How to find part's velocity in one direction

[9100ryan (Equin)]

I have a part and I just need to find the speed it’s moving to the left

I’ve tried AssemblyLinearVelocity, but it gives weird results when the part is moving across both the X and Z axis, and the same issue happens with :VectorToObjectSpace()

Maybe something math related to velocity and lookVector?

[dthecoolest]

Dot product

How to get the velocity of a part. A positive value begin forward the direction

This requires vector math with dot product like @Xx1Luffy1xX said. [image] This will get the speed (number) in the direction of where the character is looking. --put in starter character scripts and walk around --and look at the print local humanoidRootPart = script.Parent:WaitForChild("HumanoidRootPart") while true do wait() local lookVector = humanoidRootPart.CFrame.LookVector local characterVelocity = humanoidRootPart.Velocity local resolvedVector = lookVector:Dot(characterVelocity…

[9100ryan (Equin)]

if uis:IsKeyDown(Enum.KeyCode.A) then
	local NewVelocity
	
	NewVelocity = cam.CFrame.RightVector * -18
	
	HRP.Velocity = NewVelocity
	
	local RightVector = HRP.CFrame.RightVector
	local characterVelocity = HRP.Velocity
	
	local resolvedVector = RightVector:Dot(characterVelocity)/RightVector.Magnitude
	
	print(math.round(resolvedVector))
end

This prints basically the same issue as before, I can send a video if it helps
Does it work with RightVectors? I haven’t used :Dot() before either

[dthecoolest]

Not sure what the exact issue is, otherwise I would suggest the example in the linked post which should be tested.

[9100ryan (Equin)]

@dthecoolest

Walking diagonally will get you 11 because part of the 16 walkspeed is used to go “right” instead of “forward”.

I think it’s this. Walking diagonally changes the speed
I need to know the speed while traveling diagonally. In the example which I quoted, I would need the speed to say 16 even while you’re travelling diagonally