GodotComponentTest/entities/Player.cs

using Godot;
using System;

public class Player : KinematicBody
{
    private MovableComponent _movable;
    private Spatial _geometry;

    // Called when the node enters the scene tree for the first time.
    public override void _Ready()
    {
        _movable = (MovableComponent)FindNode("Movable", false);
        if (_movable != null)
        {
            _movable.Connect("PositionUpdated", this, nameof(OnPositionUpdated));
            _movable.Connect("OrientationUpdated", this, nameof(OnOrientationUpdated));
        }

        _geometry = (Spatial)FindNode("Geometry", false);
    }

    private void OnPositionUpdated(Vector3 newPosition)
    {
        Transform transform = Transform;
        transform.origin = newPosition;
        Transform = transform;
    }
    
    private void OnOrientationUpdated(float newOrientation)
    {
        _geometry.Transform = new Transform (new Quat(Vector3.Up, newOrientation), Vector3.Zero);
    }
}