Update doc/mapformat.txt
This commit is contained in:
Perttu Ahola
parent
c353709f7e
commit
8070f9485b
|
|
@ -1,24 +1,22 @@
|
|||
=========================================
|
||||
Minetest World Format
|
||||
=========================================
|
||||
===============================================
|
||||
Minetest World Format used as of 0.4.dev-120322
|
||||
===============================================
|
||||
|
||||
Format used as of 0.4.dev-120322
|
||||
==================================
|
||||
This applies to a world format carrying the block serialization version 22
|
||||
which is used at least in version 0.4.dev-120322.
|
||||
|
||||
This applies to a world format carrying the serialization version 22 which
|
||||
is used at least in version 0.4.dev-120322.
|
||||
The map data serialization version used is 22. It does not fully specify every
|
||||
aspect of this format; if compliance with this format is to be checked, it
|
||||
needs to be done by detecting if the files and data indeed follows it.
|
||||
|
||||
The serialization version used is 22. It does not fully specify every aspect
|
||||
of this format; if compliance with this format is to be checked, it needs to
|
||||
be done by detecting if the files and data indeed follows it.
|
||||
|
||||
Legacy stuff:
|
||||
-------------
|
||||
Legacy stuff
|
||||
=============
|
||||
Data can, in theory, be contained in the flat file directory structure
|
||||
described below in Version 17, but it is not officially supported.
|
||||
described below in Version 17, but it is not officially supported. Also you
|
||||
may stumble upon all kinds of oddities in not-so-recent formats.
|
||||
|
||||
Files:
|
||||
------
|
||||
Files
|
||||
======
|
||||
Everything is contained in a directory, the name of which is freeform, but
|
||||
often serves as the name of the world.
|
||||
|
||||
|
|
@ -33,36 +31,367 @@ World
|
|||
|-- map.sqlite --- Map data
|
||||
|-- players ------ Player directory
|
||||
| |-- player1 -- Player file
|
||||
| '-- player2 -- Player file
|
||||
| '-- Foo ------ Player file
|
||||
`-- world.mt ----- World metadata
|
||||
|
||||
auth.txt
|
||||
---------
|
||||
Contains authentication data, player per line.
|
||||
<name>:<password hash as <name><password> SHA1 base64>:<privilege1,...>
|
||||
<name>:<password hash>:<privilege1,...>
|
||||
Format of password hash is <name><password> SHA1'd, in the base64 encoding.
|
||||
|
||||
Example lines:
|
||||
Player "celeron55", no password, privileges "interact" and "shout":
|
||||
- Player "celeron55", no password, privileges "interact" and "shout":
|
||||
celeron55::interact,shout
|
||||
Player "Foo", password "bar", privileges "interact" and "shout":
|
||||
foo:iEPX+SQWIR3p67lj/0zigSWTKHg:interact,shout
|
||||
- Player "Foo", password "bar", privilege "shout":
|
||||
foo:iEPX+SQWIR3p67lj/0zigSWTKHg:shout
|
||||
- Player "bar", no password, no privileges:
|
||||
bar::
|
||||
|
||||
env_meta.txt
|
||||
-------------
|
||||
--- Example content ---
|
||||
Simple global environment variables.
|
||||
Example content (added indentation):
|
||||
game_time = 73471
|
||||
time_of_day = 19118
|
||||
EnvArgsEnd
|
||||
-----------------------
|
||||
|
||||
ipban.txt
|
||||
----------
|
||||
Banned IP addresses and usernames.
|
||||
Example content (added indentation):
|
||||
123.456.78.9|foo
|
||||
123.456.78.10|bar
|
||||
|
||||
map_meta.txt
|
||||
-------------
|
||||
Simple global map variables.
|
||||
Example content (added indentation):
|
||||
seed = 7980462765762429666
|
||||
[end_of_params]
|
||||
|
||||
Format used as of 2011-05 or so
|
||||
================================
|
||||
map.sqlite
|
||||
-----------
|
||||
Map data.
|
||||
See Map File Format below.
|
||||
|
||||
player1, Foo
|
||||
-------------
|
||||
Player data.
|
||||
Filename can be anything.
|
||||
See Player File Format below.
|
||||
|
||||
world.mt
|
||||
---------
|
||||
World metadata.
|
||||
Example content (added indentation):
|
||||
gameid = mesetint
|
||||
|
||||
Player File Format
|
||||
===================
|
||||
|
||||
- Should be pretty self-explanatory.
