Specification of a CAD * I Neutral File for CAD Geometry
Specification of a CAD * I Neutral File for CAD Geometry

Author: E.G. Schlechtendahl

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 243

ISBN-13: 3642836224

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ESPRIT Project 322, "CAD Interfaces", has been established to define the most important interfaces in CAD/CAM systems for data exchange, data base, finite element analysis, experimental analysis, and advanced modeling. The definitions of these interfaces are being elaborated in harmony with international standardization efforts in this field. One principal goal of the project is to develop techniques for the exchange of CAD information between CAD systems, and from the CAD domain to CAA (Computer Aided Analysis) and CAM (Computer Aided Manufacturing). This volume presents a proposal for a neutral file format for CAD data: curves, surfaces, and solids. The specification is based on a reference schema for CAD data bases and is defined informally with respect to its semantics and formally with respect to its syntax. This volume is a revised edition of "Specification of a CAD*I Neutral File for Solids" Version 3.2. The revision reflects the enhancements which result from the implementation of communication processors in eight different CAD systems and from the practical exchange of solid models between these systems. Due to the close interaction between the CAD*I project and the coming-up international standard STEP this specification also serves as an introduction to the geometry model that will be included in the future international standard.

Specification of a CAD * I Neutral File for CAD Geometry
Specification of a CAD * I Neutral File for CAD Geometry

Author: E.G. Schlechtendahl

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 259

ISBN-13: 3642970575

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1.1 PURPOSE The purpose of this paper is to document the results of Working Group (wireframes), Working Group 2 (solids) ,and Working Group 3 (surfaces) of the ESPRIT project 322 CAD*I (CAD Interfaces). The goal of these working groups is: 1. Develop a neutral file format for transfer of CAD data (curves, surfaces, and solid models) between CAD systems, and from the CAD domain to CAA (computer aided analysis) and CAM (computer aided manufacturing). 2. Develop pre- and post-processors with a number of representative CAD systems for this neutral file format. 3. Develop representative test model files and perform cycle tests and inter-system tests for CAD model transfer. 4. Contribute to the standardization activities in the national standardi zation bodies and in ISO for the establishment of a neutral file format for CAD data. This paper corresponds to a development stage as it was reached on July 6, 1987.

Theory and Practice of Geometric Modeling
Theory and Practice of Geometric Modeling

Author: Wolfgang Straßer

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 534

ISBN-13: 3642615422

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This book is a result of the lectures and discussions during the conference "Theory and Practice of Geometric Modeling". The event has been organized by the Wilhelm-Schickard-Institut fiir Informatik, Universitat Tiibingen and took place at the Heinrich-Fabri-Institut in Blaubeuren from October 3 to 7, 1988. The conference brought together leading experts from academic and industrial research institutions, CAD system developers and experien ced users to exchange their ideas and to discuss new concepts and future directions in geometric modeling. The main intention has been to bridge the gap between theoretical results, performance of existing CAD systems and the real problems of users. The contents is structured in five parts: A Algorithmic Aspects B Surface Intersection, Blending, Ray Tracing C Geometric Tools D Different Representation Schemes in Solid Modeling E Product Modeling in High Level Specifications The material presented in this book reflects the current state of the art in geometric modeling and should therefore be of interest not only to university and industry researchers, but also to system developers and practitioners who wish to keep up to date on recent advances and new concepts in this rapidly expanding field. The editors express their sincere appreciation to the contributing authors, and to the members of the program committee, W. Boehm, J. Hoschek, A. Massabo, H. Nowacki, M. Pratt, J. Rossignac, T. Sederberg and W. Tiller, for their close cooperation and their time and effort that made the conference and this book a success.

