Get angle between two vectors

[aTryAgainLater (Joaquim_Pimbanelas)]

Hello, could you tell me how I can get an angle between two vectors?
I’m making a rotation system with HingeContraint.TargetAngle. And I wanted to know the angle from the starting position, and the mouse position.

I wanted the HingeConstraint to rotate my part to the mouse direction

I don’t know if this mapping is right, I based it on what I had researching

[KJry_s (MalleoZephyris)]

Read these 2 articles:

Best way to get the angle between two vectors?

For my NPC system, I’m looking to have the NPC rotate their head to look at you (obviously with rotation limits). The desired effect will look something like this: To rotate the head, I use tween service. In the example above, I did: CFrame = head.CFrame * CFrame.fromEulerAnglesXYZ(0,math.rad(45)) My question is, what’s the easiest way to get the angle required for the NPC to look at the player? CFrame = head.CFrame * CFrame.fromEulerAnglesXYZ(0,math.rad(θ)) [image] I could …

Getting the angle between two vectors

[image] I’m trying to find the angle between these two angles. Does anyone have an idea about what to use? I’ve been thinking about using Vector3:Cross() or Vector3:Dot() but I don’t know which one to use I guess. Or maybe CFrame?

fyi |vector| means the distance of the vectors itself.

[nuttela_for1me]

we use dot product

angle = math.acos(v1:Dot(v1) / (v1.Magnitude * v2.Magnitude))

[aTryAgainLater (Joaquim_Pimbanelas)]

I printed this, the printed value is not even more than 1.5

[nuttela_for1me]

@nuttela_for1me

angle = math.acos(v1:Dot(v1) / (v1.Magnitude * v2.Magnitude))

my bad I wrote it incorrectlly dot product of same two vectors isnt logical, it should be:

angle = math.acos(v1:Dot(v2) / (v1.Magnitude * v2.Magnitude))

and also please keep in mind u are getting the angle in radians.