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;
            }
        }
    }
}