How to save files in (.usdz)? Is this a wrapper around OpenUSD?

[VanshJohri24]

I have one usda file which is referencing 3usdz file and it’s related textures. How can i Save all these files under a single usdz file that can be shared across the platforms?

[furby-tm]

Is this a wrapper around OpenUSD?

I'll answer your second question in this comment, then follow up in a new comment with an answer to your first question.

Is the PixarUSD Swift target a Swift wrapper around OpenUSD?

Effectively yes, the PixarUSD is a single monolithic Swift import, usage like:

import PixarUSD

// so that you can utilize a safer, more "swifty" native
// Swift API with USD, alternative to unsafe/weird C++
// types and paradigms, and away from the C world of things
// like `std.string`, in favor of native Swift types like
// `String`.
@main
enum Creator
{
  static func main()
  {
    /* Setup all usd resources (python, plugins, resources). */

    Pixar.Bundler.shared.setup(.resources)

    /* Create a new USD stage with a transform and a sphere. */

    let stage = Usd.Stage.createNew("HelloPixarUSD.usda")

    UsdGeom.Xform.define(stage, path: "/Hello")
    UsdGeom.Sphere.define(stage, path: "/Hello/World")

    stage.getPseudoRoot().set(doc: "Hello World Example (Swift)!")

    stage.save()
  }
}

That same code would alternatively look like the following, if your preference was to use the "raw c++" interop bindings, instead of the monolithic swift PixarUSD target.

import CxxStdlib
import Foundation
import Sdf
import Usd
import UsdGeom

@main
enum Creator
{
  static func main()
  {
    /* Create a new USD stage with a transform and a sphere. */

    let stage = Pixar.Usd.Stage.CreateNew(std.string("HelloPixarUSD.usda"), .LoadAll)

    Pixar.UsdGeomXform.Define(stage.pointee.getPtr(), Pixar.SdfPath(std.string("/Hello")))
    Pixar.UsdGeomSphere.Define(stage.pointee.getPtr(), Pixar.SdfPath(std.string("/Hello/World")))

    stage.pointee.GetPseudoRoot().SetDocumentation(std.string("Hello World Example (Swift)!"))

    stage.pointee.Save()
  }
}

[furby-tm]

How to save files in (.usdz)?

I have one usda file which is referencing 3usdz file and it’s related textures. How can i Save all these files under a single usdz file that can be shared across the platforms?

The entirety of the USD API has not yet been wrapped into Swift, but for now I believe the following should do what you're looking for:

import CxxStdlib
import PixarUSD

// open your usda file referencing your other files/textures.
let stage = Usd.Stage.open("Path/To/MyUsdaFile.usda")

// export your usda file as a single usdz file.
// note: tad bit ugly because this function hasn't
// yet been wrapped in swift.
stage.pointee.Export(
  /*newFilename=*/std.string("MySingleUSDzFile.usdz"),
  /*addSourceFileComment=*/true,
  /*args=*/Pixar.SdfLayer.FileFormatArguments()
)

[furby-tm]

Note

Currently the monolithic PixarUSD swift target is responsible for all the native "swifty" api
wrappers around OpenUSD, eventually all the library targets which make up PixarUSD
(Arch, Tf, UsdGeom, etc.) will be turned into their own respective swift wrappers
around those libraries, so that the single, massive PixarUSD target is not the only way to
import the cleaner "swifty" api wrappers around their OpenUSD counterparts.

These improvements -- along with the ability to slim USD down in Swift, along with lots of other improvements like supporting the building of 3rd party plugins to be built/linked with SwiftUSD (without CMake) for use in other DCC applications like Maya or Blender, are happening in the feature/3rd-party-plugin-building branch, led by @gracien-app's efforts.