What I’m trying to get is for my first-person gun view models, with ik to make sure the arms are at the right place on the gun.
I’ve tried looking at the forums and there was nothing there. I’m completely dumbfounded.
Thanks in advance, Heres the code:
Gun Module:
local Gun = {}
Gun.__index = Gun
function Gun.new(viewmodel, gun)
local character = viewmodel
local solveModule = script.SolveIK
local self = setmetatable({
_workspace = game:GetService("Workspace");
_runService = game:GetService("RunService");
_gun = gun;
_viewmodel = viewmodel;
_upperTorso = character:WaitForChild("HumanoidRootPart");
_rightShoulder = character:WaitForChild("RightUpperArm"):WaitForChild("RightShoulder");
_rightElbow = character:WaitForChild("RightLowerArm"):WaitForChild("RightElbow");
_rightWrist = character:WaitForChild("RightHand"):WaitForChild("RightWrist");
_leftShoulder = character:WaitForChild("LeftUpperArm"):WaitForChild("LeftShoulder");
_leftElbow = character:WaitForChild("LeftLowerArm"):WaitForChild("LeftElbow");
_leftWrist = character:WaitForChild("LeftHand"):WaitForChild("LeftWrist");
_solveIK = require(solveModule);
----
_RSHOULDER_C0_CACHE = nil;
_RELBOW_C0_CACHE = nil;
_LSHOULDER_C0_CACHE = nil;
_LELBOW_C0_CACHE = nil;
_UPPER_LENGTH = nil;
_LOWER_LENGTH = nil;
----
}, Gun)
self._RSHOULDER_C0_CACHE = self._rightShoulder.C0;
self._RELBOW_C0_CACHE = self._rightElbow.C0;
self._LSHOULDER_C0_CACHE = self._leftShoulder.C0;
self._LELBOW_C0_CACHE = self._leftElbow.C0;
self._UPPER_LENGTH = math.abs(self._rightShoulder.C1.Y) + math.abs(self._rightElbow.C0.Y)
self._LOWER_LENGTH = math.abs(self._rightElbow.C1.Y) + math.abs(self._rightWrist.C0.Y) + math.abs(self._rightWrist.C1.Y)
return self
end
function Gun:Fire()
end
function Gun:Reload()
end
function Gun:AimIn()
end
function Gun:AimOut()
end
function Gun:UpdateViewmodel()
--self._viewmodel:SetPrimaryPartCFrame(workspace.CurrentCamera.CFrame)
self._rightShoulder.Transform = CFrame.new()
self._rightElbow.Transform = CFrame.new()
self._rightWrist.Transform = CFrame.new()
self._leftShoulder.Transform = CFrame.new()
self._leftElbow.Transform = CFrame.new()
self._leftWrist.Transform = CFrame.new()
local shoulderCFrame = self._upperTorso.CFrame * self._RSHOULDER_C0_CACHE
local goalPosition = self._gun.RHand.Position
local planeCF, shoulderAngle, elbowAngle = self._solveIK(shoulderCFrame, goalPosition, self._UPPER_LENGTH, self._LOWER_LENGTH)
self._rightShoulder.C0 = self._upperTorso.CFrame:toObjectSpace(planeCF) * CFrame.Angles(shoulderAngle, 0, 0)
self._rightElbow.C0 = self._RELBOW_C0_CACHE * CFrame.Angles(elbowAngle, 0, 0)
shoulderCFrame = self._upperTorso.CFrame * self._LSHOULDER_C0_CACHE
goalPosition = self._gun.LHand.Position
planeCF, shoulderAngle, elbowAngle = self._solveIK(shoulderCFrame, goalPosition, self._UPPER_LENGTH, self._LOWER_LENGTH)
self._leftShoulder.C0 = self._upperTorso.CFrame:toObjectSpace(planeCF) * CFrame.Angles(shoulderAngle, 0, 0)
self._leftElbow.C0 = self._LELBOW_C0_CACHE * CFrame.Angles(elbowAngle, 0, 0)
end
return Gun
Inverse kinematics module:
local function solveIK(originCF, targetPos, l1, l2)
local localized = originCF:pointToObjectSpace(targetPos)
local localizedUnit = localized.unit
local l3 = localized.magnitude
local axis = Vector3.new(0, 0, -1):Cross(localizedUnit)
local angle = math.acos(-localizedUnit.Z)
local planeCF = originCF * CFrame.fromAxisAngle(axis, angle)
if l3 < math.max(l2, l1) - math.min(l2, l1) then
return planeCF * CFrame.new(0, 0, math.max(l2, l1) - math.min(l2, l1) - l3), -math.pi/2, math.pi
elseif l3 > l1 + l2 then
return planeCF * CFrame.new(0, 0, l1 + l2 - l3), math.pi/2, 0
else
local a1 = -math.acos((-(l2 * l2) + (l1 * l1) + (l3 * l3)) / (2 * l1 * l3))
local a2 = math.acos(((l2 * l2) - (l1 * l1) + (l3 * l3)) / (2 * l2 * l3))
return planeCF, a1 + math.pi/2, a2 - a1
end
end
----
return solveIK
