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Question by isador34 · Aug 11, 2014 at 05:45 PM · gameobjectradius

check gameObject in a circle

Hello all I have a great request:

I have two gameObject: -a cube named spawner -my enemy

I want check the number on my gameObject Enemy are in a defined radius around the cube Spawner.

Thanks

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avatar image JustFun · Aug 11, 2014 at 06:04 PM 0
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http://docs.unity3d.com/ScriptReference/Physics.OverlapSphere.html

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Answer by rutter · Aug 11, 2014 at 06:09 PM

Something is inside a sphere (or circle) if its distance from the center is less than the shape's radius.

 function PointInsideSphere(point : Vector3, center : Vector3, radius : float) {
     return Vector3.Distance(point, center) < radius;
 }

You could use a loop to call something like that repeatedly, using the transform.position of your spawner and each enemy.

That assumes that you have a list of enemies, somewhere. What if you don't? It's possible to build a list of all colliders within a sphere, using Physics.OverlapSphere in 3D or Physics2D.OverlapCircleAll in 2D. Depending on which you're using, you can find examples at those links.

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avatar image isador34 · Aug 11, 2014 at 06:24 PM 0
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I don't unterstand how to use this function

avatar image isador34 · Aug 12, 2014 at 09:50 AM 0
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I just need a condition for get the number of entity in this circle, (I want have a variable radius too)

avatar image isador34 · Aug 12, 2014 at 06:59 PM 0
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so, I tried and my code is: http://pastebin.com/ihquJhh$$anonymous$$

but my spawn créate a lot of game object named EntityTest (no EntityTest(clone) )

and I want instantiate my entity in different position in the range of spawn.

-do you have a idea for my duplication on gameobject ( the gameobject create are empty, in Vector3D.zero, even I desactivate the CanSpawn function, they spawn).

-do you have a idea for instantiate my gameobject in a range?

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