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How can I find angle between 2 vectors (Points in world coordinate)?

Hi..

Is there any build in function that can allow me to find the Rotator between 2 points(vectors) in the world coordinate?

I tried searching a few maths libraries but couldn't find any. So is there a function that can do what I want or I need to manually write the function?

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asked May 09 '14 at 05:33 AM in C++ Programming

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envenger
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1 answer: sort voted first
 FVector Angle = (TargetPosition - MyPosition);
 FRotator Rotation = FRotationMatrix::MakeFromX(Angle).Rotator();

Basically, to find vector between two other vectors you have to subtract one from another.

http://blog.wolfire.com/2009/07/linear-algebra-for-game-developers-part-1/ something like this would help understanding math.

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answered May 09 '14 at 07:17 AM

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BiggestSmile
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avatar image envenger May 09 '14 at 07:29 AM

Ok thanks.. I don't have much idea about RotationMatrix. Will check it surely.

I was going to use something similar to this http://wiki.beyondunreal.com/Legacy:Useful_Maths_Functions#Rotations_between_two_Vectors

I guess both of them similar results.

avatar image BiggestSmile May 09 '14 at 03:08 PM

FRotationMatrix::MakeFromX(Angle)

"Creates" matrix using X value of given vector, Rotator() returns resulting FRotator.

avatar image imskull Jun 03 '16 at 08:07 AM

No, it uses the given vector AS x-axis, it doesn't mean to use only x value of given vector.

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