Esprit ’89
Esprit ’89

Author: CEC, DG for Telecommunications

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 1136

ISBN-13: 9400910630

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The 6th ESPRIT Conference is being held in Brussels from the 27th November to the 1 st December 1989. Well over 1500 participants from all over Europe are expected to attend the various events during the week. The Conference will offer the opportunity to be updated on the results of ongoing Esprit projects and to develop Europe-wide contacts with colleagues, both within a specific branch of Information Technology and across different branches. The first three days of the week are devoted to presentations of Esprit I projects, structured into plenary and parallel sessions; this year there is special emphasis on panels and workshops where participants can exchange ideas and hold in-depth discussions on specific topics. The different areas of Esprit work are covered: Microelectronics, Informa tion Processing Systems, Office and Business Systems, Computer Integrated Manufac turing, Basic Research and different aspects of the Information Exchange System. During the IT Forum on Thursday 30th November, major European industrial and political decision-makers will address the audience in the morning. In the afternoon, different aspects of Technology Transfer will be discussed with the participation of outside experts, and presentations on the future plans for community R&D in IT will take place.

Boundary Representation Modelling Techniques
Boundary Representation Modelling Techniques

Author: Ian Stroud

Publisher: Springer Science & Business Media

Published: 2006-12-22

Total Pages: 789

ISBN-13: 1846286166

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Boundary representation is the principal solid modelling method used in modern CAD/CAM systems. There have been a long series of developments on which currently available systems are based, full details of which are only partially known. Ian Stroud’s thorough coverage of these developments puts this technology in perspective and provides the most complete presentation of boundary representation solid modelling yet published.

CAD and GIS Integration
CAD and GIS Integration

Author: Hassan A. Karimi

Publisher: CRC Press

Published: 2009-12-17

Total Pages: 250

ISBN-13: 1420068067

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When used together effectively, computer-aided design (CAD) and geospatial information systems (GIS) have a solid track record for streamlining decision making and reducing inefficiencies in the design, planning, and execution of critical operations and projects. And a growing number of engineering tasks in numerous fields-including design, archite

Information Control Problems in Manufacturing Technology 1989
Information Control Problems in Manufacturing Technology 1989

Author: E.A. Puente

Publisher: Elsevier

Published: 2014-06-28

Total Pages: 711

ISBN-13: 1483298833

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The Symposium presented and discussed the latest research on new theories and advanced applications of automatic systems, which are developed for manufacturing technology or are applicable to advanced manufacturing systems. The topics included computer integrated manufacturing, simulation and the increasingly important areas of artificial intelligence and expert systems, and applied them to the broad spectrum of problems that the modern manufacturing engineer is likely to encounter in the design and application of increasingly complex automatic systems.

Advanced Geometric Modelling for Engineering Applications
Advanced Geometric Modelling for Engineering Applications

Author: Frank-Lothar Krause

Publisher: North Holland

Published: 1990

Total Pages: 476

ISBN-13:

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Future generations of Computer-Aided Design (CAD) systems are expected to offer powerful support for the functional, geometrical and technological description of products. New intelligent system architectures covering feature modelling, knowledge processing and simulation techniques, as well as comprehensive information access capabilities will open novel possibilities for product modelling. The result will be a real opportunity for direct cooperation between human creativity/discernment and information processing systems, working together to draft and analyze technical products. In this book, leading researchers and system developers present, discuss and summarize research and development of new theories, as well as advanced applications of geometric modelling.

Building Product Models
Building Product Models

Author: Charles M Eastman

Publisher: CRC Press

Published: 2018-02-06

Total Pages: 424

ISBN-13: 1351462881

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Building Product Models thoroughly presents the concepts, technology, and methods now used to work out what will become the building product model - a new, digital representation for architecture, civil engineering, and building construction. Organized into three sections (history, current tools and concepts, and existing efforts and research issues), this resource provides the field of building product modeling with a standard reference as well as a single, comprehensive text for university courses. Until now, all the efforts in building modeling have been reported in research journals and conference proceedings or been made available as draft standards on the Internet. Building Product Models is the only book available on this vital field, bringing together essential aspects of major efforts from the early 1970s to the present.