Loader#physics()

Adds a physics data file to the current load queue.

The data must be in Lime + Corona JSON format. Physics Editor by code'n'web exports in this format natively.

You can choose to either load the data externally, by providing a URL to a json file.
Or you can pass in a JSON object or String via the data parameter.
If you pass a String the data is automatically run through JSON.parse and then immediately added to the Phaser.Cache.

If a URL is provided the file is not loaded immediately after calling this method, but is added to the load queue.

The key must be a unique String. It is used to add the file to the Phaser.Cache upon successful load.

Retrieve the file via Cache.getJSON(key). JSON files are automatically parsed upon load.
If you need to control when the JSON is parsed then use Loader.text instead and parse the text file as needed.

The URL can be relative or absolute. If the URL is relative the Loader.baseURL and Loader.path values will be prepended to it.

If the URL isn't specified and no data is given then the Loader will take the key and create a filename from that.
For example if the key is "alien" and no URL or data is given then the Loader will set the URL to be "alien.json".
It will always use .json as the extension.

If you do not desire this action then provide a URL or data object.