Extraction of generative processes from B-Rep shapes and application to idealization transformationsReport as inadecuate




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1 IMAGINE - Intuitive Modeling and Animation for Interactive Graphics & Narrative Environments Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble 2 EADS IW - EADS Innovation Works Suresnes

Abstract : A construction tree is a set of shape generation processes commonly produced with CAD modelers during a design process of B-Rep objects. However, a construction tree does not bring all the desired properties in many configurations: dimension modifications, idealization processes, etc. Generating a non trivial set of generative processes, possibly forming a construction graph, can significantly improve the adequacy of some of these generative processes to meet user-s application needs. This paper proposes to extract generative processes from a given B-rep shape as a high-level shape description. To evaluate the usefulness of this description, finite element analyses FEA and particularly idealizations are the applications selected to evaluate the adequacy of additive generative processes. Non trivial construction trees containing generic extrusion and revolution primitives behave like well established CSG trees. Advantageously, the proposed approach is primitive-based, which ensures that any generative process of the construction graph does preserve the realizability of the corresponding volume. In the context of FEA, connections between idealized primitives of a construction graph can be efficiently performed using their interfaces. Consequently, generative processes of a construction graph become a high-level object structure that can be tailored to idealizations of primitives and robust connections between them.

Keywords : B-Rep model Construction graph Generative shape process Idealization





Author: Flavien Boussuge - Jean-Claude Léon - Stefanie Hahmann - Lionel Fine -

Source: https://hal.archives-ouvertes.fr/



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