DragDropMatchingItem.cs for stickers 2d (on click stickers) Simplified version

DragDropMatchingItem.cs for stickers 2d

using UnityEngine;
using System.Collections;

public class DragDropMatchingItem : MonoBehaviour
{
	private bool startDraging;//start draging flag
	private bool clickedOnDest;//clicked on a destination flag
		
	private GameObject currentMatchingItemSource;//current matching item
	private GameObject currentMatchingItemDest;//current matching item
	private bool matchDone;//match done flag
	private Vector3 clickPoint;//click point
	private Vector3 offset;//offset vector
	public AudioClip youWin;
	public AudioSource audioSource;//audio source
	public Animator youWinAnimator;//you win animator


	//Three Parameter to handle click on source and destinaiton
	private Vector3 screenPoint;
	public bool IsSourceSelected;
	public bool IsTargetSelected;

	void Start ()
	{
		if (audioSource == null) {
			audioSource = Camera.main.GetComponent<AudioSource> ();//get the audio source
		}
	}






	// Update is called once per frame
	void Update ()
	{
		if (matchDone) {
			return;
		}

		CheckMatchDone ();//check matching

		if (matchDone) {
			audioSource.Stop ();
			//When the entire Match Done
			if (youWinAnimator != null) {
				audioSource.clip = youWin;
				audioSource.Play ();//play win audio clip
				youWinAnimator.SetBool ("isRunning", true);//show you win on the screen
			}
		}

		if (Input.GetMouseButtonDown (0)) { 
			RayCast2D (Input.mousePosition);
		} else if (Input.GetMouseButtonUp (0)) {
			//empty

		}


	
	}

	//2d screen raycast
	private void RayCast2D (Vector3 pos)
	{
		
		pos = Camera.main.ScreenToWorldPoint (pos);//get click position
		
		RaycastHit2D rayCastHit2D = Physics2D.Raycast (pos, Vector2.zero);
		
		if (rayCastHit2D.collider == null) {
			return;
		}
		startDraging = true;//trigger start dragging


		if (currentMatchingItemSource != null) {
			Vector3 curScreenPoint = new Vector3 (Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
			Vector3 curPosition = Camera.main.ScreenToWorldPoint (curScreenPoint) + offset;
			currentMatchingItemSource.transform.position = curPosition;
		}

		if (rayCastHit2D.collider.tag == "MatchingItem") {

		

			//check if source is selected
			if (rayCastHit2D.collider.GetComponent<MatchingItem> ().itemType == MatchingItem.ItemType.SOURCE) {





				Debug.Log (rayCastHit2D.collider.tag);
				Debug.Log (rayCastHit2D.collider.name + "1");
				IsSourceSelected = true;
				IsTargetSelected = false;
				currentMatchingItemSource = (GameObject)rayCastHit2D.transform.gameObject;
				currentMatchingItemSource.GetComponent<Collider2D> ().enabled = true;//enable the collider for the current matching item
				currentMatchingItemSource.GetComponent<FollowTarget> ().isRunning = true;//let the current matching item follows the target
				audioSource.clip = currentMatchingItemSource.GetComponent<MatchingItem> ().dragAudioClip;
				audioSource.Play ();//play drop audio clip


				screenPoint = Camera.main.WorldToScreenPoint(currentMatchingItemSource.transform.position);
				offset = currentMatchingItemSource.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z));


			//check if target is selected and if its matching the source
			} else if (rayCastHit2D.collider.GetComponent<MatchingItem> ().itemType == MatchingItem.ItemType.DESTINATION) {
				IsTargetSelected = true;
				Debug.Log (rayCastHit2D.collider.tag);
				Debug.Log (rayCastHit2D.collider.name + "2");
				currentMatchingItemDest = (GameObject)rayCastHit2D.transform.gameObject;

				if (IsSourceSelected == true && IsTargetSelected == true) {


					if (currentMatchingItemSource.GetComponent<MatchingItem> ().id == rayCastHit2D.collider.GetComponent<MatchingItem> ().id) {
						Debug.Log ("Match");

						//correct match
						clickedOnDest = true;//trigger clickedOnDest
						startDraging = false;//reset startDragging flag
						rayCastHit2D.collider.GetComponent<MatchingItem> ().connected = true;//trigger connected flag for the destination
						currentMatchingItemDest.GetComponent<MatchingItem> ().connected = true;//trigger connected flag for the source

						currentMatchingItemDest.GetComponent<SpriteRenderer> ().sprite = currentMatchingItemSource.GetComponent<SpriteRenderer> ().sprite;

						audioSource.clip = currentMatchingItemSource.GetComponent<MatchingItem> ().dropAudioClip;
						audioSource.Play ();//play drop audio clip
						currentMatchingItemSource.SetActive (false);//hide the source
						IsSourceSelected = false;
						IsTargetSelected = false;

					} else {

						Debug.Log ("No Match");
					}


				}


			} else {
				//Nothing
			}

		

		} 
	}

	//Check if the matching for the entire matching items is done or not.
	private void CheckMatchDone ()
	{
		MatchingItem [] matchingItems = (MatchingItem[])GameObject.FindObjectsOfType (typeof(MatchingItem));
		
		matchDone = true;
		foreach (MatchingItem item in matchingItems) {
			if (!item.connected) {
				matchDone = false;
				return;
			}
		}

	}
}