Articles in HPJournal

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If you want postscript or compressed postscript format you can find the files under HP-Journal, October 95


HP PE/SolidDesigner: Dynamic Modeling for Three-Dimensional Computer-Aided Design

by Klaus-Peter Fahlbusch and Thomas D. Roser
In most solid modeling CAD systems, knowledge of the history of the design is necessary to avoid unanticipated side-effects when making changes. With dynamic modeling, local geometry and topology changes can be made independently of the model creation at any time, using both direct and dimension-driven methods. The core components enabling dynamic modifications are the tool body and the relation saver.

(285 K)


User Interaction in HP PE/SolidDesigner

by Berthold Hug, Gerhard J. Walz, and Markus Kühl
The HP PE/SolidDesigner user interface is modeled after the successful easy-to-use, easy-to-learn interface of earlier HP CAD products. All commands are coded as Common Lisp action routines. A user interface builder helps command programmers by hiding details of the X Window System and the OSF/Motif(TM) graphical user interface. Prototyping was done using a specially developed Lisp-based interface to OSF/Motif(TM) called HCLX.

(463 K)


Enhancements in Blending Algorithms

by Stefan Freitag and Karsten Opitz
This article describes a rounding operation for a 3D CAD boundary representation (B-Rep) solid model. Complex combinations of convex and concave edges are handled predictably and reliably. At vertices the surfaces are smoothly connected by one or more surface patches. An algorithm for the creation of blending surfaces and their integration into the model is outlined. The sequence of topological modifications applied to the solid model is illustrated by examples including some special case handling.

(356 K)


Open Data Exchange with HP PE/SolidDesigner

by Peter J. Schild, Wolfgang Klemm, Gerhard J. Walz, and Hermann J. Ruess
Surface and solid data can be imported from ME30 and exchanged with systems supporting the IGES, STEP, and ACIS formats. Imported data coexists with and can be manipulated like native data.

Providing CAD Object Management Services through a Base Class Library

by Claus Brod and Max R. Kublin
SolidDesigner's data structure manager makes it possible to save a complex 3D solid model and load it from file systems and databases. Using the concepts of transactions and bulletin boards, it keeps track of changes to a model, implements an undo operation, and notifies external applications of changes.

(200 K)

Article Addendum--Exception Handling and Development Support

(30 K)

Freeform Surface Modeling

by Michael Metzger and Sabine Eismann
There are two methods for creating freeform surfaces in SolidDesigner: blending and lofting. This article describes the basics of lofting. The geometry engine, which implements the lofting functionality, uses a single-data-type implementation for its geometric interface, but takes a multiple-data-type, hybrid approach internally.

(281 K)

Common Lisp as an Embedded Extension Language

by Jens Kilian and Heinz-Peter Arndt
A large part of HP PE/SolidDesigner's user interface is written in Common Lisp. Common Lisp is also used as a user-assessable extension language.

(171 K)

Boolean Set Operations with Solid Models

by Peter H. Ernst
The Boolean engine of SolidDesigner applies standard and nonstandard Boolean set operations to solid models to perform an impressive variety of machining operations. Parallel calculation boosts performance, especially with multiprocessor hardware.
(201 K)

3D/2D Slashes Time to Market

The paperless office

Given the importance of reduced time-to-market in competitive manufacturing markets, any time that can be saved in the time-consuming documentation cycle is a valuable step towards staying ahead of the competition. This article looks at how automatic updating of 3D design changes on the related 2D documentation saves time within the revision cycle. The 3D/2D associativity benefits offered by HP Mechanical Design Solutions are examined, including SolidDesigner, ME10 2D drafting and design system and WorkManager, a product data and workflow management system.


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