Making a child object circulate/orbit around another object using mouseposition

Questions & Answers
1

So, what i’m trying to accomplish is my childobject circulating/orbiting my mainobject, but in the direction my mouse cursor points to. The problem here is it has to stay at a certain set radius, much like a planet circulating another planet. But in this case i want to chose the direction with my cursor.

The code i’ve written so far tracks the mouse/cursor position perfectly but only rotates the childobject itself, it’s not making the object rotate around the mainobject

Any help is appreciated

using UnityEngine;
using System.Collections;

public class RotationScript : MonoBehaviour 
{
	
	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void FixedUpdate () 
	{
		float test = angleInDegree (screen (), mouseposition ());
		Debug.Log (test);

		this.transform.eulerAngles = new Vector3 (transform.eulerAngles.x, transform.eulerAngles.y, -test);
	}


	Vector3 mouseposition()
	{
		return Input.mousePosition;
	}

	Vector2 screen ()
	{
		return new Vector2 (Screen.width / 2, Screen.height / 2);
	}


	public float angleInDegree(Vector2 origin, Vector3 target)
	{
		var n = 360 - (Mathf.Atan2 (origin.y - target.y, origin.x - target.x)) * 180 / Mathf.PI + 270;
		return n % 360;
	}

	private float toRadians(float x)
	{
		return (x * Mathf.PI) / 180;
	}
}
2

You solve this in the scene graph.

(1) Add a child empty object to the parent at the same position as the parent (transform of 0,0,0)

(2) Move the orbiting object to be a child of the empty object

(3) Rotate the empty object.