The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We developed a new hand model for increasing the robustness of finger-based manipulations of virtual objects. Each phalanx of our hand model consists of a number of deformable soft bodies, which dynamically adapt to the shape of grasped objects based on the applied forces. Stronger forces directly result in larger contact areas, which increase the friction between hand and object as would occur in...
We present a study that compares finger-based direct interaction to controller-based ray interaction in a CAVE as well as in head-mounted displays. We focus on interaction tasks within reach of the users' arms and hands and explore various feedback methods including visual, pressure-based tactile and vibro-tactile feedback. Furthermore, we enhanced a precise finger tracking device with a direct pinch-detection...
The Globefish is a novel desktop input device for three-dimensional object manipulation and viewpoint navigation. It consists of an elastically suspended 3D trackball, which provides a natural mapping for position-controlled 3D rotations. Rate-controlled 3D translations are performed by pushing the trackball into the appropriate direction. The device is manipulated by the fingertips allowing for precise...
We are investigating the utility of a projection-based stereoscopic two-user system for applications in the automotive industry. In this paper we compare real-world pointing to pointing at virtual objects in a two-user scenario. In our study we investigated the following situation: One user points at an object while the second person has to guess the referenced object. Our results indicate that pointing...
The Globefish is a novel desktop input device for efficient three-dimensional object manipulation and viewpoint navigation. The device was developed for the 3D graphics applications such as computer aided design (CAD), digital content creation (DCC) and 3D games. The Globefish consists of an elastically suspended 3D trackball, which provides a natural mapping for position-controlled 3D rotations....
Access control is an important aspect of shared virtual environments. Resource access may not only depend on prior authorization, but also on context of usage such as distance or position in the scene graph hierarchy. In virtual worlds that allow user-created content, participants must be able to define and exchange access rights to control the usage of their creations. Using object capabilities,...
The automotive industry uses physical seating bucks, which are minimal mockups of a car interior, to assess various aspects of the planned interior early in the development process. In a virtual seating buck, users wear a head-mounted display (HMD) which overlays a virtual car interior on a physical seating buck. We have developed a two-user virtual seating buck system, which allows two users to take...
Multi-frame rate rendering is a parallel rendering technique that renders interactive parts of the scene on one graphics card while the rest of the scene is rendered asynchronously on a second graphics card. The resulting color and depth images of both render processes are composited and displayed. This paper presents advanced multi-frame rate rendering techniques, which remove limitations of the...
Stereo displays suffer from crosstalk, an effect that reduces or even inhibits the viewer's ability to correctly perceive depth. Previous work on software crosstalk reduction focussed on the preprocessing of static scenes which are viewed from a fixed viewpoint. However, in virtual environments scenes are dynamic, and are viewed from various viewpoints in real-time on large display areas. In this...
We propose a conceptual extension of the standard triangle-based graphics pipeline by an additional intersection stage. The corresponding intersection program performs ray-object intersection tests for each fragment of an object's bounding volume. The resulting hit fragments are transferred to the fragment shading stage for computing the illumination and performing further fragment operations. Our...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.