Picking in Clustering sandcastle demo doesn't do anything

[hpinkos]

http://cesiumjs.org/Cesium/Apps/Sandcastle/index.html?src=Clustering.html&label=Showcases

I noticed this block of code in the Clustering sandcastle example:

    var handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
    handler.setInputAction(function(movement) {
        var pickedLabel = viewer.scene.pick(movement.position);
        if (Cesium.defined(pickedLabel)) {
            var ids = pickedLabel.id;
            if (Cesium.isArray(ids)) {
                for (var i = 0; i < ids.length; ++i) {
                    ids[i].label.fillColor = Cesium.Color.RED;
                }
            }
        }
    }, Cesium.ScreenSpaceEventType.LEFT_CLICK);

But no matter what you click on, pickedLabel.id is always undefined.

@bagnell what was this meant to do?

[bagnell]

pickedLabel.id should be an array of the entities in the cluster.

[rahwang]

Mentioned on the forum: https://groups.google.com/forum/?hl=en#!topic/cesium-dev/APtarX9ga64

[hpinkos]

Pretty sure this is what we want to do:

• Add an id to the default entity cluster label in EntityCluster
• Add an id to the custom style billboard in the Sandcastle example