StructureHandler (Local Script)

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local PlaceStructure = ReplicatedStorage:WaitForChild("PlaceStructure")
local Structures = ReplicatedStorage:WaitForChild("Structures")

local UIS = game:GetService("UserInputService")
local RunService = game:GetService("RunService")

local player = game.Players.LocalPlayer
local StructureFrame = script.Parent.StructureFrame
local Char = player.Character or player.Character:Wait()
local HumanoidRootPart = Char:WaitForChild("HumanoidRootPart")

local mouse = player:GetMouse()

local yBuildingOffset = 5
local maxPlacingDitance = 50
local rKeyIsPressed = false
local placingStructure = false

for _, structureButton in pairs(StructureFrame:GetChildren()) do
    if structureButton:IsA("TextButton") then
        structureButton.MouseButton1Click:Connect(function()

            StructureFrame.Visible = false

            local yOrientation = 0
            local goodToPlace = false
            local placedStructure

            if placingStructure == false then
                placingStructure = true

                local clientStructure = Structures:FindFirstChild(structureButton.Name):Clone()
                clientStructure.BrickColor = BrickColor.new("Forest green")
                clientStructure.Material = "Neon"
                clientStructure.CanCollide = false
                clientStructure.Parent = game.Workspace

                local startingCFrame = CFrame.new(0,-2,-15)
                clientStructure.CFrame = HumanoidRootPart.CFrame:ToWorldSpace(startingCFrame)

                RunService.RenderStepped:Connect(function()
                    local mouseRay = mouse.UnitRay
                    local castRay = Ray.new(mouseRay.Origin,mouseRay.Direction * 1000)
                    local ignoreList = {clientStructure,Char}
                    local hit, position = workspace:FindPartOnRayWithIgnoreList(castRay,ignoreList)

                    if hit and (hit:IsA("Terrain") or hit.Name:lower() == "terrain") and (HumanoidRootPart.Position - clientStructure.Position).Magnitude < maxPlacingDitance then
                        goodToPlace = true
                        clientStructure.BrickColor = BrickColor.new("Forest green")
                    else
                        goodToPlace = false
                        clientStructure.BrickColor = BrickColor.new("Crimson")

                    end

                    local newAnglesCFrame = CFrame.Angles(0,math.rad(yOrientation),0)
                    local newCFrame = CFrame.new(position.X,position.Y + yBuildingOffset,position.Z)
                    clientStructure.CFrame = newCFrame * newAnglesCFrame
                end)

                UIS.InputBegan:Connect(function(input)
                    if input.KeyCode == Enum.KeyCode.R then
                        rKeyIsPressed = true

                        local rotationSpeed = 5
                        while rKeyIsPressed do
                            wait()
                            if placingStructure == true then
                                yOrientation = yOrientation + rotationSpeed
                            end
                        end
                    end
                end)

                UIS.InputEnded:Connect(function(input)
                    if input.KeyCode == Enum.KeyCode.R then
                        rKeyIsPressed = false
                    end
                end)

                UIS.InputBegan:Connect(function(input)
                    if input.UserInputType == Enum.UserInputType.MouseButton1 then
                        if placingStructure == true then
                            if goodToPlace == true then
                                local StructureCFrame = clientStructure.CFrame
                                placedStructure = PlaceStructure:InvokeServer(clientStructure.Name,StructureCFrame)

                                if placedStructure == true then
                                    placingStructure = false
                                    clientStructure:Destroy()
                                    StructureFrame.Visible = true
                                end

                            end
                        end
                    end
                end)
            end

        end)
    end
end