> For the complete documentation index, see [llms.txt](https://docs.echo3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.echo3d.com/swift/using-the-sdk.md).

# Using the SDK

## Echo3D.swift:

Defines a class “Echo3D” that uses various methods in conjunction to SceneKit that communicate with the echo3D servers.

The following methods are Universal for Usage in iOS development:

* queryDatabase()
* parseDatabse()
* parseEntry()
* getEntries()

The following methods load models from your echo3D project into a scene:

* loadSceneAtIndex()
* loadSceneFromFilename()
* loadSceneFromEntryID()
* loadNodeFromIndex()
* loadAllNode()

*Customize implementation in a non-AR capacity by using the first list of functions to access and work with assets stored on echo3D.*

## Entry.swift

each asset stored on echo3D servers is an “entry”. This file constructs a class with attributes and files relevant to accessing and working with each entry / file.

## ViewController.swift

This file supports constructing an AR scene using SceneKit that is populated by files / models / entries stored on echo3D.

*If you are not intending to construct an AR application, this file can be ignored / removed from your project.*

## RemoteTransformation.swift

Applies changes made to an asset's metadata via the echo3D platform to assets in your scene at runtime.


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