Layout define the way the topology looks like. It may come with a data processor, not necessarily.
Just like data processors, there are a number of built-in layouts that provide you the typical functionality and presentation.
These are layouts NeXt is served with. We do recommend you to familiarize youself with them, as you will no longer need to create
This layout creates a hierarchy of nodes level by level. What you need is to tell NeXt what layer is the first, the second etc...
See code snippet on Codepen
US Map layout depicts the USA outline and provides geographic coordinate system (latitude and longitude) instead of a normal Cartesian system (with x- and y- axes). That prevents a developer from translating the geographic coordinates into [x;y] location, which requires some effort. However, access to them remains.
Here's how it might look like.
The distributive version of NeXt does not contain the World Map layout anymore, because it slows down the application's performance.
TBD
The following tutorial has a big practial application. It tells you about scene, which will give you access to many topology events.