Content area
Full Text
Keywords Fabrics, Drape, Mechanical properties
Abstract Most of the cloth simulation and modelling techniques rely on the energy function of the system. The geometric deformation is related to the energy function by the fabric material characteristics, which are usually difficult to measure directly. This paper discusses how the fabric material properties are related to the measurable mechanical properties of the fabric such as tensile modulus, Poisson's ratio etc. These properties are incorporated into a cloth simulator to produce draping results. The simulated image and real object are then compared to show the realism.
Introduction
Cloth modelling has received considerable attention recently. The applications of this modelling technique are mainly for graphic and engineering purpose. Both visual realism and physical accuracy are of equal interest in these two fields. A lot of researches about cloth modelling have been conducted, which mainly focuses on developing physically based models for the cloth object. These models can be classified into two categories: the continuum model and discrete model. For continuum model, the fabric is considered as continuous object with mass and energies distributed throughout. The governing equations are derived from the variational principle. For the discrete model, the object is modelled as a collection of point masses with some relations among each other. A cloth model can be continuous or discrete but the computational methods are ultimately discrete (Gibson and Miritich, 1997). In addition, these models always possess certain physical quantities, particularly the deformation energy, which is defined to afford simulation algorithms.
Literature review for cloth modelling
The deformable surface proposed by Teropoulos and Fleischer (1988) is a typical continuum model for the cloth. Furthermore, various approaches (Chen et al., 1999; Teropoulos and Fleischer, 1988; Volino et aL, 1995) are discussed to define the potential energy of a deformable model. The final equilibrium state of the model is obtained by minimizing the potential energy with respect to the material displacements. Finite element method (Eischen and Clapp, 1996; Tan...