Journal ArticleDOI
A Declarative Design Method for 3D Scene Sketch Modeling
Stéphane Donikian,Gérard Hégron +1 more
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TLDR
A dynamic model associated with an intelligent CAD system aiming at the modeling of an architectural scene sketch and the design methodology has been developed to simulate the process of a user who tries to give a description of a scene from a set of mental images.Abstract:
In this paper, we present a dynamic model associated with an intelligent CAD system aiming at the modeling of an architectural scene sketch. Our design methodology has been developed to simulate the process of a user who tries to give a description of a scene from a set of mental images. The scene creation is based on a script which describes the environment from the point of view of an observer who moves across the scene. The system is based on a declarative method viewed as a stepwise refinement process. For the scene representation, a qualitative model is used to describe the objects in terms of attributes, functions, methods and components. The links between objects and their components are expressed by a hierarchical structure, and a description of spatial configurations is given by using locative relations. The set of solutions consistent with the description is usually infinite. So, either one scene consistent with this description is calculated and visualized, or reasons of inconsistency are notified to the user. The resolution process consists of two steps: firstly a logical inference checks the consistency of the topological description, and secondly an optimization algorithm deals with the global description and provides a solution. Two examples illustrate our design methodology and the calculation of a scene model.read more
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Constraint-Based 3D-Object Layout using a Genetic Algorithm
TL;DR: This work presents a general-purposed constraint-based system able to process a complex set of constraints, including geometric and pseudo-physics ones, and universal quantifiers and Boolean combination of constraints are allowed to make the layout description easier.
Book ChapterDOI
QUAD-CLP(R): Adding the Power of Quadratic Constraints
Gilles Pesant,Michael Boyer +1 more
TL;DR: A new way of handling non-linear arithmetic constraints and its implementation into the QUAD-CLP(R) language is reported, with the present focus on applications upholding its worth.
Book ChapterDOI
Reactivity, Concurrency, Data-flow and Hierarchical Preemption for Behavioural Animation
Stéphane Donikian,Eric Rutten +1 more
TL;DR: This work examines the adequacy for decision making of the behavioural model in the following programming paradigms: reactivity, concurrency, data-flow and hierarchical preemption.
Proceedings ArticleDOI
Modelling with constraints: a bibliographical survey
TL;DR: The concepts of constraints and constraint solvers are presented, and the principal resolution methods are classified, giving their drawbacks and shortcomings.
Journal ArticleDOI
Simulation Models for French Praxitele Project
TL;DR: The Praxitele project was charged with designing a new kind of transportation in an urban environment, which consisted of a fleet of electric public cars capable of autonomous motion on certain displacements between stations, and a new simulator system was designed.