[1.12.2] Make a player unable to jump?

[Differentiation]

Hey!

I wanted to be able to make the player unable to jump, is there a way to do this? Is it just canceling LivingJumpEvent?

 

And apart from that, what if I wanted to make the player unable to move (W, A, S, D)?

Any suggestions are welcome.

Thank you!

Edited January 15, 2018 by Differentiation

[Draco18s]

Look at the jump boost potion and the slowness potion.

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Negative levels decrease jump height and increase fall damage (which also causes the player to start taking damage from short falls that would normally do no damage); extreme negative levels will eliminate all jumping ability and will cause damage even when stepping off a slab.

 

[Differentiation]

11 minutes ago, Draco18s said:

Look at the jump boost potion and the slowness potion.

Quote

But that shows the effect icons when I interact with my inventory...

I mean, I know how to rid the particles of the effect, but is there a way to rid the icon in the inventory so that the player will have no idea they have a potion effect on them?

[Draco18s]

Look at how the potion accomplishes what it does.