Save and Load#

Save JSON#

Click Save JSON to download the current scene as a .json file. The file contains full B-Rep data for every object, including:

• Object UUIDs
• Complete solid geometry (no tessellation loss)
• Exact mathematical surface definitions

Load JSON#

Click Load JSON to restore a previously saved scene. This replaces the current scene with the loaded one.

File Format#

The JSON format stores an array of objects, each with:

[
  {
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "solid": { ... }
  }
]

The solid field contains the truck B-Rep serialization — vertices, edges, faces, and surface definitions.

Example Scenes#

The Load example dropdown provides pre-built scenes:

• Default cube
• Two overlapping cubes
• Multi-primitive scene
• Boolean subtract result
• Complex assembly

Automerge Documents#

Beyond JSON save/load, scenes are also persisted via Automerge documents:

• New Doc — creates a fresh Automerge document
• Share — copies the document URL for collaborative editing
• Documents sync across tabs via BroadcastChannel
• Each document has a unique automerge: URL