Java3D虚拟室内装饰效果展示研究

目前虚拟现实的建模方法主要采用OpenGL,VRML等语言进行编程,这存在着难以掌握、不易广泛推广等缺点。而Java3D作为一种新兴的三维开发应用程序接口,则提供了高效的开发性能。结合实际应用中的实现方法和步骤,对使用Java3D构建虚拟环境,丰富三维表现效果,实现环境与用户的交互等进行了研究,并给出在Java3D场景中实现虚拟场景漫游的方法。     

虚拟现实技术在网络三维课件中的应用研究

重点开发了太阳系的演示系统。研究了网络多媒体课件中三维课件的制作技术与开发。探讨了如何利用Java 3D技术在应用程序中建立三维场景、三维几何形体以及设计添加交互功能。最后指出了虚拟现实技术与网络三维课件开发的结合有着广阔的应用前景。     

从Sloodle看三维虚拟学习环境的发展趋势

当前教育领域涌现了很多使用基于网络的多用户虚拟环境进行教学的实例,如Active Worlds、Second Life、Wonderland等,这些平台有很好的三维模拟环境,在教学中使用得越来越广泛,但缺乏学习过程记录与支持的功能,有必要将其与现有的教学系统尤其是基于Web的虚拟学习系统整合起来。本文首先简要回顾了教育领域中三维虚拟学习环境的研究现状,然后介绍了当前国际上流行的一个开源三维虚拟学习环境——Sloodle。通过介绍Sloodle中的Web-Intercom、MetaGloss、Choicer、Translator等工具,讨论了使用这种三维虚拟环境与Web技术整合给学习系统带来的挑战和潜力。最后,总结并探讨了三维虚拟学习环境的发展趋势。     

Immersive Anatomy Atlas: Learning Factual Medical Knowledge in a Virtual Reality Environment

In order to improve learning efficiency and memory retention in medical teaching, furthering active learning seems to be an effective alternative to classical teaching. One option to make active exploration of the subject matter possible is the use of virtual reality (VR) technology. The authors developed an immersive anatomy atlas which allows users to explore human anatomical structures interactively through virtual dissection. Thirty-two senior-class students from two German high schools with no prior formal medical training were separated into two groups and tasked with answering an anatomical questionnaire. One group used traditional anatomical textbooks and the other used the immersive virtual reality atlas. The time needed to answer the questions was measured. Several weeks later, the participants answered a similar questionnaire with different anatomical questions in order to test memory retention. The VR group took significantly less time to answer the questionnaire, and participants from the VR group had significantly better results over both tests. Based on the results of this study, VR learning seems to be more efficient and to have better long-term effects for the study of anatomy. The reason for that could lie in the VR environment's high immersion, and the possibility to freely and interactively explore a realistic representation of human anatomy. Immersive VR technology offers many possibilities for medical teaching and training, especially as a support for cadaver dissection courses.     

Transforming clinical imaging data for virtual reality learning objects

Advances in anatomical informatics, three‐dimensional (3D) modeling, and virtual reality (VR) methods have made computer‐based structural visualization a practical tool for education. In this article, the authors describe streamlined methods for producing VR “learning objects,” standardized interactive software modules for anatomical sciences education, from newer high‐resolution clinical imaging systems data. The key program is OsiriX, a free radiological image processing workstation software capable of directly reformatting and rendering volumetric 3D images. The transformed image arrays are then directly loaded into a commercial VR program to produce a variety of learning objects. Multiple types or “dimensions” of anatomical information can be embedded in these objects to provide different kinds of functions, including interactive atlases, examination questions, and complex, multistructure presentations. The use of clinical imaging data and workstation software speeds up the production of VR simulations, compared with reconstruction‐based modeling from segmented cadaver cross‐sections, while providing useful examples of normal structural variation and pathological anatomy. Anat Sci Ed 1:50–55, 2008. © 2008 American Association of Anatomists.     

