Stands for "Virtual Reality Modeling Language."

The OpenSceneGraph is an open source high performance 3D graphics toolkit, used by application developers in fields such as visual simulation, games, virtual reality, scientific visualization and modelling. Written entirely in Standard C++ and OpenGL

讨论了在PC机上实现无人机虚拟现实仿真的系统结构、实现平台、模型和仿真数据库的组织实现方法。讨论了图形仿真各个子模块 的实现方法，并解决了无人机模型的位姿自动校准问题。-Discusses the implementation of the system structure UAV virtual reality simulation on the PC, to achieve organizational platform, modeling and simulation impleme

Augmented Reality(AR) is an area of research that aims to enhance the real world by overlaying computer-generated data on top of it. Azuma [Azu97] identifies three key characteristics of AR systems: (1) mixing virtual images with the real world,