Roblox spinning a part with CFrames

Help and Feedback Scripting Support
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#1

Hello,

I’ve been having some issues with continuously spinning a part via CFrames (I need to do it with CFrames to update the welds I have attached).
I have the following code:

local function SpinPart(part)
    local TempTweenInfo = TweenInfo.new(
        part:WaitForChild("RotationSpeed").Value,
        Enum.EasingStyle.Linear,
        Enum.EasingDirection.Out,
        -1
    )
    local RotationVector = part:WaitForChild("RotationVector").Value
    local TempTween = TweenService:Create(part, TempTweenInfo, {CFrame = part.CFrame * CFrame.Angles(RotationVector.X, RotationVector.Y, RotationVector.Z)})
    TempTween:Play()
end

RotationVector is a Vector3Value in the part which shows its intended orientation destination
RotationSpeed is a IntValue in the part which shows the tween duration

But it makes the spin bricks do some interesting spinning:

Here is an example of what’s going on so you can easily replicate my issue:
https://www.roblox.com/library/6714836489

Any ideas you could give would be great,
Tweakified

#2

What is your vectorvalue? It might be too high.

#3

The RotationVector used in the video was 0, 0, 360
However the one I used in the file I sent was 0, 360, 0

#4

Rotation is measured in radians in CFrame. Did you convert?

2 Likes
#5

You can convert degrees to radians with math.rad().

#6

No, but as part of my debug process I changed it to:
CFrame.Angles(math.rad(RotationVector.X), math.rad(RotationVector.Y), math.rad(RotationVector.Z))})
And the part didn’t rotate at all.

#7

Yeah because 360 degrees is basically the starting orientation of the part so it takes the shortest route which is basically doing nothing?

#8

You might want to increase the rotation by 90 each time.

1 Like
#9

Just tried this:

local function SpinPart(part)
	local TempTweenInfo = TweenInfo.new(
		part:WaitForChild("RotationSpeed").Value / 3,
		Enum.EasingStyle.Linear
	)
	local RotationVector = part:WaitForChild("RotationVector").Value
	local TempTween1 = TweenService:Create(part, TempTweenInfo, {CFrame = part.CFrame * CFrame.Angles(math.rad(RotationVector.X) / 3, math.rad(RotationVector.Y) / 3, math.rad(RotationVector.Z) / 3)})
	local TempTween2 = TweenService:Create(part, TempTweenInfo, {CFrame = part.CFrame * CFrame.Angles(math.rad((RotationVector.X) / 3) * 2, math.rad((RotationVector.Y) / 3) * 2, math.rad((RotationVector.Z) / 3) * 2)})
	local TempTween3 = TweenService:Create(part, TempTweenInfo, {CFrame = part.CFrame * CFrame.Angles(math.rad(RotationVector.X), math.rad(RotationVector.Y), math.rad(RotationVector.Z))})
	while true do
		TempTween1:Play()
		TempTween1.Completed:Wait()
		TempTween2:Play()
		TempTween2.Completed:Wait()
		TempTween3:Play()
		TempTween3.Completed:Wait()
	end
end

And it works!
Thanks

#10

Yay! Glad i could help you. :smiley: