CarmenSandiego/Assets/UdonSharp/ViewTabletSpawner.cs

using UdonSharp;
using UnityEngine;
using VRC.SDKBase;


[UdonBehaviourSyncMode(BehaviourSyncMode.None)]
public class ViewTabletSpawner : UdonSharpBehaviour
{
	[SerializeField] private Transform _ViewTabletHeadRoot;
	[SerializeField] private Transform _ViewTabletHeadOffset;
	[SerializeField] private Transform _ViewTablet;

	private bool _FollowPlayerHead = false;
	private float _PreviousHeadYRotation = 0.0f;


	void Update()
	{
		VRCPlayerApi LocalPlayer = Networking.LocalPlayer;
		_PreviousHeadYRotation = LocalPlayer.GetBoneRotation(HumanBodyBones.Head).eulerAngles.y;

		if (_FollowPlayerHead)
		{
			_ViewTabletHeadRoot.position = LocalPlayer.GetBonePosition(HumanBodyBones.Head);
		}
		else
		{
			_ViewTabletHeadRoot.localPosition = Vector3.zero;
		}
	}

	public override void OnPlayerRespawn(VRCPlayerApi Player)
	{
		if (Player.isLocal)
		{
			Vector3 HeadRotation = Networking.LocalPlayer.GetBoneRotation(HumanBodyBones.Head).eulerAngles;
			HeadRotation.x = HeadRotation.z = 0.0f;
			float DeltaY = HeadRotation.y - _PreviousHeadYRotation;
			HeadRotation.y = _ViewTabletHeadRoot.eulerAngles.y + DeltaY;
			_ViewTabletHeadRoot.rotation = Quaternion.Euler(HeadRotation);
		}

		base.OnPlayerRespawn(Player);
	}


	public void SpawnAtLocalPlayerHead()
	{
		_ResetTabletPosition();

		Vector3 HeadRotation = Networking.LocalPlayer.GetBoneRotation(HumanBodyBones.Head).eulerAngles;
		HeadRotation.x = HeadRotation.z = 0.0f;
		_ViewTabletHeadRoot.rotation = Quaternion.Euler(HeadRotation);

		_FollowPlayerHead = true;
	}

	public void Despawn()
	{
		_ResetTabletPosition();
		_FollowPlayerHead = false;
	}


	private void _ResetTabletPosition()
	{
		_ViewTablet.localPosition = Vector3.zero;
		_ViewTablet.localRotation = Quaternion.identity;
	}
}