Actual Flyer Program

--Modems:
--91 To Server
--92 To Client

sleep(1)

for i=1,16 do
    turtle.select(i)
    turtle.refuel()
end


print("Starting program")
print("Fuel level:",turtle.getFuelLevel())





rotation=0

firstX,firstY,firstZ=gps.locate()

print("Starting coordinates:", firstX, firstY, firstZ)

while turtle.detect() do
    turtle.turnLeft()
end

turtle.forward()
x,y,z=gps.locate()

if x<firstX then
    rotation=2
end
if x>firstX then
    rotation=0
end
if z<firstZ then
    rotation=3
end
if z>firstZ then
    rotation=1
end

print("Current coordinates:", x, y, z, "Rotation:", rotation)

modem=peripheral.find("modem")
modem.open(92)

modem.transmit(91,92,os.getComputerID())

function splitString(str, sep)


    if type(str) ~= "string" then
        return {}
    end

    if sep == nil then
        sep = " "
    end

    local t = {}
    local start = 1

    while true do
        local sepStart, sepEnd = string.find(str, sep, start, true)
        if not sepStart then
            table.insert(t, string.sub(str, start))
            break
        end
        table.insert(t, string.sub(str, start, sepStart - 1))
        start = sepEnd + 1
    end

    return t
end



function turnLeft()
    turtle.turnLeft()
    rotation=rotation-1
    if rotation<0 then
        rotation=3
    end
end

function turnRight()
    turtle.turnRight()
    rotation=rotation+1
    if rotation>3 then
        rotation=0
    end
end

function gotoRotation(rot)
    while rotation~=rot do
        turnRight()
    end
end

function goForward()
    if turtle.forward()==false then
        gotoRotation(math.random(0,3))
        turtle.up()
        turtle.forward()
        turtle.up()
        turtle.forward()
    end
end


function goUp()
    if turtle.up()==false then
        gotoRotation(math.random(0,3))
        goForward()
        goForward()
        turtle.up()
    end
end
function goDown()
    if turtle.down()==false then
        gotoRotation(math.random(0,3))
        turtle.forward()
        turtle.forward()
        turtle.down()
    end
end

function forceForward()
    while turtle.forward()==false do
        sleep(0.01)
    end
end

function forceUp()
    while turtle.up()==false do
        sleep(0.01)
    end
end
function forceDown()
    while turtle.down()==false do
        sleep(0.01)
    end
end

function goToLoc(goX,goY,goZ,goDir,force)
    if force==0 then
    x, y, z = gps.locate()
    while x ~= goX or y ~= goY or z ~= goZ do

        if x < goX then
            gotoRotation(0)
            goForward()
        elseif x > goX then
            gotoRotation(2)
            goForward()
        elseif z < goZ then
            gotoRotation(1)
            goForward()
        elseif z > goZ then
            gotoRotation(3)
            goForward()
        elseif y < goY then
            goUp()
        elseif y > goY then
            goDown()
        end
        x, y, z = gps.locate()
    end
    if goDir then
        gotoRotation(goDir)
    end
end

    if force==1 then
        x, y, z = gps.locate()
        while x ~= goX or y ~= goY or z ~= goZ do
            if x < goX then
                gotoRotation(0)
                forceForward()
            elseif x > goX then
                gotoRotation(2)
                forceForward()
            elseif z < goZ then
                gotoRotation(1)
                forceForward()
            elseif z > goZ then
                gotoRotation(3)
                forceForward()
            elseif y < goY then
                forceUp()
            elseif y > goY then
                forceDown()
            end
            x, y, z = gps.locate()
        end
        if goDir then
            gotoRotation(goDir)
        end
    end

end


while true do
      local event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
    print(("Message received on side %s on channel %d (reply to %d) from %f blocks away with message %s"):format(
        side, channel, replyChannel, distance, tostring(message)
    ))

    if message=="reboot" then
        print("Rebooting...")
        os.reboot()
    end

    splitMessage=splitString(message, " ")
    if splitMessage[1]=="forceGo" then
        newx=tonumber(splitMessage[2])
        newy=tonumber(splitMessage[3])
        newz=tonumber(splitMessage[4])
        id=tonumber(splitMessage[5])
        force=tonumber(splitMessage[6])
        if os.getComputerID()==id then
            print("Forcing go to coordinates:", newx, newy, newz)
            x,y,z=gps.locate()
            yDiff=math.random(5,15)
            --goToLoc(x,y+yDiff,z,0)
            --goToLoc(newx,newy+yDiff,newz,0)
            goToLoc(newx,newy,newz,0,force)
        end

    end
end