| Resumo: | Traditionally, keyboards and 3D controllers such as the Wiimote have been used to interact with Virtual Environments. Despite being simple to use, these types of input devices have a number of limitations: xed layout, require the user to remember the mapping between buttons and functions and indirect manipulation of virtual objects, being done using buttons. This dissertation proposes the use of mobile devices to interact with immersive virtual environments. These devices allow to have exible interfaces and the touchscreen combined with the onboard sensors in smartphones and tablets allow for new interaction styles, in tasks such as direct selection and manipulation of virtual objects and navigation. In order to validate the system a Virtual Museum application was developed. Based on this system two studies addressing two open research questions related to immersive virtual environments: the user virtual embodiment and the interaction methods to use for navigation and selection. This dissertation provides new insights into the e ects of virtual embodiment and even if is not always as robust as the use of 3D controllers, the interaction using mobile devices is viable and o ers several interesting interaction possibilities.
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