Physically Based Real-time Animation of Curtains

We propose a novel model for curtain real-time animation, which not only significantly reduces the time of rendering, but is also able to maintain visually appealing results. Conventional physically based models for cloth simulations are typically dense sheets of interwoven strings, with particles of finite mass at the intersections. While it seems to be an accurate model for cloth, it also implies that significant computation is required in solving a time-varying partial differential equation. Under certain circumstances, specific simplifications can be made. Our simplified curtain model is represented as a semi-rigid object. The longitudinal (warp) and latitudinal (woof) connections are processed separately. Furthermore, we provide a uniform treatment of internal and external forces.