First of all, I am not the one to judge but this is an unnecessarily long way of doing this.
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You do not need to get class → get actor of class and so on, you can simply cast the Other Actor to the player character:
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Or you can make use of Tags and add a simple “Player” tag to the Character:
Now to answer OP’s question, if I got it right, he/she wants a door that will move left/right based on the distance between the player and the door.
To accomplish this, you might do something like this:
Please note that this still will require adjusting to get the desired effect you’d like.
For example, you can use the distance between player & door to calculate the speed of the movement of the door using Lerp:
But as I said, this will still require some adjusting and testing to get the desired effect. However I hope it serves as a valuable starting point!
Good luck.