LineRendererHooks.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using Janus;
using System.Linq;
using System.Reflection;
using System;

[AddComponentMenu("Liberi/Line Renderer Hooks")]
[RequireComponent(typeof(LineRenderer))]
[ExecuteInEditMode]
[Script(ScriptRole.View)]
public class LineRendererHooks : MonoBehaviour
{
    public Transform EndPoint1;
    public Transform EndPoint2;
    public int VertexCount = 2;
    public bool FixedZ = true;

    LineRenderer _line;

    void Awake ()
    {
        _line = GetComponent<LineRenderer>();

        LateUpdate();
    }   

    void LateUpdate ()
    {
        if (EndPoint1 == null || EndPoint2 == null)
            return;

        _line.SetVertexCount(VertexCount);

        Vector3 delta = EndPoint2.position - EndPoint1.position;
        float length = delta.magnitude;
        Vector3 direction = length == 0 ? Vector3.zero : delta / length;
        float z = transform.position.z;

        for (int i = 0; i < VertexCount; i++)
        {
            float progress = (float)i / (VertexCount - 1);

            Vector3 newVertex = EndPoint1.position + direction * progress * length;

            if (FixedZ)
                newVertex.z = z;

            _line.SetPosition(i, newVertex);
        }
    }
}