一种基于虚拟现实的气象灾害逃生演练系统构建

随着虚拟现实技术的发展,模拟真实的气象灾害成为可能。基于虚拟现实技术,构建气象灾害逃生演练系统,通过逼真的气象灾害场景训练,不仅可以提高体验者的兴趣,还能增强其临场感以及面对气象灾害的应急处理及逃生能力。利用计算机设备构建生动逼真的虚拟环境,让体验者拥有身临其境之感,使他们能更方便、更直接地融入虚拟空间,并通过语言、手势、感官等与计算机进行实时交互。与传统逃生演练方式相比,基于虚拟现实技术的气象灾害逃生演练系统优势明显,具有广阔应用空间。     

基于Cult3D的数码摄像机使用介绍系统设计与实现

通过虚拟现实构建软件实现摄像机展示系统的完整过程,详细描述在三维建模软件中建立摄像机模型,在Cult3D实现虚拟环境下摄像机的虚拟操作,并探讨了3D MAX与Cult3D的接口,以及Cult3D文件进行网络发布的问题。     

Dual‐extrusion 3D printing of anatomical models for education

Two material 3D printing is becoming increasingly popular, inexpensive and accessible. In this paper, freely available printable files and dual extrusion fused deposition modelling were combined to create a number of functional anatomical models. To represent muscle and bone FilaFlex^3D flexible filament and polylactic acid (PLA) filament were extruded respectively via a single 0.4 mm nozzle using a Big Builder printer. For each filament, cubes (5 mm³) were printed and analyzed for X, Y, and Z accuracy. The PLA printed cubes resulted in errors averaging just 1.2% across all directions but for FilaFlex^3D printed cubes the errors were statistically significantly greater (average of 3.2%). As an exemplar, a focus was placed on the muscles, bones and cartilage of upper airway and neck. The resulting single prints combined flexible and hard structures. A single print model of the vocal cords was constructed which permitted movement of the arytenoids on the cricoid cartilage and served to illustrate the action of intrinsic laryngeal muscles. As University libraries become increasingly engaged in offering inexpensive 3D printing services it may soon become common place for both student and educator to access websites, download free models or 3D body parts and only pay the costs of print consumables. Novel models can be manufactured as dissectible, functional multi‐layered units and offer rich possibilities for sectional and/or reduced anatomy. This approach can liberate the anatomist from constraints of inflexible hard models or plastinated specimens and engage in the design of class specific models of the future. Anat Sci Educ 11: 65–72. © 2017 American Association of Anatomists.     

网络三维虚拟实验系统的设计与实现

根据虚拟现实技术特性,结合代表性的案例,分析网络三维虚拟实验系统的基本构成框架。依据虚拟实验系统的开发流程,以化学虚拟实验《实验室制取气体》的开发为例,介绍了基于Virtools开发网络三维虚拟实验系统的方法和过程。最后,对网络三维虚拟实验系统的开发应用进行了总结与展望。     

Unity3D下构件化虚拟仪器功能实现方法

三维虚拟现实漫游仿真和虚拟仪器实验过程仿真是目前两种主要仿真手段,前者能够很好地模拟真实实验场景,后者则能更好地仿真实验细节。为了解决传统虚拟实验交互性弱、开发周期长等问题,提出了一种Unity3D下的构件化虚拟仪器功能实现方法。首先在Unity3D平台上开发多种标准化、可复用的虚拟仪器;然后将虚拟仪器引入虚拟现实场景中,并通过基于事件中心的观察者模式实现虚拟仪器的通信和数据流动;最后,依据构建的虚拟仪器开展典型机械工程测量实验。结果表明,与传统虚拟实验相比,该方法具有更好的真实性、交互性,同时构件化的思想缩短了开发周期。     

Maximizing modern distribution of complex anatomical spatial information: 3D reconstruction and rapid prototype production of anatomical corrosion casts of human specimens

Anatomical corrosion casts of human specimens are useful teaching aids. However, their use is limited due to ethical dilemmas associated with their production, their lack of perfect reproducibility, and their consumption of original specimens in the process of casting. In this study, new approaches with modern distribution of complex anatomical spatial information were explored to overcome these limitations through the digitalization of anatomical casts of human specimens through three‐dimensional (3D) reconstruction, rapid prototype production, and Web‐based 3D atlas construction. The corrosion cast of a lung, along with its associated arteries, veins, trachea, and bronchial tree was CT‐scanned, and the data was then processed by Mimics software. Data from the lung casts were then reconstructed into 3D models using a hybrid method, utilizing both “image threshold” and “region growing.” The fine structures of the bronchial tree, arterial, and venous network of the lung were clearly displayed and demonstrated their distinct relationships. The multiple divisions of bronchi and bronchopulmonary segments were identified. The 3D models were then uploaded into a rapid prototype 3D printer to physically duplicate the cast. The physically duplicated model of the lung was rescanned by CT and reconstructed to detect its production accuracy. Gross observation and accuracy detection were used to evaluate the duplication and few differences were found. Finally, Virtual Reality Modeling Language (VRML) was used to edit the 3D casting models to construct a Web‐based 3D atlas accessible through Internet Explorer with 3D display and annotation functions. Anat Sci Educ. © 2012 American Association of Anatomists.     

