How to get projectiles to bounce in AR?

Hi, I know it’s so easy to spawn something on my table in AR. Simply use the blueprint “Line Trace Tracked Objects” to get a location vector there, “Get Local to World Transform” then spawn anything.

But what I want to know is; how to make projectiles to bounce on my table?

I tried to use blueprints like “Predict Projectile Path by TraceChannel” or “Predict Projectile Path by ObjectType” to test it. But couldn’t find any TraceChannel nor ObjectType corresponding to TrackedObjects in AR. The projectiles go down bottomlessly.

So I used the blueprint “Get Trace Channel” on hit result, to know what channels are used to interact with AR environment. But after that, I realized I’ve never seen those kind of channels’ name before. I don’t know how to make collisions with those new channels. Does anyone know how to get projectiles to bounce in AR?

You can use the timeline event for this. Blueprint → Add Timeline… this will solve the problem.

Would you care to elaborate further on that?