initial commit

coord

@@ -0,0 +1,363 @@
+--[[
+Allows a turtle to keep track of it's
+location using a coordinate system.
+
+Use the commands goForward(), goRight(),
+goLeft(), goUp(), and goDown() to
+control the turtle while adding to
+the coordinates.
+
+goHome() will send the turtle back to
+it's origin and will point it north:
+the direction it was originally facing.
+
+A turtle always faces north when it is placed down
+]]--
+
+x = 0
+y = 0
+z = 0
+
+saveX = 0
+saveY = 0
+saveZ = 0
+saveDirection = NORTH
+global map = {}
+
+NORTH = 1
+EAST = 2
+SOUTH = 3
+WEST = 4
+
+UP = 5
+DOWN = 6
+
+RIGHT = 7
+LEFT = 8
+
+direction = NORTH
+
+--[[sends a turtle forward 1 block
+and adds to it's X coordinate]]--
+function goForward()
+  if turtle.forward() then
+    addToCoords(direction)
+    return true
+  else return false
+  end
+end
+
+--[[sends a turtle up 1 block
+and adds to it's Z coordinate]]--
+function goUp()
+  if turtle.up() then
+    addToCoords(UP)
+    return true
+  else return false
+  end
+end
+
+--[[sends a turtle down 1 block
+and subtracts from it's Z coordinate]]--
+function goDown()
+  if turtle.down() then
+    addToCoords(DOWN)
+    return true
+  else return false
+  end
+end
+
+--[[turns a turtle right and changes
+it's direction accordingly]]--
+function goRight()
+  turtle.turnRight()
+  changeDirection(RIGHT)
+end
+
+--[[turns a turtle left and changes
+it's direction accordingly]]--
+function goLeft()
+  turtle.turnLeft()
+  changeDirection(LEFT)
+end
+
+--[[digs the block in front of the turtle and
+sends it forward, keeping track of it's coordinates]]--
+function goDig()
+  turtle.dig()
+  goForward()
+end
+
+--[[digs the block above the turtle and sends it
+up, keeping track of the coordinates]]--
+function goDigUp()
+  turtle.digUp()
+  goUp()
+end
+
+--[[digs the block below the turtle and sends it
+down, keeping track of it's coordinates]]--
+function goDigDown()
+  turtle.digDown()
+  goUp()
+end
+
+--[[sends a turtle home and refuels it from a chest
+below it's origin]]--
+function goRefuel()
+  goHome()
+  turtle.suckDown(64)
+  turtle.select(1)
+  turtle.refuel()
+end
+
+--[[moves a turtle forward a specified number of blocks]]--
+function move(distance)
+  for i=1,distance do
+    goForward()
+  end
+end
+
+--[[moves a turtle up a specified number of blocks]]--
+function moveUp(distance)
+  for i=1,distance do
+    goUp()
+  end
+end
+
+--[[moves a turtle down a specified number of blocks]]--
+function moveDown(distance)
+  for i=1,distance do
+    goDown()
+  end
+end
+
+function autoGoForward()
+  distanceHome = math.abs(x)+math.abs(y)+math.abs(z)
+  if distanceHome < turtle.getFuelLevel()-1 then
+    goForward()
+  else saveAndFuel() end
+end
+
+function autoGoUp()
+  distanceHome = math.abs(x)+math.abs(y)+math.abs(z)
+  if distanceHome < turtle.getFuelLevel()-1 then
+    goUp()
+  else saveAndFuel() end
+end
+
+function autoGoDown()
+  distanceHome = math.abs(x)+math.abs(y)+math.abs(z)
+  if distanceHome < turtle.getFuelLevel()-1 then
+    goDown()
+  else saveAndFuel() end
+end
+
+function autoMove(distance)
+  for i=1,distance do
+    autoGoForward()
+  end
+end
+
+function autoMoveUp(distance)
+  for i=1,distance do
+    autoGoUp()
+  end
+end
+
+function autoMoveDown(distance)
+  for i=1,distance do
+    autoGoDown()
+  end
+end
+
+--[[takes the direction of the turtle and adds 1
+to the appropriate coordinate based on that direction]]--
+function addToCoords(direction)
+  if direction == NORTH then
+    x = x+1
+  elseif direction == EAST then
+    y = y+1
