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Question by aNeilator · Aug 04, 2015 at 08:28 PM · physicsrigidbodycolliderrigidbody2d

Ignore sub-colliders for center of mass in Rigidbody2d?

I have a main object with Rigidbody2D with a Collider. I have a child object that also has a 2d collider. Now suppose I want to rotate the whole thing around only the center of mass of parent collider while ignoring the sub collider. Is this possible?

I cannot use transform rotation as it doesn't handle physics collisions etc.

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Answer by zach-r-d · Aug 04, 2015 at 10:31 PM

Try manually setting rigidbody2D.centerOfMass to the center of mass of the parent's collider.

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avatar image aNeilator · Aug 04, 2015 at 10:33 PM 1
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I realised after asking this question. $$anonymous$$y bad.

avatar image zach-r-d · Aug 04, 2015 at 10:55 PM 0
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It's good you asked though, now anyone who googles the question can find the answer! :)

avatar image aNeilator · Aug 04, 2015 at 10:59 PM 0
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:). One thing, I am currently setting the center of mass manually which is kinda dirty. What I am ai$$anonymous$$g to do is to set the center of mass as the center of a CircleCollider2D. I am trying with position/localposition of the collider without any luck. Can this be done?

avatar image zach-r-d · Aug 04, 2015 at 11:04 PM 0
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Sure, set the center of mass to GetComponent<CircleCollider2D>().offset in a script on the parent.

avatar image aNeilator · Aug 04, 2015 at 11:08 PM 1
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ah yes! didn't think it mattered but here it is. Thanks :D

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