PlayerCamera.cs

using UnityEngine;
using System.Collections;

public class PlayerCamera : MonoBehaviour {

	private float RotateX = 0;
	private float AngleX = 0;
	private float AngleY = 0;
	private float MouseY = 0;
	private float MouseX = 0;
	private float YawSpeed = 1.0f;
	private GameObject Player ;
	private GameObject MainCameraBox ;
	private GameObject MainCamera ;
	private Vector3 MainCameraPosition = new Vector3(-3f,5f,-11f) ;
	private float MainCameraPositionX = 0;
	private float CameraLerpSpeed = 6.0f;
	private Vector3 CameraPosition = new Vector3(0,0,0);
	private bool IsCameraSideL = true;

	void Awake ()
	{
		Player = this.gameObject;
		MainCameraBox = GameObject.Find("MainCameraBox");
		MainCamera = GameObject.Find("MainCameraBox/MainCamera");
	}

	// Use this for initialization
	void Start ()
	{
		//カメラ基点の初期位置合わせ
		if (MainCameraBox != null)
		{
			MainCameraBox.transform.position = Player.transform.position;
		}
		//メインカメラの初期位置合わせ
		if (MainCamera != null)
		{
			MainCamera.transform.localPosition = MainCameraPosition;
			MainCameraPositionX = MainCameraPosition.x;
		}
	}
	
	// Update is called once per frame
	void FixedUpdate ()
	{
		//マウスの移動量測定と限界設定
		MouseY = Input.GetAxis("Mouse Y");
		MouseY = Mathf.Clamp(MouseY,- 5f, 5f);
		MouseX = Input.GetAxis("Mouse X");
		MouseX = Mathf.Clamp(MouseX,- 10f, 10f);

		//カメラ基点がプレイヤー位置追従
		if (Player != null && MainCameraBox != null) 
		{
			CameraPosition = Vector3.Lerp (MainCameraBox.transform.position, Player.transform.position, CameraLerpSpeed * Time.deltaTime);
			//縦方向へは遅延追従なしにする
			CameraPosition.y = Player.transform.position.y;
			MainCameraBox.transform.position = CameraPosition;
			Player.transform.Rotate (0, MouseX * YawSpeed, 0);
			AngleY = Player.transform.eulerAngles.y;

			//カメラの旋回方向とカメラ位置調整
			if (MouseX >= 5f) {
				IsCameraSideL = false;
			} else if (MouseX <= -5f) {
				IsCameraSideL = true;
			}

			//旋回方向によってカメラ位置を切り替える
			if (IsCameraSideL) {
				MainCameraPosition.x = Mathf.MoveTowards (MainCameraPosition.x, Mathf.Abs (MainCameraPositionX) * -1f, CameraLerpSpeed * Time.deltaTime);
			} else if (!IsCameraSideL) {
				MainCameraPosition.x = Mathf.MoveTowards (MainCameraPosition.x, Mathf.Abs (MainCameraPositionX), CameraLerpSpeed * Time.deltaTime);
			}

			MainCamera.transform.localPosition = MainCameraPosition;
		



			//カメラ基点仰角操作取得
			MainCameraBox.transform.Rotate (MouseY * -1, 0, 0);

			//仰角の変換と限界設定
			if (MainCameraBox.transform.eulerAngles.x > 180) {
				RotateX = MainCameraBox.transform.eulerAngles.x - 360;
			} else {
				RotateX = MainCameraBox.transform.eulerAngles.x;
			}

			AngleX = Mathf.Clamp (RotateX, - 50, 50);

			if (AngleX < 0) {
				AngleX = AngleX + 360;
			}
		
			MainCameraBox.transform.eulerAngles = new Vector3 (AngleX, AngleY, 0);
		
		}
	}
}