Emulating Gravitational Force | but more..

Questions & Answers
1

I have used processing a lot for my college projects and I want to achieve something like this where the objects don’t collide.

http://natureofcode.com/book/chapter-2-forces/#chapter02_example6

So I wrote the exact same code in Unity the force seemed to work but the objects tend to stick to one an other.

This is my code:

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

public class Gravity : MonoBehaviour {

	public static float range = 100;
	public GameObject parent;
	public float maxDistance = 25.0f;
	public float minDistance = 5.0f;
	
	// gravitational constant
	public float G = 0.4f;
	
	void Update()
	{
		Vector3 force = transform.position - parent.transform.position;
		
		float distance = force.magnitude;
		
		// constrain the distance between 
		if(distance < minDistance)
			distance = minDistance;
		else if(distance > maxDistance)
			distance = maxDistance;
		
		// calculate the direction of the force
		force.Normalize();
		
		// calculate the strength of the force
		float strength = (G * rigidbody.mass * parent.rigidbody.mass) / distance * distance;
		
		// multiply the direction of the force with the strength
		force = force * strength * -1;
		
		// adding the force to the rigidbody
		rigidbody.AddForce(force);
		
		Debug.Log("Force: " + force);
	}

Thanks in advance.

2

You are adding the force last. You may need to put your min/max constraint after that, or in LateUpdate()