how to write a raycast hit script that recognises a specific game object and doesn't use tags-CodePudding

So I'm trying to write a script, it should work in a way that I'm able to put a game object in the inspector, have that object be recognised when looked at with a camera, and when looked, it should also enable an animation and image sprite. I want to use this script without tags as it doesn't single out the specific aniamtion I want played, but it's almost impossible to get it working right and there's almost no tutorials on identifying RayCast.hit with GameObject instead of Tag.

Is there a way to do it, or can this only be accomplished with tags?

using UnityEngine;

public class selectionManager : MonoBehaviour
{
    public Animator outlineAnim;
    public GameObject image;
    public GameObject hitObject;
    public Vector3 collision = Vector3.zero;
    public LayerMask layer;


    private void Update()
    {
        var ray = new Ray(this.transform.position, this.transform.forward);
        RaycastHit hit;
        if (Physics.Raycast(ray, out hit) && hit.collider.gameObject.name(hitObject))
        {
            if (hitObject != null)
            {
                outlineAnim.SetBool("outlineOff", true);
                outlineAnim.SetBool("outlineOn", false);
            }
            outlineAnim.SetBool("outlineOn", true);
            image.SetActive(true);
        }
        else if (hitObject != null)
        {
            outlineAnim.SetBool("outlineOff", true);
            outlineAnim.SetBool("outlineOn", false);
        }
    }

CodePudding user response：

If you can use no more filters (layers, tags) etc but you solely want to rely on the GameObject reference (note that the name is quite unreliable) then I would rather use Physics.RaycastAll and do e.g.

using System.Linq;

public GameObject hitObject;

private void Update()
{
    var ray = new Ray(this.transform.position, this.transform.forward);

    var hits = Physics.RaycastAll(ray);

    var hittingTheHitObject = hits.Any(hit => hit.transform.gameObject == hitObject);

    outlineAnim.SetBool("outlineOff", hittingTheHitObject);
    outlineAnim.SetBool("outlineOn", !hittingTheHitObject);

    image.SetActive(hittingTheHitObject);
}

where hits.Any(hit => hit.transform.gameObject == hitObject) basically equals doing

private bool Any(RaycastHit[] hits)
{
    foreach(var hit in hits)
    {
        if(hit.transform.gameObject == hitObject) return true;
    }

    return false;
}

CodePudding user response：

If you change the if condition, for example, like this

 private void Update()
{
    var ray = new Ray(this.transform.position, this.transform.forward);
    RaycastHit hit;
    if (Physics.Raycast(ray, out hit) && hit.collider.gameObject != null)
    {
        hitObject = hitInfo.collider.gameObject;
        if (hitObject != null)
        {
            outlineAnim.SetBool("outlineOff", true);
            outlineAnim.SetBool("outlineOn", false);
        }
        outlineAnim.SetBool("outlineOn", true);
        image.SetActive(true);
    }
    else if (hitObject != null)
    {
        outlineAnim.SetBool("outlineOff", true);
        outlineAnim.SetBool("outlineOn", false);
    }
}