using UnityEngine;
using System.Collections;
//---------------------
public class CameraShake : MonoBehaviour 
{
	private Transform ThisTransform = null;

	//Total time for shaking in seconds
	public float ShakeTime = 2.0f;

	//Shake amount - distance to offset in any direction
	public float ShakeAmount = 3.0f;

	//Speed of camera moving to shake points
	public float ShakeSpeed = 2.0f;

	//---------------------
	// Use this for initialization
	void Start () 
	{
		//Get transform component
		ThisTransform = GetComponent<Transform>();

		//Start shaking
		StartCoroutine(Shake());
	}
	//---------------------
	//Shake camera
	public IEnumerator Shake()
	{
		//Store original camera position
		Vector3 OrigPosition = ThisTransform.localPosition;

		//Count elapsed time (in seconds)
		float ElapsedTime = 0.0f;

		//Repeat for total shake time
		while(ElapsedTime < ShakeTime)
		{
			//Pick random point on unit sphere
			Vector3 RandomPoint = OrigPosition + Random.insideUnitSphere * ShakeAmount;

			//Update Position
			ThisTransform.localPosition = Vector3.Lerp(ThisTransform.localPosition, RandomPoint, Time.deltaTime * ShakeSpeed);

			//Break for next frame
			yield return null;

			//Update time
			ElapsedTime += Time.deltaTime;
		}

		//Restore camera position
		ThisTransform.localPosition = OrigPosition;
	}
	//---------------------
}
//---------------------