Calculate lookvector out of camera cframe

Help and Feedback Scripting Support
#1

how do i convert the camera cframe into a lookvector for the characters root part? simple as that. i only want the y axis so they look around but not up/down. im aware there are other posts on this but they arent helpful or descriptive. its almost 3 in the morning here and im literally pulling out hair over this because my character is spazzing when i make a wrong move and i don’t know how to do math in the first place. anything is appreciated.

also, my attempts come from trying to recycle code to make the characters head look with the camera. i didn’t even write the code, i took it from a game i helped a friend clean up, and it works perfectly for its own purpose.

anyways, the code:
local root = chr:WaitForChild(“HumanoidRootPart”)
local hum = chr:WaitForChild(“Humanoid”)
local camDir = root.CFrame:ToObjectSpace(newCF).LookVector
lookDir = CFrame.new(0, 0, 0) * CFrame.Angles(0, -math.atan(camDir.X),
math.asin(camDir.Z)).LookVector
–lookDir eventually becomes the lookvector through proper means (position + lookDir)

and the result:
https://gyazo.com/ce37376a0c3dec7cc41a8940ccb78e76 (head movement is covered elsewhere and doesn’t interfere)

pls i need sleep

#2

From your gyazo link, it seems as though you’re just trying to get the character to rotate based on the camera’s rotation? If so:

local Rot = math.atan2(-Camera.CFrame.lookVector.X, -Camera.CFrame.lookVector.Z)
local newLookFrame = CFrame.new(Character.HumanoidRootPart.Position) * CFrame.Angles(0, Rot, 0)
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#3

i’m still in bed atm, but i’ll try it first thing and mark as solution if it works. thank youu

#4

You can multiply vectors to get the lookvector’s projection onto the XZ plane.

lookDir = (camDir * Vector3.new(1, 0, 1)).Unit
root.CFrame = CFrame.new(root.Position, root.Position + lookDir)
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#5

yeah, you’re a life-saver. ooga booga tired brain cant do math, thanks for having my back lmao

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