多媒体教学软件中的虚拟场景制作

在多媒体教学软件中嵌入虚拟场景可以实现生动教学的目的。采用AutoCAD2000三维建模技术建立对象的三维模型，然后利用3DMAXR3．0对三维模型进行渲染和动画制作，最后通过程序生成虚拟场景。嵌入虚拟场景的多媒体教学软件更具生动性、直观性，可以达到身临其境的效果。     

山间飞翔的动画制作

玩过“魔法飞毯”一类游戏的朋友,一定会对其中峰峦叠障的山岭和飞翔时的快感留下了深刻的印象。随同我们走一遭后,你也可以做出诸如“在建筑物内部游览”、“火箭卫星在太空遨游”等动画来。下面是制作“飞翔在山岭中”的过程。 一、用AutoCAD制作山的模型 在AutoCAD 12.0中用Mountain.exp来制作动画中的山脉框架模型。首先用acadr12命令进入Acad程     

三维双缓存动画模拟软件制作系统设计

为了提高三维双缓存动画模拟和视觉重现能力,利用三维视觉重构和嵌入式VR构架,设计三维双缓存动画模拟软件制作系统.首先构建三维双缓存动画模拟软件的总体结构模型,采用嵌入式BS构架体系进行系统的结构分析,利用物联网组网技术进行动画模拟软件制作系统的网络组网设计,采用VR技术进行三维动画制作过程中的虚拟现实仿真和三维视觉重构,在数据处理模块中处理三维双缓存动画模拟的图像,结合高分辨的视觉重建算法,进行三维双缓存动画模拟控制和视觉重建,实现三维双缓存动画模拟的系统优化设计.仿真结果表明,采用该方法进行三维双缓存动画模拟的视觉表达效果较好,3D动画模拟逼真度较高,系统的稳定性较好,人机交互能力较强.     

机器人仿生脸的三维运动仿真

本文对人类产生典型表情时眼睛、眉毛、嘴和下颌的运动过程进行了分析,统计出了各器官的运动范围。采用AutoCAD和3DS MAX设计制作出了机器人仿生脸的三维结构模型,并建立了机器人仿生脸的机构运动传递关系。通过MAXScript脚本程序实现了三维运动仿真的参数化控制,获得了几种典型表情的仿真动画。     

使用AutoCAD和PowerPoint制作绘图动画的方法

介绍了使用AutoCAD和PowerPoint制作绘图动画的方法,该方法简便易学,不需使用其他专业动画软件即可制作出满足教学要求的动画。     

基于三维结构的骨骼动画技术在二维动画中的应用

动画造型的运动控制是二维动画由传统手绘向计算机辅助制作转变过程中的重点、难点问题之一。针对这一问题,研究分析三维骨骼动画技术的数据结构和运动原理,并将其应用到二维动画制作过程中,同时结合二维动画的数据特点,提出三维骨骼和二维图形之间的绑定方法,实现基于三维骨骼的二维动画过程。应用结果表明三维结构的骨骼动画技术能够有效提高二维动画制作效率和动画质量。     

基于Pro／E和3DSMax的缝纫机原理仿真动画制作研究

缝纫机原理仿真动画对缝纫机主要功能零件模型的几何尺寸准确度要求较高．利用Pro/E对缝纫机零部件进行精确建模和装配,将三维模型导入3DS Max中进行材质渲染和动画制作,完成缝纫机原理仿真动画。充分发挥Pro／E和3DS Max软件各自的优势,解决单独使用3DS Max软件在机构动画制作中零件的尺寸和装配不准确的问题,为机构仿真动画制作提供新思路。     

一种改进的PowerPoint 工程图动画制作方法研究

PowerPoint 制作的动画在目前工程制图教学中占据主要地位,但是PPT 中图形的 绘制和动画的制作以及修改都很困难,提出一种结合AutoCAD 矢量图形制作动画方法,很好 地解决了图形绘制以及动画定义后的再修改问题。     

三维数字技术在建筑漫游动画中的应用研究

在人们可视化要求越来越高、市场需求不断增加的数字媒体时代,建筑漫游动画的市场迅速发展起来.通过多年的教学和实践经验,分析了建筑漫游动画的特点、作用、需求和实现技术,研究了三维数字技术在建筑漫游动画中的应用,利用三维数字技术制作了潍坊职业学院滨海校区建筑漫游动画,总结了建筑漫游动画的制作要点、制作流程、技巧、注意事项和建筑漫游动画制作关键技术.指出了建筑漫游动画是未来建筑表现的一种新形式,也是三维数字技术新的应用领域.     

