Dynamic label text

CesiumJS
1

Hi,

Is it possible to use CallbackProperty on a label’s text?

Something like:

var labels = viewer.scene.primitives.add(new Cesium.LabelCollection());
labels.add({
position: position,

//this works
//text: “blah”,

//this doesn’t work
text : new Cesium.CallbackProperty(function() {
return “blah”;
}, false),

pixelOffset: new Cesium.Cartesian2(10, -10)
});

``

Thank you,

Fidel

2

Hi Fidel,

Callback properties only work for entities. This code should do what you need:

viewer.entities.add({

position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),

label : {

text : new Cesium.CallbackProperty(function() {

return “blah”;

}, false),

}

});

``

hope that helps,

  • Rachel
3

Thanks Rachel, that looks promising but it seems to ignore my pixelOffset.

viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),
label : {
text : new Cesium.CallbackProperty(function() {
return “blah”;
}, false),
},
** pixelOffset****: new Cesium.Cartesian2(10, -10) //<----------- this line seems to be** ignored
});

``

4

Fidel, pixelOffset needs to be a property on the label object, you have it at the top level.

5

You guys are the best. Thank you very much