Help with grabbing object code

Questions & Answers
1

Hey there! I am working on grabbing some objects. I am using this script and my problem is that when i grab something it can go through walls floor etc, as it doesn’t have box collider. Any solution to that?

using UnityEngine;
using System.Collections;

public class Grab : MonoBehaviour {
	
	GameObject grabbedObject;
	float grabbedObjectSize;
	GameObject GetMouseHoverObject(float range)
	{
		Vector3 position = gameObject.transform.position;
		RaycastHit raycastHit;
		Vector3 target = position + Camera.main.transform.forward * range;
		
		if (Physics.Linecast(position, target, out raycastHit))
			return raycastHit.collider.gameObject;
		return null;
		
	}
	
	void TryGrabObject(GameObject grabObject)
	{
		if (grabObject == null || !CanGrab(grabObject))
			return;
		grabbedObject = grabObject;
		grabbedObjectSize = grabObject.GetComponent<Renderer>().bounds.size.magnitude;
	}
	bool CanGrab(GameObject canidate)
	{
		return canidate.GetComponent<Rigidbody> () != null;
	}
	void DropObject()
	{
		if (grabbedObject == null)
			return;
		
		
		if (grabbedObject.GetComponent<Rigidbody> () != null)
			grabbedObject.GetComponent<Rigidbody> ().velocity = Vector3.zero;
		grabbedObject = null;
	}
	
	void Update () {
		if (Input.GetMouseButtonDown(1)) 
		{
			if (grabbedObject == null)
				TryGrabObject(GetMouseHoverObject(5));
			else
				DropObject();
		}
		
		if (grabbedObject != null) 
		{
			Vector3 newPosition = gameObject.transform.position+Camera.main.transform.forward*grabbedObjectSize;
			grabbedObject.transform.position = newPosition;
		}
		
	}
}
2

Add a box collider? No seriously, if you don’t want it to collide with anything else you can set up collision layers. Unity - Manual: Layer-based collision detection

Other than that you can set the grabbing object as parent of the grabbedObject.