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Hybrid image-based collision detection in java 3d

SOFTWARE-PRACTICE & EXPERIENCE 2007年第9期37卷 963-982页

作者： Xiao, Gaoyu Aziz, Aamer Nowinski, Wieslaw L. Nanyang Technol Univ Comp Integrated Med Intervent Lab Singapore 639798 Singapore Agcy Sci Technol & Res Singapore Bioimaging Consortium Singapore 138671 Singapore

Collision detection is highly important in computer graphics and virtual reality. Most collision detection methods are object-based, relying on testing the geometrical interference of objects, and their performance therefore depends on the geometrical complexity of the objects. Recently, image-based methods have gained increasing acceptance for their simplicity in implementation, robustness with respect to the object geometry, and the potential to distribute the computational burden onto graphics hardware. However, all existing image-based methods require direct calls to OpenGL, but so far there is no direct way to access OpenGL through the java 3d API. Although java 3d provides its own built-in collision detection classes, they are either incorrect or inefficient. In this paper, we present a hybrid image-based collision detection method in java 31), which incorporates the java 3d built-in collision detection and the image-based collision detection in our specially devised scene graph. In addition, we take advantage of the fact that the 3d position of successive offscreen views (i.e. virtual views perceived by the probing object) does not change significantly and thereby reduce the occurrences of offscreen rendering, so that the collision detection becomes even faster (up to 50% in our case). Experimental results prove the correctness and efficiency of our method. Copyright (C) 2006 John Wiley & Sons, Ltd.

关键词： collision detection hybrid image-based java 3d temporal coherence

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Generating contours on FEM/BEM higher-order surfaces using java 3d textures

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AdVANCES IN ENGINEERING SOFTWARE 2003年第8期34卷 469-476页

作者： Nikishkov, GP Univ Aizu Aizu Wakamatsu Fukushima 9658580 Japan

An efficient technique to visualize primary and secondary results for combined finite element method/boundary element method models as contours is presented. The technique is based on dividing higher-order surfaces into triangles and on using texture interpolation to produce contour plots. Since results of high accuracy with significant gradients can be obtained using sparse meshes of boundary elements and finite elements, special attention is devoted to element face subdivision. Subdivision density is defined on the basis of both face edge curvature and ranges of result fields over element faces, java 3d API is employed for code development. (C) 2003 Elsevier Science Ltd. All rights reserved.

关键词： finite element method boundary element method visualization contours java 3d

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Three Order Bezier Surface and Racing Car Conception Model design using java 3d

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International Conference on Information Technology for Manufacturing Systems (ITMS 2011)

作者： Gao Xinrui Zhang Yongchuan Hainan Univ Informat Sci Technol Inst Haikou 570228 Peoples R China

ISBN: (纸本)9783037851494

By using Bezier surface matrix formula and Bezier surface control points and through merging different Bezier surfaces, the car model was produced. By using texture and transparence and other functions of java 3d, the tyres and the wind screen of the car and the exhibition platform were designed. By defining the moving and rotation actions, the motions of the car model were designed. All functions were implemented by java and java 3d.

关键词： Bezier surface Racing car model java 3d

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Spilling the beans on java 3d: A tool for the virtual anatomist

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The Anatomical Record 2002年第2期257卷 73-79页

作者： Geoffrey d. Guttmann Department of Anatomy and Cell Biology College of Medicine University of Saskatchewan A-315 Health Sciences Building 107 Wiggins Road Saskatoon SK S7N 5E5 Canada. Fax: 306–966–4298 Dr. Guttmann is an Assistant Professor in the Department of Anatomy and Cell Biology College of Medicine University of Saskatchewan. He received his Ph.D. in Medical Physics from the University of California Berkeley and did post-doctoral fellowships at Los Alamos National Laboratory and University of Michigan. His interests are the development of computer-aided learning programs for anatomy and 4-D reconstruction of embryonic craniofacial development.

The computing world has just provided the anatomist with another tool: java 3d, within the java 2 platform. On december 9, 1998, Sun Microsystems released java 2. java 3d classes are now included in the jar (java Archive) archives of the extensions directory of java 2. java 3d is also a part of the java Media Suite of APIs (Application Programming Interfaces). But what is java? How does java 3d work? How do you view java 3d objects? A brief introduction to the concepts of java and object-oriented programming is provided. Also, there is a short description of the tools of java 3d and of the java 3d viewer. Thus, the virtual anatomist has another set of computer tools to use for modeling various aspects of anatomy, such as embryological development. Also, the virtual anatomist will be able to assist the surgeon with virtual surgery using the tools found in java 3d. java 3d will be able to fulfill gaps, such as the lack of platform independence, interactivity, and manipulability of 3d images, currently existing in many anatomical computer-aided learning programs. Anat. Rec. (New Anat.): 257:73–79, 1999. © 1998 Wiley-Liss, Inc.

