onPlayerMove difficulties.. Stopping movement + speeding up movement.

Code:

    public void onPlayerMove(PlayerMoveEvent event) {
        Player player = event.getPlayer();
        if (!(canMove(player))){
        event.setCancelled(true);
        event.setTo(event.getFrom());
        }
		if (getRace(player).equalsIgnoreCase("elf")) {
			Vector speed = player.getVelocity();
			Vector newspeed = speed.multiply(2);
			player.setVelocity(newspeed);

		}
    }

Thats is my current curren onPlayerMove()
The first part is my attempt at stopping people from moving, but i could only make it so it teleports them back to previous location. Can I stop them from moving completely? The second part is meant to speed them up, but it makes them move incredibly slow and they can jump like an inch off the floor but im sure i multiplied the old speed by 2, please help

 

It isn't possible to freeze a player. The best you can do is return them to their old location if they move. If it is any consolation, from the server's perspective, the player is frozen.

Velocity again is an issue for the client. You could try to teleport them to the new location, but that is also going to be jumpy.

 

bah ok but plugins like superpowers make you go faster, but it takes you in whichever direction you look...

 

Hmm, well, you could look at the source (if it is available). If you send updates to the player fast enough, then it may work.