I have joined in the form of an "new Cesium.Primitive",now How do I add billboards?

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

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

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

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


Here’s an example of adding billboards. You can also add the billboard to a BillboardCollection for better performance.