How to detect if Ray is touching object(with or without tag/layer)

Questions & Answers
1

I can’t figure out how to detect if a raycast shooting down is touching object. Physical ground check.

2

There are several ways to code up a Raycast. A simple version is this:

using UnityEngine;

public class Grounded : MonoBehaviour
{
    bool grounded;

    void Update()
    {
        grounded = Physics.Raycast(transform.position, Vector3.down, 0.51f);
        print(grounded);
    }
}

The trick is that a Raycast returns a Boolean so you can test that to see if it’s hit something. Also, make sure your distance is correct. In this example, I assumed a cube of (1, 1, 1) with its centre being at height 0.5f. In that case, I always specify the max distance for the raycast to be slightly more than half the cube height, hence 0.51f.

3

You can use the name of the game object or search a component on the game object.

using UnityEngine;

public class NewBehaviourScript : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    RaycastHit hit;
    void Update()
    {
        if (Physics.Raycast(transform.position,transform.forward,out hit,1000f))
        {
            if (hit.transform.name == "name of yout game object")
            {
                //do something
            }
            if (hit.transform.GetComponent<Rigidbody>() != null)
            {
                //do something else
            }
        }
    }
}

If you hav eany questions please feel free to ask. I will try to reply when I see it.

Hope this helps :slight_smile: