With the development of 3D measurement systems, dense colored point clouds are increasingly available. However, up to now, their use in interactive applications has been restricted by the lack of support for point clouds in game engines. In addition, many of the existing applications for point clouds lack the capacity for fluent user interaction and application development. In this paper, we present the development and architecture of a game engine extension facilitating the interactive visualization of dense point clouds. The extension allows the development of game engine applications where users edit and interact with point clouds. To demonstrate the capabilities of the developed extension, a virtual reality head-mounted display is used and the rendering performance is evaluated. The result shows that the developed tools are sufficient for supporting real-time 3D visualization and interaction. Several promising use cases can be envisioned, including both the use of point clouds as 3D assets in interactive applications and leveraging the game engine point clouds in geomatics.

随着3D测量系统的发展，密集的彩色点云越来越多。但是，到目前为止，由于缺乏对游戏引擎中点云的支持，限制了它们在交互式应用程序中的使用。此外，许多现有的点云应用程序都缺乏流畅的用户交互和应用程序开发能力。在本文中，我们介绍了游戏引擎扩展的开发和体系结构，该扩展促进了密集点云的交互式可视化。该扩展允许开发游戏引擎应用程序，用户可以在其中编辑点云并与点云进行交互。为了演示所开发扩展的功能，使用了虚拟现实头戴式显示器并评估了渲染性能。结果表明，开发的工具足以支持实时3D可视化和交互。可以设想一些有前途的用例，包括在交互式应用程序中将点云用作3D资产以及在地理信息系统中利用游戏引擎点云。