1、 本科毕业论文题 目：三维服装试衣系统 碰撞检测及响应的研究与实现姓 名：学 院：软件学院系：软件工程专 业：软件工程年 级： 级学 号：指导教师： 职称：副教授 年 月本科毕业论文三维服装试衣系统碰撞检测与响应的研究与实现摘要三维服装试衣系统是基于虚拟现实技术的一个重点实验项目，而碰撞检测及响应是该系统的一个重要组成部分。碰撞主要分为两个部分：一是衣片与人体的碰撞，二是衣片的自碰撞。衣片与人体的碰撞检测，其目的为根据不同体型，设定衣片与人体的最佳距离，以及为碰撞响应提供先决条件。衣片的自碰撞检测，是根据衣片的悬垂等性质来模拟真实的衣服皱褶等现象。本文先描述对衣片进行碰撞前的准备工作，包括：三角网格划分、添加弹簧等。接着对布料与球体的碰撞进行研究，并将其改进成前后两个衣片与人体的碰撞检测及响应。首先对衣片及人体进行包围盒划分，其采用的方法为基于AABB包围盒划分；接着控制衣片的运动，使之逐渐向人体靠近；最后检查到衣片和人体的碰撞，并进行碰撞响应。本文进一步的对碰撞后的前后衣片进行缝合，使之成为一件完整的衣服。最后将缝合后的衣片整合在同一个数组中，以便今后对衣片添加纹理、风吹等真实效果。
2、综上所述，本论文对碰撞检测及响应的整个流程进行整合概括，对每一步骤所用到的算法进行分析试验，并且最终将分开的衣片合成完整的衣服，使之穿在人体上，已达到模拟现实的虚拟结果。关键词： 三维试衣系统 碰撞检测及响应 衣片缝合Abstract 3D garment-fitting system is a focus of pilot project that based on virtual reality technology, and the collision-checking and response is an important component of this system.Collision includes two parts: one is the collision between cloth and body; the other is the self-collision of cloth. The first one sets up a best distance between the cloth and the body for different somat
3、otypes, and provides pre-conditions for collision-response. The second one, according to cloths overhanging phenomena, simulates the real cloth.At first, this paper describes the prepare work for collision-checking, such as triangle gridding partition, adding springs and so on. Then we study the collision principle between sphere and the cloth, and improve it onto a collision between a body and two cloth which before and after it. At the first step, they (both body and cloth) are required to be
4、partitioned by AABB boxes. Second, we have to control the cloth moving to the body .At last, the system checks whether the cloth comes into collision with the body. If it happens, the system carries out the collision-response immediately.Furthermore, this paper describes the processes of cloth-stitching after collision so that they can become integrative clothes. Then, the system puts all the particles of cloth into an array so as to add texture, wind and other real natural effect.To sum up, thi
5、s paper generalizes the entire processes of the collision-checking and response, analyzes the algorithm used on each step, and finally puts the clothes which are made up by several separate clothes on the model. This imitation is a vivid virtual reality effect.Keywords: 3D garment-fitting system collision-checking and response cloth-stitching目录第一章引言7第二章衣片划分研究82.1 第一步 衣片网格划分82.2 第二步 衣片添加弹簧102.3 第三步 衣片包围盒划分112.4 第四步 人体包围盒划分112.5 第五步 衣片向人体运动112.6 实验效果图11第三章建立层次包围盒133.1层次包围盒概念133.2 层次包围盒约束条件133.3 层次
6、包围盒算法分类133.3.1包围球Sphere143.3.2 方向包围盒OBB143.3.3 沿坐标轴的包围盒AABB143.3.4三种包围盒算法比较与抉择153.4 AABB包围盒存储优化153.4.1 AABB树的构造163.4.2 优化方法163.4.3 优化后结果173.4.4 人体AABB树17第四章碰撞检测184.1 衣片与人体碰撞检测184.1.1 碰撞检测原理184.1.2 基于AABB层次包围盒树的碰撞检测算法实现194.1.3 碰撞检测两大步骤194.2 衣片自碰撞检测204.2.1 自碰撞检测由来与原理214.2.2自碰撞检测的算法实现224.3 实验效果图244.3.1 未进行碰撞检测244.3.2 碰撞检测后25第五章碰撞响应265.1 碰撞响应定义265.2 碰撞响应分析265.3 碰撞响应实现方法265.4 碰撞响应效果图275.5 实验效果图27第六章衣片缝合286.1 衣片缝合原理286.2 衣片缝合步骤286.3 衣片缝合的算法实现296.4 实验效果图30第七章总结与展望317.1 总结317.2 展望31致谢32参考文献33附录34Content
7、sChapter One Introduction7Chapter Two Research in Cloth Gridding82.1 Step Gridding Partition of Cloth82.2 Step Adding Springs on Cloth102.3 Step Boxes Partition of Cloth112.4 Step Boxes Partition of Body112.5 Step Cloth Moving Close to Body112.6 Some Pictures of Experiment Result11Chpater Three Building Delamination Boxes133.1 Notion of Delamination Boxes133.2 Obligation Condition of Delamination Boxes133.3 Different Sorts of Delamination Boxes Arithmetic133.3.1 Sphere Box143.3.2 OBB Box143.3.3
8、AABB Box143.3.4 Comparision and Choise Among These Three Sorts153.4 Optimizion of AABB Boxs Storage153.4.1 Structure of AABB Tree163.4.2 The Optimizion Method163.4.3 Result After Optimizion173.4.4 The AABB Tree of body17Chapter Four Collision-Checking184.1 Collision-Checking Between Cloth and Body184.1.1 Theory of Collision-Checking184.1.2 Arithmetic Realization of Collision-Checking by AABB Box194.1.3 Two Steps of Collision-Checking194.2 Self-Collision of Cloth214.2.1 Origin and Theory of Self-
9、Collision214.2.2 Arithmetic Realization of Self-Collision224.3 Some Pictures of Experiment Result244.3.1 Results Before Collision-Checking244.3.2 Results After Collision-Checking25Chapter Five Collision Response265.1 Definition of Collision Response265.2 Analysis of Collision Response265.3 Realization Method of Collision Response265.4 Results of Collision Response275.5 Some Pictures of Experiment Result27Chapter Six Cloth-Stitching286.1 Theory of Cloth-Stitching286.2 Steps of Cloth-Stitching286.3 Arithmetic Realization of Cloth-
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