基于Pro/ENGINEER和3ds Max的缝纫机原理仿真动画制作研究

缝纫机原理仿真动画对缝纫机主要功能零件模型的几何尺寸准确度要求较高,利用Pro/ENGINEER对缝纫机零部件进行精确建模和装配,将三维模型导入3ds?Max中进行材质渲染和动画制作,完成缝纫机原理仿真动画。充分发挥了Pro/ENGINEER和3ds?Max软件各自的优势,解决了单独使用3ds?Max软件在机构动画制作中零件的尺寸和装配不准确的问题,为机构仿真动画制作提供了新思路。     

基于语音驱动的三维人脸动画技术综述

随着三维数字虚拟人的发展,语音驱动三维人脸动画技术已经成为虚拟人交互的重要研究热点之一.其关键技术在于语音-视觉映射模型的建立以及三维人脸动画的合成.首先分析了音-视素匹配法和音-视觉参数映射两类方法的特点;之后阐述了目前三维人脸模型的建立方法,并依据三维人脸模型的表示方法不同,分析了不同运动控制方法的优缺点;然后阐述了语音驱动三维人脸动画的主观评价和客观评价方法;最后总结了语音驱动三维人脸动画技术的未来发展方向.     

面向影视动画的真实感三维人脸快速建模算法

针对影视动画领域,利用LS_5000型三维激光扫描仪,提出了一套真实感三维人脸快速建模算法。只需输入真实演员人脸的三维扫描点云和未定标的照片,以及极少的人工交互,即可生成虚拟演员真实感的三维人脸模型（包括几何模型、纹理模型和面向动画的可变模型）。实验结果表明,算法输出的模型简洁规范,可直接应用于实际的影视动画制作,提高了人脸模型建模效率。     

Improving the communication performance of distributed animation rendering using BitTorrent file system

Rendering is a crucial process in the production of computer generated animation movies. It executes a computer program to transform 3D models into series of still images, which will eventually be sequenced into a movie. Due to the size and complexity of 3D models, rendering process becomes a tedious, time-consuming and unproductive task on a single machine. Accordingly, animation rendering is commonly carried out in a distributed computing environment where numerous computers execute in parallel to speedup the rendering process. In accordance with distribution of computing, data dissemination to all computers also needs certain mechanisms which allow large 3D models to be efficiently moved to those distributed computers to ensure the reduction of time and cost in animation production. This paper presents and evaluates BitTorrent file system (BTFS) for improving the communication performance of distributed animation rendering. The BTFS provides an efficient, secure and transparent distributed file system which decouples the applications from complicated communication mechanism. By having data disseminated in a peer-to-peer manner and using local cache, rendering time can be reduced. Its performance comparison with a production-grade 3D animation favorably shows that the BTFS outperforms traditional distributed file systems by more than 3 times in our test configuration.     

Three-dimensional cartoon facial animation based on art rules

Three-dimensional (3D) cartoon facial animation is one step further than the challenging 3D caricaturing which generates 3D still caricatures only. In this paper, a 3D cartoon facial animation system is developed for a subject given only a single frontal face image of a neutral expression. The system is composed of three steps consisting of 3D cartoon face exaggeration, texture processing, and 3D cartoon facial animation. By following caricaturing rules of artists, instead of mathematical formulations, 3D cartoon face exaggeration is accomplished at both global and local levels. As a result, the final exaggeration is capable of depicting the characteristics of an input face while achieving artistic deformations. In the texture processing step, texture coordinates of the vertices of the cartoon face model are obtained by mapping the parameterized grid of the standard face model to a cartoon face template and aligning the input face to the face template. Finally, 3D cartoon facial animation is implemented in the MPEG-4 animation framework. In order to avoid time-consuming construction of a face animation table, we propose to utilize the tables of existing models through model mapping. Experimental results demonstrate the effectiveness and efficiency of our proposed system.     

