arskrald/AR-1/Assets/AlignmentScript.cs

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

public class AlignmentScript : MonoBehaviour
{
    Transform shuttle;
    Transform landing;
    GameObject quad;
    // Start is called before the first frame update
    void Start() {
        shuttle = GameObject.Find("ShuttleTarget").transform;
        landing = GameObject.Find("LandingTarget").transform;
        quad = GameObject.Find("AlignmentQuad");
    }

    // Update is called once per frame
    void Update() {
        var upDot = Vector3.Dot(shuttle.up, landing.up);
        var forwardDot = Vector3.Dot(shuttle.forward, landing.forward);
        var ratio = (upDot + forwardDot) / 2;
        var color = new Color((1 - ratio)*2, ratio, 0);
        quad.GetComponent<Renderer>().material.color = color;

    }
}