mirror of https://github.com/kepler155c/opus
251 lines
5.7 KiB
Lua
251 lines
5.7 KiB
Lua
_G.requireInjector()
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local Grid = require ("jumper.grid")
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local Pathfinder = require ("jumper.pathfinder")
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local Point = require('point')
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local Util = require('util')
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local turtle = _G.turtle
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local function addBlock(grid, b, dim)
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if Point.inBox(b, dim) then
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local node = grid:getNodeAt(b.x, b.y, b.z)
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if node then
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node.walkable = 1
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end
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end
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end
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-- map shrinks/grows depending upon blocks encountered
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-- the map will encompass any blocks encountered, the turtle position, and the destination
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local function mapDimensions(dest, blocks, boundingBox, dests)
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local sx, sz, sy = turtle.point.x, turtle.point.z, turtle.point.y
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local ex, ez, ey = turtle.point.x, turtle.point.z, turtle.point.y
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local function adjust(pt)
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if pt.x < sx then
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sx = pt.x
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elseif pt.x > ex then
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ex = pt.x
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end
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if pt.y < sy then
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sy = pt.y
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elseif pt.y > ey then
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ey = pt.y
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end
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if pt.z < sz then
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sz = pt.z
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elseif pt.z > ez then
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ez = pt.z
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end
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end
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adjust(dest)
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for _,d in pairs(dests) do
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adjust(d)
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end
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for _,b in pairs(blocks) do
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adjust(b)
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end
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-- expand one block out in all directions
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if boundingBox then
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sx = math.max(sx - 1, boundingBox.x)
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sz = math.max(sz - 1, boundingBox.z)
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sy = math.max(sy - 1, boundingBox.y)
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ex = math.min(ex + 1, boundingBox.ex)
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ez = math.min(ez + 1, boundingBox.ez)
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ey = math.min(ey + 1, boundingBox.ey)
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else
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sx = sx - 1
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sz = sz - 1
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sy = sy - 1
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ex = ex + 1
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ez = ez + 1
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ey = ey + 1
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end
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return {
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ex = ex,
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ez = ez,
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ey = ey,
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x = sx,
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z = sz,
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y = sy
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}
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end
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local function nodeToPoint(node)
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return { x = node:getX(), z = node:getZ(), y = node:getY() }
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end
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local heuristic = function(n, node)
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local m, h = Point.calculateMoves(
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{ x = node._x, y = node._y, z = node._z, heading = node._heading },
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{ x = n._x, y = n._y, z = n._z, heading = n._heading })
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return m, h
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end
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local function dimsAreEqual(d1, d2)
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return d1.ex == d2.ex and
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d1.ey == d2.ey and
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d1.ez == d2.ez and
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d1.x == d2.x and
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d1.y == d2.y and
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d1.z == d2.z
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end
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-- turtle sensor returns blocks in relation to the world - not turtle orientation
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-- so cannot figure out block location unless we know our orientation in the world
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-- really kinda dumb since it returns the coordinates as offsets of our location
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-- instead of true coordinates
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local function addSensorBlocks(blocks, sblocks)
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for _,b in pairs(sblocks) do
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if b.type ~= 'AIR' then
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local pt = { x = turtle.point.x, y = turtle.point.y + b.y, z = turtle.point.z }
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pt.x = pt.x - b.x
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pt.z = pt.z - b.z -- this will only work if we were originally facing west
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local found = false
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for _,ob in pairs(blocks) do
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if pt.x == ob.x and pt.y == ob.y and pt.z == ob.z then
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found = true
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break
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end
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end
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if not found then
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table.insert(blocks, pt)
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end
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end
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end
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end
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local function selectDestination(pts, box, grid)
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if #pts == 1 then
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return pts[1]
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end
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while #pts > 0 do
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local pt = Point.closest(turtle.point, pts)
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if box and not Point.inBox(pt, box) then
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Util.removeByValue(pts, pt)
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else
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if grid:isWalkableAt(pt.x, pt.y, pt.z) then
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return pt
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end
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Util.removeByValue(pts, pt)
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end
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end
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end
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local function pathTo(dest, options)
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local blocks = options.blocks or turtle.getState().blocks or { }
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local dests = options.dest or { dest } -- support alternative destinations
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local box = options.box or turtle.getState().box
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local lastDim = nil
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local grid = nil
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if box then
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box = Point.normalizeBox(box)
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end
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-- Creates a pathfinder object
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local myFinder = Pathfinder(heuristic)
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while turtle.point.x ~= dest.x or turtle.point.z ~= dest.z or turtle.point.y ~= dest.y do
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-- map expands as we encounter obstacles
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local dim = mapDimensions(dest, blocks, box, dests)
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-- reuse map if possible
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if not lastDim or not dimsAreEqual(dim, lastDim) then
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-- Creates a grid object
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grid = Grid(dim)
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myFinder:setGrid(grid)
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lastDim = dim
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end
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for _,b in pairs(blocks) do
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addBlock(grid, b, dim)
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end
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dest = selectDestination(dests, box, grid)
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if not dest then
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-- error('failed to reach destination')
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return false, 'failed to reach destination'
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end
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if turtle.point.x == dest.x and turtle.point.z == dest.z and turtle.point.y == dest.y then
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break
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end
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-- Define start and goal locations coordinates
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local startPt = turtle.point
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local endPt = dest
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-- Calculates the path, and its length
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local path = myFinder:getPath(
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startPt.x, startPt.y, startPt.z, turtle.point.heading,
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endPt.x, endPt.y, endPt.z, dest.heading)
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if not path then
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Util.removeByValue(dests, dest)
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else
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for node in path:nodes() do
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local pt = nodeToPoint(node)
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if turtle.abort then
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return false, 'aborted'
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end
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-- use single turn method so the turtle doesn't turn around
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-- when encountering obstacles -- IS THIS RIGHT ??
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if not turtle.gotoSingleTurn(pt.x, pt.z, pt.y) then
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table.insert(blocks, pt)
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--if device.turtlesensorenvironment then
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-- addSensorBlocks(blocks, device.turtlesensorenvironment.sonicScan())
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--end
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break
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end
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end
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end
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end
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if dest.heading then
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turtle.setHeading(dest.heading)
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end
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return dest
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end
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return {
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pathfind = function(dest, options)
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options = options or { }
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--if not options.blocks and turtle.gotoPoint(dest) then
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-- return dest
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--end
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return pathTo(dest, options)
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end,
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-- set a global bounding box
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-- box can be overridden by passing box in pathfind options
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setBox = function(box)
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turtle.getState().box = box
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end,
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setBlocks = function(blocks)
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turtle.getState().blocks = blocks
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end,
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addBlock = function(block)
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if turtle.getState().blocks then
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table.insert(turtle.getState().blocks, block)
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end
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end,
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reset = function()
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turtle.getState().box = nil
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turtle.getState().blocks = nil
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end,
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}
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