using System.Collections;using System.Collections.Generic;using UnityEngine; public class DrawLine2D : MonoBehaviour{ 	[SerializeField]	protected LineRenderer m_LineRenderer;	[SerializeField]	protected bool m_AddCollider = false;	[SerializeField]	protected EdgeCollider2D m_EdgeCollider2D;	[SerializeField]	protected Camera m_Camera;	protected List<Vector2> m_Points; 	public virtual LineRenderer lineRenderer	{		get		{			return m_LineRenderer;		}	} 	public virtual bool addCollider	{		get		{			return m_AddCollider;		}	} 	public virtual EdgeCollider2D edgeCollider2D	{		get		{			return m_EdgeCollider2D;		}	} 	public virtual List<Vector2> points	{		get		{			return m_Points;		}	} 	protected virtual void Awake ()	{		if ( m_LineRenderer == null )		{			Debug.LogWarning ( "DrawLine: Line Renderer not assigned, Adding and Using default Line Renderer." );			CreateDefaultLineRenderer ();		}		if ( m_EdgeCollider2D == null && m_AddCollider )		{			Debug.LogWarning ( "DrawLine: Edge Collider 2D not assigned, Adding and Using default Edge Collider 2D." );			CreateDefaultEdgeCollider2D ();		}		if ( m_Camera == null ) {			m_Camera = Camera.main;		}		m_Points = new List<Vector2> ();	} 	protected virtual void Update ()	{		if ( Input.GetMouseButtonDown ( 0 ) )		{			Reset ();		}		if ( Input.GetMouseButton ( 0 ) )		{			Vector2 mousePosition = m_Camera.ScreenToWorldPoint ( Input.mousePosition );			if ( !m_Points.Contains ( mousePosition ) )			{				m_Points.Add ( mousePosition );				m_LineRenderer.positionCount = m_Points.Count;				m_LineRenderer.SetPosition ( m_LineRenderer.positionCount - 1, mousePosition );				if ( m_EdgeCollider2D != null && m_AddCollider && m_Points.Count > 1 )				{					m_EdgeCollider2D.points = m_Points.ToArray ();				}			}		}	} 	protected virtual void Reset ()	{		if ( m_LineRenderer != null )		{			m_LineRenderer.positionCount = 0;		}		if ( m_Points != null )		{			m_Points.Clear ();		}		if ( m_EdgeCollider2D != null && m_AddCollider )		{			m_EdgeCollider2D.Reset ();		}	} 	protected virtual void CreateDefaultLineRenderer ()	{		m_LineRenderer = gameObject.AddComponent<LineRenderer> ();		m_LineRenderer.positionCount = 0;		m_LineRenderer.material = new Material ( Shader.Find ( "Particles/Additive" ) );		m_LineRenderer.startColor = Color.white;		m_LineRenderer.endColor = Color.white;		m_LineRenderer.startWidth = 0.2f;