--- Move forward in a line for amnt blocks
--- Return false if the turtle gets stuck midway
function lineMotion(amnt)
    for x = 1, amnt do
        local b = turtle.forward()
        if not b then
            return b;
        end
    end
end

--- Performs func and moves one block forward
--- repeats x times
--- Returns true if successfully moves and performs func
--- for the entire length, false otherwise
function lineMotionDoWhile(x, func)
    for xI = 1, x do
        local b = func()
        if not b then
            return b;
        end
        b = turtle.forward()
        if not b then
            return b;
        end
    end
    return true
end --lineMotionDoWhile


--- Moves in a rect shape and performs func
--- Always performs the func first before moving
--- Returns false if movement is blocked, true otherwise
function rectMotionDoWhile(x, y, func)
    local turn = turtle.turnLeft
    for xI = 1, x do
        --- Decide to turn left or right
        if xI % 2 == 0 then
            turn = turtle.turnLeft
        else
            turn = turtle.turnRight
        end

        --- Move in a line
        local b = lineMotionDoWhile(y, func)
        if not b then
            return b
        end

        --- Move to next row
        turn()
        turtle.forward()
        turn()
    end --- for xI = 1, x do
end --- rectMotionDoWhile

function hasEnoughFuel(x, y, z)
    x = math.max(x, 1)
    y = math.max(y, 1)
    z = math.max(z, 1)
    local fuel = turtle.getFuelLevel()
    return fuel >= x * y * z
end --- hasEnoughFuel