using UnityEngine;

namespace UnityStandardAssets.Cameras
{
	public class LookatTarget : AbstractTargetFollower
	{
		[SerializeField]
		private Vector2 m_RotationRange;

		[SerializeField]
		private float m_FollowSpeed = 1f;

		private Vector3 m_FollowAngles;

		private Quaternion m_OriginalRotation;

		protected Vector3 m_FollowVelocity;

		protected override void Start()
		{
			base.Start();
			m_OriginalRotation = base.transform.localRotation;
		}

		protected override void FollowTarget(float deltaTime)
		{
			base.transform.localRotation = m_OriginalRotation;
			Vector3 vector = base.transform.InverseTransformPoint(m_Target.position);
			float value = Mathf.Atan2(vector.x, vector.z) * 57.29578f;
			value = Mathf.Clamp(value, (0f - m_RotationRange.y) * 0.5f, m_RotationRange.y * 0.5f);
			base.transform.localRotation = m_OriginalRotation * Quaternion.Euler(0f, value, 0f);
			vector = base.transform.InverseTransformPoint(m_Target.position);
			float value2 = Mathf.Atan2(vector.y, vector.z) * 57.29578f;
			value2 = Mathf.Clamp(value2, (0f - m_RotationRange.x) * 0.5f, m_RotationRange.x * 0.5f);
			m_FollowAngles = Vector3.SmoothDamp(target: new Vector3(m_FollowAngles.x + Mathf.DeltaAngle(m_FollowAngles.x, value2), m_FollowAngles.y + Mathf.DeltaAngle(m_FollowAngles.y, value)), current: m_FollowAngles, currentVelocity: ref m_FollowVelocity, smoothTime: m_FollowSpeed);
			base.transform.localRotation = m_OriginalRotation * Quaternion.Euler(0f - m_FollowAngles.x, m_FollowAngles.y, 0f);
		}
	}
}