imported>Greatman |
imported>Kashike |
| (26 intermediate revisions by 8 users not shown) |
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| | | #REDIRECT [[Entity metadata]] |
| == Entity Metadata Format ==
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| | |
| Note that entity metadata is a totally distinct concept from block metadata. All entities '''must''' send at least one item of metadata, in most cases this will be the health item.
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| | |
| The entity metadata format is quirky dictionary format, where the key and the value's type are packed in a single byte.
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| | |
| To parse, repeat the following procedure:
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| | |
| # Read an unsigned byte | |
| # If this byte == 127, stop reading
| |
| # Decompose the byte. <br> The bottom 5 bits (0x1F) serve as an identifier (key) for the data to follow. <br> The top 3 bits (0xE0) serve as a type.
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| # Read and unpack based on the type (below)
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| | |
| {| class="wikitable"
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| |-
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| ! Type
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| ! Meaning
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| |-
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| | 0
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| | byte
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| |-
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| | 1
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| | short
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| |-
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| | 2
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| | int
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| |-
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| | 3
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| | float<sup>*</sup>
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| |-
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| | 4
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| | string16
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| |-
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| | 5
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| | [[Slot Data|slot]]
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| |-
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| | 6
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| | int, int, int (x, y, z)
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| |}
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| | |
| <nowiki>*</nowiki>Not currently used
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| | |
| | |
| In C-like psuedocode:
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| <source lang="c">
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| do {
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| item = readByte();
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| if (item == 0x7F) break;
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| var index = item & 0x1F;
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| var type = item >> 5;
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|
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| if (type == 0) metadata[index] = readByte();
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| if (type == 1) metadata[index] = readShort();
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| if (type == 2) metadata[index] = readInt();
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| if (type == 3) metadata[index] = readFloat();
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| if (type == 4) metadata[index] = readString16();
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| if (type == 5) metadata[index] = readSlot();
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| if (type == 6) {
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| var vector;
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| vector.x = readInt();
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| vector.y = readInt();
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| vector.z = readInt();
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| metadata[index] = vector;
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| }
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| } while (true);
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| </source>
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| | |
| == Common Metadata ==
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| | |
| === Index 0, byte: Flags ===
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| | |
| All mobs, objects and players send metadata with index <code>0</code>. The value is a byte representing 8 boolean flags:
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| | |
| {| class="wikitable"
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| |- class="row0"
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| ! class="col0" | Bit index
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| ! class="col1" | Bit mask
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| ! class="col2" | Meaning
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| |- class="row1"
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| | class="col0" | 0
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| | class="col1" | 0x01
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| | class="col2" | Entity on fire
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| |- class="row2"
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| | class="col0" | 1
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| | class="col1" | 0x02
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| | class="col2" | Entity crouched
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| |- class="row3"
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| | class="col0" | 2
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| | class="col1" | 0x04
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| | class="col2" | Entity riding
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| |- class="row4"
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| | class="col0" | 3
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| | class="col1" | 0x08
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| | class="col2" | Sprinting
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| |- class="row4"
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| | class="col0" | 4
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| | class="col1" | 0x10
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| | class="col2" | Eating/Drinking/Blocking (any right click action?)
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| |- class="row5"
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| | class="col0" | 5
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| | class="col1" | 0x20
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| | class="col2" | Invisible
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| |}
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| | |
| === Index 1, short: Drowning counter ===
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| | |
| Initialized to <code>300</code> on entity spawn. When underwater, this is decremented by 3 every tick (and sent S->C with [[Protocol#0x28|Entity Metadata (0x28)]]). If the value dips below -19, an [[Protocol#0x26|Entity Status (0x26)]] is sent (i.e. the entity is hurt) and counter is reset to 0.
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| | |
| Seems to be sent for *at least* all mobs. Not sure about players.
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| | |
| === Index 8, int: Potion effects ===
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| Players and most (all?) mobs send metadata with index <code>8</code>. This specifies the colour of the bubbling effects around the player.
