using UnityEngine;
using System.Collections;

public class ShakeCameraOnCollisionWithTags : MonoBehaviour {
	
	public float shakeMagnitude = 1.0f;
	public float shakeTime = 1.0f;
	
	public string[] collideWithTags;
	
	private float shakeTimer = 0;
	private Vector3 originalPosition;
	
	// Update is called once per frame
	void Update ()
	{
		if(shakeTimer > 0)
		{
			Vector3 newPosition = originalPosition;
			newPosition += Random.insideUnitSphere*shakeMagnitude;
			Camera.main.transform.position = newPosition;
			shakeTimer-=Time.deltaTime;
			if(shakeTimer < 0)
			{
				Camera.main.transform.position = originalPosition;
			}
		}
	}
	
	void OnCollisionEnter( Collision collision )
	{
		foreach(string tag in collideWithTags)
		{
			if(collision.collider.tag == tag)
			{
				
				shakeTimer = shakeTime;
				originalPosition = Camera.main.transform.position;
			}
		}
	}
}