关键词： java 3d virtual anatomy computer-aided learning 3d images development embryology education

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Bezier Surfaces and Texture Mapping Using java 3d

Bezier Surfaces and Texture Mapping Using Java 3D

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2012 3rd International Conference on Information Technology for Manufacturing Systems(ITMS 2012)

作者： Xinrui Gao Information Science Technology Institute of Hainan University

By using Bezier surface matrix formula and the algorithms of texture mapping, the texture mapping onto Bezier surface and its control points net were tested. The texture mapping for Bezier surface model that is composed of six Bezier surfaces was tested too. From the testing examples, it is concluded that these texture mapping algorithms are reliable. All algorithms were implemented by java and java 3d.

关键词： Bezier surfaces Texture mapping java 3d

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java 3d和Swing在外围油田三维裂缝系统中的应用

JAVA 3D和Swing在外围油田三维裂缝系统中的应用

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作者：郭娜吉林大学

学位级别：硕士

大庆外围油田储层条件较差,目前已投入开发油田或区块的生产动态表明,裂缝已对油田注水开发效果产生了不同程度的影响。为了提高油田调整措施的针对性,改善油田的开发效果,外围油田已经开展了系统的精细油藏描述工作。精细油藏描述的一... 详细信息

大庆外围油田储层条件较差,目前已投入开发油田或区块的生产动态表明,裂缝已对油田注水开发效果产生了不同程度的影响。为了提高油田调整措施的针对性,改善油田的开发效果,外围油田已经开展了系统的精细油藏描述工作。精细油藏描述的一个重要的工作是建立研究区的三维地质模型,目前,构造模型、相模型以及属性模型的建立方法已基本成熟。而建立裂缝分布模型还处于尝试阶段,特别是三维显示以及裂缝对储层物性参数的影响方面,还需要攻关。本论文是笔者结合大庆油田有限责任公司勘探开发研究院重点科技攻关项目“外围油田三维裂缝地质模型建立技术研究”完成的。主要论述了“外围油田三维裂缝地质模型建立技术研究”项目中的一部分工作,也就是笔者所完成的、论文中所述的油田完善软件,此软件主要包括两大模块,一个是油田两大应用软件MVE与Petrel的接口问题,即此论文中的格式转换器模块;另一个是裂缝3d绘制模块。在这两部分内容的完成过程中,应用了面向对象的思想、运用了UML。在格式转换器模块中,先对MVE和Petrel中的数据文件格式进行分析对比,找到规律,再将MVE中的线数据经过延伸、插值,转换成能在Petrel中应用的Pillar数据格式,最终实现了MVE与Petrel的良好融合。在裂缝3d绘制模块中采用了java 3d和Swing技术,使用了插值及可视化算法,实现了外围油田三维裂缝的显示功能。这两部分工作的完成为“外围油田三维裂缝地质模型建立技术研究”项目的后续工作奠定了基础,也为最终完善配套的外围油田精细油藏描述技术做好铺垫。

关键词：面向对象 UML java 3d Swing 插值可视化裂缝

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java 3d技术在网络三维课件开发中的应用研究

Java 3D技术在网络三维课件开发中的应用研究

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作者：鲁丽彬华中师范大学

学位级别：硕士

近年来，随着互联网技术与多媒体技术的飞速发展，通过网络实现的远程教育日益得到推广和普及。那么制作高质量的能够方便地在网络上运行的教学辅助课件也就成为更好地实现远程教育的必要条件。本文重点研究了网络多媒体课件中三维课件... 详细信息

近年来，随着互联网技术与多媒体技术的飞速发展，通过网络实现的远程教育日益得到推广和普及。那么制作高质量的能够方便地在网络上运行的教学辅助课件也就成为更好地实现远程教育的必要条件。本文重点研究了网络多媒体课件中三维课件的制作技术与开发。笔者首先研究了网络多媒体课件制作的一般要求、制作原则及方法，分析比较了制作网络多媒体课件的各类工具，探讨了网络三维课件制作的意义，选择了java 3d作为开发网络三维课件的最佳技术。 java 3d技术是java语言在三维领域的扩展，是面向对象的计算机语言。它封装了计算机图形显示的许多功能，而且能直接与鼠标功能相连交互式显示三维模型，能进行图形的消隐及光照颜色的处理等。另外，java 3d程序和其它java程序一样可以在网页上运行。因此，本文重点研究和实践了如何应用java 3d技术开发网络三维多媒体课件。在这当中，首先是探讨了如何利用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等；其次，研究了其它几个典型的三维开发技术的功能和特点，如：OpenGL、Microsoft direct3d以及虚拟现实建模语言VRML，并将它们与java 3d技术作了比较；最后通过对网络三维多媒体课件简单实例的开发，研究了java 3d的技术在多媒体素材的处理、三维动画的制作以及添加纹理和实现几何变换等方面的综合应用。文章最后总结了全篇的内容，指出了java 3d技术与网络三维课件开发的结合有着广阔的应用前景。希望今后能利用这项技术开发出更多具备三维可视化及强大交互功能的优秀网络三维课件，应用到教育领域。