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| | |
| The value is an int, that should be decomposed into four bytes, representing <code>0x00RRGGBB</code>
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| | |
| If the value is 0, no potion effects currently apply to the entity.
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| | |
| === Index 12, int: Animals ===
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| | |
| 0 for ordinary animals.
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| | |
| Baby animals have the value -23999. This corresponds to the number of ticks in a minecraft day, which is how long it takes for a baby animal to "grow up". It is therefore considered likely that this field determines the size of the animal, and that Entity Metadata will update it as the animal grows.
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| When an animal becomes a parent this value is set to 6000 and is then decreased over time. Probably a countdown until they can have a new baby.
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| | |
| == Mobs ==
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| | |
| Mobs are spawned via [[Protocol#0x18|0x18 Mob Spawn]]
| |
| | |
| {| class="wikitable"
| |
| |- class="row0"
| |
| ! class="col0" | Type
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| ! class="col1" | Name
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| ! class="col2" | x, z
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| ! class="col3" | y
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| |- class="row1"
| |
| | class="col0" | 50
| |
| | class="col1" | Creeper
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| | class="col2" | 0.6
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| | class="col3" | 1.8
| |
| |- class="row2"
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| | class="col0" | 51
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| | class="col1" | Skeleton
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| | class="col2" | 0.6
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| | class="col3" | 1.8
| |
| |- class="row3"
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| | class="col0" | 52
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| | class="col1" | Spider
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| | class="col2" | 1.4
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| | class="col3" | 0.9
| |
| |- class="row4"
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| | class="col0" | 53
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| | class="col1" | Giant Zombie
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| | class="col2" | 3.6
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| | class="col3" | 10.8
| |
| |- class="row5"
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| | class="col0" | 54
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| | class="col1" | Zombie
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| | class="col2" | 0.6
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| | class="col3" | 1.8
| |
| |- class="row6"
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| | class="col0" | 55
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| | class="col1" | Slime
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| | class="col2" | 0.6 * size
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| | class="col3" | 0.6 * size
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| |- class="row7"
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| | class="col0" | 56
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| | class="col1" | Ghast
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| | class="col2" | 4
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| | class="col3" | 4
| |
| |- class="row8"
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| | class="col0" | 57
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| | class="col1" | Zombie Pigman
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| | class="col2" | 0.6
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| | class="col3" | 1.8
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| |- class="row9"
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| | class="col0" | 58
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| | class="col1" | Enderman
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| | class="col2" |
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| | class="col3" |
| |
| |- class="row10"
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| | class="col0" | 59
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| | class="col1" | Cave Spider
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| | class="col2" |
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| | class="col3" |
| |
| |- class="row11"
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| | class="col0" | 60
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| | class="col1" | Silverfish
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| | class="col2" |
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| | class="col3" |
| |
| |- class="row12"
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| | class="col0" | 61
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| | class="col1" | Blaze
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| | class="col2" |
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| | class="col3" |
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| |- class="row13"
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| | class="col0" | 62
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| | class="col1" | Magma Cube
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| | class="col2" | 0.6 * size
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| | class="col3" | 0.6 * size
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| |- class="row14"
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| | class="col0" | 63
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| | class="col1" | Ender Dragon
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| | class="col2" |
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| | class="col3" |
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| |- class="row14"
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| | class="col0" | 64
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| | class="col1" | Wither
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| | class="col2" |
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| | class="col3" |
| |
| |- class="row15"
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| | class="col0" | 65
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| | class="col1" | Bat
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| | class="col2" |
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| | class="col3" |
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| |- class="row16"
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| | class="col0" | 66
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| | class="col1" | Witch
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| | class="col2" |
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| | class="col3" |
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| |- class="row17"
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| | class="col0" | 90
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| | class="col1" | Pig
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| | class="col2" | 0.9
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| | class="col3" | 0.9
| |
| |- class="row18"
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| | class="col0" | 91
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| | class="col1" | Sheep
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| | class="col2" | 0.6
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| | class="col3" | 1.3
| |
| |- class="row19"
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| | class="col0" | 92
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| | class="col1" | Cow
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| | class="col2" | 0.9
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| | class="col3" | 1.3
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| |- class="row20"
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| | class="col0" | 93
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| | class="col1" | Chicken
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| | class="col2" | 0.3
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| | class="col3" | 0.4
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| |- class="row21"
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| | class="col0" | 94
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| | class="col1" | Squid
