//
// Unityちゃん用の三人称カメラ
// 
// 2013/06/07 N.Kobyasahi
//
using UnityEngine;
using System.Collections;


public class ThirdPersonCamera : MonoBehaviour
{
	public float smooth = 3f;		// カメラモーションのスムーズ化用変数
	Transform standardPos;			// the usual position for the camera, specified by a transform in the game
	Transform frontPos;			// Front Camera locater
	Transform jumpPos;			// Jump Camera locater
	
	// スムーズに繋がない時（クイック切り替え）用のブーリアンフラグ
	bool bQuickSwitch = false;	//Change Camera Position Quickly
	
	
	void Start()
	{
		// 各参照の初期化
		standardPos = GameObject.Find ("CamPos").transform;
		
		if(GameObject.Find ("FrontPos"))
			frontPos = GameObject.Find ("FrontPos").transform;
		
		if(GameObject.Find ("JumpPos"))
			jumpPos = GameObject.Find ("JumpPos").transform;
		
		//カメラをスタートする
		transform.position = standardPos.position;	
		transform.forward = standardPos.forward;	
	}
	
	
	void FixedUpdate ()	// このカメラ切り替えはFixedUpdate()内でないと正常に動かない
	{
		
		if(Input.GetButton("Fire1"))	// left Ctlr
		{	
			// Change Front Camera
			setCameraPositionFrontView();
		}
		
		else if(Input.GetButton("Fire2"))	//Alt
		{	
			// Change Jump Camera
			setCameraPositionJumpView();
		}
		
		else
		{	
			// return the camera to standard position and direction
			setCameraPositionNormalView();
		}
	}
	
	void setCameraPositionNormalView()
	{
		if(bQuickSwitch == false){
			// the camera to standard position and direction
			transform.position = Vector3.Lerp(transform.position, standardPos.position, Time.fixedDeltaTime * smooth);	
			transform.forward = Vector3.Lerp(transform.forward, standardPos.forward, Time.fixedDeltaTime * smooth);
		}
		else{
			// the camera to standard position and direction / Quick Change
			transform.position = standardPos.position;	
			transform.forward = standardPos.forward;
			bQuickSwitch = false;
		}
	}
	
	
	void setCameraPositionFrontView()
	{
		// Change Front Camera
		bQuickSwitch = true;
		transform.position = frontPos.position;	
		transform.forward = frontPos.forward;
	}
	
	void setCameraPositionJumpView()
	{
		// Change Jump Camera
		bQuickSwitch = false;
		transform.position = Vector3.Lerp(transform.position, jumpPos.position, Time.fixedDeltaTime * smooth);	
		transform.forward = Vector3.Lerp(transform.forward, jumpPos.forward, Time.fixedDeltaTime * smooth);		
	}
}