1

So i’ve been trying for a few days to get my code to work by using Physics2D.Raycast to be able to using raycasting for using a touchscreen to activate or touch 2D objects, but with no luck. I was wondering if someone could give me a simple start since I’m still unable to do this without countless errors. Any help is appreciated, Thank you!

This is an example of my code Ive been using so far: `using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;

public class Interactables: MonoBehaviour
{
Ray ray;
RaycastHit hit;

private float distp;
public float maxdist;

private bool ispaused;
bool open = false;

public static String trigname;
public static bool radiohit = false;
private Vector3 v1;

private int hitnum = 0;

// Use this for initialization
void Start()
{
    maxdist = 5f;
}

// Update is called once per frame
void Update()
{
    ray = Camera.main.ScreenPointToRay(Input.mousePosition);
    Clickers();
    ispaused = CharacterSettings.paused;
    if (open == true)
    {
        //close after far away enough
    }
}

private void Clickers()
{
    if (Input.GetMouseButtonDown(0))
    {
        RaycastHit2D hit = Physics2D.Raycast(ray.origin, ray.direction);
        if (hit.collider != null)  //Changed
        {
            //Debug.Log(hit.transform.tag);
            if (ispaused == false)
            {
                distp = Vector3.Distance(transform.position, hit.transform.position);
                //Here goes the selectable items
            }
            if (distp <= maxdist)
            {
                Battery();
            }
        }
    }
}

private void Battery()
{
    if (hit.collider.GetComponent<Collider2D>().tag == "Battery")
    {
        Flashlight.battery++;
        Destroy(hit.transform.gameObject);
    }
}

}
`

2

Here is an example to determine if something can be picked up. You were already on the right track with the raycast. Hope it makes sense.

	public class RayCast : MonoBehaviour
	{
        void Update()
        {
            if (Input.GetMouseButtonDown(0))
            {
                Ray rayLocation = Camera.main.ScreenPointToRay(Input.mousePosition);
                RaycastHit2D hit = Physics2D.Raycast(rayLocation.origin, rayLocation.direction);
                if (hit.collider != null)
                {
                    // We have multiple options to determine - Tags, Layers, Markups (I like markups because they can hold data)

                    // Check if what we hit is a collectible
                    Collectible item = hit.transform.GetComponent<Collectible>();

                    // OR check if they have an interface of collectible  (Do this or above, not both :))
                    ICollectible item2 = hit.transform.GetComponent<ICollectible>();
                }
            }
        }
    }


    // OUR MARKUPS
    public abstract class Collectible : MonoBehaviour
    {
        // Base class from where all our collectibles derive
        // Then we can just see if the collectible script is on it
    }

    public interface ICollectible
    {
        // We can add an interface that is completely empty to our scripts if they can be collected
        // Can be empty, or make a script do something special
    }