Detecting if the object is hit by LineRenderer

Questions & Answers
1

Hi I’m making a 2D reflection game and there is a light renderer that touches my blocks and I want to add the block’s script if it is hit by the line renderer or not but Line Renderer has not collider and I don’t know how to detect line render with other objects. Do you guys have any suggestions?

2

Here’s script that creates the line and adds collider to it

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

public class MyLineDraw : MonoBehaviour
{
   public GameObject linePrefab;
   public GameObject currentLine;
   public LineRenderer lineRenderer;
   public EdgeCollider2D edgeCollider;
   public List<Vector2> fingerPositions;
   private void Update() {
       if(Input.GetMouseButtonDown(0))
       {
           CreateLine();
       }
       if(Input.GetMouseButton(0))
       {
           Vector2 tempFingerpos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
           if(Vector2.Distance(tempFingerpos, fingerPositions[fingerPositions.Count-1])>0)
           {
               UpdateLine(tempFingerpos);
           }
       }
   }
   
   void CreateLine()
   {
       currentLine = Instantiate(linePrefab, Vector3.zero, Quaternion.identity);
       lineRenderer = currentLine.GetComponent<LineRenderer>();
       edgeCollider = currentLine.GetComponent<EdgeCollider2D>();
       fingerPositions.Clear();
       fingerPositions.Add(Camera.main.ScreenToWorldPoint(Input.mousePosition));
       fingerPositions.Add(Camera.main.ScreenToWorldPoint(Input.mousePosition));
       lineRenderer.SetPosition(0, fingerPositions[0]);
       lineRenderer.SetPosition(1, fingerPositions[1]);
       edgeCollider.points = fingerPositions.ToArray();
       

   }

   void UpdateLine(Vector2 newFingerPos)
   {
       fingerPositions.Add(newFingerPos);
       lineRenderer.positionCount++;
       lineRenderer.SetPosition(lineRenderer.positionCount-1, newFingerPos);
       edgeCollider.points = fingerPositions.ToArray();
       
   }

}

For more info check this : Unity Drawing Lines with Mouse Position - Line Renderer and Edge Collider - YouTube
Note: This is to draw line on swiping the screen, modify it as per your requirement