Set rotation of an players, so it looks towards another player

I have the $player1 var and $player2 var. Now i want that $player1 looks at $player2. How to to that?
I tried setRotation, but i didnt figure out, how to set the rotation properly...

 

Check how BlockPets does it: https://github.com/BlockHorizons/Bl...rizons/BlockPets/pets/WalkingPet.php#L66-#L67
Extracted code:

PHP:

$x = $petOwner->x + $this->xOffset - $this->x;
$y = $petOwner->y - $this->y;
$z = $petOwner->z + $this->zOffset - $this->z;
$this->yaw = rad2deg(atan2(-$x, $z));
$this->pitch = rad2deg(-atan2($y, sqrt($x * $x + $z * $z)));


Yaw and pitch is what you need. You can ignore the xOffset and zOffset I think, setRotation() should handle that.