Multi-Layer Implicit Garment Models

This paper presents a new way to model clothing worn by articulated implicit characters. A scalar field is produced using ellipsoids as primitives. Isosurfaces are then used to place garments in one or more layers. As each implicit surface is independent, collision detection is not needed. The cloth is a polygonal mesh whose vertices are in turn moved towards their destination isosurface using the gradient of the scalar field. In order to maintain the cloth's shape and size a net of simple springs is used. We improve appearance by adding noise to simulate wrinkles and light wind. 1. Introduction Computer animations that we can see today consist mostly of rigid solid objects. Lately, however, we are starting to see flexible objects being used more often. Solid objects are usually described by a polygon mesh that is too complex to manage in a vertex by vertex way, as is often the case when dealing with flexible characters. Implicit surfaces can be used to model them. An implicit surfa..