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Roblox DOM and (de)serialization implementation in Rust

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rbx-dom

rbx-dom is a collection of cross-platform libraries that enables any software to interact with Roblox instances.

Documentation about the project is hosted at dom.rojo.space.

At this moment, we do not specify a MSRV for any project in rbx-dom. If you need to build one of these libraries with an outdated version of Rust, please open an issue explaining what blockers there are to you updating Cargo, what version you would need us to support, and why.

rbx_dom_weak on crates.io rbx_dom_weak docs

Weakly-typed Roblox DOM implementation. Defines types for representing instances and properties on them.

rbx_types on crates.io rbx_types docs

Contains Roblox's value types like Vector3 and NumberSequence. Used by crates like rbx_dom_weak and a future rbx_dom_strong crate to let them share types and conversions.

rbx_xml on crates.io rbx_xml docs

Serializer and deserializer for for Roblox's XML model and place formats, rbxmx and rbxlx.

rbx_binary on crates.io rbx_binary docs

Serializer and deserializer for for Roblox's binary model and place formats, rbxm and rbxl.

rbx_reflection on crates.io rbx_reflection docs

Roblox reflection types for working with Instances in external tooling.

rbx_reflection_database on crates.io rbx_reflection_database docs

Bundled reflection database using types from rbx_reflection. Intended for users migrating from rbx_reflection 4.x and users who need reflection information statically.

Command line utility to generate a reflection database for rbx_dom_lua and rbx_reflection_database.

Command line utility to convert and debug Roblox model files.

Roblox Lua implementation of DOM APIs, allowing Instance reflection from inside Roblox. Uses a data format that's compatible with rbx_dom_weak to facilitate communication with applications outside Roblox about instances.

Property Type Coverage

Property Type Example Property rbx_types rbx_dom_lua rbx_xml rbx_binary
Axes ArcHandles.Axes
BinaryString Terrain.MaterialColors
Bool Part.Anchored
BrickColor Part.BrickColor
Bytecode N/A
CFrame Camera.CFrame
Color3 Lighting.Ambient
Color3uint8 Part.BrickColor
ColorSequence Beam.Color
Content Decal.Texture
Enum Part.Shape
Faces Handles.Faces
Float32 Players.RespawnTime
Float64 Sound.PlaybackLoudness
Font TextLabel.Font
Int32 Frame.ZIndex
Int64 Player.UserId
NumberRange ParticleEmitter.Lifetime
NumberSequence Beam.Transparency
OptionalCoordinateFrame Model.WorldPivotData
PhysicalProperties Part.CustomPhysicalProperties
ProtectedString ModuleScript.Source
Ray RayValue.Value
Rect ImageButton.SliceCenter
Ref Model.PrimaryPart
Region3 N/A
Region3int16 Terrain.MaxExtents
SharedString N/A
String Instance.Name
UDim UIListLayout.Padding
UDim2 Frame.Size
UniqueId `Instance.UniqueId
Vector2 ImageLabel.ImageRectSize
Vector2int16 N/A
Vector3 Part.Size
Vector3int16 TerrainRegion.ExtentsMax
QDir Studio.Auto-Save Path
QFont Studio.Font

✔ Implemented | ❌ Unimplemented | ➖ Partially Implemented | ⛔ Never

Outcome

This project has unveiled a handful of interesting bugs and quirks in Roblox!

  • GuiMain.DisplayOrder is uninitialized, so its default value isn't stable
  • MaxPlayersInternal and PreferredPlayersInternal on Players are scriptable and accessible by the command bar
  • Instantiating a NetworkClient will turn your edit session into a game client and stop you from sending HTTP requests
  • ContentProvider.RequestQueueSize is mistakenly marked as serializable
  • Trying to invoke game:GetService("Studio") causes a unique error: singleton Studio already exists
  • Color3 properties not serialized as Color3uint8 would have their colors mistakenly clamped in the XML place format. This was bad for properties on Lighting.
  • ColorSequence's XML serialization contains an extra value per keypoint that was intended to be used as an envelope value, but was never implemented.

Minimum Rust Version

rbx-dom supports Rust 1.63.0 and newer. Updating the minimum supported Rust version will only be done when necessary, but may happen as part of minor version bumps.

License

rbx-dom is available under the MIT license. See LICENSE.txt for details.

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Roblox DOM and (de)serialization implementation in Rust

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