This page documents the changes from the last stable Minecraft release (currently 1.4.6, protocol 51) to the current pre-release (or weekly release). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
Open Window (0x64)
Server to Client
This is sent to the client when it should open an inventory, such as a chest, workbench, or furnace. This message is not sent anywhere for clients opening their own inventory.
|Packet ID||Field Name||Field Type||Example||Notes|
|0x64||Window id||byte||123||A unique id number for the window to be displayed. Notchian server implementation is a counter, starting at 1.|
|Inventory Type||byte||2||The window type to use for display. Check below|
||The title of the window.|
|Number of Slots||byte||3||Number of slots in the window (excluding the number of slots in the player inventory).|
|Use provided window title||boolean||1||If false, the client will look up a string like "window.minecart". If true, the client uses what the server provides.|
|Total Size:||6 bytes + length of string|
Changed Data Types
Index 5, string: Mob Name
The name to be displayed on the nameplate above the entity (If Show nameplate = 1).
Index 6, byte: Show nameplate
Set to 1 to show the nameplate, otherwise it is not displayed.
Index 20, int: Block id & metadata
The id and metadata of the block to be shown in the minecart (If Show block = 1).
The block id can be obtained by: value & 0xFFFF.
The block metadata can be obtained by: value >> 16.
Index 21, int: Block position
The position (Y axis) of the block in the minecart. (Default: 6)
Index 22, byte: Show block
Set to 1 to show the block in the minecart, otherwise the block is not displayed.
13w03a: Protocol version is now 53. All Minecart entities use object type 10, and send the block within seperately.
13w02a: Added boolean to 0x64 (Open Window) to determine whether or not to use the provided window title.