动态三维树实时仿真设计与实现

Design and realization of 3D dynamic tree simulation

简要介绍了国内树木仿真技术的发展现状,介绍了几种常用仿真树型的建模方法,并对他们的特点进行了比较分析。详细介绍了基于SpeedTree几何与图像混合绘制技术的动态三维树木的建模、渲染设计及与3D引擎衔接的方案,并给出了仿真实验数据。当虚拟视景当前视口内树木总量不大于130棵时,视景帧更新率保持30帧/秒以上,能够满足系统实时性要求。动态三维树技术在实时视景仿真系统中的成功应用,大大增强了虚拟战场环境的真实感和训练人员的沉浸感,使虚拟训练更加趋于真实,提高了训练效果。

The present development of tree simulation technology is introduced. A few commonly used tree simulation module building methods is explained and their characteristics is compared. The dynamic three-dimension tree module building is introduced in detail using geometry and image mixture technology on basis of SpeedTree, rendering design and 3D engine link formula. Simulation experiment data is given. When the total tree number in the virtual scene window doesn＇t exceed 130, frame of visual scene update average keeps more than 30 frame/s and can meet the system＇s realtime need. The successful application of dynamic three-dimension tree technology in the real-time image simulation system further reinforces the realness of virtual war environment and the absorption of the trainees which makes the training more real and improves the training results.