#how do i schedule something to happen after x ticks

4 messages · Page 1 of 1 (latest)

formal hatch
#

I want to do an action after a number of ticks while doing something. If you stop during that time the action doesnt happen. How do i do that?

pseudo geyser
#

Set a timer:

weak questBOT
#

Fabric itself does not include APIs to schedule something in the future.

DO NOT use threads or java.util.Timer. (This can cause a crash!) Instead:

  • If you are making a block do something in the future: world.scheduleBlockTick + override scheduledTick in your Block.
  • If you are making a custom tickable stuff (usually block entity/entity) do something in the future/periodically: see below, but instead of Mixin just implement yourself
  • If you are making a vanilla tickable thing (world, server, etc) do something in the future/periodically: use the following mixin.
@Mixin(StuffToTick.class) // ServerWorld, MinecraftServer, etc
public class StuffTimer implements StuffTimerAccess {
    @Unique
    private long ticksUntilSomething;

    @Inject(method = "tick", at = @At("TAIL"))
    private void onTick(CallbackInfo ci) { // Fix parameters as needed
        if (--this.ticksUntilSomething == 0L) {
            doSomething();
            // If you want to repeat this, reset ticksUntilSomething here.
        }
    }

    @Override
    public void yourmod_setTimer(long ticksUntilSomething) {
        this.ticksUntilSomething = ticksUntilSomething;
    }
}

public interface StuffTimerAccess {
    void yourmod_setTimer(long ticksUntilSomething);
}

Usage:

MinecraftServer server;
((StuffTimerAccess) server).yourmod_setTimer(100L); // do something after 100 ticks
pseudo geyser
#

If you're using an item, there's probably a better way.