Math

How to check for any player looking player?

What?

Compare $player->getDirectionVector() and $target->subtract($player)->normalize().

Can i setup for event?

Exactly this: $player->getDirectionVector() in event?

You can do with PlayerMoveEvent, but this is likely to lag the server. Better check it like per 5 ticks.

I am trying to rewrite the minecombat to multoworld. I was able to make the gun Particle. But i cant to do checkinh

Checkning

I try PlayerIntaractEvent