132 lines
3.0 KiB
Lua
132 lines
3.0 KiB
Lua
--[[Function Module program by Al Sweigart
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Provides useful utility functions.]]
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-- selectItem() selects the inventory
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-- slot with the named item, returns
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-- true if found and false if not
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function select_item(name)
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-- check all inventory slots
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local item
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for slot = 1, 16 do
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item = turtle.getItemDetail(slot)
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if item ~= nil and item['name'] == name then
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turtle.select(slot)
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return true
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end
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end
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return false -- couldn't find item
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end
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-- selectEmptySlot() selects inventory
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-- slot that is empty, returns true if
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-- found, false if no empty spaces
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function select_emptySlot()
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-- loop through all slots
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for slot = 1, 16 do
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if turtle.getItemCount(slot) == 0 then
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turtle.select(slot)
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return true
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end
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end
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return false -- couldn't find empty space
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end
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-- countInventory() returns the total
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-- numer of a given minecraft id item in the inventory
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function count_inventory(minecraft_id)
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local total = 0
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for slot = 1, 16 do
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item = turtle.getItemDetail(slot)
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if item ~= nil and item['name'] == 'minecraft:' .. minecraft_id then
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total = total + turtle.getItem(slot)
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end
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end
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return total
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end
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-- selectAndPlaceDown() selects a slot with given
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-- minecraft id and places a block from it under the turtle
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function select_and_place_down(minecraft_id)
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for slot = 1, 16 do
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if turtle.getItemDetail(slot) == 'minecraft:' .. minecraft_id then
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turtle.select(slot)
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turtle.placeDown()
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return
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end
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end
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end
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-- build_wall() creates a wall stretching
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-- in front of the turtle
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function build_wall(length, height)
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if modules.count_inventory() > length * height then
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return false --not enough block
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end
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turtle.up()
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local movingForward = true
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for currentHeight = 1, height do
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for currentLength = 1, length do
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select_and_place_down() -- Place the block
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if movingForward and currentLength ~= length then
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turtle.forward()
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elseif not movingForward and currentLength ~= length then
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turtle.back()
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end
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end
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if currentHeight ~= height then
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turtle.up()
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end
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movingForward = not movingForward
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end
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-- done building wall; move to end position
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if movingForward then
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-- turtle is near the start position
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for currentLength = 1, length do
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turtle.forward()
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end
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else
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-- turtle is near the end position
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turtle.forward()
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end
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-- move down to the ground
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for currentHeight = 1, height do
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turtle.down()
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end
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return true
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end
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-- build_room() constructs four walls
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-- and a ceiling
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function build_room(length, width, height)
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if modules.count_inventory() < (((length -1) * height * 2) +
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((width -1) * height * 2)) then
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return false -- not enough blocks
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end
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-- build the four walls
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build_wall(length -1, height)
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turtle.turnRight()
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build_wall(width - 1, height)
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turtle.turnRight()
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build_wall(length - 1, height)
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turtle.turnRight()
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build_wall(width - 1, height)
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turtle.turnRight()
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return true
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end
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