具有真实感的三维人脸动画

具有真实感的三维人脸模型的构造和动画是计算机图形学领域中一个重要的研究课题.如何在三维人脸模型上实时地模拟人脸的运动,产生具有真实感的人脸表情和动作,是其中的一个难点.提出一种实时的三维人脸动画方法,该方法将人脸模型划分成若干个运动相对独立的功能区,然后使用提出的基于加权狄里克利自由变形DFFD(Dirichlet free-form deformation)和刚体运动模拟的混合技术模拟功能区的运动.同时,通过交叉的运动控制点模拟功能区之间运动的相互影响.在该方法中,人脸模型的运动通过移动控制点来驱动.为了简化人脸模型的驱动,提出了基于MPEG-4中脸部动画参数FAP(facial animation parameters)流和基于肌肉模型的两种高层驱动方法.这两种方法不但具有较高的真实感,而且具有良好的计算性能,能实时模拟真实人脸的表情和动作.     

手机3D动画自动生成系统中的色彩规划

手机3D动画自动生成系统依据短信内容,自动生成相应的3D动画并随原短信一同发送给接收方.色彩规划是其中一个重要环节,它根据短信主题和动画场景信息对动画的色彩进行规划,修改场景中物体颜色.提出了一种基于语义网技术的规划方法,结合色彩知识建立知识库,通过情节推理,找到和短信主题色彩意象匹配的配色方案,再根据动画场景信息对配色方案进行筛选,最后细化到每个物体的颜色.色彩规划弥补了自动生成的动画在视觉效果上千篇一律、单调乏味的缺陷,增强了动画的灵活性、多变性.     

Stylized rendering using samples of a painted image

We introduce a novel technique to generate painterly art map (PAM) for 3D non-photorealistic rendering. Our technique can automatically transfer brush stroke textures and color changes to 3D models from samples of a painted image. Therefore, the generation of stylized images/animation in the style of a given artwork can be achieved. This new approach works particularly well for a rich variety of brush strokes ranging from simple 1D and 2D line-art strokes to very complicated ones with significant variations in stroke characteristics. During the rendering/animation process, the coherence of brush stroke textures and color changes over 3D surfaces can be well maintained. With PAM, we can also easily generate the illusion of flow animation over a 3D surface to convey the shape of a model.     

AutoCAD三维实体图形生成二维图形的实现

计算机辅助设计(CAD)是计算机应用技术中一项重要的技术。在CAD领域中,技术人员利用专门的计算机辅助设计软件来制作表现物体几何特征。AutoCAD是新一代计算机辅助设计软件,其功能强大,使用方便的特点在多种工程设计中得到广泛的应用。AutoCAD有强大的三维功能,可以在三维空间中先建立模型并从不同角度观察和处理模型,从三维模型可以生成各个方向的视图。本文主要介绍在AutoCAD中使用相关命令完成三维实体图形生成二维图形的方法。     

HandPuppet3D: Motion capture and analysis for character animation

Motion capture is a technique of digitally recording the movements of real entities, usually humans. It was originally developed as an analysis tool in biomechanics research, but has grown increasingly important as a source of motion data for computer animation. In this context it has been widely used for both cinema and video games. Hand motion capture and tracking in particular has received a lot of attention because of its critical role in the design of new Human Computer Interaction methods and gesture analysis. One of the main difficulties is the capture of human hand motion. This paper gives an overview of ongoing research “HandPuppet3D” being carried out in collaboration with an animation studio to employ computer vision techniques to develop a prototype desktop system and associated animation process that will allow an animator to control 3D character animation through the use of hand gestures. The eventual goal of the project is to support existing practice by providing a softer, more intuitive, user interface for the animator that improves the productivity of the animation workflow and the quality of the resulting animations. To help achieve this goal the focus has been placed on developing a prototype camera based desktop gesture capture system to capture hand gestures and interpret them in order to generate and control the animation of 3D character models. This will allow an animator to control 3D character animation through the capture and interpretation of hand gestures. Methods will be discussed for motion tracking and capture in 3D animation and in particular that of hand motion tracking and capture. HandPuppet3D aims to enable gesture capture with interpretation of the captured gestures and control of the target 3D animation software. This involves development and testing of a motion analysis system built from algorithms recently developed. We review current software and research methods available in this area and describe our current work.