【目的】传统园林景观构建需要通过手绘平面图纸、计算机辅助建模、场景渲染等一系列过程,存在流程繁琐、学习成本高、不直观等问题。本系统基于虚拟现实(VR)手势交互技术,提出了一种新颖的虚拟园林景观布局系统,旨在提高园林景观设计的用户体验和效率。【方法】首先基于遥感卫星地图设计虚拟湿地景观场景,其次采用 Oculus Quest 2设备采集手部信息数据用于识别多种手势模式,并结合$P点云识别器设计动态手势分类算法匹配用户手势轨迹,实现了园林植物孤植、丛植、行植、片植及自由布置5种轨迹的精确识别。此外,本研究还设计了一套适用于虚拟场景的手势交互系统,以方便用户使用。【结果】本研究设计的系统采用Unity平台,使用C#脚本语言进行编程实现,最终实现了在虚拟场景中利用手势交互选取植物并构建园林景观的功能。通过对比实验,本系统在孤植模式下所需布局时间略高于键鼠操作,而在行植、丛植、片植与自由布置模式下所需布局时间均低于键鼠操作。【结论】本研究所设计系统生成的手势集直观、易于执行和记忆,能够很好地完成景观布置的任务。该系统可以为改善园林景观布局的交互方式和用户体验提供支持。

【Objective】Traditional garden landscape construction requires a series of processes such as hand-drawn plan drawings, computer-aided modeling, scene rendering, etc., which display the problems of cumbersome process, high learning cost, and lack of intuitiveness. Based on virtual reality (VR) gesture interaction technology, this system proposes a novel virtual garden landscape layout system, aiming to improve the user experience and efficiency of garden landscape design.【Method】Firstly, a virtual wetland landscape scene was designed based on remote sensing satellite maps, and secondly, the Oculus Quest 2 device was used to collect hand information for recognizing multiple gesture patterns, and combined with the $P point cloud recognizer to design dynamic gesture classification algorithms to match the user’s gesture trajectories which realized the accurate recognition of five trajectories of garden plants: solitary planting, clump planting, row planting, piece planting and free layout. In addition, this system also designed gesture interaction system suitable for virtual scenes to facilitate the use of users.【Result】The system designed in this research adopted the unity platform and used C# scripting language for programming implementation, and finally realized the function of using gesture interaction to select plants and construct a garden landscape in a virtual scene. Through comparative experiments, the layout time required for this system was slightly higher than that of keyboard and mouse operations in the solitary planting mode, and lower than those of the keyboard and mouse operation in the row planting, clump planting, piece planting and free arrangement modes.【Conclusion】The gesture set generated by this research design system is intuitive, easy to execute and memorize, and can well accomplish the task of landscape layout. The system can make a certain contribution to improving the interaction and user experience of landscape layout.