Help with forcing a character to face a certain direction?

[ReturnedTrue (Tr_uth)]

I’ve always used CFrame.fromMatrix to make a part face a specific way and it’s always worked, you mainly give it your RightVector and the UpVector which then it fills in the LookVector.

Here’s an example:

local BodyGyro = Instance.new("BodyGyro")
BodyGyro.D = 0
BodyGyro.MaxTorque = Vector3.new(0, math.huge, 0)

local forwardVector = (Player.Character.HumanoidRootPart.Position - SpellDetails.TargetPos).Unit
local rightVector = forwardVector:Cross(Vector3.new(0,1,0))
 --^Cross it with a temporary UpVector
local upVector = rightVector:Cross(forwardVector)
local cframe = CFrame.fromMatrix(Player.Character.HumanoidRootPart.Position, rightVector, upVector)
--^Going back to emojipasta's reply of using the HRP's position

BodyGyro.CFrame = cframe
BodyGyro.Parent = Player.Character.HumanoidRootPart

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FYI: As I just did in that example, you should Parent the newly created Instance yourself instead of using the second argument as that can have consequences such as delays, inefficiencies etc.
You can read more here:

PSA: Don't use Instance.new() with parent argument

I’ve discovered a pretty bad performance issue in one of top games that has to do with Instance.new and wanted to write about this, since this is not obvious unless you know the system inside out. Tthere are several ways to create a ROBLOX object in Lua: local obj = Instance.new(‘type’); fill obj fields local obj = Instance.new(‘type’, parent); fill obj fields local obj = util.Create(‘type’, { field1 = value1, … }) If you care at all about performance, please only use the first option - I wi…