利用OpenGL实现内插算法可视化

OpenGL是一种交互式计算机图形系统,具有绘制三维图形的功能,能高效地编写出可操纵图形硬件的程序,支持三维可视化的实现。本文以OpenGL为基础,对可视化技术进行研究,重点讨论了内插算法,结合OpenGL中视点的定义,通过OpenGL的函数来实现。     

C语言绘制三维函数图像

函数的图形能形象、直观地描述一个函数的性质。一般二维函数的图形绘制非常方便，但是三维的函数图象绘制就大伤脑筋。在这里，我们将三维的函数图像在计算机中用C语言模拟平面输出。     

基于OpenGL的球体生成算法可视化仿真研究

研究计算机图像的三维可视化优化问题,针对图像生成慢的缺点,为了仿真计算机图形学中三维球体的生成过程,提高图像生成速度,提出了一种三角形分割的算法,实现了球体生成算法可视化的仿真系统CM.系统的实现,摒弃了原来可视化系统中依靠计算最佳逼近"像素点"的位置来显示图形的方法,而是用三角形面代替原来的"像素点",对其进行一系列的分割以实现最终效果.实验结果表明,方法可以实现三维图形生成算法可视化仿真效果,突破了原来只能实现二维图形的局限性,而且生成图形的速度较快,具有很好的逼真度.     

长白落叶松单木生长可视化系统设计与实现

虚拟树木近年来已成为植物学、农林业、环境科学和计算机领域的一个研究热点。论文以长白落叶松(Larixolgensis)为例,基于实测的部分形态结构参数和收集建立的生长模型,以OpenGL三维图形和建模库为三维可视化平台,采用MicrosoftVisualBasic6.0为计算机编程语言,完成了长白落叶松单木生长三维可视化系统(SimTree1.0)开发,实现了长白落叶松单木静态和动态三维图形模拟。     

基于OpenGL的小卫星在轨运行仿真系统研究

传统的航天工业仿真技术主要用于分析计算航天器的飞行轨道与姿态运动,这种仿真方式通常不支持三维可视化仿真功能;文章结合卫星轨道、姿态动力学和计算机图形学,设计基于三维实时动态显示技术的小卫星在轨运行仿真系统,对卫星轨道、姿态进行可视化仿真,实时动画演示星内敏感器的工作状态,提供图形曲线和文本形式的分析数据,并能与卫星地面站进行数据通讯,实现小卫星的在轨监测功能;仿真结果表明,仿真系统能正确实时接收地面站的数据,支持二维、三维动画输出,可以成功完成小卫星系统的仿真与监测功能.     

OpenGL在水下地形动态显示中的应用

系统采用三维图形开发工具OpenGL开发。分析了三维地形曲面的构造方法,给出了采用开发可视化系统的方法。所实现的程序是在VC＋＋6.0平台基础上,基于DEM数据,利用OpenGL提供的相关功能函数,实现了真实感水下地形的动态显示。     

车削轴类零件的轮廓轨迹提取与真实感显示

图形数据信息的可视化一直是计算机图形学与可视化领域研究的重点内容,图形数据的挖掘、提取与显示都需要借助计算机图形学的知识来完成;本研究重点探讨了计算机图形真实感处理技术在计算机辅助数控车削自动编程加工系统中的应用,通过运用计算机图形处理技术编程提取DXF轴类零件的轮廓轨迹曲线,采用曲面构造算法作数据处理,生成零件真实感所需的三维数据模型,结合OpenGL内容对三维数据模型进行实体渲染,交互实现了数据模型的光照、材质、雾化等功能,通过旋转、透视变换,零件设计者可真实地观测到零件内部结构,从整体上对所设计的零件结构进行直观的认识;实验结果表明所开发的图形真实感程序系统能够高效的实现车削轴类件的渲染效果,具有较高的轮廓数据提取效率和真实感渲染能力。     

用Origin 6.0绘制波函数立体图形

Origin6．0作为一个数学软件平台，具有数据管理与分析、二维及三维函数和离散数据绘图、程序开发等多种功能，广泛用于工程设计和科学研究。本文利用Origin6．0软件的三维函数绘图功能，绘制势箱波函数、氢原子轨道、及其电子云密度函数的立体图形、等值线图和等密度线图。详细给出了各类绘图函数的程序可读化形式、图形及操作过程。该绘图方法操作界面更友好，适用于一般化学化工过程中的三维解析函数可视化。     

油气地质建模综合技术研究进展

地质模型的三维可观化实现是油气勘探开发领域一个重要的技术环节。本文在综述三维地学可视化合技术的基础上，探讨了可视化实现过程中的三维地质格架模型建立、空间网格化方法、属性插值及计算机图形可视化关现技术等关键问题。并指出了地质模型三维可视化技术的发展趋势和研究思路。     

基于OpenGL的三维建模可视化软件开发

伴随着计算机图形学的发展,形成了可视化技术及其三维表现技术。可视化技术,即我们可以直接操作三维图形中的具有物体信息,与计算机直接交互;三维表现技术,即我们可以用它呈现出三维世界中的各种物体。目前在众多可视化工具中,表现突出的是SGI公司推出的OpenGL三维图形库,功能强大而且易于使用。本文是阐述如何用OpenGL进行三维建模,开发可视化软件。     

