how to distinguish which layer has been hit by raycast first?

Question

hey guys, so i've been trying to make a raycast bullet script, which a single ray could hit different game objects in different layers. i have a gun and boxes in my scene one is stone and the other is a wooden one and when i shoot the ray cast bullet passes through all two boxes.sometimes the stone one is in front sometimes the wooden one. how can i tell the script that the first box in the front should be effected and the one in the back should not? i created a small gif file to show my problem: http://s6.uplod.ir/i/00920/6bcpcmir38ad.gif and here is my code:

 Ray rayshow = new Ray (transform.position, transform.forward);
 RaycastHit hitinfo;
 
 
         if (Physics.Raycast (rayshow, out hitinfo, range, stoneLayers)) {
 
             if (hitinfo.collider != null)
             if (hitinfo.collider.gameObject.layer == LayerMask.NameToLayer ("stone")) {
 
 
                 hitstone ();
 
 
             }
 
 
             if (Physics.Raycast (rayshow, out hitinfo, range, woodLayers)) {
                 
 
                 if (hitinfo.collider != null)
                 if (hitinfo.collider.gameObject.layer == LayerMask.NameToLayer ("wood")) {
                     
                     
 
                         
                     hitwoood ();
 
 
             
 
                 }
 
 
             }
 
 
 
 
         }
     }
     public void hitstone ()
     {
 
 
         Ray rayshow = new Ray (transform.position, transform.forward);
 
 
         Debug.DrawLine (rayshow.origin, hitinfo.point, Color.yellow);
 
 
         targetForGun targeti = hitinfo.transform.GetComponent<targetForGun> ();
 
         if (targeti != null) {
 
             targeti.takedamge (damage);
 
         }
         if (hitinfo.rigidbody != null) {
 
             hitinfo.rigidbody.AddForce (-hitinfo.normal * BulletImpactForce);
 
         }
 
 
         GameObject impatbullet = Instantiate (stoneHitImpact, hitinfo.point, Quaternion.LookRotation (hitinfo.normal));
 
         impatbullet.transform.parent = hitinfo.transform;
 
 
         Destroy (impatbullet, 6f);
         GameObject stonesound = Instantiate (stoneHitSound, hitinfo.point, Quaternion.LookRotation (hitinfo.normal));
 
         impatbullet.transform.parent = hitinfo.transform;
 
 
         Destroy (stonesound, 6f);
 
 
 
 
 
 
 
 
 
     }
 
 
     public void hitwoood ()
     {
 
         Ray rayshow = new Ray (transform.position, transform.forward);
         targetForGun targeti = hitinfo.transform.GetComponent<targetForGun> ();
 
         if (targeti != null) {
 
             targeti.takedamge (damage);
 
         }
         if (hitinfo.rigidbody != null) {
 
             hitinfo.rigidbody.AddForce (-hitinfo.normal * BulletImpactForce);
 
         }
         GameObject impatbullet = Instantiate (WoodHitImpact, hitinfo.point, Quaternion.LookRotation (hitinfo.normal));
 
         impatbullet.transform.parent = hitinfo.transform;
 
         Destroy (impatbullet, 6f);
 
 
 
 
 
         GameObject woodsound = Instantiate (WoodHitSound, hitinfo.point, Quaternion.LookRotation (hitinfo.normal));
 
         impatbullet.transform.parent = hitinfo.transform;
 
 
         Destroy (woodsound, 6f);
 
 
 
     }
 }

Answer 1

Best Answer

Answer by Priyanka-Rajwanshi · Apr 27, 2018 at 03:17 PM

@h00man Take a layermask with 2 layers and use only 1 raycast. Thus only the object which is in front would be detected. You can put your checks for layer inside.

You can either make the layermask variable public and set in inspector or see the below link for setting in code. https://answers.unity.com/questions/8715/how-do-i-use-layermasks.html

Add comment · Show 2 · Share

h00man · Apr 27, 2018 at 03:55 PM 0

Share

thanks for responding , i'm sure you have my answer but the link you posted was a little bit confusing for me. my stone layer is on number 8 and the wood on 9 how to you think i should change my scrip

Priyanka-Rajwanshi h00man · Apr 29, 2018 at 06:12 AM 0

Share

Hi, the easier way as to make the requiredLayers$$anonymous$$ask public and assign the required layers in the dropdown menu in inspector. For script see the code below:

 int layermask1 = 1 << 8;
 int layermask2 = 1 << 9;

 Layer$$anonymous$$ask requiredLayers$$anonymous$$ask;
 void Start()
 {
     requiredLayers$$anonymous$$ask = layermask1 | layermask2;
 }

 void Update()
 {
     Ray rayshow = new Ray(transform.position, transform.forward);
     RaycastHit hitinfo;
 
     if (Physics.Raycast(rayshow, out hitinfo, range, requiredLayers$$anonymous$$ask))
     {
         if (hitinfo.collider != null)
         {
             if (hitinfo.collider.gameObject.layer == Layer$$anonymous$$ask.NameToLayer("stone"))
             {
                 hitstone();
 
             }
             else if (hitinfo.collider.gameObject.layer == Layer$$anonymous$$ask.NameToLayer("wood"))
             {
                 hitwoood();
             }
         }
 
     }
 }

how to distinguish which layer has been hit by raycast first?

1 Reply

Welcome to Unity Answers

Follow this Question

Related Questions