selectedEntity causing a TypeError

CesiumJS
1

I'm using Cesium 1.5, and I'm trying to select a billboard like so:

- set up a new ScreenSpaceEventHandler
- give it this input action:
function(event){
     viewer.selectedEntity.billboard.rotation = 30.0;
     console.log(viewer.selectedEntity.billboard);
}

So when I click on the billboard, it appears in the console with the change I made. Then Cesium produces an error message: TypeError: property.getValue is not a function.

For the record this happens no matter what property I try to change. Scale, color, everything causes a TypeError. Am I using incorrect syntax to get the billboard, maybe? I don't know why it doesn't seem to like rendering the change I've made.

2

In Cesium 1.6, your code will work as is, but for now, you need to manually wrap your value in a ConstantProperty. For example:

viewer.selectedEntity.billboard.rotation = new Cesium.ConstantProperty(30.0);

In order to read the property back, you need to call getValue (this will still be true in 1.6)

var rotation = viewer.selectedEntity.billboard.rotation.getValue(time);

We are making huge improvements to Entities in 1.6 (available on Feb 2nd) to make all of this easier. I’m also in the process of writing a detailed tutorial on Entities and the property system in general, which will hopefully help get everyone on the same page and paint the big picture.