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Interpretation of 9 kinds of AR/VR interactions to make you more aware of AR/VR
Virtual reality technology represents a key direction in the field of simulation technology. It combines multiple disciplines including simulation technology, computer graphics, human-computer interface technology, multimedia technology, sensor technology, network technology, and more. This makes it a challenging and cutting-edge interdisciplinary research area.
At its core, virtual reality technology (VR) primarily encompasses simulated environments, sensory experiences, natural interaction methods, and specialized equipment. The simulated environment refers to computer-generated, real-time, dynamic, three-dimensional, and realistic images. Sensory experiences go beyond just visual perception, incorporating auditory, tactile, force, motion, and even olfactory and gustatory sensations, collectively known as multi-sensory perception. Natural interaction involves movements such as head rotation, eye gaze, gestures, or other human behaviors, which the system processes and responds to in real time. Specialized equipment, such as three-dimensional interactive devices, further enhances this immersive experience.
Augmented reality (AR), also referred to as mixed reality, integrates real-world information with virtual content seamlessly. It allows users to perceive additional information in specific contexts that might be hard to experience directly in the real world. By combining computer technology and other scientific advancements, AR overlays virtual information onto the real world, enhancing sensory experiences beyond what is possible in reality. Real environments and virtual objects are often displayed together in real-time on the same screen or space.
In terms of interaction within VR and AR systems, motion capture plays a crucial role. For users to fully immerse themselves in a virtual environment, a reliable motion capture system is essential. While there are portable options like the Perception Neuron on the market, many solutions remain expensive or are still in developmental stages. Optical devices like Kinect offer alternative solutions in less demanding scenarios. However, full-body motion capture isn't always necessary, and the lack of haptic feedback remains a significant challenge in interaction design, making it difficult for users to feel their actions are impactful.
Haptic feedback, involving buttons and vibrations, is another critical aspect of VR interaction. Major VR headset manufacturers like Oculus, Sony, and HTC Valve have adopted virtual reality controllers as standard interactive tools. These controllers provide six degrees of freedom—three rotational and three translational axes—and include button presses and vibration feedback. While ideal for gaming and similar applications, these devices limit the scope of broader usage due to their specialized nature.
Eye-tracking technology stands out as one of the most promising advancements in VR. Oculus founder Palmer Luckey once described it as the "heart of VR" since it optimizes 3D effects based on the user's gaze, reducing latency and improving overall performance. Eye-tracking also aids in addressing VR-induced motion sickness by determining the viewer’s true focal point. Despite progress, satisfactory solutions remain elusive. Challenges lie in miniaturizing devices while maintaining functionality and developing effective algorithms to adjust images dynamically. Achieving naturalness and low latency would significantly enhance VR usability.
Another intriguing approach involves electromyography (EMG) simulations, exemplified by devices like Impacto. This VR boxing device combines tactile feedback with muscle electrical stimulation to mimic realistic sensations. By stimulating muscle contractions through electric currents, it creates the illusion of punching an opponent during gameplay. However, critics argue that current biotechnological limitations hinder precise replication of real-world feelings, suggesting that simpler vibration motors might suffice for most immersive purposes.
Despite ongoing challenges, VR and AR continue to evolve rapidly, offering exciting possibilities across industries from entertainment to healthcare. As research progresses, future developments promise increasingly sophisticated interactions that could redefine how we interact with digital worlds.