Particle system based on GPU to simulate rain and snow is widely used in virtual scene simulation for its high efficiency.
在虚拟场景中采用基于GPU的粒子系统来模拟雨雪，因其效率较高，得到了广泛的应用。
To remove the limitations of traditional scene graph structure in development of virtual maintenance training system(VMTS), a new scene graph structure is presented.
针对传统场景图结构在开发虚拟维修训练系统时的局限性，提出了一种新的场景图数据结构。
A roaming system of chemical scene was introduced, which took producing locales of some chemical factory as model and developed by use of virtual reality technique.
以某化工企业的生产现场为模型，应用虚拟现实技术，建立了一套化工场景漫游系统。
The article presents virtual scene building technology based on wavelet transform, and implements a real-time roaming system for cylinder, cubic and sphere panorama.
文章介绍了基于小波变换的虚拟场景构造技术，并实现了一个对柱面全景图、立方体全景图和球面全景图的实时漫游系统。
The virtual city system facing the urban conception design can preview the configuration character with realistic virtual scene, which can help the urban designer estimate the design ideology.
以四川资阳场景为试验区域，设计了支持城市概念设计的虚拟城市系统，并构建了虚拟城市景观模型库。
D real scene of CAM shaft grinding process system is a basic function unit of the CAM shaft virtual reality grinding system in our research.
凸轮轴磨削工艺系统三维实景是本研究中凸轮轴虚拟磨削加工系统的基础功能单元。
In distributed simulation system, one node connects with the others through message. In many simulation systems, 3d terrain virtual scene takes part in the whole process as a very important part.
分布式仿真系统中，各节点之间通过消息互相交流信息，3维地形虚拟场景通常在大量的仿真系统中作为重要的对象参与仿真。
Therefore, an effective scene graph data representation of virtual maintenance training system is presented in this paper.
该文针对虚拟维修操作的特点，提出了一种新的场景图数据结构。
Finally, a running machine fitness system with a virtual scene is implemented.
最终以跑步机为研究对象，实现了具有虚拟场景的跑步机健身系统。
Based on 3d ir scene, a virtual ir imaging guiding system model is established.
建立了基于三维场景的红外成像制导系统虚拟样机。
The thesis studies the VR modeling techniques of virtual scene and 3D sound according to the development of Visual Vehicle Simulation System.
论文结合汽车驾驶模拟器视景系统的开发，对虚拟场景中的几何建模技术、声音建模技术进行了研究。
The convenient multi-viewpoints observation choice is provided in the system for the user, thus the requirement of roaming virtual reality scene to the different Angle and way is satisfied.
并为用户提供了方便的多视点的观察选择，满足了用户对不同角度和方式下的虚拟现实视景漫游要求。
The rendering of 3D terrain scene is playing a key role in many research fields such as virtual reality, geographic information system and simulation system, etc.
三维地形场景实时绘制在虚拟现实、地理信息系统、仿真系统等领域中占有十分重要的地位。
According to the whole design, a flight training scene system is developed through three steps: three-dimensional modeling, virtual scene configuration and virtual scene real-time drive.
通过三维建模、虚拟场景配置、虚拟场景实时驱动三个步骤对视景系统进行实现，开发出一套适用于多机空战战法训练的飞行视景仿真系统。
An important feature of real-time visualization system is that the user can interact with the system to control the display of the virtual scene.
实时可视化系统的一个重要特点就是用户可以交互控制视图的显示。
For designing a virtual reality system, the crucial problem is how to create realistic environment, which contains 3d virtual scene, stereo and so on, besides related hardware equipment.
设计一个虚拟现实系统除了必须具备相关的硬件设备外，关键的问题是如何构建一个逼真的虚拟环境，这个环境包括三维的虚拟场景、立体声等等。
By evaluating the result blended video, the designer can estimate and optimize the layout of virtual scene intuitively, and eliminate the inaccuracy during the planning process through this system.
该系统的实现，为雕塑与环境的整体设计规划提供了直观的形象化显示，有助于雕塑作品的构思、方案选择和整体效果的预览。
A typical VR system can realize simulation of real scene in which visitors inaccessible to the real site can enter a virtual environment and interact with it.
典型的虚拟现实系统可以实现实景仿真，让无法到实地参观的人走入虚拟环境，并与虚拟环境产生交互。
Management of complex three-dimensional scene is the basis of3 DGIS, three-dimensional landscape system and virtual reality.
三维复杂场景管理是三维地理信息系统、三维景观系统、拟现实的基础和核心。
And applied the subsystem to the interactive feedback modules of the main part of the system, effectively enhanced the efficiency of the system in virtual scene.
最后，把该子系统应用到虚拟移动电话系统主体部分的交互反馈模块中，有效地提高了移动电话设计效率。
In the embedding step, four points are specified to build the world coordinate system so that the virtual objects are superimposed on the real scene images in the proper positions.
在嵌入阶段，我们指定了四个点来建立世界坐标系，以确保虚拟物体能够成功叠加到真实场景中的正确位置。
Users of an AR system can observe the real scene augmented with computer-generated text, graphics or 3d models of virtual objects.
AR系统的用户可以在看到真实环境的同时看到计算机产生的与之融合的文字、图片或虚拟物体的三维模型。
The thesis used the Virtual Scene View technology to accomplish the visualization of the process of the experiment control system.
详细介绍了虚拟视景的设计和实现，包括场景模型和飞机模型的建模方法、气候环境的渲染技术、多窗口显示的实现等。
Through simple modeling, multiple mapping ways and import 3d model to describe large-scale indoor environment, this paper presents a practical, real-time virtual scene construction system.
本系统通过简单的建模、多种贴图方式以及导入3d模型来近似地描述大型环境，具有较强的实用性、较好的实时性和显示效果。
Through simple modeling, multiple mapping ways and import 3d model to describe large-scale indoor environment, this paper presents a practical, real-time virtual scene construction system.
本系统通过简单的建模、多种贴图方式以及导入3d模型来近似地描述大型环境，具有较强的实用性、较好的实时性和显示效果。
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