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

Development Programming & Scripting
1

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?

2

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.

Linear algebra for game developers ~ part 1 - Wolfire Games Blog something like this would help understanding math.

3

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.

4

FRotationMatrix::MakeFromX(Angle)

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

5

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