tgps

function getturtlepos()
local ch -- sets a var for the direction the turtle is facing
rednet.open("right") -- opens the modem
local cx,cy,cz = gps.locate(10) -- gets the turtles position
turtle.forward() -- moves the turtle forward 1 space
local fx,fy,fz = gps.locate(10) -- gets the turtles position
turtle.back() -- moves the turtle back to its original position
rednet.close("right") -- closes the modem
if fx > cx then --if final X is Greater than original X  turtle is facing East
ch = 3 --East
elseif fx < cx then --if final X is Less than original X  turtle is facing West
ch = 1 --West
elseif fz > cz then --if final Z is Greater than original Z  turtle is facing South
ch = 4 --South
elseif fz < cz then --if final Z is Less than original Z  turtle is facing North
ch = 2 --North
end
return cx , cy , cz , ch -- returns position and heading info
end