HelicopterControl.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class HelicopterControl : MonoBehaviour {

    public float speed = 0f;
    private Rigidbody2D rigidBody;
    private Animator myAnimator;
    private Collider2D collider_t;
    public GameObject launch;
    public GameObject spawnerReference;
    private AudioSource sound;
    private bool killSound;

    // Variables for releasing package
    float rand;
    float toReleasePackage;
    bool releasePackage;
    int rand1;
    bool packageReleased;

    // Variables for releasing bomb
    float bomberRandomVar; 
    bool ifBomber;
    float whereToReleaseBomb;
    bool bombReleased;
    public GameObject bombPrefab;
    public GameObject bombInstance;

    public static float fracPara = 0.2f;
    public static float fracBomb = 0.1f;

    public bool comesFromLeft;


	// Use this for initialization
	void Start () {
        speed = 5f;

        myAnimator = gameObject.GetComponent<Animator>();
        rigidBody = GetComponent<Rigidbody2D>();
        collider_t = GetComponent<Collider2D>();
        rand1 = Random.Range(0, 2);
        if(rand1 == 0)
            rand = Random.Range(0.2f, 0.35f);
        else
            rand = Random.Range(0.65f, 0.8f);
        toReleasePackage = Random.Range(0f, 1f);

        releasePackage = false;
        if (toReleasePackage < fracPara)
            releasePackage = true;

        bomberRandomVar = Random.Range(0f, 1f);
        if (bomberRandomVar < fracBomb)
        {
            ifBomber = true;
            bombReleased = false;
            myAnimator.SetBool("ifBomber", true);
            whereToReleaseBomb = Random.Range(0.25f, 0.75f);

        }
        else
            ifBomber = false;
        killSound = false;
	}

    void assignDirection(bool a)
    {
        comesFromLeft = a;
        if(!comesFromLeft)
        {
            SpriteRenderer tempSpriteRenderer = GetComponent<SpriteRenderer>();
            tempSpriteRenderer.flipX = true;
            if(ifBomber)
            {
                //tempSpriteRenderer.flipX = true;
            }
        }
            
            
    }
	
	// Update is called once per frame
	void Update () {

        if(comesFromLeft)
            rigidBody.velocity = new Vector2(speed, 0);
        else
            rigidBody.velocity = new Vector2(-speed, 0);
        // Calculate threshold point
        Vector3 point = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width * rand, 0, 0));
        // Script for releasing paratrooper
        if ((releasePackage) & (!SpawningScript.stopGame) & (spawnerReference.activeSelf))
        {
            if ((rigidBody.transform.position.x >= point.x) & !packageReleased & comesFromLeft)
            {
                GameObject newLaunch = (GameObject) Instantiate(launch, new Vector3(rigidBody.transform.position.x, rigidBody.transform.position.y - 0.5f, rigidBody.transform.position.z), Quaternion.identity);
                //Sprite Rendering
                SpriteRenderer m_SpriteRenderer = newLaunch.GetComponent<SpriteRenderer>();
                if(rand >= 0.65f)
                    m_SpriteRenderer.flipX = true;
                Physics2D.IgnoreCollision(newLaunch.GetComponent<Collider2D>(), GetComponent<Collider2D>());
                packageReleased = true;
            }
            if ((rigidBody.transform.position.x <= point.x) & !packageReleased & !comesFromLeft)
            {
                GameObject newLaunch = (GameObject)Instantiate(launch, new Vector3(rigidBody.transform.position.x, rigidBody.transform.position.y - 0.5f, rigidBody.transform.position.z), Quaternion.identity);
                //Sprite Rendering
                SpriteRenderer m_SpriteRenderer = newLaunch.GetComponent<SpriteRenderer>();
                if (rand >= 0.65f)
                    m_SpriteRenderer.flipX = true;
                Physics2D.IgnoreCollision(newLaunch.GetComponent<Collider2D>(), GetComponent<Collider2D>());
                packageReleased = true;
            }
        }
        if(ifBomber)
        {
            point = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width * whereToReleaseBomb, 0, 0));
            if ((rigidBody.transform.position.x >= point.x) & !bombReleased & comesFromLeft)
            {
                bombInstance = (GameObject)Instantiate(bombPrefab, new Vector3(rigidBody.transform.position.x, rigidBody.transform.position.y - 0.5f, rigidBody.transform.position.z), Quaternion.identity);
                bombReleased = true;
            }
            if ((rigidBody.transform.position.x <= point.x) & !bombReleased & !comesFromLeft)
            {
                bombInstance = (GameObject)Instantiate(bombPrefab, new Vector3(rigidBody.transform.position.x, rigidBody.transform.position.y - 0.5f, rigidBody.transform.position.z), Quaternion.identity);
                bombReleased = true;
            }

        }
	}
    private void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.name == "Paratrooper(Clone)")
        {
            Physics2D.IgnoreCollision(collision.gameObject.GetComponent<Collider2D>(), GetComponent<Collider2D>());
        }

        if (collision.gameObject.tag == "anyBullet")
        {
            NewBehaviourScript.finalScore += 10;
            Destroy(collision.gameObject);
            myAnimator.SetBool("gotHit", true);
            if (!killSound)
            {
                sound = GetComponent<AudioSource>();
                sound.Play(0);
                killSound = true;
            }
            StartCoroutine(CollisionFunction());
            //Destroy(gameObject);
        }
    }


    IEnumerator CollisionFunction()
    {
        yield return new WaitForSeconds(0.5f);
        Destroy(gameObject);
    }

    void OnBecameInvisible() {
        Destroy(gameObject);
    }
}