基于Web3D的虚拟实验教学平台

以SpiderGL项目为基础,构建了一个无需插件安装的、具有Web3D交互能力的三维虚拟实验教学平台。该平台能给用户提供强烈的沉浸感,并具有良好的双向交互性、可扩展性以及安全可靠性。     

虚拟现实文化体验系统设计与应用

近年来,虚拟现实技术作为一种新媒体技术,受到众多研究机构的关注与青睐,应用文化领域的虚拟现实技术也成为研究热点。以Unity3D为开发平台,构建一种虚拟现实文化体验系统,并重点分析其系统架构与关键技术。以黄鹤楼文化为实例设计并实现了基于虚拟现实的黄鹤楼文化体验系统,对系统各模块进行分析与测试,结果表明其稳定性比传统系统更高。相比传统虚拟现实结合文化的应用,该系统增加了虚拟现实交互体验,为进一步推进大众对虚拟现实技术的认知、推动虚拟现实技术在数字文化领域的交互体验提供了案例参照。     

基于虚拟现实的天体系统模型设计与应用

提出用3Ds max软件设计天体系统三维模型、用Cult 3D软件为模型添加旋转和移动等交互功能、在Flash软件中完成二维动态光影效果、在网页中通过JavaScript语言实现其交互的三维虚拟系统设计思想;以演示日食、月食的成因及天体运行的相关知识为例,设计创作太阳系三维虚拟场景,其中三维虚拟模型可与Flash对象交互,相关动态光影效果可同步显示;同时,介绍该实例可实现的各项教学功能与特点,探究虚拟现实技术引入教学的应用前景。     

基于Unity3D的图书馆虚拟阅读系统

高校图书馆拥有非常丰富的实体图书资源,一般仅面向本校师生开放,由此出现资源利用率低、分配不均等问题。为解决上述问题,提出一种基于Unity3D的图书馆虚拟阅读系统,通过Unity3D软件进行环境模拟和搭建,再使用C#语言实现人机交互,将虚拟阅读和虚拟漫游相结合,实现在虚拟环境中行走与阅读。实验表明,该系统可让用户沉浸在虚拟环境中学习和阅读,能够满足大众阅读需求。     

基于智能多Agent的虚拟现实技术研究

通过对虚拟现实和智能多Agent技术的研究,提出了基于智能多Agent的虚拟现实技术模型,解决了灵境中虚拟人的智能实现、通信机制等问题,为今后进行远程教学、虚拟实验、仿真研究奠定了理论基础。     

Construct3D: A Virtual Reality Application for Mathematics and Geometry Education

Construct3D is a three dimensional geometric construction tool based on the collaborative augmented reality system Studierstube. Our setup uses a stereoscopic head mounted display (HMD) and the Personal Interaction Panel (PIP) - a two-handed 3D interaction tool that simplifies 3D model interaction. Means of application in mathematics and geometry education at high school as well as university level are being discussed. A pilot study summarizes the strengths and possible extensions of our system. Anecdotal evidence supports our claim that the use of Construct3D is easy to learn and encourages experimentation with geometric constructions.     

基于Java3D的网络虚拟实验的开发

Java3D是一种新的三维构建技术,它应用于网络虚拟实验的开发可极大提高实验的仿真效果和交互能力。在大学物理虚拟实验的开发实践中总结了基于Java3D开发虚拟实验的一般流程和常见疑难处理方法,以离心节速器实验为例描述了具体的应用开发过程,提出了开发三维虚拟实验的极具可操作性方案。     

3ds Max中低多边形模型的创建方法研究

在三维游戏与虚拟现实等交互式的三维应用环境中,为了保证程序的流畅运行,其三维建模方式一般采用低多边形模型的方式。介绍了三维模型的分类,探讨了3ds Max中低多边形模型的创建方法,介绍了几种常用的优化模型面数的方法,对于实际工作具有较强的指导意义。     

基于虚似现实的三维场景建模的可视化实现

本文从虚拟现实的角度，运用OpenGL技术以三维图形建模予以探讨，给出了类的设计，并应用该理论实现了三维虚拟场景的可视化。