turret computer

local monitor = peripheral.find("monitor")
local modem = peripheral.find("modem", rednet.open) -- doing it like this finds all modem peripherals and then opens rednet on them
local tPos
local pos
--- MAIN
monitor.clear()
monitor.setCursorPos(1,1)
monitor.setTextScale(0.5)
monitor.write("Hello, ID: " .. os.computerID()) --the id of the computer

function vec3ToString(vec3)
    local str = ("(x:" .. math.floor(vec3.x+0.5) .. ", y:" .. math.floor(vec3.y+0.5) .. ", z:" .. math.floor(vec3.z+0.5) .. ")")
    return str
end

function receivePosMessage()
    local id, message = rednet.receive(nil,0.5)
    if (message == nil) then return end
    tPos = message

end

function update()
    pos = ship.getWorldspacePosition()
    receivePosMessage()
    if(tPos == nil or pos == nil) then
        return
    end
    monitor.clear()
    monitor.setCursorPos(1,1)
    monitor.write("Message from control: " .. vec3ToString(tPos))
    monitor.setCursorPos(1,2)
    monitor.write("Our position: " .. vec3ToString(pos))

    local deltaPos = vector.new(tPos.x-pos.x,0.0,tPos.z-pos.z)
    local ang = (math.atan2(deltaPos.z,deltaPos.x))
    local yaw = ship.getEulerAnglesXYZ().y
    monitor.setCursorPos(1,3)
    monitor.write("ANG: " .. ang .. ", MY ANG: " .. yaw)
    print("ANG: " .. ang .. ", MY ANG: " .. yaw)
end

while true do
    sleep(0.5)
    update()
end