Play ParticleSystem on RayCastHit Object

You don't have to check for a transform. If the LineCast() hits something, then a transform will exist. So now you need to debug.

  Debug.DrawLine(playertarget.transform.position, attackrange.transform.position);
  if(Physics.Linecast(playertarget.transform.position, attackrange.transform.position, out hit)) {
       Debug.Log(hit.collider.name + ", " + hit.collider.tag);
       hit.transform.particleSystem.Play();
  }

 

Thanks, I removed that check. Logging the collider shows I have hit the correct object. But calling hit.transform.particleSystem.Play(); causes a: NullReferenceException: Object reference not set to an instance of an object

I think maybe because the Particle GameObject is a child, so I try to call: GameObject b = hit.transform.Find("Blood"); But then this causes a: error CS0029: Cannot implicitly convert type UnityEngine.Transform' to UnityEngine.GameObject'

Transform inherits 'particleSystem', so you can do (if you are absolutely sure the object hit has a 'Blood' immediate child):

  hit.transform.Find("Blood").particleSystem.Play();

You should probably be checking the tag or name in the hit before executing this code (to avoid a null reference exception).

My guess is that "Blood" is not an immediate child, so you need to specify a path in the Transform.Find(). See the reference. As an alternate, you can try (C#):

   hit.transform.GetComponentInChildren<ParticleSystem>().Play();

...or Javascript:

   hit.transform.GetComponentInChildren(ParticleSystem).Play();

This assumes that there is only one ParticleSystem in the object's children.

Got it working, thanks a ton robertbu! hit.transform.Find("Blood").particleSystem.Play(); works great and I added some error checking as well.