虚拟衣物仿真中褶皱机理及模拟方法研究

The performance of virtual clothing depends on wrinkle simulation greatly. In this research, warp- weft springs structure was introduced into mass-spring modal, which could simulate the property of cloth reasonably. A wrinkle modeling based on the multi- parameter of wrinkle line and cross-section was proposed which could use real wrinkle data directly and form complex wrinkle conveniently. When enhancing the wrinkle lied on the body, the 2D and 3D distance of border points of cross-section were taken into account to conform to the shape and size. To simulate the buckling appearance of wrinkle near body joints, a compress-stretch method was presented which could display the assembling behavior of joint wrinkle by preserve the length of wrinkle cross-section curves. Texture wrinkle simulation was based on the analysis of pre-stress whose region could be extracted from texture image, and the revise operation was limited in the partial region by explicit integration to guarantee the harmony.

衣物仿真的效果主要取决于褶皱模拟的逼真程度，本项目围绕分类褶皱的形成机理分析及仿真模拟开展研究：在质点弹簧模型的基础上引入经纬线弹簧结构，建立新的物理仿真模型，具备更好的物理合理性；依托褶皱基线和横截面函数构建褶皱模型，能直接利用真实采集的褶皱数据建模，且可合成复杂形态褶皱。形体褶皱增强方法在构建褶皱模型时，依据横截面边界点的空间距离和平面距离分别约束横截面函数的底边宽度和弧长，符合褶皱的形态规律；关节弯曲褶皱遵循投影曲线总弧长不变的原则模拟褶皱汇聚现象，符合弯曲褶皱的形变规律，且可避免复杂的自碰撞处理；记忆褶皱模拟采用基于预应力分析的局部物理仿真修正的策略，与衣物粗仿真的结果更为协调。

衣物仿真的效果主要取决于褶皱模拟的逼真程度，本项目围绕分类褶皱的形成机理分析及仿真模拟开展研究：在质点弹簧模型的基础上引入经纬线弹簧结构，建立新的物理仿真模型，具备更好的物理合理性；依托褶皱基线和横截面函数构建褶皱模型，能直接利用真实采集的褶皱数据建模，且可合成复杂形态褶皱。形体褶皱增强方法在构建褶皱模型时，依据横截面边界点的空间距离和平面距离分别约束横截面函数的底边宽度和弧长，符合褶皱的形态规律；关节弯曲褶皱遵循投影曲线总弧长不变的原则模拟褶皱汇聚现象，符合弯曲褶皱的形变规律，且可避免复杂的自碰撞处理；记忆褶皱模拟采用基于预应力分析的局部物理仿真修正的策略，与衣物粗仿真的结果更为协调。形成了一个完整通用的衣物仿真框架、研究提出了一套衣物仿真领域的关键算法，给出了相应的技术实现方案，具有良好的物理真实性、算法合理性和视觉逼真性，为后续进一步的理论技术研究及产业化应用打下了良好的基础。