com.unity.uiextensions/Examples/UILineRenderer/LineRendererOrbit.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI.Extensions;

[RequireComponent(typeof(UILineRenderer))]
public class LineRendererOrbit : MonoBehaviour {


    UILineRenderer lr;
    Circle circle;
    public GameObject OrbitGO;
    RectTransform orbitGOrt;
    float orbitTime;

    [SerializeField]
    private float _xAxis = 3;

    public float xAxis
    {
        get { return _xAxis; }
        set { _xAxis = value; GenerateOrbit(); }
    }

    [SerializeField]
    private float _yAxis = 3;

    public float yAxis
    {
        get { return _yAxis; }
        set { _yAxis = value; GenerateOrbit(); }
    }

    [SerializeField]
    private int _steps = 10;

    public int Steps
    {
        get { return _steps; }
        set { _steps = value; GenerateOrbit(); }
    }



    // Use this for initialization
    void Awake () {
        lr = GetComponent<UILineRenderer>();
        orbitGOrt = OrbitGO.GetComponent<RectTransform>();
        GenerateOrbit();
    }
	
	// Update is called once per frame
	void Update () {
        orbitTime = orbitTime > _steps ? orbitTime = 0 : orbitTime + Time.deltaTime;
        orbitGOrt.localPosition = circle.Evaluate(orbitTime);
	}

    void GenerateOrbit()
    {
        circle = new Circle(xAxis: _xAxis,yAxis: _yAxis, steps: _steps);
        List<Vector2> Points = new List<Vector2>();
        for (int i = 0; i < _steps; i++)
        {
            Points.Add(circle.Evaluate(i));
        }
        Points.Add(circle.Evaluate(0));
        lr.Points = Points.ToArray();
    }

    private void OnValidate()
    {
        if (lr != null)
        {
            GenerateOrbit();
        }
    }


}