[SOLVED] 1.16.5 Schedule Block Update

[DietmarKracht]

I want to know how i can schedule changes to a blockstate after a certain amount of time. I want to change the blocks state of my block on right click after some seconds to render an animation during this time. How would i approach this?

Edited May 24, 2021 by DietmarKracht

[kiou.23]

any reason why using Java threads wouldn't work?

you could do:

new Thread(() -> {
  Thread.sleep(/* how long to wait in miliseconds */)
  /* do your logic here */
}).start();

 

[DietmarKracht]

So i solved this by using blockstates for the intermediate state where the block would not update and schedule a tick after the given amount of time. Then in the tick() method of the block i do my logic when the blockstate matches my intermediate state.

[Draco18s]

29 minutes ago, kiou.23 said:

any reason why using Java threads wouldn't work?

you could do:

new Thread(() -> {
  Thread.sleep(/* how long to wait in miliseconds */)
  /* do your logic here */
}).start();

 

"Freeze entire game while we wait for this block to update."
Yes, that's exactly what we want.

[kiou.23]

42 minutes ago, Draco18s said:

"Freeze entire game while we wait for this block to update."
Yes, that's exactly what we want.

Doesn't the thread run asynchronously? If not, my bad then, I apologize for the bad advice

[Draco18s]

The main server thread? Hell no. You sleep the main server thread, then water stops flowing, redstone stops updating, mobs stop moving, and players get disconnected due to a timeout.

Thread.Sleep() is almost never the solution to "I need to wait for something." Never never never never.

Edited May 24, 2021 by Draco18s

[diesieben07]

12 hours ago, kiou.23 said:

Doesn't the thread run asynchronously? If not, my bad then, I apologize for the bad advice

Draco isn't correct here since you are spawning a new thread. However it is still terrible advice.

• Spawning a new thread just to sleep is an absolute waste of system resources. Threads are huge beasts.
• You cannot interact with the game from a separate thread as most of Minecraft's code is not threadsafe.

 

13 hours ago, DietmarKracht said:

So i solved this by using blockstates for the intermediate state where the block would not update and schedule a tick after the given amount of time. Then in the tick() method of the block i do my logic when the blockstate matches my intermediate state.

This is the correct solution.

[Draco18s]

Ah yes, it is a newly spawned thread. I just saw the Thread.sleep part of things, because that's so commonly suggested and/or tried and "didn't work."