I would like to make armor that when worn and the player presses a hotkey, the armor and the player become invisible.  This ability can be toggled off by pressing the hotkey once more.

Check out the RenderLivingEvent (which is cancelable) and the forge documents on how to use Event.

That is going to involve several different things.

1) you will have to determine where you want to trap the tick events. could do in item tick, or elsewhere. Not sure if tick update works on armor or not

2) trap the key hotkey

4) prevent player render trap ( RenderPlayerEvent.Pre event), cancel it if player is invisible

3) prevent mobs from tracking when invisible  get list of current nearby entityliving and see if tracking player, set to null if they are. then trap LivingSetAttackTargetEvent and prevent any new mobs tracking.

 

17 minutes ago, aw_wolfe said:

That is going to involve several different things.

1) you will have to determine where you want to trap the tick events. could do in item tick, or elsewhere. Not sure if tick update works on armor or not

2) trap the key hotkey

4) prevent player render trap ( RenderPlayerEvent.Pre event), cancel it if player is invisible

3) prevent mobs from tracking when invisible  get list of current nearby entityliving and see if tracking player, set to null if they are. then trap LivingSetAttackTargetEvent and prevent any new mobs tracking.

 

I believe you can still set a player invisible through conventional means (Potions, setInvisible()) while a player isn't being rendered. This should help having people track the player while he's invisible.  That should save a good bit of work.

 

Edit: It also will take other things, like telling other players that the player is rendered invisible (Using packets), sending packets after using the hotkeys. 

 

Edited October 9, 20178 yr by oldcheese

just add the invisibility effect to the player in LivingUpdateEvent.