Passive tactile scheme for multiple virtual targets in VR large space

Abstract

The invention discloses a multi-virtual-target passive tactile scheme in a VR large space, two physical agents are used for alternately providing tactile feedback for a plurality of virtual targets, and the defect that when only one physical agent is used for providing tactile sense for continuous virtual objects, the walking direction of a user needs to be reversed by a large angle through redirection walking is overcome. The multi-virtual-target passive tactile scheme comprises the following steps: S1, pre-designing a path, S2, designing the position and angle of a virtual object, S3, redirecting a user to an interaction position by using a redirection walking algorithm, S4, interacting, improving the interaction experience and accuracy through pre-interaction alignment and tactile redirection technologies, and obtaining a multi-virtual-target passive tactile scheme. And S5, determining whether a 2: 1 rotation algorithm needs to be started or not according to the next virtual target position. According to the method, the position error caused by unfixed coordinate mapping of the physical environment and the virtual environment due to redirection walking is solved, and relatively accurate tactile feedback is provided for a user in the virtual environment.

Description

technical field [0001] The invention relates to the technical field of virtual reality, in particular to a passive haptic solution for multiple virtual targets in a large VR space. Background technique [0002] Virtual reality technology is a computer simulation system that can create and experience virtual worlds. It uses computers to generate a simulation environment. Immersion into the environment, in virtual reality, immersion and interactivity have been in the spotlight, and in the past few years, walk redirection and haptic redirection technologies have emerged, the former focusing on expanding out of smaller physical spaces. Larger virtual space, the latter makes it possible to provide real tactile feedback for complex virtual scenes. The present invention combines the characteristics of redirected walking and tactile redirection, which not only realizes the expansion of virtual space, but also utilizes tactile redirection. technology that implements a physical agent...

AI Technical Summary

Problems solved by technology

[0002] Virtual reality technology is a computer simulation system that can create and experience a virtual world. It uses a computer to generate a simulated environment. Immersed in this environment, in virtual reality, immersion and interactivity have always attracted much attention. In the past few years, walking redirection and tactile redirection technologies have appeared successively. Larger virtual space, the latter makes it possible to provide real tactile feedback for complex virtual scenes. This invention combines the characteristics of redirected walking and tactile redirection, which not only realizes the expansion of virtual space, but also uses tactile redirection Technology, realize a physical agent to provide real tactile feedback for multiple different objects in the virtual scene, as a roaming scheme of the virtual scene using natural walking, redirected walking can provide a high level of presence and real physical motion feeling, Relatively speaking, the cost is small, but in order to break through the limitation of space size in the real world, most of the redirected walking algorithms change the mapping relationship between physical motion and virtual motion by rotating the virtual world, but provide users with real Haptic feedback also requires that the coordinate mapping between the virtual world and the real world is fixed. The change of this mapping relationship will make it very difficult to provide tactile feedback for redirected walking users. These two requirements are usually mutually exclusive. of

[0003] In order to solve the above contradictions, related studies provide some solutions, Kohli et al. describe a method that takes the user from one virtual base to another while physically returning to the same base, choosing The cylindrical base avoids angular errors because of its rotation invariance; users can approach it from any angle, and it is still rotationally aligned with the virtual base. Jerald Thomas et al. proposed an alignment method that utilizes artificial The concept of potential field, and put forward an alignment condition to ensure that the user reaches the position of the virtual agent in the virtual space and at the same time reach the physical agent in the real space, but the experiments in this article are all done through the simulator, and It does not provide users with real tactile feedback, and the experimental results show that the distance and angle errors after reaching the target point are relatively obvious. From the experimental results, the average error of the distance is at least 20cm or more, which is not shown in the experimental data. The error of the angle and no actual user experience

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