How to get MeshId from Model upload? (Cloud Assets API)

[chickenputty (Adam)]

Hello!

I’m working with the Cloud API and have a question in regards to Model uploads (from fbx files).

When I upload the model with the Cloud API, it returns an ID. However, this ID is not a MeshId or a TextureId. It is a “Model”. It contains both the mesh and texture information.

@itsFrank17

Current default behavior is the following:

• FBX scene is imported as a single model/package asset
• The hierarchy under the model mirrors the hierarchy of the scene
• Each mesh in the FBX will be a unique MeshPart in the model

Examples:

FBX with a single mesh, file is called MyFile.fbx, mesh is called MyMesh

• Package (Model) named “MyFile”
  • MeshPart named “MyMesh”

The returned asset ID will be that of the package. The MeshPart will not be uploaded to your inventory.

How do I retrieve the MeshId from this Model upload (by its ID)?

For example, this model:

has this MeshId:

Is there an API to get this? I cannot find any.

Thanks!

[metatablecatmaid (metatablecat)]

https://assetdelivery.roblox.com/v1/asset?id=ID

Downloads the underlying asset for the given ID, you’ll get a RBXMX document, which is just XML, or RBXM, which will require a library in your given language to parse. From there, you can derive the mesh ID and download that, which will give you the mesh in Roblox’s internal format. (its converted before it hits the content server, so you cant retrieve the FBX)

[chickenputty (Adam)]

Perfect, thank you. Hopefully they add a newer endpoint for this soon :’)

[chickenputty (Adam)]

Hey! I’m trying now. I get the binary file downloaded, but cannot seem to parse it as XML or RBXM.

The binary file doesn’t have the version information in the header. Instead, it begins with <roblox! as the header.

I read that it is supposed to contain version information:

@Maximum_ADHD

Every mesh in Roblox starts with a header that is 12 characters in length, followed by a newline ( \n ) character. The header is represented in ASCII, and it is used to indicate what version of the mesh format is being used.

I’m able to open the file on Roblox Studio as RBXMX and RBXM. It is a Model that contains a MeshPart inside it.

How do I parse this binary file? Thanks