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| | class="col2" | 0.95
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| | class="col3" | 0.95
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| |- class="row22"
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| | class="col0" | 95
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| | class="col1" | Wolf
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| | class="col2" | 0.6
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| | class="col3" | 1.8
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| |- class="row23"
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| | class="col0" | 96
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| | class="col1" | Mooshroom
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| | class="col2" |
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| | class="col3" |
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| |- class="row24"
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| | class="col0" | 97
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| | class="col1" | Snowman
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| | class="col2" |
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| | class="col3" |
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| |- class="row25"
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| | class="col0" | 98
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| | class="col1" | Ocelot
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| | class="col2" |
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| | class="col3" |
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| |- class="row26"
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| | class="col0" | 99
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| | class="col1" | Iron Golem
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| | class="col2" |
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| | class="col3" |
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| |- class="row27"
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| | class="col0" | 120
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| | class="col1" | Villager
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| | class="col2" |
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| | class="col3" |
| |
| |}
| |
| | |
| === Extra Metadata ===
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| | |
| ==== Creeper ====
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| | |
| * Index '''16''' (byte): Status. Depends on the fuse, values from -1 to 1
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| * Index '''17''' (byte): Charged. <code>1</code> if the creeper has been hit by lightning, <code>0</code> otherwise.
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| | |
| ==== Spider / Cave Spider ====
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| | |
| * Index '''16''' (byte): Unknown, Values 0 and 1. Possibly aggression.
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| | |
| ==== Slime / Magma Cube ====
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| * Index '''16''' (byte): Size. Randomly-generated. <code>0</code>, <code>1</code>, <code>2</code> or <code>4</code>.
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| ==== Ghast ====
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| * Index '''16''' (byte): Aggression. <code>1</code> for aggressive (red eyes), <code>0</code> otherwise.
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| ==== Enderman ====
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| * Index '''16''' (byte): Item in hand
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| * Index '''17''' (byte): Item metadata
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| * Index '''18''' (byte): Aggression. <code>1</code> for aggressive, <code>0</code> otherwise.
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| ==== Blaze ====
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| * Index '''16''' (byte): Attacking. <code>1</code> sets the blaze on fire, and shortly after it will attack. <code>0</code> signals the end of the attack.#
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| ==== Ender Dragon ====
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| * Index '''16''' (short): Health. Full health = <code>200</code>
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| ==== Pig ====
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| * Index '''16''' (byte): Saddled. <code>1</code> if the pig is wearing a saddle, <code>0</code> otherwise.
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| ==== Sheep ====
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| * Index '''16''' (byte): bit 0x10 indicates shearedness. bits 0x0F indicate color (see below).
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| {| class="wikitable"
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| |- class="row0"
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| ! class="col0" | Index
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| ! class="col1" | Wool Color
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| |- class="row1"
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| | class="col0" | 0
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| | class="col1" | White
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| |- class="row2"
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| | class="col0" | 1
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| | class="col1" | Orange
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| |- class="row3"
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| | class="col0" | 2
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| | class="col1" | Magenta
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| |- class="row4"
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| | class="col0" | 3
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| | class="col1" | Light Blue
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| |- class="row5"
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| | class="col0" | 4
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| | class="col1" | Yellow
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| |- class="row6"
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| | class="col0" | 5
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| | class="col1" | Lime
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| |- class="row7"
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| | class="col0" | 6
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| | class="col1" | Pink
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| |- class="row8"
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| | class="col0" | 7
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| | class="col1" | Gray
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| |- class="row9"
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| | class="col0" | 8
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| | class="col1" | Silver
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| |- class="row10"
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| | class="col0" | 9
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| | class="col1" | Cyan
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| |- class="row11"
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| | class="col0" | 10
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| | class="col1" | Purple
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| |- class="row12"
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| | class="col0" | 11
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| | class="col1" | Blue
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| |- class="row13"
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| | class="col0" | 12
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| | class="col1" | Brown
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| |- class="row14"
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| | class="col0" | 13
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| | class="col1" | Green
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| |- class="row15"
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| | class="col0" | 14
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| | class="col1" | Red
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| |- class="row16"
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| | class="col0" | 15
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| | class="col1" | Black
| |
| |}
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| | |
| ==== Wolf ====
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| | |
| * <div class="li">Index '''16''' (byte): Flags (see below).
