how to achieve the effect of encountering ground rebound by using particle system





Can you explain a bit more about what you’re trying to do?

Are you asking how to make particles fall, and then hit the ground to stop and bounce? If so, I think there’s no easy way to do it with the built in features in CesiumJS. This is a good reference on the particle system:

You can potentially get the height of the terrain and make the particle stop/disappear at that spot, but if you’re thinking like snow particles that would roll down a hill, you’d need a full physics engine for that.