Variational geometric modeling with black box constraints and DAGs
TypeArticles dans des revues avec comité de lecture
CAD modelers enable designers to construct complex 3D shapes with high-level B-Rep operators. This avoids the burden of low level geometric manipulations. However a gap still exists between the shape that the designers have in mind and the way they have to decompose it into a sequence of modeling steps. To bridge this gap, Variational Modeling enables designers to specify constraints the shape must respect. The constraints are converted into an explicit system of mathematical equations (potentially with some inequalities) which the modeler numerically solves. However, most of available programs are 2D sketchers, basically because in higher dimension some constraints may have complex mathematical expressions. This paper introduces a new approach to sketch constrained 3D shapes. The main idea is to replace explicit systems of mathematical equations with (mainly) Computer Graphics routines considered as Black Box Constraints. The obvious difficulty is that the arguments of all routines must have known numerical values. The paper shows how to solve this issue, i.e., how to solve and optimize without equations. The feasibility and promises of this approach are illustrated with the developed DECO (Deformation by Constraints) prototype.
Files in this item
Showing items related by title, author, creator and subject.
SURLERAUX, Anthony; LEPERT, Romain; PERNOT, Jean-Philippe; BIGOT, Samuel (Future Technology Press, 2015)This paper describes a new efficient method for computer aided optimisations of micro EDM die sinking tools, which can be used for design optimisation and performance verification in the digital domain. This would facilitate ...
LOU, Ruding; PERNOT, Jean-Philippe; VERON, Philippe; GIANNINI, Franca; FALCIDIENO, Bianca; MIKCHEVITCH, Alexei; MARC, Raphael (IEEE Computer Society, 2010)Advances in modeling of discrete models have allowed the development of approaches for direct mesh modeling and modification. These tools mainly focus on modeling the visual appearance of the shape which is a key criterion ...
LOU, Ruding; GIANNINI, F; PERNOT, Jean-Philippe; MIKCHEVITECH, A; VERON, Philippe; FALCIDIENO, B; MARC, R (Proceedings of FOCUS-K3D Conference on Semantic 3D Media and Content, 2010)Nowadays, most of the numerical simulations in product maintenance are carried out by several loops of the following steps: 1) CAD model creation/optimization, 2) Finite Element (FE) mesh generation, 3) insertion of ...
LOU, Ruding; GIANNINI, Franca; FALCIDIENO, Bianca; PERNOT, Jean-Philippe; VERON, Philippe; MIKCHEVITCH, Alexei; MARC, Raphael (World Scientific Publishing Company, 2010)Behaviour analysis loop is largely performed on virtual product model before its physical manufacturing. The last avoids high expenses in terms of money and time spent on intermediate manufacturing. It is gainful from the ...
LOU, Ruding; GIANNINI, F; PERNOT, Jean-Philippe; MIKCHEVITECH, A; VERON, Philippe; FALCIDIENO, B; MARC, R (Tools and Methods for Competitive Engineering (TMCE'10), 2010)Nowadays, the mainstream methodology for product behavior analysis and improvement relies on the fol-lowing steps: 1) conceptual solution proposal and CAD prototyping, 2) mesh model creation for Finite Element (FE) analysis, ...