fgm24/Assets/Scripts/Rope/Rope.cs

using System.Collections.Generic;
using UnityEngine;

public class Rope
{
    public List<Point> points {  get ; private set; }
    public List<Stick> sticks {  get; private set; }

    public Rope(List<Point> points, List<Stick> sticks)
    {
        this.points = points;
        this.sticks = sticks;
    }

    public float CalculateLengthOvershoot()
    {
        float sum = 0f;
        foreach (Stick stick in sticks)
        {
            Debug.DrawRay(stick.B.position, (stick.A.position - stick.B.position).normalized * stick.desiredLength);
            float dist = Vector3.Distance(stick.A.position, stick.B.position);
            sum += dist - stick.desiredLength;
        }
        return sum;
    }
}