关键词： java 3d 网络三维课件面向对象的设计交互三维模型 VRML

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The 3d Computer Game design using java 3d

The 3D Computer Game Design using Java 3D

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2012 3rd International Conference on Information Technology for Manufacturing Systems(ITMS 2012)

作者： Xinrui Gao deqing Zhao Pingping Yao Information Science Technology Institute of Hainan University

In this thesis, the two 3d computer games were designed by java 3d. In the first game, by using 3dMax, one aircraft carrier, one helicopter, submarines, warships, and destroyer escorts etc were designed. By using Loader3 dS of Microcrow Loader in *** or Model Loader of java 3d, these 3d models are loaded into the java 3d. The second 3d game displays the 3d fighting and collision of tanks. This function is very important for the 3d game design. By using textures, the different appearances of 3d models were designed. By using java 3d classes such as Alpha and Position Path Interpolator and Sounds etc, the motions of 3d models and interactions and the sounds were defined.

关键词： 3d game 3d models interaction java 3d

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Image 3d Reconstruction System for Indoor Environment Based on java 3d

Image 3D Reconstruction System for Indoor Environment Based ...

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2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)

作者： Li Qian College of fine arts Xi'an university of technology Xi'an 710048 China

The reconstruction of virtual indoor environment with sense of reality has a great important significance for consumer to select and purchase a house. java 3d has the characteristics of security and platform independent. It is a strong tool, which help user realize three dimensions stream in network age. With the advantages of java 3d's three-dimensional modeling, we established the image 3d reconstruction system for the indoor environment. The system reconstructed the indoor virtual space through some images, and it can import various formats of threedimensional objects for interactive operating, which to attain the goal of decorating the indoor space virtually. In addition, the system can solve independence of platform and transportability of the system is added. Finally, the proposed method in the paper is testified by the experiment

关键词： java 3d virtual image 3d reconstruction interactive

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用java 3d实现交互式三维场景生成技术的研究

用JAVA 3D实现交互式三维场景生成技术的研究

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作者：刘华伟沈阳工业大学

学位级别：硕士

随着网络技术和计算机三维技术的发展，虚拟现实已经得到广泛应用。本课题在对比了常用的几种图形技术后，选用java 3d图形开发工具进行交互式三维场景生成的研究探讨，并且针对消防部门的具体业务，用面向对象方法设计了一套三维构型... 详细信息

随着网络技术和计算机三维技术的发展，虚拟现实已经得到广泛应用。本课题在对比了常用的几种图形技术后，选用java 3d图形开发工具进行交互式三维场景生成的研究探讨，并且针对消防部门的具体业务，用面向对象方法设计了一套三维构型软件。该软件能使用户通过简便操作快速生成三维高层建筑和大型建筑以及在其中加入防火标记和疏散通道标志，并且能够把它保存下来。用户可以通过文件的形式打开已经存好的场景，对三维场景进行修改。它能够再现高层建筑和大型建筑内部结构，在平时便于消防检查，在火灾发生时可用于现场指挥，因此本课题具有一定的实际意义。论文的工作应用于消防档案，除了与消防业务有关的信息的完备和功能的齐全外，三维场景构建的速度是关键的因素。在交互式操作方面，本文通过比较常用的几种交互式界面，并结合消防部门的具体应用，提出了由二维平面图生成三维场景图的方式。这种方式用户操作简便快捷，能快速生成所需要的场景，并且方便快捷地加入消防标记和疏散通道标记。对于图形软件，修改功能尤为重要。本软件主要是面向高层建筑的生成，只有修改功能很完善，才能灵活地生成高层建筑。通过本软件设计的数据结构，可以对每个楼层进行修改，可以对已经绘制好的建筑物单元删除，也可以对其进行坐标变换，实现对单个或多个建筑物单元同时平移、旋转、放缩。对于场景的存储，使用了数据持久化技术。具体应用了java语言提供的对象序列化文件技术，将表示场景的相关对象依次存入到用户自定义的对象文件中。下次打开场景文件的时候，将文件中存储的对象依次取出并赋值给程序的相应对象中，即可恢复场景。本课题有一定的理论价值和实际价值，其应用前景已经得到公安部沈阳消防科学研究所的认可，正在进一步进展中。

关键词：虚拟现实 VRML java 3d

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