I'm trying to figure out how to use setPose/setForcedPose properly, right now I'm facing some confusing behavior with it.

I've been playing with it in a simple onPlayerTick event, where I'm calling setPose for the event player. Here's what's happening:

#1:

@SubscribeEvent
public void onPlayerTick(TickEvent.PlayerTickEvent event) {
	event.player.setForcedPose(Pose.FALL_FLYING);
}

Causes player to be in the pose properly.

 

#2:

@SubscribeEvent
public void onPlayerTick(TickEvent.PlayerTickEvent event) {
	event.player.setPose(Pose.FALL_FLYING);
}

Causes player to be in the pose properly.

 

#3:

@SubscribeEvent
public void onPlayerTick(TickEvent.PlayerTickEvent event) {
	if(event.side == LogicalSide.SERVER) {
		event.player.setForcedPose(Pose.FALL_FLYING);
	}
}

Doesn't change player from STANDING pose.

#4:

@SubscribeEvent
public void onPlayerTick(TickEvent.PlayerTickEvent event) {
	if(event.side == LogicalSide.SERVER) {
		event.player.setPose(Pose.FALL_FLYING);
	}
}

Causes player to glitch rapidly between FALL_FLYING and STANDING

 

#4 doesn't make sense to me; Player also runs an update on Pose internally, which could cause the rapid switching, but #2 doesn't have the rapid switching. ForcedPose is supposed to suppress the internal updating, and keep the player in the ForcedPose, but it shows the forcedpose being ignored in #3.

I thought pose might not be being sent to the client side from the server side, but data for pose is stored in a SynchedEntityData.

I can't figure out why this is happening

 

I'm trying to use setPose from a capability, which is handled on the server side, which is where I first encountered this.

 

Players are usually controlled by the client.

https://forums.minecraftforge.net/topic/123317-1193-show-player-crawling-for-all-players/?do=findComment&comment=536039

You also need to check the "phase" of that tick event, otherwise you will do things twice per tick.

Why does this make me do swimming animations. I want to make the player pose like I'm using an Elytra?