Bouras, A.Shariat, B.Vandorpe, D.2014-10-212014-10-2119921467-8659https://doi.org/10.1111/1467-8659.1130425In this paper, we propose a method of complex curves description, based on the use of standard primitives (curve arcs), inscribed in including boxes. This method simplifies the creation steps (curves are not defined with the help of control points), and the manipulation steps (using including boxes).This study constitutes an extension to our descriptive universal language, named"G", which is used in a general desig n environment, permitting the integration of various models (solids1, polyhedrons2, surfaces3 and fractals), in order to offer the adequate tools adapted to the problems to be solved, in a unique modeller.10.1111/1467-8659.1130425425-433