Turning a vector into a local offset? Math help

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Ok, i have an object, A And i have a point in space, B (its a vector3)

What i want to find, is B's local offset from the location of A, expressed in A's local axes. (A is at a random and arbitrary rotation)

I've gotten as far as B = B - A.transform.position; This gives me an offset in world axes, which is nice but not useful. How do i convert that into A's local coordinate system?

Answer 1

Best Answer

Answer by maccabbe · Jul 11, 2015 at 08:04 PM

http://docs.unity3d.com/ScriptReference/Transform.InverseTransformPoint.html

http://docs.unity3d.com/ScriptReference/Transform.html

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Answer 2

Answer by SteelBlade · Jul 12, 2015 at 09:33 AM

The Transform component provides a lot of great conversion tools, such as:

 transform.InverseTransformDirection(your calculated offset);

It converts world directions to the local directions of the transform it is called on.

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Turning a vector into a local offset? Math help

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