Minecraft: Java Edition
Minecraft: Java Edition
November 18, 2011
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Attachment The United Nations Human Settlements Program (UN-Habitat) has a mission to create or improve 300 public spaces in the developing world by 2016. This led them towards Mojang in Sweden and their game Minecraft.
The partnership that spawned from this is called "Block by Block", which uses Minecraft to help teach young people in the planning of urban public spaces. Haiti, Nepal, India, Rwanda, and Kenya are countries undergoing projects with the help of said program.
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On the title screen, random splash text is displayed below the bottom right of the title. One example is "Let's Danec!". This is a typo Notch (the game creator) made while working on "Wurm Online".
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Attachment The SGU (Geological Survey of Sweden) released a mod for minecraft which adds more realistic geology in the game. For instance, gold can be panned out of river beds and the hardness of materials better reflects reality. This was created to increase public knowledge of geology.
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The achievement "On a Rail" shares its name with the eighth chapter in Half-Life, the 1998 first person shooter by Valve.
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Attachment The feature to feed parrots cookies to breed and tame was removed in a patch due to outcry from the Minecraft community. In real-life, chocolate cookies can kill birds if fed to them and people felt that children who played the game would try to copy this. The feature was changed prior to the release of patch 1.12.

Feeding cookies to parrots was also a subtle reference to the song "Polly" by the band Nirvana.
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Attachment One of the random title screen splash messages "Woo, /v/!", a reference to the dedicated video game imageboard "/v/" on website 4chan, was removed from the PC Java version of the game in update ver.1.17 released in 2021. It's unknown why it was removed, neither was it mentioned in the game's official patch notes, but it's presumably due to the controversial nature of the website which Microsoft may wish to distance themselves from.

During the game's early years, the game's creator Markus "Notch" Persson had heavily promoted the game on a number of websites including 4chan, which its success he partly attributed to the website.
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Attachment While the Evoker Illager is not engaged in combat and "/gamerule mobGriefing" is set to "true", it can change the color of the wool of any blue sheep within 16 blocks to red. It signals the spell by producing orange particles and making a "wololo" sound. This is a reference to the Priest special unit in Age of Empires who after making that sound can turn enemy units into friendly units, thereby changing that unit's color. Mojang's developers first noticed the similarities between the Priest and the Evoker in the latter's spell-casting animation when it holds up its arms, and because Age of Empires and Minecraft were both owned by Microsoft, they were able to use the same "wololo" audio clip from Age of Empires for the Evoker in Minecraft.
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If a Parrot is near a music box when the player inserts a music disc and plays music then the parrot will dance along with the music by bobbing it's head around.
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Attachment The End Poem that is displayed when entering the Exit Portal after defeating the Ender Dragon was written by Julian Gough, the singer and lyricist for the Irish alternative rock band Toasted Heretic, at the invitation of creator Markus Persson. In 2022, 11 years after the game's official release, Gough revealed that he had never formally signed a contract with Microsoft or Mojang when he wrote the poem, allowing him to retain copyright over it. In the same announcement, he released the poem into the public domain, encouraging fans to make their own derivative works based on it.
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Attachment Before version 18w07a (1.13), the height of large oak trees would be shared for each instance of the large tree generator created. Before Beta 1.8, this was not an issue since every time a large tree needed to be generated it used a new instance of the generator. However, from Beta 1.8 onward, each biome had its own large tree generator instance, resulting in naturally generated large trees sharing the same height per biome. These height values would remain the same until the game is restarted.
person BlueStaggo calendar_month October 28, 2023
The source code below is generated using RetroMCP for version 1.2.5 unless otherwise stated.

Around line 340 of WorldGenBigTree.java, this can be found:
[code]
if(this.heightLimit == 0) {
this.heightLimit = 5 + this.rand.nextInt(this.heightLimitLimit);
}
[/code]
This code randomises the height of generated large oak trees. However, this height limit is set once due to the [code]this.heightLimit == 0[/code] check.

Line 51 of BiomeGenBase.java shows the generator instance being created: [code]protected WorldGenBigTree worldGenBigTree = new WorldGenBigTree(false);[/code] The instance is unique for every biome created and is used whenever a biome has large trees in it. Therefore, large tree heights are unique per biome. This is not too noticable however, since these trees only generate in forests, extreme hills, ice plains, jungles and plains.

Between Alpha v1.2.0 and Beta 1.7.3, BiomeGenBase still controlled what trees were generated, but it used a new large tree generator instance every time, as seen on line 64: [code]return (WorldGenerator)(var1.nextInt(10) == 0 ? new WorldGenBigTree() : new WorldGenTrees());[/code] In earlier versions, new generator instances were still being created with the exception that the height was shared per chunk: in Alpha v1.1.2_01, the following code was used around line 380 in ChunkProviderGenerate.populate().

[code]
Object var18 = new WorldGenTrees();
if(this.rand.nextInt(10) == 0) {
var18 = new WorldGenBigTree();
}
[/code]

In the image attached to this submission, it shows a world generated in Minecraft Java Edition 1.9.4. The red sand border shows the border between chunks generated before and after game reset. Trees with sea lanterns are large trees generated before the reset and trees with glowstone are large trees generated after the reset.

This bug has its own report on the official bug tracker:
https://bugs.mojang.com/browse/MC-11208
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According to designer Jens Bergensten, when Creepers were added in the game's alpha build, Notch may have given them their green skin color so they could be camouflaged and blend in with the grass.
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