using UnityEditor;

namespace VRM
{
    [CustomEditor(typeof(VRMFirstPerson))]
    class VRMFirstPersonEditor : Editor
    {
        void OnSceneGUI()
        {
            var component = target as VRMFirstPerson;

            var head = component.FirstPersonBone;
            if (head == null)
            {
                return;
            }

            EditorGUI.BeginChangeCheck();

            var worldOffset = head.localToWorldMatrix.MultiplyPoint(component.FirstPersonOffset);
            worldOffset = Handles.PositionHandle(worldOffset, head.rotation);

            Handles.Label(worldOffset, "FirstPersonOffset");

            if (EditorGUI.EndChangeCheck())
            {
                Undo.RecordObject(component, "Changed FirstPerson");

                component.FirstPersonOffset = head.worldToLocalMatrix.MultiplyPoint(worldOffset);
            }
        }
    }
}