Spawning an object attached to one object, drawn to another.

I have a game where the player score while getting next to an object. I want to create a line that shoots from the player to the enemy as the player has entered that range.

It seems like Distance Joint 2D does something SIMILAR to what I want, but not quite.

I don’t see a clear way to do it, but I’ll certainly hack at more of it tonight.

I made a beautiful picture to further explain what I’m asking, 'cause I feel like I did a poor job. I want to use this as feedback to let the player know they’ve scored.

Here is a bit of example code. To test it

  • Start a new scene
  • Create a Quad and set the x scale to the width of the line you want.
  • Attach the script below to the Quad
  • Crate two game object that are no more that ‘breakDistance’ apart (default 5 units).
  • Drag and drop the two game objects onto the ‘start’ and ‘end’ variables.
  • Run the app and hit the space bar to connect the line.
  • Move one of the game objects so they are more than ‘breakDistance’ apart to break the line.

using UnityEngine;
using System.Collections;

public class LinePulse : MonoBehaviour {
	public float pulseTime = 1.0f;
	public float breakDistance = 5.0f;
	public Transform start;
	public Transform end;

	private bool pulsing = false;;

	void Start() {
		renderer.enabled = false;

	void Update () {
		if (Input.GetKeyDown(KeyCode.Space)) {

	IEnumerator Pulse(float time) {
		if (pulsing) yield break;
		pulsing = true;
		renderer.enabled = true;
		Vector3 scale = transform.localScale;
		bool broken = false;

		float timer = 0.0f;
		while (timer <= 1.0f) {
			Vector3 dir = end.position - start.position;
			float dist = dir.magnitude;
			transform.rotation = Quaternion.FromToRotation (Vector3.up, dir);
			float yScale = Mathf.PingPong(timer * 2.0f, 1.0f);
			scale.y = yScale * dist;
			transform.localScale = scale;
			transform.position = Vector3.Lerp (start.position, end.position, timer);

			if (!broken && timer > 0.5f && dist > breakDistance)
				broken = true;

			if (timer < 0.5 || broken)
				timer += Time.deltaTime / time;
			yield return null;
		pulsing = false;
		renderer.enabled = false;

For your app, you’ll likely have to set things up a bit differently, but this gives you some sample code that solves the line connecting and breaking.