Published Aug 18th, 2012, 8/18/12 11:50 pm
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The demonstration illustrates how one could cause the spawn point of a map to change (in Minecraft 1.2.5) without the use of any mods. Such feature is exploited in the RPG/Adventure map Deja Vu, allowing the player to access different story lines, which are separated from each other. Pistons are used to determine which vertical position in the column containing the spawn point is available for spawning. The states of these pistons (on/off) are determined by the outcomes of the logical combinations of the redstone circuits associated with the story lines.
In this map, a similar piston setup is constructed. The spawn point should be located at (x, z) = (0, 0), on top of the gold block at the bottom of the tower. Levers are used to control which floor (indicated by wool blocks of various colors) is available for spawning. The spawning position is believed to be dictated by the rule that "...a player will spawn at the first suitable position above sea level at this location..." as mentioned in Minecraft Wiki. The lava pit is for suicidal use.
The complete URL of the links in the main description:
Deja Vu map - http://www.minecraftforum.net/topic/987941-rpgadv-deja-vu-the-reincarnation-of-steve-65000-downloads/
Minecraft Wiki (Spawn) - http://www.minecraftwiki.net/wiki/Spawn
The map was built upon the Sandstone Test World - http://www.minecraftworldmap.com/worlds/K3cGT
Some screenshots are made with the John Smith texture pack - http://www.minecraftforum.net/topic/26727-johnsmith-texture-pack-v95a-32x-13x-updated-0810/
Mods used when building this map (with versions compatible with 1.2.5):
TooManyItems - http://www.minecraftforum.net/topic/140684-132-toomanyitems-in-game-invedit-aug-16/
Single Player Commands - http://www.minecraftforum.net/topic/94310-125-single-player-commands-v322-official-download/
In this map, a similar piston setup is constructed. The spawn point should be located at (x, z) = (0, 0), on top of the gold block at the bottom of the tower. Levers are used to control which floor (indicated by wool blocks of various colors) is available for spawning. The spawning position is believed to be dictated by the rule that "...a player will spawn at the first suitable position above sea level at this location..." as mentioned in Minecraft Wiki. The lava pit is for suicidal use.
Additional Notes
As noted on the hosting page of Deja Vu, the world does not work in 1.3. This is the result of the merging of single player and multi-player modes, making the old spawning mechanism in the single player mode no longer valid. The map was built in 1.2.5. The map should work on both Survival and Creative modes.The complete URL of the links in the main description:
Deja Vu map - http://www.minecraftforum.net/topic/987941-rpgadv-deja-vu-the-reincarnation-of-steve-65000-downloads/
Minecraft Wiki (Spawn) - http://www.minecraftwiki.net/wiki/Spawn
The map was built upon the Sandstone Test World - http://www.minecraftworldmap.com/worlds/K3cGT
Some screenshots are made with the John Smith texture pack - http://www.minecraftforum.net/topic/26727-johnsmith-texture-pack-v95a-32x-13x-updated-0810/
Mods used when building this map (with versions compatible with 1.2.5):
TooManyItems - http://www.minecraftforum.net/topic/140684-132-toomanyitems-in-game-invedit-aug-16/
Single Player Commands - http://www.minecraftforum.net/topic/94310-125-single-player-commands-v322-official-download/
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- The single player mode is internally implemented as a multi-player server since 1.3.
- The player spawning mechanism is inherited accordingly. (?)
- According to the wiki page, "A player with no spawn point set o ¦ will be placed randomly at the highest point in a 20x/20z square centered on the x-/z- corner of the spawn point."
- Since the spawning position is randomly chosen, it is impossible for the creator of the map to predict where a player is going to (re)spawn at.
- The random number generator, no matter how good it is, is after all a pseudo one.
- The numbers that a pseudo-random number generator create (unless Minecraft somehow uses a truly random seed...) can be predicted or traced, at least in principle.
- If the seed is "dynamic", say, depending on your computer's time, the results will be different each time the map is loaded.
So I think it is impossible for the "relocation" to work now, without the use of any mod.
- If the seed is "static", say, depending on the world map seed, resetting each time, the creator can test the spawning position by trials. But personally I don't think the seed is likely to be in such a "static" way...