In Urho, you work with scenes that contain a tree of nodes. A node can be just about anything in the game, such as a renderer, a sound player, or simply a placeholder for subnodes.
As we talked about earlier when discussing AR fundamentals, planes are a common entity that is shared between the platforms. We need to create a common ground that represents a plane, which we can do by extending an Urho node. The position and the rotation will be tracked by the node itself, but we need to add a property to track the origin and the size of the plane, expressed by ARKit and ARCore as the extent of the plane.
We will add this class now and put it to use when we implement the AR-related code on each platform. The code to do this is straightforward, and can be set up by going through the following steps:
- In the WhackABox project root, create a new file called PlaneNode.cs.
- Add the following implementation of the class:
using Urho;
namespace WhackABox...
