commit 6687714b778952e2de9ce8226bba38c6c78010ee
Author: Rokas Puzonas <rokas.puz@gmail.com>
Date:   Thu May 11 21:45:49 2023 +0300

    initial commit

diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+# ComputerCraft utilities
+
+A bunch of non-related scripts which I don't know where to put, but here.
+
+TODO: Maybe `cc-craft` and `cc-qturtle`, should be merged into here?
diff --git a/char-matrix.lua b/char-matrix.lua
new file mode 100644
index 0000000..4fce2dc
--- /dev/null
+++ b/char-matrix.lua
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+-- Print out all available characters in a matrix
+print(" |0123456789abcdef")
+print("-+----------------")
+for i=0, 15 do
+	io.write(("%x|"):format(i))
+	for j=0, 15 do
+		local c = 16*i + j
+
+		-- The character 10 is \n. And it messes up the matrix
+		-- So just write it as a space
+		if c == 10 then
+			io.write(" ")
+		else
+			io.write(("%c"):format(c, c))
+		end
+	end
+	io.write("\n")
+end
+
diff --git a/randbuild.lua b/randbuild.lua
new file mode 100644
index 0000000..ceeeda3
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+++ b/randbuild.lua
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+-- Removes blocks which are not placeable
+local function removeNonBlocks()
+	-- Travel to the ground to test if it can place each item
+	local traveled = 0
+	while not turtle.detectDown() do turtle.down() traveled = traveled + 1 end
+	local blocks = {}
+
+	-- Try placing each item and look at the error message produced
+	-- If the message contains 'item' then it is an item
+	for i=1, 16 do
+		blocks[i] = turtle.getItemDetail(i)
+		if blocks[i] then
+			turtle.select(i)
+			local _, reason = turtle.placeDown()
+			if reason:match("item") then
+				print(("Found non-block in slot '%s'"):format(i))
+				blocks[i] = true
+			end
+		end
+	end
+
+	-- Travel back up to where the turtle started
+	for _=1, traveled do turtle.up() end
+	-- Drop all the items marked as non-blocks
+	for i, details in pairs(blocks) do
+		if type(details) ~= "table" then
+			turtle.select(i)
+			turtle.drop()
+			blocks[i] = nil
+		end
+	end
+	return blocks
+end
+
+local function followPath(walk_path)
+	local command_lookup = {
+		U = turtle.up, D = turtle.down,
+		F = turtle.forward, B = turtle.back,
+		L = turtle.turnLeft, R = turtle.turnRight
+	}
+	local count, op = 0, ""
+	local pattern_iterator = walk_path:gmatch("(%d+)([UDFBLR])")
+	return function()
+		while true do
+			if count == 0 then
+				count, op = pattern_iterator()
+				if not (count and op) then return end
+			end
+
+			command_lookup[op]()
+			count = count - 1
+			if op ~= "L" and op ~= "R" then
+				return count, op
+			end
+		end
+	end
+end
+
+local function getTravelCost(walk_path)
+	local distance = 0
+	for count, op in walk_path:gmatch("(%d+)([UDFBLR])") do
+		if op ~= "L" and op ~= "R" then
+			distance = distance + count
+		end
+	end
+	return distance
+end
+
+-- Main
+math.randomseed(os.epoch())
+local build_path = "6F 1R 20F 1R 14F 1R 20F 1R 5F"
+
+local travel_cost = getTravelCost(build_path)
+if travel_cost > turtle.getFuelLevel() then
+	print(("- Insufficient fuel level %s, needed %s"):format(turtle.getFuelLevel(), travel_cost))
+	return
+end
+print(("- Sufficient fuel level %s, needed %s"):format(turtle.getFuelLevel(), travel_cost))
+
+print("- Removing items which are not blocks")
+local blocks_lookup = {}
+local total_blocks = 0
+for i, details in pairs(removeNonBlocks()) do
+	local name = ("%s/%s"):format(details.name, details.damage or 0)
+	blocks_lookup[name] = blocks_lookup[name] or {}
+	blocks_lookup[name][i] = details.count
+	blocks_lookup[name].total = (blocks_lookup[name].total or 0) + details.count
+	total_blocks = total_blocks + details.count
+end
+turtle.up()
+
+if travel_cost > total_blocks then
+	print(("- Insufficient block count %s, needed %s"):format(total_blocks, travel_cost))
+	return
+end
+print(("- Sufficient block count %s, needed %s"):format(total_blocks, travel_cost))
+
+print(("- Following path and building: '%s'"):format(build_path))
+for _ in followPath(build_path) do
+	local target_name, target_score
+
+	for name, details in pairs(blocks_lookup) do
+		local score = details.total * math.random()
+		if not target_score or score > target_score then
+			target_score = score
+			target_name = name
+		end
+	end
+
+	local target_block = blocks_lookup[target_name]
+	for i=1, 16 do
+		if target_block[i] and target_block[i] > 0 then
+			turtle.select(i)
+			target_block[i] = target_block[i] - 1
+			target_block.total = target_block.total - 1
+			break
+		end
+	end
+	turtle.placeDown()
+end
+
+print("- Finished")