Init

README.md

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+# Minetest mod dumpnodes
+
+This mod writes all nodes with their texture into a nodes.txt file into the world directory.
+
+## Usage:
+
+open the chat and invoke the /dumpnodes command. it requires the server privilege.
+
+You can use the generated nodes.txt file then to generate a colors.txt file for use in minetestmapper.

init.lua

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+--[[
+	Minetest Mod dumpnodes
+
+	This mod adds a ingame chatcommand to write the nodes with theyr texture to a nodes.txt file.
+	This file can be used by MinetestMapperGui to generate a colors.txt file of them.
+]]
+--[[
+	The functions
+	__genOrderedIndex(t)
+	orderedNext(t, state)
+	and orderedPairs(t)
+	where taken from
+	http://lua-users.org/wiki/SortedIteration
+	All rights to the authors.
+]]
+function __genOrderedIndex( t )
+    local orderedIndex = {}
+    for key in pairs(t) do
+        table.insert( orderedIndex, key )
+    end
+    table.sort( orderedIndex )
+    return orderedIndex
+end
+
+function orderedNext(t, state)
+    -- Equivalent of the next function, but returns the keys in the alphabetic
+    -- order. We use a temporary ordered key table that is stored in the
+    -- table being iterated.
+
+    local key = nil
+    --print("orderedNext: state = "..tostring(state) )
+    if state == nil then
+        -- the first time, generate the index
+        t.__orderedIndex = __genOrderedIndex( t )
+        key = t.__orderedIndex[1]
+    else
+        -- fetch the next value
+        for i = 1,table.getn(t.__orderedIndex) do
+            if t.__orderedIndex[i] == state then
+                key = t.__orderedIndex[i+1]
+            end
+        end
+    end
+
+    if key then
+        return key, t[key]
+    end
+
+    -- no more value to return, cleanup
+    t.__orderedIndex = nil
+    return
+end
+
+function orderedPairs(t)
+    -- Equivalent of the pairs() function on tables. Allows to iterate
+    -- in order
+    return orderedNext, t, nil
+end
+
+
+local function getTiles(nd)
+	return nd.tiles or nd.tile_images or nil
+end
+
+local function dumpNodes(playerName, param)
+
+	local file = minetest.get_worldpath()..DIR_DELIM.."nodes.txt"
+	--minetest.get_world_dir()
+	local out, err = io.open(file, 'w')
+	if not out then
+		--minetest.chat_send_player(playerName, 'io.open: ' .. err)
+		return false, "ERROR [dumpnodes]: Could not open file for writing "..err
+	end
+	
+	
+	local currentMod = ""
+	local counter = 0
+	local header = [[
+# This file is generated by dumpnodes.
+# You can use this to generate a colors.txt file that can be used by minetestmapper.
+# To generate a colors.txt you can use the program you find here: 
+# Or you use MinetestMapperGui that have the conversation tool builtin.
+]]
+	out:write(header)
+	for nodeName, def in orderedPairs(minetest.registered_nodes) do
+		local tiles = getTiles(def)
+		if(def.drawtype ~="arilike" and tiles) then
+			local mod, name = nodeName:match('(.*):(.*)')
+			if mod~="" and name~="" then
+
+				local tile = tiles[1]
+				if type(tile) == 'table' then
+					tile = tile.name
+				end
+				tile = (tile .. '^'):match('(.-)^')
+				if(mod ~= currentMod)then
+					out:write('\n# ' .. mod .. '\n')
+					currentMod = mod
+				end
+				out:write(nodeName .. ' ' .. tile .. '\n')
+				print(nodeName.." : " ..tile)
+				counter = counter +1 --lua sucks!
+			end
+		end	
+	end
+	
+	if counter >=1 then
+		return true, "[dumpnodes] ".. counter .." nodes exported to file ".. file
+	else
+		return false, "[dumpnodes] Unknown error. 0 nodes exported to file "..file
+	end
+end	
+
+minetest.register_chatcommand("dumpnodes", {
+	params = "",
+	privs = {server=true},
+	description = "Writes nods and their texture to a nodes.txt file for use in MinetestMapperGui",
+	func = dumpNodes
+	})

mod.conf

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+name=dumpnodes