I’ve been trying to do this for around 30 minutes. This is my code so far, but it’s not working correctly. Sometimes the head points correctly, the other time it points to the opposite side it should be pointing at. Also, it doesn’t point on the Y axis but only on the X axis (basically horizontally only):
local targetHeadCF = lastTarget.Head.CFrame;
local targetHeadLook = targetHeadCF.LookVector;
local ToObjectSpace = CharacterPivot:ToObjectSpace(targetHeadCF).LookVector;
local cfTarget = CFrame.new(0, NeckC0Origin.Y, 0) * CFrame.Angles(0, ToObjectSpace.X, 0) * CFrame.Angles(-ToObjectSpace.Y, 0, 0);
Neck.C0 = Neck.C0:Lerp(cfTarget, 0.1);
Can anyone help me? I’ve been banging my head over this for a while now.
Edit:
Gonna specify:
CharacterPivot = My character’s pivot
targetHeadCF = The CFrame of the head of the other player (the one my head should point to)
I have developed a function to make world space CFrames, like CFrame.lookAt apply when using Motor6D or welds C0 property. This function should work with all rigs as it takes into account of the C1 as explained and derived through here.
I prefer using world space CFrames as it’s easier to visualize rather than thinking in object space relative to the Part0.
local neckJoint = script.Parent
local target = Workspace.Target
local Head = script.Parent.Parent
local upperTorso = neckJoint.Part0
local function worldCFrameToC0ObjectSpace(motor6DJoint,worldCFrame)
local part1CF = motor6DJoint.Part1.CFrame
local c1Store = motor6DJoint.C1
local c0Store = motor6DJoint.C0
local relativeToPart1 =c0Store*c1Store:Inverse()*part1CF:Inverse()*worldCFrame*c1Store
relativeToPart1 -= relativeToPart1.Position
local goalC0CFrame = relativeToPart1+c0Store.Position--New orientation but keep old C0 joint position
return goalC0CFrame
end
while true do
task.wait()
local goalCF = CFrame.lookAt(Head.Position, target.Position, upperTorso.CFrame.UpVector)
neckJoint.C0 = worldCFrameToC0ObjectSpace(neckJoint,goalCF)
end
If you wish to restrict it then that’s another story, but you make the goalCF relative to the torso via ToObjectSpace, Convert to orientation using :ToOrientation, then clamp the angles, then reconstruct using CFrame.fromOrientation. I have done this within my turret module.
Turns out this weird derivation is the same as the one in my article I had to reverse engineer it to figure it out
c0Store * c1Store:Inverse() * part1CF:Inverse()
--Try to derive it from the original weld equation
part1.CFrame * C1 == Part0.CFrame * C0
--Inverse the c1 both sides
part1.CFrame == Part0.CFrame * C0 *C1:Inverse()
--Inverse the part0 both sides
Part0.CFrame:Inverse()*part1.CFrame == C0 *C1:Inverse()
--The formmula I somehow got from this post
local relativeToPart1 = c0Store * c1Store:Inverse() * part1CF:Inverse() * goalWorldCFrame * c1Store
--subsitute the C0 *C1:Inverse()
local relativeToPart1 = Part0.CFrame:Inverse()*part1.CFrame * part1CF:Inverse() * goalWorldCFrame * c1Store
--Resolve
local relativeToPart1 = Part0.CFrame:Inverse()* goalWorldCFrame * c1Store
Somehow it became the same as the one in my article, so the one in my post was the overcomplicated version but its the same thing haha
