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[AidenEsco]

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Edited March 9, 2020 by AidenEsco

[UberAffe]

Unless you are physically simulating the pressing of the wasd keys you will probably want to handle  this serverside.

[coolAlias]

Setting motion client side would actually be a suitable approach, as that is where player motion is handled for the most part anyway. You don't have to simulate the key press itself to simulate the result of the key press

 

That all said, the major issue is going to be path-finding. I suggest you take a look at the various pathing / move helper classes used in mob AI and consider using that as the basis for moving the player. This is not a trivial exercise, especially for a new coder, but at least Mojang has done most of the work for you.

 

Another big issue is: what do you expect the player to be doing while you affect their motion? Will they still be in control, or is this supposed to be some kind of cinematic-like effect where the player sits back and watches as Steve/Alex gets moved around?