Raycast object tag check?

Question

I am trying to check if the raycast hits an object with the tag "Dynamic". I cant seem to figure out why the script I wrote doesnt work.

 var hit : RaycastHit;
 
 var Reach : float = 2.0;
 
 var RayHit : boolean;
 
 function Update () {
 
     var fwd = transform.TransformDirection (Vector3.forward);
     Debug.DrawRay(transform.position, fwd * Reach, Color.red);
         
         if (Physics.Raycast (transform.position, fwd, Reach)&&hit.transform.gameObject.tag == "Dynamic") {
             
             RayHit = true;
             
             
         }
     else {
     
     RayHit = false;
     }
     
     
     }

Answer 1

Best Answer

Answer by aldonaletto · Sep 16, 2013 at 01:29 AM

You forgot to pass the hit structure to Raycast (you've got no errors because there exists such overload version of Raycast). Change the Raycast call to this:

   if (Physics.Raycast (transform.position, fwd, hit, Reach) && hit.transform.tag == "Dynamic") {

Notice also that hit.transform already allows direct access to the property tag, thus you can just write hit.transform.tag instead of hit.transform.gameObject.tag.

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Shizuku_Mizuki · Nov 11, 2018 at 09:40 AM 0

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The function is supposed to be

   if (Physics.Raycast (transform.position, fwd, out hit, Reach) && hit.transform.tag == "Dynamic") {

not

    if (Physics.Raycast (transform.position, fwd, hit, Reach) && hit.transform.tag == "Dynamic") {

Answer 2

Answer by Content1of_akind · Apr 21, 2019 at 08:29 PM

If you make a raycast with the name hit, then create an if statement like this to perform when a specific tag collides with the raycast hit. Cheers! If this answer is off topic then I'm sorry for the inconvenience.

                 if(hit.collider.tag == "TagName")
                 {
                     print("You touched the TagName,  nice!");
                 }

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Answer 3

Answer by Kenthria11 · Jun 23, 2017 at 10:42 AM

Including any var such as var RayHit : boolean;

gives error: The contextual keyword `var' may only appear within a local variable declaration

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danbulant · Oct 17, 2019 at 02:37 PM 1

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That's because old unity vas using local variables. Now, you can do <type> <name> = <value>; For example var Reach : float = 2.0; becomes

 float Reach = 2.0f;

Raycast object tag check?

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