diff options
Diffstat (limited to 'doc/world_format.txt')
| -rw-r--r-- | doc/world_format.txt | 91 |
1 files changed, 53 insertions, 38 deletions
diff --git a/doc/world_format.txt b/doc/world_format.txt index a8a9e463e..eb1d7f728 100644 --- a/doc/world_format.txt +++ b/doc/world_format.txt @@ -1,5 +1,5 @@ ============================= -Minetest World Format 22...27 +Minetest World Format 22...29 ============================= This applies to a world format carrying the block serialization version @@ -8,6 +8,7 @@ This applies to a world format carrying the block serialization version - 0.4.0 (23) - 24 was never released as stable and existed for ~2 days - 27 was added in 0.4.15-dev +- 29 was added in 5.5.0-dev The block serialization version does not fully specify every aspect of this format; if compliance with this format is to be checked, it needs to be @@ -281,6 +282,8 @@ 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. +NOTE: Since version 29 zstd is used instead of zlib. In addition the entire + block is first serialized and then compressed (except the version byte). u8 version - map format version number, see serialisation.h for the latest number @@ -324,6 +327,20 @@ u16 lighting_complete then Minetest will correct lighting in the day light bank when the block at (1, 0, 0) is also loaded. +if map format version >= 29: + 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 + + u16 num_name_id_mappings + foreach num_name_id_mappings + u16 id + u16 name_len + u8[name_len] name +if map format version < 29: + -- Nothing right here, timpstamp and node id mappings are serialized later + u8 content_width - Number of bytes in the content (param0) fields of nodes if map format version <= 23: @@ -335,7 +352,7 @@ u8 params_width - Number of bytes used for parameters per node - Always 2 -zlib-compressed node data: +node data (zlib-compressed if version < 29): if content_width == 1: - content: u8[4096]: param0 fields @@ -348,31 +365,31 @@ if content_width == 2: u8[4096]: param2 fields - The location of a node in each of those arrays is (z*16*16 + y*16 + x). -zlib-compressed node metadata list +node metadata list (zlib-compressed if version < 29): - content: -if map format version <= 22: - 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. Format depends on type_id, see below. -if map format version >= 23: - u8 version -- Note: type was u16 for map format version <= 22 - -- = 1 for map format version < 28 - -- = 2 since map format version 28 - u16 count of metadata - foreach count: - u16 position (p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X) - u32 num_vars - foreach num_vars: - u16 key_len - u8[key_len] key - u32 val_len - u8[val_len] value - u8 is_private -- only for version >= 2. 0 = not private, 1 = private - serialized inventory + if map format version <= 22: + 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. Format depends on type_id, see below. + if map format version >= 23: + u8 version -- Note: type was u16 for map format version <= 22 + -- = 1 for map format version < 28 + -- = 2 since map format version 28 + u16 count of metadata + foreach count: + u16 position (p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X) + u32 num_vars + foreach num_vars: + u16 key_len + u8[key_len] key + u32 val_len + u8[val_len] value + u8 is_private -- only for version >= 2. 0 = not private, 1 = private + serialized inventory - Node timers if map format version == 23: @@ -403,20 +420,18 @@ foreach static_object_count: 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 +if map format version < 29: + u32 timestamp + - Same meaning as the timestamp further up -u16 num_name_id_mappings + u8 name-id-mapping version + - Always 0 -foreach num_name_id_mappings - u16 id - u16 name_len - u8[name_len] name + u16 num_name_id_mappings + foreach num_name_id_mappings + u16 id + u16 name_len + u8[name_len] name - Node timers if map format version == 25: |