Drill picking not selecting billboards

CesiumJS
1

1. A concise explanation of the problem you're experiencing.

I cannot pick or drill pick billboards that are displaying on my globe.

2. A minimal code example. If you've found a bug, this helps us reproduce and repair it.

I try to pick them by doing:
var objects = scene.drillPick(new Cesium.Cartesian2(event.clientX, event.clientY));
which returns an array length 0.

I think it may be because I am just adding them to a billboard collection?
I have:
billboards = viewer.cesiumWidget.scene.primitives.add(new Cesium.BillboardCollection());
and then I add them by:
billboards.add ({
position: cartesian,
image: pinBuilder.fromColor(Cesium.Color.RED, 30).toDataURL(),
verticalOrigin: Cesium.VerticalOrigin.BOTTOM
});

3. Context. Why do you need to do this? We might know a better way to accomplish your goal.

I am simply trying to pick a billboard that appears on my globe.

4. The Cesium version you're using, your operating system and browser.

Cesium 1.47, Centos, Firefox

2

Ok, I think I figured it out! I needed to do event.position, not event.clientX or event.clientY.

3

So now it is recognizing that it has picked the object, but it is not recognizing that it is in the collection (when I do billboards.contains(object)) or that I have attached a boolean property as suggested in https://groups.google.com/forum/#!topic/cesium-dev/UU5Kd52TIKY

4

Fixed it by doing object.primitive!

5

Glad you figured it out! Here’s a complete example for picking billboards in a collection for anyone who’s wondering. (Hover over the billboards to highlight them)