|
||||
- Note: position is in nodes * 10
|
||||
|
||||
Example content (added indentation):
|
||||
hp = 11
|
||||
name = celeron55
|
||||
pitch = 39.77
|
||||
position = (-5231.97,15,1961.41)
|
||||
version = 1
|
||||
yaw = 101.37
|
||||
PlayerArgsEnd
|
||||
List main 32
|
||||
Item default:torch 13
|
||||
Item default:pick_steel 1 50112
|
||||
Item experimental:tnt
|
||||
Item default:cobble 99
|
||||
Item default:pick_stone 1 13104
|
||||
Item default:shovel_steel 1 51838
|
||||
Item default:dirt 61
|
||||
Item default:rail 78
|
||||
Item default:coal_lump 3
|
||||
Item default:cobble 99
|
||||
Item default:leaves 22
|
||||
Item default:gravel 52
|
||||
Item default:axe_steel 1 2045
|
||||
Item default:cobble 98
|
||||
Item default:sand 61
|
||||
Item default:water_source 94
|
||||
Item default:glass 2
|
||||
Item default:mossycobble
|
||||
Item default:pick_steel 1 64428
|
||||
Item animalmaterials:bone
|
||||
Item default:sword_steel
|
||||
Item default:sapling
|
||||
Item default:sword_stone 1 10647
|
||||
Item default:dirt 99
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
EndInventoryList
|
||||
List craft 9
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
EndInventoryList
|
||||
List craftpreview 1
|
||||
Empty
|
||||
EndInventoryList
|
||||
List craftresult 1
|
||||
Empty
|
||||
EndInventoryList
|
||||
EndInventory
|
||||
|
||||
Map File Format
|
||||
================
|
||||
|
||||
Minetest maps consist of MapBlocks, chunks of 16x16x16 nodes.
|
||||
|
||||
In addition to the bulk node data, MapBlocks stored on disk also contain
|
||||
other things.
|
||||
|
||||
History
|
||||
--------
|
||||
We need a bit of history in here. Initially Minetest stored maps in a
|
||||
format called the "sectors" format. It was a directory/file structure like
|
||||
this:
|
||||
sectors2/XXX/ZZZ/YYYY
|
||||
For example, the MapBlock at (0,1,-2) was this file:
|
||||
sectors2/000/ffd/0001
|
||||
|
||||
Eventually Minetest outgrow this directory structure, as filesystems were
|
||||
struggling under the amount of files and directories.
|
||||
|
||||
Large servers seriously needed a new format, and thus the base of the
|
||||
current format was invented, suggested by celeron55 and implemented by
|
||||
JacobF.
|
||||
|
||||
SQLite3 was slammed in, and blocks files were directly inserted as blobs
|
||||
in a single table, indexed by integer primary keys, oddly mangled from
|
||||
coordinates.
|
||||
|
||||
Today we know that SQLite3 allows multiple primary keys (which would allow
|
||||
storing coordinates separately), but the format has been kept unchanged for
|
||||
that part. So, this is where it has come.
|
||||
</history>
|
||||
|
||||
So here goes
|
||||
-------------
|
||||
map.sqlite is an sqlite3 database, containg a single table, called
|
||||
"blocks". It looks like this:
|
||||
|
||||
CREATE TABLE `blocks` (`pos` INT NOT NULL PRIMARY KEY,`data` BLOB);
|
||||
|
||||
The key
|
||||
--------
|
||||
"pos" is created from the three coordinates of a MapBlock using this
|
||||
algorithm, defined here in Python:
|
||||
|
||||
def getBlockAsInteger(p):
|
||||
return int64(p[2]*16777216 + p[1]*4096 + p[0])
|
||||
|
||||
def int64(u):
|
||||
while u >= 2**63:
|
||||
u -= 2**64
|
||||
while u <= -2**63:
|
||||
u += 2**64
|
||||
return u
|
||||
|
||||
It can be converted the other way by using this code:
|
||||
|
||||
def getIntegerAsBlock(i):
|
||||
x = unsignedToSigned(i % 4096, 2048)
|
||||
i = int((i - x) / 4096)
|
||||
y = unsignedToSigned(i % 4096, 2048)
|
||||
i = int((i - y) / 4096)
|
||||
z = unsignedToSigned(i % 4096, 2048)
|
||||
return x,y,z
|
||||
|
||||
def unsignedToSigned(i, max_positive):
|
||||
if i < max_positive:
|
||||
return i
|
||||
else:
|
||||
return i - 2*max_positive
|
||||
|
||||
The blob
|
||||
---------
|
||||
The blob is the data that would have otherwise gone into the file.
|
||||
|
||||
See below for description.
|
||||
|
||||
MapBlock serialization format
|
||||
==============================
|
||||
NOTE: Byte order is MSB first (big-endian).
|
||||
NOTE: Zlib data is in such a format that Python's zlib at least can
|
||||
directly decompress.
|
||||
|
||||
u8 version
|
||||
- map format version number, this one is version 22
|
||||
|
||||
u8 flags
|
||||
- Flag bitmasks:
|
||||
- 0x01: is_underground: Should be set to 0 if there will be no light
|
||||
obstructions above the block. If/when sunlight of a block is updated
|
||||
and there is no block above it, this value is checked for determining
|
||||
whether sunlight comes from the top.
|
||||
- 0x02: day_night_differs: Whether the lighting of the block is different
|
||||
on day and night. Only blocks that have this bit set are updated when
|
||||
day transforms to night.
