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地形实时绘制
相关语句
  real-time terrain rendering
     A View-Dependent Multiresolution Real-Time Terrain Rendering Method
     一种视点相关的多分辨率地形实时绘制方法
短句来源
     Real-time terrain rendering and interactive visualization is the crucial problem concerning the virtual reality,GIS,computer graphics and the visualization of scientific computation.
     地形实时绘制和交互式可视化是虚拟现实、地理信息系统、计算机图形学、科学计算可视化等技术的关键问题。
短句来源
  “地形实时绘制”译为未确定词的双语例句
     Multiresolution Model and Its Application to Real-time Rendering of Terrain
     多分辨率模型与地形实时绘制
短句来源
     Design and implementation of collision detection during the rendering of high fidelity dynamic terrain
     高逼真动态地形实时绘制中碰撞检测的设计与实现
短句来源
     This paper proposes a real-time dynamic culling method in terrain visualization based on LOD technology.
     讨论了地形绘制中可视区裁剪技术及基本原理,提出一种地形实时绘制中基于LOD技术的可视区裁剪方法。
短句来源
     In rendering time, the choosing of LOD is driven by screen space error.
     地形实时绘制时LOD数据的选择是基于屏幕误差的。
短句来源
     Hybrid LOD was proposed and a framework for distributed terrains was presented.
     在此基础上提出了混合LOD算法,并给出了分布式海量地形实时绘制的框架.
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  相似匹配句对
     A Survey of Real-time Terrain Rendering Algorithms
     实时地形绘制算法综述
短句来源
     A Simple and Efficient Algorithm for Real-Time Rendering of Large Scale Terrain
     大规模地形实时绘制算法
短句来源
     Study on Real-Time Terrain Rendering
     实时地形绘制算法研究
短句来源
     Research on Real-Time Rendering for Large Scale Terrain
     大规模地形实时绘制的算法研究
短句来源
     The Real-time Rendering and Walkthrou gh of 3D Terrain
     三维地形实时绘制与漫游
短句来源
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  real-time terrain rendering
Therefore we adopt the sort-first and retain-mode parallel rendering architecture for our real-time terrain rendering.
      


The techniques of real time generation of terrain were investigated. The algorithm adopted continuous level of detail for fast rendering, and dynamically generated terrain meshes according to the roughness of terrain and information of the viewpoint. By using view angle based error metrics, it transformed the screen projection of static error into the view angle with respect to the viewpoint. The algorithm acquired constant frame rates by searching the hierachical quadtree in a topdown manner. The rendering...

The techniques of real time generation of terrain were investigated. The algorithm adopted continuous level of detail for fast rendering, and dynamically generated terrain meshes according to the roughness of terrain and information of the viewpoint. By using view angle based error metrics, it transformed the screen projection of static error into the view angle with respect to the viewpoint. The algorithm acquired constant frame rates by searching the hierachical quadtree in a topdown manner. The rendering speed was also benefited from the coherence of frames and triangle fans. The experimental results show its high efficiency. The view angle based error metrics and the hierarchy of quadtree reduce the calculations in real time rendering, so it accelerates the rendering speed efficiently.

研究地形实时生成技术 .采用连续细节层次快速绘制技术 ,按照地形的局部起伏程度和用户视点信息动态确定绘制时的地形网格 .算法采用基于视角的误差度量方法 ,将静态误差在屏幕上的投影转换为该误差相对于视点的夹角 .采用自顶向下搜索层次四叉树的方法以获得恒定的帧频 ,并利用相邻帧之间的连续性和三角形扇形结构提高地形的实时绘制速度 .实验结果证明了算法的有效性 .基于视角的误差度量方法和层次四叉树结构可以有效减少实时绘制时的计算量 ,提高绘制速度

The real displaying technology of 3D topography is a key technology for Virtual Reality (VR), but also is a important element of Geography Information System. In this paper, we discussed the mechanism and procedure of real displaying of 3D topography. Moreover, we also discussed the main two methods of drawing and displaying of it. At the same time, a specific example of drawing the 3D topography using the previously method is given.

地形的三维实时显示技术是虚拟现实(VR)的一项关键技术,也是地理信息系统(GIS)的重要组成部分。本文探讨了在OpenGL环境下三维地形实时绘制显示的机制及过程。在此基础上,给出了三维数字地形交互显示的两种主要方式及实现方法。并给出了具体的绘制实例。

It is well known that the topography is the most complicated object in nature. With the development of GIS technology, the 3D rendering of topography is becoming one of the most important research areas today because the 3D digital topography is a very important part of GIS. At the same time, 3D digital topography is also a key technology of VR(Virtual Reality). However, it is a difficult task to bring this key technology into effect because large quantities of data have to be coped with. These data mainly...

It is well known that the topography is the most complicated object in nature. With the development of GIS technology, the 3D rendering of topography is becoming one of the most important research areas today because the 3D digital topography is a very important part of GIS. At the same time, 3D digital topography is also a key technology of VR(Virtual Reality). However, it is a difficult task to bring this key technology into effect because large quantities of data have to be coped with. These data mainly include data of topography and data of topographic surface features. There is no doubt that creating a real-time, interactive, vivid topographic environment using these spatial geographic data in computer is a very complicated work. Fortunately, with the development of computer technology, we can easily draw it in common computer with OpenGL. In this paper, we briefly discussed the technology of drawing 3D graphics and the solid view of digital topography as well as the mechanism and procedure of real displaying of 3D topography. Using this technology, we can easily render a 3D digital topography in a common computer. We also discussed two methods of realizing the dynamic view of topography, one is the viewpoint fixing with object-point moving. In fact, in many cases, in order to better understand the topography, we need to observe the 3D digital model along a selected routing. So we can use another method of dynamic view, that is object-point fixing with viewpoint moving. A specific example of drawing the 3D digital topography using the previously method is given.

地形是自然界的复杂形体,地形三维显示技术是地理信息系统(GIS)的重要研究领域及其组成部分。同时,地形的三维实时显示也是虚拟现实(VR)的一项关键技术,而虚拟地形环境面临的是巨量地形数据和地面特征数据。利用这些地理空间数据建立一个逼真、实时、可交互的地形环境是一项复杂的工作。本文介绍了OpenGL的特点及OpenGL图形绘制的基本技术在OpenGL环境下,三维地形实时绘制显示的机制及一般过程。探讨了OpenGL立体图形动态显示的两种主要方式,即:视点固定目标移动和目标固定视点移动。同时给出了具体的绘制实例。

 
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