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====== Legacy Protocol ======

A networking protocol used by the legacy client/server. It is built on the message format of the [[https://www.maartenbaert.be/game-maker-dlls/http-dll-2/|Http Dll 2]] GameMaker extension. Every message may be optionally compressed with deflate. Client and server will always attempt to decompress messages. Messages start with a byte specifying its message type.


===== Data types =====
All data types are little-endian.
^ Type      ^ Format                            ^
| String    | Null terminated UTF-8             |
| Byte      | 8-bit byte                        |
| Float     | 32-bit float                      |
| Boolean   | 8-bit byte, non-zero meaning true |
| Uint32                                        |
| Varint    | todo                              |
===== Server to client =====
==== Login (0x01) ====
Used for identifying the player logging in and creates the brick loading message.
^ Type      ^ Description           ^
| Uint32    | Net ID of player      |
| Uint32    | Brick count of world  |
| Uint32    | User ID of player     |
| String    | Username of player    |
| Boolean   | Is admin              |
| Byte      | Membership type       |
| Uint32    | Set ID                |
| String    | Set Name              |

==== Message (0x06) ====
Appends a message to the chat log.
^ Type      ^ Description  ^
| String    | Message      |
==== Set brick attribute (0x09) ====
^ Type    ^ Description     ^
| Uint32  | Net ID of brick |
| String  | Attribute type  |
=== Type: pos ===
Sets position of brick.
^ Type  ^ Description ^
| Float | X position  |
| Float | Y position  |
| Float | Z position  |
=== Type: rot ===
Old method of setting brick rotation. Only allows Z rotation to be set.
^ Type  ^ Description ^
| Uint32 | Z rotation  |
=== Type: rot2 ===
Sets brick rotation.
^ Type  ^ Description ^
| Int32 | X rotation  |
| Int32 | Y rotation  |
| Int32 | Z rotation  |
=== Type: scale ===
Sets brick scale.
^ Type  ^ Description ^
| Uint32 | X scale    |
| Uint32 | Y scale    |
| Uint32 | Z scale    |
Time is in milliseconds.
=== Type: kill ===
Activates physics on brick and remove brick from world after set time.
^ Type  ^ Description ^
| Uint32 | Time       |
Time is in milliseconds.
=== Type: destroy ===
Deletes brick from world.
^ Type  ^ Description ^
| Float | Color       |
=== Type: col ===
Sets color of brick.
^ Type  ^ Description ^
| Float | Color       |
=== Type: alpha ===
Sets transparency of brick.
^ Type  ^ Description ^
| Float | Alpha       |
Alpha value ranges from 0 to 1.
=== Type: lightcol ===
Sets light color of brick.
^ Type    ^ Description ^
| Uint32  | Color       |
=== Type: lightrange ===
Sets light range of brick.
^ Type    ^ Description  ^
| Uint32  | Mesh UUID    |
=== Type: model ===
Sets mesh on brick.
^ Type    ^ Description  ^
| String  | Mesh UUID    |
| String  | Texture UUID |
A mesh UUID of ''none'' will remove the mesh.
=== Type: clickable ===
Sets clickable status on brick.
^ Type    ^ Description       ^
| Boolean | Clickable enabled |
| Uint32  | Click distance    |
=== Type: collide ===
Sets collision of brick.
^ Type    ^ Description       ^
| Boolean | Collision enabled |
=== Type: global ===
Moves brick to the internal global cluster model.
==== Delete bricks (0x10) ====
Delete bricks from the world.
==== Create bricks (0x11) ====
Loads bricks into the world.
==== Clear world (0x0E) ====
Deletes all bricks from the world. No message data is specified.
==== Brick model (0x14) ====
<WRAP todo>
What happens if a brick model is defined for an already existing mesh ID? Knowing what happens may be useful information.
</WRAP>
Defines a mesh made out of bricks to the mesh cache. The model can then be used as a brick model or a hat by using the newly defined mesh ID.
^ Type      ^ Description           ^
| String    | Mesh ID               |
| Uint32    | Brick count of model  |
Bricks are defined for the number of bricks in model.
^ Type      ^ Description           ^
| Float     | X position            |
| Float     | Y position            |
| Float     | Z position            |
| Float     | X scale               |
| Float     | Y scale               |
| Float     | Z scale               |
| Int32     | X rotation            |
| Int32     | Y rotation            |
| Int32     | Z rotation            |
| Uint32    | Color                 |
| Float     | Alpha                 |
===== Client to server =====
todo