How could a part aim another part?

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#1

Hi :wave:. I’m trying to create a plane crash minigame, and the plane needs to face to the part, because that’s the point where the plane is going to crash, what i mean is a part aiming another part, but my problem is that i don’t know how i could do that. Correct me if i’m wrong, but i think it uses LookVector, i don’t know how to use it, i already searched stuff about this, however, i didn’t find something useful or “understandable”. Thanks for reading. :slight_smile:

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#2

I think this is what you are looking for.

Since CFrame.new() is deprecated, it is replaced by CFrame.fromMatrix(). Of course you can still used the deprecated version, but hey, is that a good practice?

Here’s a sample of that latter constructor:

--target is where to face, and eye is position, sort of like CFrame.new()
function lookAt(target, eye)
    local forwardVector = (eye - target).Unit --lookVector 
    local upVector = Vector3.new(0, 1, 0) --model a vector going straight up
    -- you need to know the right-hand rule, which has something to do with counter-clockwise rotation (search it up for more info)
    local rightVector = forwardVector:Cross(upVector) --cross two vectors in that order to get the right vector
    local upVector2 = rightVector:Cross(forwardVector) --get the REAL up vector perpendicular to the other vectors
 
    return CFrame.fromMatrix(eye, rightVector, upVector2) --return that CFrame
end

Eye and Target need to be Vector3s!

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#3

Have you searched the DevForum if there are already existing articles? I’m pretty sure there are a few articles regarding similar problems.

#4

Just for clarity: CFrame.new itself isn’t deprecated. The overload CFrame.new(Vector3 pos, Vector3 lookAt) is deprecated, and the lookAt() function’s arguments are in reverse: the look goes first, the position goes second.

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#5

When i get the CFrame returned:

How do i apply it to the part’s orientation?

@OptimisticSide - Yeah, i just said it in the post :slight_smile:, sorry if i misunderstood you:

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#6

It’s ok, I also misread your post. For that, I apologize.

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#8

I got an issue:

local OrientationLook = lookAt(e.Position, Char:FindFirstChild("HumanoidRootPart").Position)
e.Orientation = CFrame:ToOrientation(OrientationLook)

ToOrientation is a nil value, should i replace that with FromOrientation?