Gassy.lua

write("Loading Gassy module... ")

Gassy = {}
Gassy.ender = nil
Gassy.level = 0
Gassy.waypoints = {{0, 0, 0, 0}}
Gassy.dir = 0
Gassy.x = 0
Gassy.y = 0
Gassy.z = 0


function Gassy.dump()
        print("Gassy stats:")
        print("\tFuel: "..turtle.getFuelLevel().." ("..Gassy.level..")")
        print("\tPos: ("..Gassy.x..", "..Gassy.y..", "..Gassy.z..")")
        print("\tDir: "..Gassy.dir)
        print("\tWaypoints:")
        local max = table.getn(Gassy.waypoints)
        for i=1, max do
                local list = Gassy.waypoints[i]
                print("\t\t("..list[1]..", "..list[2]..", "..list[3]..")")
        end
end

function Gassy.init(num)
        Gassy.ender = Enderage.new(Enderage, num, num)
        Gassy.fuel()
end

function Gassy.fuel()
        if turtle.getFuelLevel() <= 5120 then
                Gassy.ender.prepare(Gassy.ender)

                while turtle.getFuelLevel() <= 5120 do
                        sleep(0)
                        Gassy.ender.pull(Gassy.ender)
                        turtle.refuel()
                end
                Gassy.ender.clean(Gassy.ender)
                print("Gassy: refueled to "..turtle.getFuelLevel())
        end
        Gassy.level = turtle.getFuelLevel()
end

function Gassy.turn(s)
        local diff = (Gassy.dir - s) % 4

        if diff == 0 then
                return
        end

        if diff == 1 then
                turtle.turnLeft()

        elseif diff == 2 then
                turtle.turnLeft()
                turtle.turnLeft()

        elseif diff == 3 then
                turtle.turnRight()

        end
        Gassy.dir = s
end

function Gassy.turnRight()
        Gassy.turn((Gassy.dir + 1) % 4)
end

function Gassy.turnLeft()
        Gassy.turn((Gassy.dir - 1) % 4)
end

function Gassy.forward(n)
        if n == nil then
                n = 1
        end

        Gassy.move(turtle.forward, n)

        if Gassy.dir % 2 == 0 then
                if Gassy.dir == 0 then
                        Gassy.y = Gassy.y + n
                else
                        Gassy.y = Gassy.y - n
                end
        else
                if Gassy.dir == 1 then
                        Gassy.x = Gassy.x + n
                else
                        Gassy.x = Gassy.x - n
                end
        end
end

function Gassy.up(n)
        if n == nil then
                n = 1
        end

        Gassy.move(turtle.up, n)
        Gassy.z = Gassy.z + n
end

function Gassy.down(n)
        if n == nil then
                n = 1
        end

        Gassy.move(turtle.down, n)
        Gassy.z = Gassy.z - n
end

function Gassy.move(func, n)
        if Gassy.level <= 5120 then
                Gassy.fuel()
        end

        for i=1, n do
                while not func() do
                        Panic.panic("Path is blocked!")
                end
                Gassy.level = Gassy.level - 1
        end
end

function Gassy.go(x, y, z)

        print("Going to ("..x..", "..y..", "..z..")")

        if Gassy.x - x > 0 then
                Gassy.turn(3)
                Gassy.forward(Gassy.x - x)
        elseif Gassy.x - x < 0 then
                Gassy.turn(1)
                Gassy.forward(x - Gassy.x)
        end

        if Gassy.y - y > 0 then
                Gassy.turn(2)
                Gassy.forward(Gassy.y - y)
        elseif Gassy.y - y < 0 then
                Gassy.turn(0)
                Gassy.forward(y - Gassy.y)
        end

        if Gassy.z - z > 0 then
                Gassy.down(Gassy.z - z)
        elseif Gassy.z - z < 0 then
                Gassy.up(z - Gassy.z)
        end
end

function Gassy.home()
        while Gassy.pop() do
                sleep(0)
        end
        Gassy.go_point()
end

function Gassy.pop()
        local max = table.getn(Gassy.waypoints)

        if max > 1 then
                local list = Gassy.waypoints[max]
                Gassy.x = Gassy.x + list[1]
                Gassy.y = Gassy.y + list[2]
                Gassy.z = Gassy.z + list[3]
                Gassy.dir = (Gassy.dir + list[4]) % 4
                table.remove(Gassy.waypoints)
                return true
        end
        return false
end

function Gassy.push()
        table.insert(Gassy.waypoints, {Gassy.x, Gassy.y, Gassy.z, Gassy.dir})
        Gassy.x = 0
        Gassy.y = 0
        Gassy.z = 0
        Gassy.dir = 0
end

function Gassy.go_point()
        Gassy.go(0, 0, 0)
        Gassy.turn(0)
end

print("Done.")