Attatching objects to other objects (when game is running)

Unity Engine
1

Hi people,

I am currently working on a project which requires me to place an object (a peg) at the transform of another (a hole) if they touch. At the moment I am destroying the peg and instantiating a new one where it needs to be (depending on which hole it is touching). This is causing me trouble… I need to be update the transform the peg is trying to access.

I have a square face (like a die) with 9 slots in it. If I enter the peg in to a slot in the top left I need the peg to recognise that slot. To move the peg the mouse button needs to be down and if the mouse button is up, then it shall snap to the holes transform. If I move out of the trigger I need the peg to realise this and see the transform as empty!

Here’s the code I am using at the moment!

using UnityEngine;
using System.Collections;

//[RequireComponent(typeof(BoxCollider))]
[RequireComponent(typeof(Rigidbody))]

public class InstantiateAndDelete : MonoBehaviour {
	
	public GameObject peg;
	
	public bool snapPeg = false;
	public bool isHorizontal = false;
	public bool isVertical = false;
	
	public Transform holeTransform;
	public Transform pegTransform;

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
	
	}
	
	
	void OnTriggerStay(Collider other)
	{
		if(other.name == "VerticalSlot"  snapPeg == false)
		{
			snapPeg = true;
			isVertical = true;
			pegTransform.transform.position = holeTransform.transform.position;
		}
		else if(other.name == "HorizontalSlot"  snapPeg == false)
		{
			snapPeg = true;
			isHorizontal = true;
			pegTransform.transform.position = holeTransform.transform.position;
		}
	}
	
	public void OnMouseUp()
	{
		if(snapPeg == true  isVertical == true)
		{
			Destroy(gameObject);
			Instantiate(peg,holeTransform.position,Quaternion.Euler(0,270,270));
		}
		else if(snapPeg == true  isHorizontal == true)
		{
			//Destroy(gameObject);
			Instantiate(peg,holeTransform.position,Quaternion.Euler(90,0,0));
		}
	}
	
	void OnTriggerExit(Collider other)
	{
		snapPeg = false;
		isHorizontal = false;
		isVertical = false;
	}
}

Thanks,

Cas

2

First, instead of destroying a perfectly good game object, just use it…

change:

Destroy(gameObject);
Instantiate(peg,holeTransform.position,Quaternion.Euler(0,270,270));

To:

transform.position=holeTransform.position;
transform.rotation=holeTransform.rotation;

Next, in order to “parent” one object to another, you use the Transform.parent property.

transform.parent=holeTransform; // since holeTransform is a Transform, this works.
3

Apologies for the late reply and thank you very much for the help! :smile: