Sketchpad for Windows
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Paper We Present an Early User Evaluation of a Advances in Sketch-Based Modeling Are Set to Simplify Many Sketch-Based 3D Modeling Tool We Have Been Developing [7,8]
ARTICLE IN PRESS Computers & Graphics 31 (2007) 580–597 www.elsevier.com/locate/cag Calligraphic Interfaces An evaluation of user experience with a sketch-based 3D modeling system Levent Burak KaraÃ, Kenji Shimada, Sarah D. Marmalefsky Mechanical Engineering Department, Carnegie Mellon University, Pittsburgh, PA 15213, USA Abstract With the availability of pen-enabled digital hardware, sketch-based 3D modeling is becoming an increasingly attractive alternative to traditional methods in many design environments. To date, a variety of methodologies and implemented systems have been proposed that all seek to make sketching the primary interaction method for 3D geometric modeling. While many of these methods are promising, a general lack of end user evaluations makes it difficult to assess and improve upon these methods. Based on our ongoing work, we present the usage and a user evaluation of a sketch-based 3D modeling tool we have been developing for industrial styling design. The study investigates the usability of our techniques in the hands of non-experts by gauging (1) the speed with which users can comprehend and adopt to constituent modeling steps, and (2) how effectively users can utilize the newly learned skills to design 3D models. Our observations and users’ feedback indicate that overall users could learn the investigated techniques relatively easily and put them in use immediately. However, users pointed out several usability and technical issues such as difficulty in mode selection and lack of sophisticated surface modeling tools as some of the key limitations of the current system. We believe the lessons learned from this study can be used in the development of more powerful and satisfying sketch-based modeling tools in the future. -
HCI Remixed : Essays on Works That Have Influenced the HCI
4 Drawing on SketchPad: Refl ections on Computer Science and HCI Joseph A. Konstan University of Minnesota, Minneapolis, Minnesota, U.S.A. I. Sutherland, 1963: “Sketchpad: A Man–Machine Graphical Communication System” Sutherland’s SketchPad system, paper, and dissertation provide, for me, the answer to the oft-asked question: “why should HCI belong in a computer science program?” I fi rst came across the paper “SketchPad: A Man–Machine Graphical Communica- tion System” from the 1963 AFIPS conference nearly thirty years after it had been published (Sutherland 1963). I was nearing completion of my own dissertation in which I was exploring a variety of techniques for constructing user interface toolkits. At the time, the paper seemed little more than a handy reference in which I could trace the lineage of constraint programming in user interfaces—from Sketchpad, through Borning’s ThingLab (Borning 1981), to my own work, with various hops and detours along the way. I guess I was young and in a hurry. It was only a few years later when I started to teach this material that I realized how much of today’s computing traces its roots to Sutherland’s work. What was this tremendous paper about? A drawing program. Not just any drawing program, but one that took full advantage of computing, a million-pixel display (albeit with a slow pixel-by-pixel refresh), a light pen, and various buttons and dials to empower users to draw and repeat patterns, to integrate constraints with draw- ings so as to better understand mechanical systems, and to draw circuit diagrams as input to simulators. -
A New Era for Mechanical CAD Time to Move Forward from Decades-Old Design JESSIE FRAZELLE
TEXT COMMIT TO 1 OF 12 memory ONLY A New Era for Mechanical CAD Time to move forward from decades-old design JESSIE FRAZELLE omputer-aided design (CAD) has been around since the 1950s. The first graphical CAD program, called Sketchpad, came out of MIT [designworldonline. com]. Since then, CAD has become essential to designing and manufacturing hardware Cproducts. Today, there are multiple types of CAD. This column focuses on mechanical CAD, used for mechanical engineering. Digging into the history of computer graphics reveals some interesting connections between the most ambitious and notorious engineers. Ivan Sutherland, who won the Turing Award for Sketchpad in 1988, had Edwin Catmull as a student. Catmull and Pat Hanrahan won the Turing award for their contributions to computer graphics in 2019. This included their work at Pixar building RenderMan [pixar. com], which was licensed to other filmmakers. This led to innovations in hardware, software, and GPUs. Without these innovators, there would be no mechanical CAD, nor would animated films be as sophisticated as they are today. There wouldn’t even be GPUs. Modeling geometries has evolved greatly over time. Solids were first modeled as wireframes by representing the object by its edges, line curves, and vertices. This evolved into surface representation using faces, surfaces, edges, and vertices. Surface representation is valuable in robot path planning as well. Wireframe and surface acmqueue |march-april 2021 5 COMMIT TO 2 OF 12 memory I representation contains only geometrical data. Today, modeling includes topological information to describe how the object is bounded and connected, and to describe its neighborhood. -
Mystic Microsoft
Kraig Brockschmidt Mystic Microsoft A Journey of Transformation in the Halls of High Technology Kraig Brockschmidt You’re invited to copy, print, and share this book… It’s free and it’s legal Mystic Microsoft is published under the Creative Commons Attribution-Noncommercial- No Derivative Works 2.5 License (see next page) This means you may freely and legally share, copy, distribute, and display this book without the need to worry about lawyers, royalties, and all that sort of stuff. This book’s website (www.mysticmicrosoft.com) even gives you all the files you need to print and bind your own copies. Of course, you are not allowed to make any changes to this work, nor are you allowed to use it for commercial purposes or profit from it in any way without permission from the author. As this book is offered freely, readers are encouraged, though not required, to reciprocate in two ways: (1) Express gratitude to the author by making a monetary contribution to the author’s work and/or writing a positive testimonial about the book with permission to use your words in promotional activities. See www.mysticmicrosoft.com for details or write to the author’s address on the next page. (2) “Pay it forward” by sharing the book with others and/or making a gift of money or volunteered time to a worthy cause of your choice. So that these gifts do not go unnoticed, please inform the author of your gifts via www.mysticmicrosoft.com (or regular mail) so the website can show the positive contributions that this work has inspired. -
Evolution and Composition of Object-Oriented Frameworks
Evolution and Composition of Object-Oriented Frameworks Michael Mattsson University of Karlskrona/Ronneby Department of Software Engineering and Computer Science ISBN 91-628-3856-3 © Michael Mattsson, 2000 Cover background: Digital imagery® copyright 1999 PhotoDisc, Inc. Printed in Sweden Kaserntryckeriet AB Karlskrona, 2000 To Nisse, my father-in-law - who never had the opportunity to study as much as he would have liked to This thesis is submitted to the Faculty of Technology, University of Karlskrona/Ronneby, in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Engineering. Contact Information: Michael Mattsson Department of Software Engineering and Computer Science University of Karlskrona/Ronneby Soft Center SE-372 25 RONNEBY SWEDEN Tel.: +46 457 38 50 00 Fax.: +46 457 27 125 Email: [email protected] URL: http://www.ipd.hk-r.se/rise Abstract This thesis comprises studies of evolution and composition of object-oriented frameworks, a certain kind of reusable asset. An object-oriented framework is a set of classes that embodies an abstract design for solutions to a family of related prob- lems. The work presented is based on and has its origin in industrial contexts where object-oriented frameworks have been developed, used, evolved and managed. Thus, the results are based on empirical observations. Both qualitative and quanti- tative approaches have been used in the studies performed which cover both tech- nical and managerial aspects of object-oriented framework technology. Historically, object-oriented frameworks are large monolithic assets which require several design iterations and are therefore costly to develop. With the requirement of building larger applications, software engineers have started to compose multiple frameworks, thereby encountering a number of problems. -
Essential Pascal
Marco Cantù Essential Pascal 2nd Edition, March 2003 (version 2.01) APOLLO, THE GOD WORSHIPED AT DELPHI, IN AN ITALIAN 17TH CENTURY FRESCO. Essential Pascal [Copyright 1995-2003 Marco Cantù] www.marcocantu.com/epascal 1 Introduction he first few editions of Mastering Delphi, the best selling Delphi book I've written, provided an introduction to the Pascal language in Delphi. Due to space constraints and T because many Delphi programmers look for more advanced information, in the latest edition this material was completely omitted. To overcome the absence of this information, I've started putting together this ebook, titled Essential Pascal. This is a detailed book on Pascal, which for the moment will be available for free on my web site (I really don't know what will happen next, I might even find a publisher). This is a work in progress, and any feedback is welcome. The first complete version of this book, dated July '99, has been published on the Delphi 5 Companion CD. Note to the Second Edition After a few years (in the early 2003), the book had a complete revision, trying to refocus it even more on the core features of the Pascal language. Alongside, the book covers the language from the perspective of the Delphi for Windows programmer, but also of the Kylix and Delphi for .NET programmer. Differences among these different versions of the language will be mentioned. This change in focus (not only Delphi with the VCL library) was another reason to change most of the examples from visual ones to console based ones – something I plan doing but that I still haven't done. -
La Guía De Delphi Por Francisco Charte
La guía de Delphi por Francisco Charte © Danysoft 2012 2 - DERECHOS RESERVADOS El contenido de esta publicación tiene todos los derechos reservados, por lo que no se puede reproducir, transcribir, transmitir, almacenar en un sistema de recuperación o traducir a otro idioma de ninguna forma o por ningún medio mecánico, manual, electrónico, magnético, químico, óptico, o de otro modo. La persecución de una reproducción no autorizada tiene como consecuencia la cárcel y/o multas. LIMITACIÓN DE LA RESPONSABILIDAD Tanto el autor como en Danysoft hemos revisado el texto para evitar cualquier tipo de error, pero no podemos prometerle que el libro esté siempre libre de errores. Por ello le rogamos nos remita por e-mail sus comentarios sobre el libro a [email protected] DESCUENTOS ESPECIALES Recuerde que Danysoft ofrece descuentos especiales a centros de formación y en adquisiciones por volumen. Para más detalles, consulte con Danysoft. MARCAS REGISTRADAS Todos los productos y marcas se mencionan únicamente con fines de identificación y están registrados por sus respectivas compañías. Autor: Francisco Charte Publicado en castellano por Danysoft Avda. de la Industria, 4 Edif. 1 3º 28108 Alcobendas, Madrid. España. 902 123146 | www.danysoft.com ISBN: 978-84-939910-1-2 Depósito Legal: M-9679-2012 Por acuerdo entre el Autor y Editor, este libro se ofrece sin coste. El contenido no se puede modificar, ni obtener beneficio por su redistribución, ni eliminar la información del autor y editor del mismo. IMPRESO EN ESPAÑA © Danysoft | Madrid, 2012 La guía de DELPHI por Francisco Charte Prólogo - 3 Prólogo A mis hijos: David y Alejandro A mi alma gemela en esta travesía: María Jesús El libro que tienes en tus manos ha sido escrito pensando en los distintos tipos de desarrolladores que podrían estar interesados en la última versión de la herramienta estrella de Embarcadero: Delphi XE2. -
14. Advanced Windows Concepts
• multi-tasking or multi-threading of a single application, which 14. Advanced Windows Concepts allow parts of an application to still move ahead with useful This section will survey some advanced concepts used in MS- computations even though other parts of the same application Windows programming. First, we will look at a number of are blocked. forms of Inter-Process Communication (IPC). IPC is the generic Optional Readings: the rest of the chapters from [Shildt95] term used for passing data between different processes, programs, or threads: • The clipboard can be used to cut and paste not only within one application, but between applications. • Drag-And-Drop is a feature for dragging a file to an application window or icon, and having the destination application know what to do with it (and if not running, to be started to deal with it). • Dynamic Data Exchange (DDE) is a simple way for a data server process to allow access by client processes. • Object Linking and Embedding (OLE) has developed past simple embedding another application’s objects (e.g. diagrams or tables) in a document. • Component Object Model (COM) is the underlying mechanism by which the sophisticated features of OLE can work; in fact COM has recently been extended to provide inter- communication between application running on different computers (‘Distributed COM’). We will also briefly look into Dynamic Link Libraries, which allow run-time linking to application or system procedure libraries. Finally, if time permits, we may discuss: • how some of the complications of Windows programming can be abstracted and simplified using a C++ OO class library of various window and control types. -
Facilitating the Implementation of Computer-Aided Design Into the Engineering Graphics and Design Classroom
Facilitating the implementation of Computer-Aided Design into the Engineering Graphics and Design classroom by Ciana Rust Submitted in fulfilment of the requirements for the degree MAGISTER EDUCATIONIS in the Faculty of Education at the UNIVERSITY OF PRETORIA SUPERVISOR: PROF L VAN RYNEVELD AUGUST 2017 Declaration I declare that the dissertation, which I hereby submit for the degree Magister Educationis at the University of Pretoria, is my own work and has not previously been submitted by me for a degree at this or any other tertiary institution. ............................................................. Ciana Rust 31 August 2017 i Ethical Clearance Certificate ii iii iv Dedication I dedicate this research to my family, friends, colleagues and learners whom I have taught throughout my educational career. Without my mother, father and brother, I would not be the person who I am today. They have guided me to choose education as a career path, which led me to this point in my life. All my love goes out to you. To my glorious Father who gave me the strength, dedication and patience to persevere throughout this process of discovery, I thank Thee. v Acknowledgements To have achieved this milestone in my life, I would like to express my sincere gratitude to the following people: My Heavenly Father, who provided me with the strength, knowledge and perseverance to complete this study; Prof Linda van Ryneveld, research supervisor, for her invaluable advice, guidance and inspiring motivation during difficult times and throughout the research; My editor, Leandri le Roux, without whom this would not have been possible; Last but not least, my beautiful family and amazing friends. -
Essential Delphi – Copyright 1996-2002 Marco Cantù – 1
Marco Cantù's Essential Delphi – Copyright 1996-2002 Marco Cantù – www.marcocantu.com/edelphi 1 MMARCOARCO CCANTÙANTÙ''SS EESSENTIALSSENTIAL DDELPHIELPHI A Friendly Introductory Guide to Borland Delphi http://www.marcocantu.com/edelphi Copyright 1996-2002 Marco Cantù Revision 1.03 - April 13, 2002 Marco Cantù's Essential Delphi – Copyright 1996-2002 Marco Cantù – www.marcocantu.com/edelphi 2 INTRODUCTION fter the successful publishing of the e-book Essential Pascal (available on my web site at the address http://www.marcocantu.com/epascal), I decided to follow up with an Aintroduction to Delphi. Again most of the material you'll find here was in the first editions of my “printed” book Mastering Delphi, the best selling Delphi book I have written. Due to space constraints and because many Delphi programmers look for more advanced information, in the latest edition this material was completely omitted. To overcome the absence of this information, I have started putting together this second on- line book, titled Essential Delphi. Copyright The text and the source code of this book are copyrighted by Marco Cantù. Of course, you can use the programs and adapt them to your own needs with no limitation, only you are not allowed to use them in books, training material, and other copyrighted formats without my permission (or in case you are using limited portions, referring to the original). Feel free to link your site with this one, but please do not duplicate the material (on your web site, on a CD) as it is subject to frequent changes and updates. Passing a copy to a friend, occasionally, is certainly something you can do if you do not modify it in any way. -
21 Miscellaneous Companies
Chapter 21 Miscellaneous Companies Space restrictions simply do not permit me to go into the depth of detail I would like on every company that participated in the early days of the CAD industry nor cover numerous in-house systems developed at major automobile and aerospace companies. Readers will have to be satisfied with the brief descriptions included in this chapter and even then, I have only been able to cover what I consider to be the companies that had the biggest impact. There are hundreds if not thousands of companies that at one time marketed engineering design software. Some of the companies described in this chapter offered just software while other provided both hardware and software. While many have changed names, I have decided to list them alphabetically based upon the name they are best been known by along with earlier and subsequent name changes. Adra Systems (Matrix One) Adra Systems was founded in Lowell, Massachusetts in July 1983 by William Mason, who had been at Applicon from 1973 to 1983, most recently as vice president of operations, James Stenzel, who had been vice president of engineering at Hastech, Inc., and Peter Stoupas, who had earlier been a regional sales manager at Adage and had also worked for Applicon. Mason became the president and CEO, Stenzel the vice president of product development and Stoupas the vice president of marketing. Between 1983 and 1986, the company raised $11.6 million of venture funding from a number of firms including American Research & Development, the company that also provided the initial funding for Digital Equipment Corporation. -
Lauren Bricker
lauren at brickware dot com bricker at cs dot washington dot edu Lauren Bricker https://homes.cs.washington.edu/~bricker/ Education University of Washington Seattle, WA 1990 - 1998 Computer Science MS 1993, PhD 1998. Thesis: Cooperatively Controlled Objects in Support of Collaboration University of Michigan Ann Arbor, MI 1982 - 1985 Theoretical Mathematics and Pre-Medicine, B. S., Honors College Research and Teaching Interests I have a wide variety of interests in teaching and research, including Human Computer Interaction (HCI) including Computer Supported Cooperative Work (CSCW), Computer Supported Collaborative Learning (CSCL), Equitable and Active Computer Science Education, Educational Technology, Engineering principles, Rapid prototyping and 3D modeling and printing, and computer graphics and animation. Professional Experience University of Washington Seattle, WA 2017 – present Paul G Allen School of Computer Science and Engineering Computer Science Faculty Lecturer and K-12 Outreach • CSE 190Z – STARS CSE Workshops. STARS is a two-year program to support engineering and computer science students from underserved high schools as they transition and navigate the large required introductory courses such as Math, Chemistry, Physics, and Computer Science. o Autumn 2017, 2018, 2019 – STARS Pre-CSE problem solving course: Developed and taught the new STARS Pre-CSE course. The goal of the course was to allow students the time and space to practice essential skills required to be successful in CSE 142 (Computer Programming 1), including problem solving process, computational thinking, persistence, communication and collaboration, creativity as well as time management. Students use these skills as they learn the “just enough” basic programming in Java to design and develop a small project of their own in the 10-week course.