+  elseif direction == SOUTH then
+    x = x-1
+  elseif direction == WEST then
+    y = y-1
+  elseif direction == UP then
+    z = z+1
+  else
+    z = z-1
+  end
+end
+
+--[[takes a direction turned (right or left) and changes the
+direction of the turtle to north, south, east, or west]]--
+function changeDirection(turned)
+  if turned == RIGHT then
+    if direction == NORTH then
+      direction = EAST
+    elseif direction == EAST then
+      direction = SOUTH
+    elseif direction == SOUTH then
+      direction = WEST
+    else
+      direction = NORTH
+    end
+  else
+    if direction == NORTH then
+      direction = WEST
+    elseif direction == WEST then
+      direction = SOUTH
+    elseif direction == SOUTH then
+      direction = EAST
+    else
+      direction = NORTH
+    end
+  end
+end
+
+--[[takes a direction (north, east, south, or west) and turns
+the turtle in that direction]]--
+function setDirection(newDirect)
+  while true do
+    if newDirect == direction then
+      break
+    end
+    goRight()
+  end
+end
+
+--[[based on the current coordinates of a turtle, send the turtle
+back on the x axis, then the y axis, then the z axis]]--
+function goHome()
+  moved = false
+  attempts = 0
+  rightDirection = true
+  leftDirection = false
+  while x~=0 or y~=0 or z~=0 do
+
+    if x > 0 then
+      setDirection(SOUTH)
+    else
+      setDirection(NORTH)
+    end
+    while math.abs(x) > 0 and not turtle.detect() do
+      goForward()
+      moved = true
+    end
+
+    if y > 0 then
+      setDirection(WEST)
+    else
+      setDirection(EAST)
+    end
+    while math.abs(y) > 0 and not turtle.detect() do
+      goForward()
+      moved = true
+    end
+
+    while z > 0 and not turtle.detectDown() do
+      goDown()
+    end
+    while z < 0 and not turtle.detectUp() do
+      goUp()
+      moved = true
+    end
+
+    if moved == false then
+      mazeSolve()
+    end
+
+    moved = false
+  end
+  setDirection(NORTH)
+end
+
+function saveAndFuel()
+  saveCoords()
+  goRefuel()
+  returnToCoords()
+end
+
+function saveCoords()
+  saveX = x
+  saveY = y
+  saveZ = z
+  saveDirection = direction
+end
+
+function returnToCoords()
+  x = -saveX
+  y = -saveY
+  z = -saveZ
+  goHome()
+  setDirection(saveDirection)
+  x = saveX
+  y = saveY
+  z = saveZ
+end
+
+--[[write the main code down here]]--
+
+--[[solves mazes]]--
+function mazeSolve()
+  layer = 1
+  while not returned() do
+    try(map(layer,map))
+    layer = layer + 1
+  end
+end
+
+--[[saves a map of the world around the turtle based on spaces away from the
+turtle. all the empty spaces will be marked as  true and the spaces blocked
+by a block will be marked as false]]--
+function map(layer, map)
+
+  print("made it")
+
+  for i=1,layer do
+
+    print("made it")
+
+    saveCoords()
+    move(layer)
+    map[layer][direction] = turtle.detect()
+    returnToCoords()
+    goRight()
+  end
+
+  for i=1,layer do
+    saveCoords()
+    moveUp(layer)
+    map[layer][UP] = turtle.detectUp()
+    returnToCoords()
+  end
+
+  for i=1,layer do
+    saveCoords()
+    moveDown(layer)
+    map[layer][DOWN] = turtle.detectDown()
+    returnToCoords()
+  end
+  return map
+end
+
+--[[tries a layer to see if a turtle can go home by unsticking itself]]--
+function try(map)
+  for i=1,4 do
+    if map[layer][direction] then
+      move(layer)
+      goHome()
+      if returned() then break end
+    end
+  end
+end
+
+function returned()
+  return x==0 and y==0 and z==0
+end
+
+autoMove(15)
+goRight()
+autoMove(30)
+autoMoveUp(15)
+goHome()