Last reviewed 30 Apr 2026
Applies to
UdonSharp VRChat Worlds SDK
Difficulty Beginner

Simple Door Toggle (Synced)

This script opens and closes a door for everyone by rotating a door transform between two angles.

Category: Networking Systems

UdonSharp Script

using UdonSharp;
using UnityEngine;
using VRC.SDKBase;
using VRC.Udon;

public class SimpleDoorToggleSynced : UdonSharpBehaviour
{
    [Header("Door pivot transform")]
    public Transform doorPivot;

    [Header("Closed/Open Y rotation")]
    public float closedY = 0f;
    public float openY = 90f;

    [UdonSynced] private bool isOpen;

    private void Start()
    {
        ApplyDoorRotation();
    }

    public override void Interact()
    {
        VRCPlayerApi localPlayer = Networking.LocalPlayer;
        if (localPlayer == null || doorPivot == null)
        {
            return;
        }

        Networking.SetOwner(localPlayer, gameObject);
        isOpen = !isOpen;
        ApplyDoorRotation();
        RequestSerialization();
    }

    public override void OnDeserialization()
    {
        ApplyDoorRotation();
    }

    private void ApplyDoorRotation()
    {
        if (doorPivot == null)
        {
            return;
        }

        float targetY = isOpen ? openY : closedY;
        Vector3 euler = doorPivot.localEulerAngles;
        euler.y = targetY;
        doorPivot.localEulerAngles = euler;
    }
}

License:

Unity Setup

  1. Create a door object with a correct hinge pivot.
  2. Create a handle/button object with VRC_Interactable.
  3. Add this script to the interactable object.
  4. Assign the door transform to doorPivot.
  5. Set closedY and openY.

Notes

  • This basic version snaps instantly between states.
  • For smooth animation, lerp rotation over time in Update.

Extra Tips and Troubleshooting

Tips and Tricks

  • Keep pivot placement correct before scripting.
  • Add sound and indicator lights for better feedback.

Troubleshooting

  • If door rotates oddly, verify local pivot axis and angle direction.

Related Content

Prefab Setup Notes

Import the prefab or script into a throwaway test scene before adding it to a live world. Confirm inspector references, ownership behavior, sync, triggers, UI hooks, and audio or object links before moving it into the production scene.

Testing Checklist

  • Test once as a local player and again with a second client or late joiner if the behavior can affect more than one player.
  • Confirm ownership, sync, trigger zones, UI references, and audio or object references are assigned intentionally.
  • Check desktop and VR interaction distance so players can actually use the feature in context.
  • Keep a backup of the scene before changing prefabs, UdonBehaviours, or serialized references.

Related Pages

Official References