Cubes_in_Motion/singleTap/SingleTap/Assets/Scripts/PlayerController.cs

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(Rigidbody2D))]
public class PlayerController : MonoBehaviour {

    public GameObject bullet;

    public float speed;

    private int bulletDirection = -1;
    private Rigidbody2D rigid;
    private GameObject[] targets;

    // Use this for initialization
    void Start() {
        targets = GameObject.FindGameObjectsWithTag("Enemy");

        rigid = GetComponent<Rigidbody2D>();
        rigid.AddForce(Vector2.up * 200);

    }

    // Update is called once per frame
    void Update() {

    }




    public void rotatePlayer() {
        rigid.velocity = Vector3.zero;
        transform.Rotate(new Vector3(0, 0, 5f));


    }

    public void movePlayer() {
        rigid.AddForce(transform.right * speed,ForceMode2D.Impulse);


    }



    GameObject findClosestTarget(GameObject[] targets) {
        GameObject tMin = null;
        float minDist = Mathf.Infinity;
        Vector3 currentPos = transform.position;
        foreach (GameObject t in targets) {
            float dist = Vector3.Distance(t.transform.position, currentPos);
            if (dist < minDist) {
                tMin = t;
                minDist = dist;
            }
        }
        return tMin;
    }

    public void shoot() {
        GameObject bulletClone = (GameObject)Instantiate(bullet, transform.position + (transform.up * bulletDirection * 0.1f), transform.rotation);
        MissileController bulletScript = bulletClone.GetComponent<MissileController>();
        bulletScript.startVelocity = transform.up * bulletDirection;
        bulletDirection = -bulletDirection;

        bulletScript.target = findClosestTarget(targets);
        bulletScript.enabled = true;

    }
}