300000.0,
material: Cesium.Color.RED.withAlpha(0.2),
}
});
}
});
3. Context. Why do you need to do this? We might know a better way to accomplish your goal.
add cylinder under each satellite using the entity’s position CallbackProperty
4. The Cesium version you’re using, your operating system and browser.
cesium 1.51 ,chrome 70