|
||||
- 0x04: lighting_expired: If true, lighting is invalid and should be
|
||||
updated. If you can't calculate lighting in your generator properly,
|
||||
you could try setting this 1 to everything and setting the uppermost
|
||||
block in every sector as is_underground=0. I am quite sure it doesn't
|
||||
work properly, though.
|
||||
- 0x08: generated: True if the block has been generated. If false, block
|
||||
is mostly filled with CONTENT_IGNORE and is likely to contain eg. parts
|
||||
of trees of neighboring blocks.
|
||||
|
||||
u8 content_width
|
||||
- Number of bytes in the content (param0) fields of nodes
|
||||
- Always 1
|
||||
|
||||
u8 params_width
|
||||
- Number of bytes used for parameters per node
|
||||
- Always 2
|
||||
|
||||
zlib-compressed node data:
|
||||
- content:
|
||||
u8[4096]: param0 fields
|
||||
u8[4096]: param1 fields
|
||||
u8[4096]: param2 fields
|
||||
|
||||
zlib-compressed node metadata list
|
||||
- content:
|
||||
u16 version (=1)
|
||||
u16 count of metadata
|
||||
foreach count:
|
||||
u16 position (p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X)
|
||||
u16 type_id
|
||||
u16 content_size
|
||||
u8[content_size] (content of metadata)
|
||||
|
||||
u16 mapblockobject_count
|
||||
- Always 0
|
||||
- Should be removed in version 23 (TODO)
|
||||
|
||||
u8 static object version:
|
||||
- Always 0
|
||||
|
||||
u16 static_object_count
|
||||
|
||||
foreach static_object_count:
|
||||
u8 type (object type-id)
|
||||
s32 pos_x_nodes * 10000
|
||||
s32 pos_y_nodes * 10000
|
||||
s32 pos_z_nodes * 10000
|
||||
u16 data_size
|
||||
u8[data_size] data
|
||||
|
||||
u32 timestamp
|
||||
- Timestamp when last saved, as seconds from starting the game.
|
||||
- 0xffffffff = invalid/unknown timestamp, nothing should be done with the time
|
||||
difference when loaded
|
||||
|
||||
u8 name-id-mapping version
|
||||
- Always 0
|
||||
|
||||
u16 num_name_id_mappings
|
||||
|
||||
foreach num_name_id_mappings
|
||||
u16 id
|
||||
u16 name_len
|
||||
u8[name_len] name
|
||||
|
||||
EOF.
|
||||
|
||||
Node metadata format
|
||||
---------------------
|
||||
|
||||
1: Generic metadata
|
||||
serialized inventory
|
||||
u32 len
|
||||
u8[len] text
|
||||
u16 len
|
||||
u8[len] owner
|
||||
u16 len
|
||||
u8[len] infotext
|
||||
u16 len
|
||||
u8[len] inventory drawspec
|
||||
u8 allow_text_input (bool)
|
||||
u8 removal_disabled (bool)
|
||||
u8 enforce_owner (bool)
|
||||
u32 num_vars
|
||||
foreach num_vars
|
||||
u16 len
|
||||
u8[len] name
|
||||
u32 len
|
||||
u8[len] value
|
||||
|
||||
14: Sign metadata
|
||||
u16 text_len
|
||||
u8[text_len] text
|
||||
|
||||
15: Chest metadata
|
||||
serialized inventory
|
||||
|
||||
16: Furnace metadata
|
||||
TBD
|
||||
|
||||
17: Locked Chest metadata
|
||||
u16 len
|
||||
u8[len] owner
|
||||
serialized inventory
|
||||
|
||||
Inventory serialization format
|
||||
-------------------------------
|
||||
- The inventory serialization format is line-based
|
||||
- The newline character used is "\n"
|
||||
- The end condition of a serialized inventory is always "EndInventory\n"
|
||||
- All the slots in a list must always be serialized.
|
||||
|
||||
Example (format does not include "---"):
|
||||
---
|
||||
List foo 4
|
||||
Item default:sapling
|
||||
Item default:sword_stone 1 10647
|
||||
Item default:dirt 99
|
||||
Empty
|
||||
EndInventoryList
|
||||
List bar 9
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
Empty
|
||||
EndInventoryList
|
||||
EndInventory
|
||||
---
|
||||
|
||||
==============================================
|
||||
Minetest World Format used as of 2011-05 or so
|
||||
==============================================
|
||||
|
||||
Map data serialization format version 17.
|
||||
|
||||
0.3.1 does not use this format, but a more recent one. This exists here for
|
||||
historical reasons.
|
||||
|
||||
Directory structure:
|
||||
sectors/XXXXZZZZ or sectors2/XXX/ZZZ
|
||||
XXXX, ZZZZ, XXX and ZZZ being the hexadecimal X and Z coordinates.
|
||||
|
|
|
|||
Loading…
Reference in New Issue