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Minecraft Snapshot 12w07b
As announced yesterday, Snapshot 12w07b has been released a day early. Among other things, this snapshot includes the addition of a new light source as well as multiple changes to AI and a new file format for Minecraft worlds. Mojang's official blog post for this snapshot can be found here.
The list of changes for this snapshot includes:
- Added new world file format called “Anvil” (256 max height and 4096 block IDs** See note below).
- Multi-player light calculations do no longer cause affected blocks to be transmitted to the clients, instead the clients will recalculate the light on their own.
- Villagers will repopulate villages based on how many houses there are available. AI programmer Jon explains what a "house" is here.
- Some nights in villages will be worse than others… There's word of zombie sieges on minecraftforum.net.
- Added a redstone-controlled light source. Info on the new redstone lamp can be found here.
- Decreased chance for the rare mob drops.
- All animals use the new AI system now.
** The game can’t use the full range of IDs yet because there are still some assumptions that IDs above 256 are items. **
- Multi-player light calculations do no longer cause affected blocks to be transmitted to the clients, instead the clients will recalculate the light on their own.
- Villagers will repopulate villages based on how many houses there are available. AI programmer Jon explains what a "house" is here.
- Some nights in villages will be worse than others… There's word of zombie sieges on minecraftforum.net.
- Added a redstone-controlled light source. Info on the new redstone lamp can be found here.
- Decreased chance for the rare mob drops.
- All animals use the new AI system now.
** The game can’t use the full range of IDs yet because there are still some assumptions that IDs above 256 are items. **
Downloads:
- Client: http://assets.minecraft.net/12w07b/minecraft.jar
- Server: http://assets.minecraft.net/12w07b/minecraft_server.jar
In order to use the new snapshot, you will have to locate your Minecraft bin folder, and manually replace the minecraft.jar file (or the appropriate server files if you are running a server).
Info on things to come in Minecraft
According to Jens' recent tweet, the next Minecraft snapshot may be released a day early. He also posted on Mojang's blog about the upcoming changes for Minecraft, which includes some exciting new changes in preparation for the official mod API that is estimated to be released sometime this spring.
Here's a list of upcoming changes we can look forward to:
- Maximum build height has been increased to 256 (was 128)
- Empty sections of the world are not loaded into memory
- Block ids have been increased to 4096 (was 256) by adding a 4 bit data layer (similar to how meta data is stored)
- Block ordering have been changed from x/z/y to y/z/x in order to improve compression
- Packets for sending chunks have been updated (a full 128-high chunk is smaller than the old format, and a chunk with lots of empty space is much smaller)
- Biomes are saved per x/z column, which means they can be altered by tools
- The 16x128x16 “Blocks”, “Data”, “SkyLight” and “BlockLight” tags are removed
- A “Sections” tag has been added with up to 16 compound tags
- Each section has 16x16x16 “Blocks”, “Data”, “SkyLight” and “BlockLight” tags
- Each section has a “Y” integer tag saying which section it is (note that some Y positions can be skipped). 0 is at the bottom of the world and 15 is the topmost section
- Each section also has a “AddBlocks” tag, which is a DataLayer byte array just like “Data”. The “AddBlocks” tag is not included in the converter since the old format never had block ids above 255. This extra tag is created whenever a block requires it, so the getTile() method needs to check if the array exists and then combine it with the default block data. In other words, blockId = (addBlock << 8) + baseId.
- Each chunk has a 16×16 byte array with biome ids called “Biomes”. If this array is missing it will be filled when the game starts. The converter doesn’t include any biome sources, though (it had too many dependencies to be included).
- Note that the old format is XZY and the new format is YZX (see the difference between DataLayer and OldDataLayer).
- The new format uses the extension “.mca” instead of “.mcr” (the old format is kept for safety, with the level.dat backed up as “level.dat_mcr”)
- Empty sections of the world are not loaded into memory
- Block ids have been increased to 4096 (was 256) by adding a 4 bit data layer (similar to how meta data is stored)
- Block ordering have been changed from x/z/y to y/z/x in order to improve compression
- Packets for sending chunks have been updated (a full 128-high chunk is smaller than the old format, and a chunk with lots of empty space is much smaller)
- Biomes are saved per x/z column, which means they can be altered by tools
- The 16x128x16 “Blocks”, “Data”, “SkyLight” and “BlockLight” tags are removed
- A “Sections” tag has been added with up to 16 compound tags
- Each section has 16x16x16 “Blocks”, “Data”, “SkyLight” and “BlockLight” tags
- Each section has a “Y” integer tag saying which section it is (note that some Y positions can be skipped). 0 is at the bottom of the world and 15 is the topmost section
- Each section also has a “AddBlocks” tag, which is a DataLayer byte array just like “Data”. The “AddBlocks” tag is not included in the converter since the old format never had block ids above 255. This extra tag is created whenever a block requires it, so the getTile() method needs to check if the array exists and then combine it with the default block data. In other words, blockId = (addBlock << 8) + baseId.
- Each chunk has a 16×16 byte array with biome ids called “Biomes”. If this array is missing it will be filled when the game starts. The converter doesn’t include any biome sources, though (it had too many dependencies to be included).
- Note that the old format is XZY and the new format is YZX (see the difference between DataLayer and OldDataLayer).
- The new format uses the extension “.mca” instead of “.mcr” (the old format is kept for safety, with the level.dat backed up as “level.dat_mcr”)
Minecraft Snapshot 12w06a
Mojang has released snapshot number 12w06a for Minecraft today.
This week's snapshots include the following:
- Many minor bug fixes and tweaks
- Doors have been changed to properly detect if they are open or closed. Double doors in existing maps will need to be updated
- Villagers will move indoors during night and rain, and socialize with each other
- Zombies will break down wooden doors on hard difficulty
- Added cat sounds
- Better movement for mobs in water
- Added rare mob item drops
- Doors have been changed to properly detect if they are open or closed. Double doors in existing maps will need to be updated
- Villagers will move indoors during night and rain, and socialize with each other
- Zombies will break down wooden doors on hard difficulty
- Added cat sounds
- Better movement for mobs in water
- Added rare mob item drops
If you wish to download this snapshot, you can either head over to Mojang's blog or click on the following links. These snapshots will not install themselves and must be manually installed into your Minecraft bin folder.
Minecraft Snapshot 12w05a
The newest Minecraft snapshot is available for testing. The list of features appears to be smaller than the past couple of weeks, but the features include various behavioral changes involving mob behavior.
Here's a list of features:
- Many mob-related bug fixes (and some new behaviors)
- Ocelots are easier to tame, and cats can be told to sit
- Many small bug fixes and tweaks
- Villagers will try to detect village houses and live in them
- Updated language files (now with 50% less profanities!)
- Ocelots are easier to tame, and cats can be told to sit
- Many small bug fixes and tweaks
- Villagers will try to detect village houses and live in them
- Updated language files (now with 50% less profanities!)
Mojang's official blog post about this update can be found here.
Direct links for the update can be found here. Like all other snapshots, they must be installed manually.
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