Accurate and Efficient Visual Simulation of Fiber-based Mechanical Structures

纤维机械结构的准确高效的视觉模拟

• 批准号: 0702490
• 负责人: Steve Marschner
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0702490&HistoricalAwards=false
• 关键词: Accurate; Efficient; Visual; Simulation; Fiber

Accurate and Efficient Visual Simulation of Fiber-based Mechanical StructuresSteve Marschner, Cornell UniversityMany of the most difficult challenges in simulation for computer graphics involve materials composed of fibers. In applications where appearance matters, from designing textiles and apparel to rendering virtual actors to formulating hair cosmetics, understanding how these materials' physical properties affect their motion and appearance is crucial. Fiber-based structures behave differently from other materials. A knit fabric is much more extensible than its component yarns because the yarns can bend and slide into different macroscopic shapes. A head of long hair moves freely but smoothly, making and breaking millions of hair-hair contacts to produce a partly smooth, partly discontinuous overall motion. This research aims to improve the accuracy of cloth and hair simulation by fundamentally changing the underlying physical and computational models.The project follows an approach of measurement, modeling, simulation, and validation. Image-based measurement is used to capture complete fabric deformations. This data, together with the literature on yarn-level textile mechanics, is used to develop constitutive models based on the actual physics of fabric, which are simulated using advanced numerical methods not normally employed in textile simulation. The results are being evaluated both against the laboratory data and in the context of real problems in apparel design. By bringing together the tools of modern graphics and simulation with the detailed models of textile mechanics in a rigorous process of validation, this project is placing computer graphics cloth simulation on a firm scientific foundation for the future. Computational methods devised for fiber-fiber interactions are also being extended for efficient strand-level simulation of hair. After the simulations are validated, the project will examine approximations and algorithms to allow efficient simulation. The end result will be new, physics-based models for the mechanics of cloth and hair that are appropriate for visual applications.

精确高效的纤维基机械结构可视化仿真Steve Marschner，康奈尔大学计算机图形学仿真中许多最困难的挑战都涉及由纤维组成的材料。在外观很重要的应用中，从设计纺织品和服装到渲染虚拟演员再到配制头发化妆品，了解这些材料的物理特性如何影响它们的运动和外观至关重要。基于纤维的结构与其他材料的行为不同。 针织物比其组分纱线更具有延展性，因为纱线可以弯曲并滑动成不同的宏观形状。 一头长发自由而平稳地运动，形成和断开数百万根头发与头发的接触，从而产生一种部分平滑、部分不连续的整体运动。 本研究的目的是从根本上改变基本的物理和计算模型，以提高布料和头发模拟的准确性。该项目遵循测量，建模，模拟和验证的方法。 基于图像的测量用于捕获完整的织物变形。 这些数据，连同文献纱线级纺织力学，是用来开发本构模型的基础上，织物的实际物理，这是模拟使用先进的数值方法，通常不采用纺织模拟。 结果正在评估对实验室数据和服装设计中的真实的问题的背景下。通过在严格的验证过程中将现代图形和模拟工具与纺织力学的详细模型结合在一起，该项目将计算机图形织物模拟置于未来的坚实科学基础上。 设计用于纤维-纤维相互作用的计算方法也被扩展用于有效的头发束级模拟。 在模拟得到验证后，该项目将检查近似值和算法，以实现有效的模拟。 最终的结果将是新的，基于物理的模型，适用于视觉应用的布料和头发的力学。