Transformable 3D interactive devices for virtual environments

点击翻译按钮获取中文摘要

The "Transformable 3D Interactive Devices for Virtual Environments (VE)" research program builds upon the previous NSERC Discovery Grant held by C. MacGregor. A significant outcome of that research was the design of a shape-changing input device (veBall, under patent review) for working in 3D space (e.g. VEs, 3D modelling and design). When veBall is in the form of a truncated sphere, the user can perform basic translation movements (e.g. panning and zooming). When the shape is changed to a full sphere, the user can rotate the virtual object in 3D space. This approach improves task performance and task usability as the change in shape allows for more natural grips and physical movements that map closely to what is happening on a screen. In addition, the veBall can be used for two-handed operation as an input device.  For example, when designing a 3D model the veBall can be used by one hand to rotate the model while the other hand uses a stylus or mouse to change the colour of selected components within the model. Since haptic feedback has been found to help in bimanual tasks we will explore creative solutions for including mechanisms for producing haptic feedback (i.e. providing a sense of touch or physical contact with a virtual object). To include this feedback in shape-changing devices, we will explore the following: depending on the task and shape, should we provide the user with a steady pulse or a series of vibrations; and how frequent should these signals be? Currently the most commonly used haptic devices range in cost from $2,000 to over $84,000 CDN. Our long term goal is to develop a set of low-cost (under $200 CDN) transformable interactive devices that can be used to facilitate 3D engineering and design activities; and to enhance spatial awareness and navigation in VEs used for training (e.g. search-and-rescue scenarios for emergency personnel; training children to develop spatial skills; and rehabilitation programs to help individuals regain use of hands and upper limbs). HQP will have opportunities to develop highly specialized skills in the areas of haptics, VEs and 3D simulations, along with usability design techniques important to industry for the design, development, and evaluation of consumer-based products.