1. Goals and definitions of virtual reality, augmented reality and Metavers

1.1 Goals

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1.1.1 The purpose of virtual reality

We need to take a step back from all the fields of activity that claim to exploit virtual reality. After reflection in the early 1990s, regardless of the technologies exploited, the purpose of virtual reality is to enable a user to act physically in an artificial environment, the latter being digitally created so that it can be modified. To act physically, the user must be immersed, which is achieved through several of his senses. Physical activity is achieved through...