*Software Usability*

similar results. In fact, defining a grid of points is equivalent to defining a sampling frequency: if the number of samples is too low, we can in fact obtain" aliasing", getting this way an imprecise representation of the mathematical function we want to show.

In order to improve performance, it was decided to proceed according to this path:


In other words, the complexity of the figures in terms of vertices has been reduced but this is absolutely not perceived by the user who observes them without noticing any difference.

The Augmented Reality (AR) environment uses the Vuforia framework. The program created is an Android Package Kit (APK), which can be installed on Android smartphones with 7.0+ operating system. Vuforia is a Software Development Kit (SDK) that enable the users to analyze the video stream recorded in real time by the phone camera. Vuforia enables the creation of a database of markers (called Vumark), manually associated to the game objects of the scene.
