diff options
| -rw-r--r-- | doc/world_format.txt | 36 | ||||
| -rw-r--r-- | src/mapblock.h | 7 |
2 files changed, 33 insertions, 10 deletions
diff --git a/doc/world_format.txt b/doc/world_format.txt index a4fb3d8f2..976d14fd5 100644 --- a/doc/world_format.txt +++ b/doc/world_format.txt @@ -1,12 +1,13 @@ ============================= -Minetest World Format 22...25 +Minetest World Format 22...27 ============================= This applies to a world format carrying the block serialization version -22...25, used at least in +22...27, used at least in - 0.4.dev-20120322 ... 0.4.dev-20120606 (22...23) - 0.4.0 (23) - 24 was never released as stable and existed for ~2 days +- 27 was added in 0.4.15-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 @@ -262,15 +263,36 @@ u8 flags - 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. + - 0x04: lighting_expired: Not used in version 27 and above. 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. +u16 lighting_complete +- Added in version 27. +- This contains 12 flags, each of them corresponds to a direction. +- Indicates if the light is correct at the sides of a map block. + Lighting may not be correct if the light changed, but a neighbor + block was not loaded at that time. + If these flags are false, Minetest will automatically recompute light + when both this block and its required neighbor are loaded. +- The bit order is: + nothing, nothing, nothing, nothing, + night X-, night Y-, night Z-, night Z+, night Y+, night X+, + day X-, day Y-, day Z-, day Z+, day Y+, day X+. + Where 'day' is for the day light bank, 'night' is for the night + light bank. + The 'nothing' bits should be always set, as they will be used + to indicate if direct sunlight spreading is finished. +- Example: if the block at (0, 0, 0) has + lighting_complete = 0b1111111111111110, + then Minetest will correct lighting in the day light bank when + the block at (1, 0, 0) is also loaded. + u8 content_width - Number of bytes in the content (param0) fields of nodes if map format version <= 23: diff --git a/src/mapblock.h b/src/mapblock.h index c48f337e0..7ff613fe8 100644 --- a/src/mapblock.h +++ b/src/mapblock.h @@ -633,9 +633,10 @@ private: /*! * Each bit indicates if light spreading was finished * in a direction. (Because the neighbor could also be unloaded.) - * Bits: day X+, day Y+, day Z+, day Z-, day Y-, day X-, - * night X+, night Y+, night Z+, night Z-, night Y-, night X-, - * nothing, nothing, nothing, nothing. + * Bits (most significant first): + * nothing, nothing, nothing, nothing, + * night X-, night Y-, night Z-, night Z+, night Y+, night X+, + * day X-, day Y-, day Z-, day Z+, day Y+, day X+. */ u16 m_lighting_complete; |