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| * Index '''17''' (string): Name of player that tamed wolf.
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| * Index '''18''' (int): Health. Values from 8 to 0
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| * Index '''19''' (byte): Unknown, either 0 or 1
| |
| | |
| {| class="wikitable"
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| |- class="row0"
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| ! class="col0" | Bit index
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| ! class="col1" | Bit mask
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| ! class="col2" | Meaning
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| |- class="row1"
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| | class="col0" | 0
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| | class="col1" | 0x01
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| | class="col2" | Sitting down
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| |- class="row2"
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| | class="col0" | 1
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| | class="col1" | 0x02
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| | class="col2" | Aggressive (red eyes)
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| |- class="row3"
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| | class="col0" | 2
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| | class="col1" | 0x04
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| | class="col2" | Tamed
| |
| |}
| |
| | |
| ==== Ocelot ====
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| | |
| * Index '''16''' (byte): Flags. Same as Wolf but without the Agressive flag.
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| * Index '''17''' (string): Name of player that tamed the ocelot.
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| * Index '''18''' (byte): Skin: 0 - ocelot, 3 - tamed cat, probably 1 and 2 too.
| |
| | |
| | |
| ==== Villager ====
| |
| * Index '''12''' (int): Same as index 12 of Animals, except that when the baby villager becomes a parent, no countdown starts.
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| * Index '''16''' (int): Profession of villager, as according to [http://www.minecraftwiki.net/wiki/Villager#Professions this].
| |
| | |
| ==== Iron Golem ====
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| | |
| * Index '''16''' (byte): 0 or 1. Indicates whether the iron golem was spawned by natural means (0) or by a player constructing it (1).
| |
| | |
| == Objects ==
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| | |
| Objects are spawned via [[Protocol#0x17|0x17 Spawn Object/Vehicle]]. See [[Object Data]] for more details.
| |
| | |
| {| class="wikitable"
| |
| |- class="row0"
| |
| ! class="col0" | ID
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| ! class="col1" | Name
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| ! class="col2" | x, z
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| ! class="col3" | y
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| |- class="row1"
| |
| | class="col0" | 1
| |
| | class="col1" | Boat
| |
| | class="col2" | 1.5
| |
| | class="col3" | 0.6
| |
| |- class="row1"
| |
| | class="col0" | 2
| |
| | class="col1" | Item Stack ([[Slot]])
| |
| | class="col2" | 0.5
| |
| | class="col3" | 0.5
| |
| |- class="row2"
| |
| | class="col0" | 10
| |
| | class="col1" | Minecart
| |
| | class="col2" | 0.98
| |
| | class="col3" | 0.7
| |
| |- class="row3"
| |
| | class="col0" | 11
| |
| | class="col1" | Minecart (storage)
| |
| | class="col2" | 0.98
| |
| | class="col3" | 0.7
| |
| |- class="row4"
| |
| | class="col0" | 12
| |
| | class="col1" | Minecart (powered)
| |
| | class="col2" | 0.98
| |
| | class="col3" | 0.7
| |
| |- class="row5"
| |
| | class="col0" | 50
| |
| | class="col1" | Activated TNT
| |
| | class="col2" | 0.98
| |
| | class="col3" | 0.98
| |
| |- class="row6"
| |
| | class="col0" | 51
| |
| | class="col1" | EnderCrystal
| |
| | class="col2" | 1.25?
