A common operation performed in Virtual Reality (VR) environments is locomotion. Although real walking can represent a natural and intuitive way to manage displacements in such environments, its use is generally limited by the size of the area tracked by the VR system (typically, the size of a room) or requires expensive technologies to cover particularly extended settings. A number of approaches have been proposed to enable effective explorations in VR, each characterized by different hardware requirements and costs, and capable to provide different levels of usability and performance. However, the lack of a well-defined methodology for assessing and comparing available approaches makes it difficult to identify, among the various alternatives, the best solutions for selected application domains. To deal with this issue, this article introduces a novel evaluation testbed which, by building on the outcomes of many separate works reported in the literature, aims to support a comprehensive analysis of the considered design space. An experimental protocol for collecting objective and subjective measures is proposed, together with a scoring system able to rank locomotion approaches based on a weighted set of requirements. Testbed usage is illustrated in a use case requesting to select the technique to adopt in a given application scenario.

中文翻译：

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虚拟现实中的移动性评估测试平台

在虚拟现实（VR）环境中执行的常见操作是移动。尽管实际步行可以代表一种自然而直观的方式来管理此类环境中的位移，但是其使用通常受到VR系统跟踪的区域大小（通常是房间大小）的限制，或者需要昂贵的技术来覆盖特别的范围设置。已经提出了许多方法来实现对VR的有效探索，每种方法都具有不同的硬件要求和成本，并且能够提供不同级别的可用性和性能。但是，由于缺乏定义明确的方法来评估和比较可用的方法，因此很难在各种替代方案中为选定的应用领域确定最佳解决方案。为了解决这个问题，本文介绍了一种新颖的评估测试平台，该评估平台以文献中报告的许多独立作品的成果为基础，旨在支持对所考虑的设计空间进行全面分析。提出了一种收集客观和主观措施的实验方案，以及一个能够基于加权需求集对移动方法进行排名的评分系统。在一个用例中说明了测试平台的用法，该用例要求选择在给定应用场景中要采用的技术。加上评分系统，该评分系统能够根据一组加权要求对运动方法进行排名。在一个用例中说明了测试平台的用法，该用例要求选择在给定应用场景中要采用的技术。加上评分系统，该评分系统能够根据一组加权要求对运动方法进行排名。在一个用例中说明了测试平台的用法，该用例要求选择在给定应用场景中要采用的技术。