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Question by Harko33 · May 26, 2012 at 09:48 PM · localworldconstantforce

ConstantForce : difference between force and relativeForce

Hi everybody

I'm a new Unity user, and as I read the tutorials, I wonder what's the difference between ConstantForce.force and ConstantForce.relativeForce, and when I have to use one instead of another.

Thank you for your help

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Answer by aldonaletto · May 26, 2012 at 10:12 PM

force uses world coordinates, while relativeForce uses local coordinates. In other words, applying a force Vector3.forward will move the rigidbody in the Z axis direction, while applying the same Vector3.forward as a relativeForce to a rigidbody will move it in its forward direction (local Z axis).

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avatar image Harko33 · May 27, 2012 at 07:46 AM 0
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Hi, and thank you for your answer

Ok. It's beco$$anonymous$$g clear. But if my model in only a single mesh such as a primitive model, there's no difference between local and world coordinates, so force and relativeForce are the same value. Do you confirm that ?

avatar image Bunny83 · May 27, 2012 at 09:28 AM 0
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Only if you don't rotation your object. If an object is in it's initial rotation, it's local axis line up with the global axis.

Try rotating the object, you will see a difference ;)

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