Pre-release protocol
This page documents the changes from the last stable Minecraft release (currently 1.3.2) to the current pre-release (or weekly release).
New packets
-None-
Changed packets
Time Update (0x04)
Server to Client
Time is based on ticks, where 20 ticks happen every second. There are 24000 ticks in a day, making Minecraft days exactly 20 minutes long.
The time of day is based on the timestamp modulo 24000. 0 is sunrise, 6000 is noon, 12000 is sunset, and 18000 is midnight.
The default SMP server increments both by 20 every second.
The 'Time' is the Age of the world. It is not changing on server commands and will increased by 20 every second.
| Packet ID | Field Name | Field Type | Example | Notes |
|---|---|---|---|---|
| 0x04 | Time | long | 45464654 | The 'Age of the world', in ticks |
| Day Time | long | 21321 | The world (or region) time, in ticks | |
| Total Size: | 17 Bytes | |||
Spawn Named Entity (0x14)
New rule for Metadata.
Spawn Dropped Item (0x15)
TODO
It would appear as though it also includes similar changes to how metadata is sent. It includes a new byte array after the "Damage" field, and before the "X" field if certain conditions are met. If the array does not exist, then the length of the array is "-1".
Spawn Mob (0x18)
New rule for Metadata.
Entity Metadata (0x28)
New rule for Metadata.
Changed data types
Metadata
When sending metadata, if the entity type is 5 (presumed to be item drop?) and the metadata does not exist, then its "id" field is sent as '-1', and the "count" and "damage" fields are not sent.
Removed packets
-None-
Protocol History
2012-09-06
- 12w36a
- Protocol version is now 42
2012-08-24
- 12w34b
- Protocol version is now 41
- In Entity metadata the slot type (5) can now be empty. Instead of (short, byte, short), only -1 as a short is sent. This affects 0x14 Spawn Named Entity, 0x18 Spawn Mob and 0x28 Entity Metadata
2012-08-09
- 12w32a
- Protocol version is now 40
- Changed Time Update packet