Positioning script doesn't work

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1

I was trying to make it so, the parent of this script always stands 2.5 studs above the floor part. After coding the script, i saw that it didn’t work. I couldn’t find why, too.

--Services
local RunService = game:GetService("RunService")
--Objects
local Part = script.Parent
local Character = Part.Parent.Parent
--Values
local Threshold = 2048

if Character:IsA("Model") and Character:FindFirstChildOfClass("Humanoid") then
	local function IsPartInDirection()
		local Return = false
		local FoundPart = nil
		pcall(function()
			local raycastParams = RaycastParams.new()
			raycastParams.FilterDescendantsInstances = {Part, Character}
			raycastParams.IgnoreWater = true 
			raycastParams.RespectCanCollide = true
			raycastParams.FilterType = Enum.RaycastFilterType.Exclude

			local direction = Vector3.new(0, -1, 0)
			local origin = Part.Position  -- Corrected origin calculation
			local raycastResult = workspace:Raycast(origin, direction * Threshold, raycastParams)

			if raycastResult then
				Return = true
				FoundPart = raycastResult.Instance
			end
		end)
		return Return, FoundPart
	end

	RunService.Heartbeat:Connect(function()
		local Check, FoundPart = IsPartInDirection()

		if Check then
			print(FoundPart)
			local PartDistance = FoundPart.Position.Y + FoundPart.Size.Y/2  -- Corrected calculation
			local Distance = PartDistance + 3  -- Adjusted calculation

			Part.Position = Vector3.new(Part.Position.X, Distance, Part.Position.Z)  -- Apply corrected position
		end
	end)
end
2

Can you elaborate on this? What specifically happened and can you possibly show a video?

3

The issue was that the part wasnt setting the position correctly even though the position it calculated was right. I found the issue, and it was caused because im welding the part with a motor6d, but it seems to still be broken. Here is the updated code:

--Services
local RunService = game:GetService("RunService")
--Objects
local Part = script.Parent
local Character = Part.Parent.Parent
local PartMotor = script.Parent
--Values
local Threshold = 2048

if Character:IsA("Model") and Character:FindFirstChildOfClass("Humanoid") and script.Parent:FindFirstChild("HumanoidRootPartMotor") then
	local PartMotor: Motor6D = script.Parent:FindFirstChild("HumanoidRootPartMotor")
	
	local function IsPartInDirection()
		local Return = false
		local FoundPart = nil
		pcall(function()
			local raycastParams = RaycastParams.new()
			raycastParams.FilterDescendantsInstances = {Part, Character}
			raycastParams.IgnoreWater = true 
			raycastParams.RespectCanCollide = true
			raycastParams.FilterType = Enum.RaycastFilterType.Exclude

			local direction = Vector3.new(0, -1, 0)
			local origin = Part.Position  -- Corrected origin calculation
			local raycastResult = workspace:Raycast(origin, direction * Threshold, raycastParams)

			if raycastResult then
				Return = true
				FoundPart = raycastResult.Instance
			end
		end)
		return Return, FoundPart
	end

	RunService.Heartbeat:Connect(function()
		local Check, FoundPart = IsPartInDirection()

		if Check then
			local FoundPartTopPos = FoundPart.Position.Y + FoundPart.Size.Y/2  -- Corrected calculation
			local PartBottomPos = Part.Position.Y - Part.Size.Y/2

			PartMotor.C0.Position = Vector3.new(0, PartBottomPos - FoundPartTopPos, 0)
		end
	end)
end