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

public class ramp : MonoBehaviour
{
    // Start is called before the first frame update
    GameObject Weight;
    GameObject Ramp;
    Vector2 Velocity;
    float m = 20;
    float u = 0.15f;
    public float Fn;
    public float Fu;
    public float Fx;
    public float Fr;

    public float Fg;
    float a;
    float cosa;

    void Start()
    {
        Velocity = new Vector2(0, 0);

        Weight = GameObject.Find("Weight");
        Ramp = GameObject.Find("Ramp");
    }

    // Update is called once per frame
    void Update()
    {
        float angle = 360 - transform.localEulerAngles.z;


        Fg = m * 9.82f;
        cosa = Mathf.Cos(angle*Mathf.Deg2Rad);
        Fn = cosa * Fg;  //Normalkraften  Fn

        //Fu = -(u * Fn);  //Friktionskraften   Fu
        Fu = m * 9.82f * u;

        Fx = Mathf.Sin(angle* Mathf.Deg2Rad) * Fg;  //Kraften som drar den framåt Fx
        //float Fx1 = Mathf.Abs(Fx);

        Fr = Fx - Fu; //Den resulterande kraften


        a = Fr / m; //resulterande accelerationen




        if (Input.GetKeyDown(KeyCode.UpArrow))
        {
            transform.Rotate(0, 0, -2);
        }

        if (Input.GetKeyDown(KeyCode.DownArrow))
        {
            transform.Rotate(0, 0, +2);
        }





        //Accelerationen ska beräknas enligt de krafter som påverkar vikten (tyngdkraft, normalkraft, friktionskraft)
        //O,1 unity enheter per sekund (i kvadrat)
        float ar = 0f;

        if (Fx > Fu || Velocity.x > 0)
        {
            Fr = Fx - Fu;
            ar = Fr / m;
            ar = ar * Time.deltaTime;

        }


        Weight.transform.Translate(Velocity);

        Velocity.x += ar;


    }
}