# Terminology in XR These terms encompass the key concepts and technologies within the realm of Extended Reality (XR) and its various immersive technologies.
Extended Reality (XR) is an umbrella term that encompasses various immersive technologies, including Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). Here's a glossary of key terms related to XR: #### Virtual Reality (VR) A technology that immerses users in a computer-generated, three-dimensional environment, typically through a headset or goggles. Users can interact with and navigate this virtual world. #### Augmented Reality (AR) AR overlays digital information or virtual objects onto the real world, often viewed through a smartphone or AR glasses. It enhances the user's perception of the physical environment. #### Mixed Reality (MR) MR blends aspects of both VR and AR, allowing virtual and real-world elements to coexist and interact in the same space. Users can interact with digital objects while still being aware of the physical environment. #### Immersive Technology A general term for technologies that create immersive experiences, including VR, AR, and MR. #### Haptic Feedback Technology that provides tactile sensations to the user, such as vibrations or force feedback, to enhance the sense of touch in virtual environments. #### Headset A wearable device, often in the form of goggles or glasses, used for viewing VR, AR, or MR content. It typically includes a display, sensors, and audio capabilities. #### 3D Modeling The process of creating digital representations of objects or environments in three dimensions. 3D models are commonly used in XR applications. #### Teleportation In VR, this refers to a method of moving the user from one location or viewpoint to another within the virtual environment, often to prevent motion sickness. #### Field of View (FOV) The extent of the observable world or digital content a user can see through an XR device, typically measured in degrees. #### Motion Tracking Technology that captures and records the movement of a user's body or XR device. It's crucial for tracking user movements in virtual or augmented environments. #### Spatial Computing The integration of digital content into the physical world, allowing users to interact with virtual objects as if they were real. #### Hand Tracking A form of motion tracking that specifically tracks the movement and gestures of a user's hands, enabling natural interaction with XR content. #### Simulator Sickness A phenomenon similar to motion sickness that some users may experience in VR due to a disconnect between visual and physical motion cues. #### Avatar A digital representation of a user in a virtual environment, often customizable to reflect the user's preferences. #### Hologram A 3D projection or image that appears to be suspended in space, commonly associated with AR and MR technologies. #### Locomotion Methods and techniques for moving within a virtual environment, such as walking, teleporting, or using hand gestures. #### Latency The delay between a user's actions or movements and the corresponding response in the XR environment. Low latency is crucial for a smooth and immersive experience. #### XR Content Digital assets, applications, or experiences designed for XR platforms, including VR, AR, and MR. #### Gesture Recognition Technology that identifies and interprets hand or body movements as input commands within XR applications. #### Spatial Audio Audio that is positioned and adjusted in real-time to match the user's location and orientation within a virtual environment. #### Simultaneous Localization and Mapping (SLAM) A technology used in AR and MR to map and track the user's physical environment while placing virtual objects within it. #### Immersive Learning The use of XR technologies to create educational and training experiences that offer a higher level of engagement and interactivity. #### 360-Degree Video Video content that captures a panoramic view of a real-world or virtual environment, allowing viewers to look in any direction within the video. #### XR Development Kit A set of tools, hardware, and software provided to developers for creating XR applications and experiences. #### XR Interface The user interface and interaction design principles specific to XR environments, considering gestures, gaze, and voice commands.