using UnityEngine;

namespace Kirurobo {
	/// <summary>
	/// 使附加的对象以恒定速度进行偏航旋转
	/// </summary>
	public class AutoRotator : MonoBehaviour {
		/// <summary>
		/// 旋转速度 [度/秒]
		/// </summary>
		public float angularVelocity = 90f;

		/// <summary>
		/// 旋转轴（偏航旋转，方向向上）
		/// </summary>
		Vector3 rotationAxis = Vector3.up;

		/// <summary>
		/// 初始姿态
		/// </summary>
		Quaternion initialLocalRotation;

		// 用于初始化
		void Start () {
			// 记录初始姿态
			initialLocalRotation = transform.localRotation;
		}
	
		// 每帧调用 Update
		void Update () {
			var rotation = Quaternion.Euler(0f, Time.time * angularVelocity, 0f);
			transform.localRotation = initialLocalRotation * rotation;
		}
	}
}