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Question by MrLolEthan · Nov 01, 2012 at 06:21 PM · raycastonbecameinvisible

Help with making item invisible if not on screen

Ok so you read the title, this is my code so far:

 function OnBecameInvisible() {
     renderer.enabled = false;
 }

So I tried OnBecameVisible but that doesn't work if the object is invisible or renderer is disabled. I thought a Raycast might work but was wondering if there was another better way to do it. Thanks!

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Answer by MrLeap · Nov 01, 2012 at 06:49 PM

Read the section about clip planes. Sounds like you're trying to do something called Frustum culling, which in most cases happens automatically.

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avatar image MrLolEthan · Nov 01, 2012 at 07:40 PM 0
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would it be beneficial then?

avatar image asafsitner · Nov 01, 2012 at 08:06 PM 0
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You can technically calculate the angle between the vector to the object and the camera and if it's greater then the view angle, disable it's renderer.

However, as $$anonymous$$rLeap already said, this is something that Unity does automatically for you. You can test against renderer.isVisible to enable/disable scripts etc. for performance though, which can certainly be useful for optimization purposes.

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