| |
| | class="col3" | 2.25?
| |
| |- class="row7"
| |
| | class="col0" | 60
| |
| | class="col1" | Arrow (projectile)
| |
| | class="col2" | 0.5
| |
| | class="col3" | 0.5
| |
| |- class="row8"
| |
| | class="col0" | 61
| |
| | class="col1" | Snowball (projectile)
| |
| | class="col2" | 0.25
| |
| | class="col3" | 0.25
| |
| |- class="row9"
| |
| | class="col0" | 62
| |
| | class="col1" | Egg (projectile)
| |
| | class="col2" | 0.25
| |
| | class="col3" | 0.25
| |
| |- class="row10"
| |
| | class="col0" | 65
| |
| | class="col1" | Thrown Enderpearl
| |
| | class="col2" |
| |
| | class="col3" |
| |
| |- class="row11"
| |
| | class="col0" | 66
| |
| | class="col1" | Wither Skull
| |
| | class="col2" |
| |
| | class="col3" |
| |
| |- class="row12"
| |
| | class="col0" | 70
| |
| | class="col1" | Falling Objects
| |
| | class="col2" | 0.98
| |
| | class="col3" | 0.98
| |
| |- class="row12"
| |
| | class="col0" | 71
| |
| | class="col1" | Item frames
| |
| | class="col2" | ?
| |
| | class="col3" | ?
| |
| |- class="row13"
| |
| | class="col0" | 72
| |
| | class="col1" | Eye of Ender
| |
| | class="col2" |
| |
| | class="col3" |
| |
| |- class="row14"
| |
| | class="col0" | 73
| |
| | class="col1" | Thrown Potion
| |
| | class="col2" |
| |
| | class="col3" |
| |
| |- class="row15"
| |
| | class="col0" | 74
| |
| | class="col1" | Falling Dragon Egg
| |
| | class="col2" | 0.98
| |
| | class="col3" | 0.98
| |
| |- class="row16"
| |
| | class="col0" | 75
| |
| | class="col1" | Thrown Exp Bottle
| |
| | class="col2" |
| |
| | class="col3" |
| |
| |- class="row17"
| |
| | class="col0" | 90
| |
| | class="col1" | Fishing Float
| |
| | class="col2" | 0.25?
| |
| | class="col3" | 0.25?
| |
| |}
| |
| | |
| === Extra metadata ===
| |
| | |
| ==== Arrow ====
| |
| | |
| * Index '''16''' (byte): Unknown, either 0 or 1
| |
| | |
| ==== Minecart ====
| |
| | |
| * Index '''16''' (byte): Bitfield for flags, but the only known value is 1 if the minecart is powered and has fuel.
| |
| * Index '''17''' (int): Minecart shaking (When punched). Initialized to 0. Higher number gives a higher shaking.
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| * Index '''18''' (int): Unknown. Initialized to 1
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| * Index '''19''' (int): Damage taken. The cart breaks when this is over 40.
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| ==== Boat ====
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| * Index '''17''' (int): Time since last hit
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| * Index '''18''' (int): "Forward direction". Initialized to 1.
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| * Index '''19''' (int): Damage taken.
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| ==== Item Stack ([[Slot]]) ====
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| * Index '''10''' (slot): Item stack ([[Slot]])
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| ==== Item Frame ====
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| * Index '''2''' (slot): Item stack ([[Slot]])
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| * Index '''3''' (byte): Orientation (0-3, increments of 90 degrees)
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| == Other ==
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| Players are spawned via [[Protocol#0x14|0x14 Named Entity Spawn]]. They have dimensions 0.6 * 1.8.
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| Pickups are spawned via [[Protocol#0x15|0x15 Pickup Spawn]]. They have dimensions 0.25 * 0.25.
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| Paintings are spawned via [[Protocol#0x19|0x19 Entity: Painting]]. Their dimensions depend on their type.
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