local default_output_file = nil
function LuaExportStart()
 local myFileName="Flight-"..os.date("%Y%m%d-%H%M%S")..".txt";   
  --default_output_file = io.open("./Temp/Flight_data/"..myFileName, "w")
 default_output_file = io.open("c:/dcsw_flight_data/"..myFileName, "w")
 default_output_file:write(string.format("Model time,sec; LeftEngineFAN,x10; Altitude Bar,x10m; Ind.AirSpeed,x100 km/h; AoA; Vertical Velocity, m/s; Bank; Pitch; Altitude Rad,x10m; AccelerationY\n"))
end

function LuaExportBeforeNextFrame()
end

function LuaExportAfterNextFrame()
end

function LuaExportStop()
	io.close()
end

function LuaExportActivityNextEvent(t)
	local tNext = t

-- Put your event code here and increase tNext for the next event
-- so this function will be called automatically at your custom
-- model times.
-- If tNext == t then the activity will be terminated.

	local t = LoGetModelTime()
	local engine = LoGetEngineInfo()
	local navmode = LoGetNavigationInfo()
	local altBar = LoGetAltitudeAboveSeaLevel()
	local altRad = LoGetAltitudeAboveGroundLevel()
	local pitch, bank, yaw = LoGetADIPitchBankYaw()
	local indAirSpd = LoGetIndicatedAirSpeed()
	local aoa = LoGetAngleOfAttack()
	local vrtVel = LoGetVerticalVelocity()
	local acceleration = LoGetAccelerationUnits()
-- Then send data to your file or to your receiving program:
-- 1) File
	if navmode.SystemMode.submode=="LANDING" and altBar < 100
	then
        --default_output_file:write(string.format("%.2f; %.2f; %.2f; %.2f; %.2f; %.2f; %.2f; %.2f; %.2f\n", t, 0.1*engine.RPM.left, 0.1*altBar, 0.036*indAirSpd, 57.3*aoa, vrtVel, 57.3*bank, 57.3*pitch, 0.1*altRad))	
        default_output_file:write(string.format("%.2f; %.2f; %.2f; %.2f; %.2f; %.2f; %.2f; %.2f; %.2f; %.2f\n", t, 0.1*engine.RPM.left, 0.1*altBar, 0.036*indAirSpd, 57.3*aoa, vrtVel, 57.3*bank, 57.3*pitch, 0.1*altRad, acceleration.y))	
	end

	tNext = tNext + 0.5

	return tNext
end