数据可视化在物流系统中的应用研究

数据可视化技术是通过计算机图形和图像处理技术,把数据转换成图形或者图像,在屏幕上显示出来。以达到清晰有效地传达与沟通信息的作用。简述了数据可视化的概念,阐述了数据可视化在物流系统中可行的技术架构,分析了数据可视化技术在物流系统中的应用现状和前景。     

立体可视化——新兴的灵境技术

立体可视化是９０年出现的可视化及计算机图形学的一个重要领域。立体可视化质变计算机图形学带来了一场革命,并在其众多的应用领域中取得了突破性进展,不仅容易实现图形演示的虚拟真实性（灵境）,而且可以将视野深入至复杂物体的内部世界,文语文介绍立体可视化技术的原理,立体数据的生成,处理及演示。     

Applying interactive colour graphics in traffic planning

This paper considers the need for, and application of, interactive colour graphics in the planning and management of road traffic systems. It considers the use of computer models of road traffic networks and the advantages of graphics in displaying the distribution of traffic and its impacts over a study area. Examples are given of the use of interactive colour graphics in the four stages of model application: data input, model operations, output displays, and analysis of output data. The examples are taken from the study of a “local area” traffic network, and a range of alternative traffic management plans proposed and implemented in that area. Interactive graphics provides transportation engineers with the means to merge their needs for computer-based methods and models with their desires to use and produce maps and diagrams as a principal means of communication.     

一个基于认知特性的数据可视化3D模型的研究

随着计算机系统中信息规模的增大,有限的屏幕尺寸已不能满足大信息量显示的需求。针对这个问题,提出了一种全新“不倒翁”模型。该3D数据可视化模型基于对计算机图形图像学、心理学和认知学理论的研究,创造性地利用了“鱼眼视图”的优势和人们的空间认知特点,具有很强的交互性和易用性,使得用户能在“小屏幕”上方便地进行“大信息”的浏览和检索。实验结果表明它起到了预期的效果。     

Modeling deformable surfaces with level sets

This article describes how to use level sets to represent and compute deformable surfaces. A deformable surface is a sequence of surface models obtained by taking an initial model and incrementally modifying its shape. Typically, we can parameterize the deformation over time, and thus we can imagine that a surface moves or flows under the influence of a vector field. The surface flow, v, can be determined as a function of spatial position (and time), or it can depend on the shape of the surface itself. The latter is called a geometric flow. Deformable surfaces have been used to solve a variety of problems in image processing, computer vision, visualization, and graphics. In graphics, for instance, deformable surface models have been used to form sequences of shapes that animate the morphing of one object into another. They have also been used to denoise or smooth surface models derived from a set of noisy 3D measurements.     

The Art of Knitted Fabrics, Realistic & Physically Based Modelling of Knitted Patterns

In this paper we will present a system to use three dimensional computer graphics in garment design. This system is capable to visualize the "real", i.e. the physically correct, appearance of a knitted fabric. A fast visualization of a physically correct micro-structure garment is of crucial importance in textile industry, since it enables fast and less expensive product development. This system may be either used in the design of new products or teaching the art of knitted fabrics.
We use in our system directly the produced machine-code of the design system for knitting machines. A physical model, a particle system, is used to calculate the dynamics of the micro-structure of the knitted garment.     

Computer games' influence on scientific and information visualization

The breakneck pace of consumer graphics development has yielded an unexpected dividend: using commodity graphics boards in high-end scientific applications. Historically, the visualization community has been a driving force in high-end computer graphics innovation, fostering technologies that have gradually filtered down to the consumer market. In recent years, however, the financial growth of the computer games market has made it the driving force in the development of consumer graphics applications and hardware. While scientific and information visualization focus on knowledge, computer games focus on play. Thus, the type of play a game depicts strongly affects the graphics it requires. Popular game environments span many classifications, including fast-paced first-person shooting games, massively multiplayer roleplaying games, computer translations of classic board games like chess and backgammon, and construction simulations that let players create a city or even an entire world. Regardless of their differences, each game type facilitates the development of visual thinking concepts. Thinking visually in three dimensions, benefits the sense of wonder and user interaction connected with the application of scientific and information visualization technologies.     

Internetworked graphics and the Web

Although the networking and computer graphics fields are considered to be distinct disciplines, they must begin to converge in order to support collaborative exploration and information visualization on the Internet and the World Wide Web. Telecommunication breakthroughs remove bottlenecks and provide new opportunities for interactive 3D graphics across globally interconnected, dissimilar networks. Multicast backbone tools, developed in the networking arena, provide desktop videoconferencing tools for sharing information visualization and virtual reality explorations. The Virtual Reality Modeling Language (VRML), developed in the computer graphics arena, supports the 3D display and fly-through of networked computing resources on the Internet. The computer graphics community considers VRML to be an interactive tool for exploring content on the Web. The telecommunications community calls it an application on the networking infrastructure. The authors define the concept of internetworked graphics to describe the future merger and dependencies of computer graphics applications and the telecommunications networking infrastructure     

VTK医学图像三维重建应用及实现

VTK是开放源码的自由软件系统,可应用于图像处理、计算机图形学和科学计算可视化,在国内外被广泛用于各行各业.介绍了VTK的基本组成、系统架构、可视化流程.并且将VTK 应用于医学图像可视化,使用面绘制的移动立方体法和体绘制的光线投影法,在Microsoft Visual Studio 2005下使用C++语言分别实现了...