Calculate Polygon Center

PolygonCenter.lua

for _, Polygon: Model in next, game.Selection:Get() do
	if not Polygon:IsA("Model") then continue end
	
	local Center = Vector3.zero
	local Children = Polygon:GetChildren()
	
	for _, Child: BasePart in next, Children do
		if not Child:IsA("BasePart") then continue end
		
		Center += Child.Position
	end
	
	Center /= #Children
	Polygon.WorldPivot = (Polygon.WorldPivot - Polygon.WorldPivot.Position) + Center
end