Investigating gestural interaction techniques for object manipulation in mixed reality.
Modified Oculus Quest 2, Gestural interactions, Vision design
Research, Ideation, Technical Pipeline, Programming, Prototyping
Aria Xiying Bao, Nix Liu Xin
Unreal Realm is a set of interoperable gestures across devices. It serves as a vision for how we could interact across different spaces enabled by spatial computing.
Screen-based devices have become the dominant medium through which we interact with digital content. Despite the variety of device types and screen sizes, our experience rests on a handful of touch gestures (swiping, pinching, tapping) that act as the backbone of mobile interactions today. Even with the emerging popularity of mixed-reality experiences today, screen space, AR space, and physical space have been in relative isolation.
What are the ways through which the boundaries between spaces can be blurred?
AR space: 3D virtual coordinate system overlayed onto a real-world camera feed
Physical space: the real world with tangible materials and matters
Narrowing down the scope - how might we make object customization intuitive in a mixed reality future?
Picking colors from physical space to screen space (Left)
Launching balls from AR space into screen space (Right)
Extract real textures and apply them to AR objects
Applying materials is a common function in 3D rendering and the product design process. The process of obtaining a material that mimics the real object is not intuitive and efficient enough. In our implementation, we propose that users can directly search for and extract materials from real-world objects, and transform them into digital content for further AR-based and screen-based creation. The user uses an ‘OK’ sign gesture that mimics a magnifier to indicate texture on a real object.
After the material is confirmed, a texture ball will be generated beside the user’s hand. The user drags the texture ball to the object to apply the texture.
Flip to show menu
The menu is designed to be displayed at the right side of the left palm when the user's palm is facing toward the user. To press a button in the hand menu, the user uses the non-dominant hand (right hand) to press the virtual button with the index finger.
Grab to manipulate
By grabbing virtual objects naturally, the user is able to move them to another position and orient them as they wish.
Scan to create a digital twin
We envision a gesture-based 3D scanning process that produces a digital twin in a seamless and intuitive way. The user moves the hand in one direction to perform the scan.
Pull to explode
Two hands moving apart diagonally while pinching is often a metaphor for opening things up. The user explodes the chair to have a closer look at the product’s structure. When the user moves the two hands closer while pinching, the exploded chair is manipulated back to its original state.
Swipe to flip through a catalog
The user swipes to flip through a virtual object catalog. This was inspired by the finger swiping motion prevalent in 2D screen interactions.
Point to delete
The user removes the virtual object via a pointing gesture.
For near-future work, we plan to conduct a within-subjects user study to investigate the elaborated sets of interaction techniques for cross-space content manipulation tasks. We are particularly interested in finding more about the practicality and consistency of the proposed techniques for these interaction tasks. For this, we design cross-level tasks with varied target sizes and respective destination areas to investigate whether the combined interaction techniques bring seamless transition between different spaces.
We mainly aim to receive both qualitative and quantitative user feedback to gain further insights into hand gesture interaction for cross-space workspace tasks. As a result, the goal of this evaluation was not to beat a certain baseline, but rather to see how people cope with the newly developed approaches for completing a given cross-space content manipulation task.
For a long-term future plan, we aim to establish a database platform that collects XR hand gesture catalogs. This platform aims to provide a reference for universal XR user experience design.