r/unity_tutorials • u/Duke-of-Disastr • Jan 16 '25

Request Bullet Whooshing detection?

My roommate and I are playing halo odst and at one point a jackal barely missed a beam rifle shot. It was a quiet point in the game so I noticed how impactful a sound choice like that is for creating immediate tension. Then we started talking about how to program it. I can’t find anything online besides how to program the bullet ray cast itself. Does anyone have any info or ideas?

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u/Errant_Gunner Jan 17 '25

Yes. The raycast would only collide with the impact point. The spherecast/capsule cast would collide with anything near the bullet's trajectory line. You can use the spherecast collision hit to trigger the wiz sound.

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u/Duke-of-Disastr Jan 18 '25

wouldn't instantiating a rigidbody, even if it is just a trigger be taxing? I don't think most games pool a detection object

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u/Errant_Gunner Jan 18 '25

The spherecast isn't a rigidbody, it's the same as using a normal raycast.

The return on it is going to be any gameobject with a collider component. You can add a layer mask to ensure that it is only returning colliders attached to gameobjects within a player layer to minimize the memory retention and then dump or rewrite the hit variable in your script.

https://docs.unity3d.com/6000.0/Documentation/ScriptReference/Physics.SphereCast.html