没有合适的资源?快使用搜索试试~ 我知道了~
首页Geometric and solid modeling.pdf
Geometric and solid modeling.pdf
![](https://csdnimg.cn/release/wenkucmsfe/public/img/star.98a08eaa.png)
Today, our imagination is limited by the computer systems we have built. The demand for sophisticated tools has grown faster than the corresponding<br>developments of the supporting science base. Written by one of the leading experts in the Meld of solid-modeling systems, Geometric and Solid Modeling: An Introduction provides the start of a scientimc basis to support the coming revolution in computer-aided design. It deals with the concepts and tools needed to design and implement solidmodeling systems, and makes this information accessible to the novice, as well as to the experienced designer.
资源详情
资源推荐
![](https://csdnimg.cn/release/download_crawler_static/249141/bg1.jpg)
GEOMETRIC AND SOLID
MODELING
CHRISTOPH M. HOFFMANN
![](https://csdnimg.cn/release/download_crawler_static/249141/bg2.jpg)
![](https://csdnimg.cn/release/download_crawler_static/249141/bg3.jpg)
Foreword
Today, our imagination is limited by the computer systems we have built.
The demand for sophisticated to ols has grown faster than the corresp onding
developments of the supporting science base.
Written by one of the leading exp erts in the eld of solid-modeling sys-
tems,
Geometric and Solid Modeling: An Introduction
provides the start of
a scientic basis to supp ort the coming revolution in computer-aided design.
It deals with the concepts and tools needed to design and implement solid-
mo deling systems, and makes this information accessible to the novice, as
well as to the exp erienced designer.
Man has always distinguished himself from other animals with the aid of
language, art, and to ols. Language and art remain man's way of representing
ideas, either for communicating them to other p eople or for giving them
p ermanence. Tools extend his strength and mobility.
In early so ciety, to ols were simple and the ideas b ehind their function and
manufacture were easily communicated, either verbally or by example. As the
complexity of to ols increased, written drawings and other do cuments b ecame
an essential comp onent of design. In today's technologically advanced so ciety,
in which to ols have reached the complexity of a spacecraft, the development
of a design requires a team of engineers. Writing, and even drawing and
sculpting, are found to be inadequate; they are static and of to o limited a
dimension for expressing complex designs.
Computers are revolutionizing our ability to represent, develop, and com-
iii
![](https://csdnimg.cn/release/download_crawler_static/249141/bg4.jpg)
iv
municate knowledge. By abstracting knowledge into pro cedures, computers
provide dynamic and powerful representations, and enhance our ability to
manipulate and expand our thoughts.
In the past, a new pro duct was created by investigating a design in the
abstract, using paper, p encil and whatever other tools were available. The
design was communicated through the medium of engineering drawings to a
manufacturer who built the device. In the future, computers will b e used to
explore much larger design spaces, and designs will b e communicated directly
to machines manufacturing the pro duct. The result will b e a wider selection
of pro ducts of higher quality and lower cost.
Imagine using a computer mo del of an ob ject instead of a physical pro-
totyp e to validate a complex design. The computer prototyp e would allow
changes with a few key strokes, as well as allow engineering analyses to be
automatically carried out. For example, a multingered gripp er could be
mo deled and electronically simulated in various manipulation tasks, explor-
ing the advantage of the number and placement of ngers.
In the early stages of a new technology, the techniques and methods of
the older technology are simply simulated. Gradually the full power of the
new technology is achieved as new metho ds utilizing the natural advantages
of the technology are develop ed. Thus it was not surprising that the initial
usage of Computer Aided Design systems was in automating drafting. To-
day, computer-aided-design (CAD) systems provide new representations of
ob jects as three-dimensional entities rather than as two-dimensional pro jec-
tions. Ultimately we will realize that an ob ject is dened by something more
intrinsic than its shape.
Solid modeling and computer-aided design are quickly b ecoming vital to
economic productiveness. The sophistication of new pro ducts has necessi-
tated a coinciding sophistication in such engineering to ols as computer-aided
design systems and analysis programs. The Bo eing 767 could not have b een
designed without such automated to ols. Similarly, complex parts for space-
craft, rob otic workcells and VLSI technology are accelerating this need.
Geometric and Solid Modeling: An Introduction
is a welcome introduction
to an increasingly sophisticated and fast-growing eld.
John E. Hopcroft
Cornell University
Ithaca
1989
![](https://csdnimg.cn/release/download_crawler_static/249141/bg5.jpg)
Acknowledgements
John Hop croft has challenged computer science to involve itself in the prob-
lems of geometric and solid modeling. I wish to acknowledge his eloquence
and p ersuasiveness as he set forth the foundation for computer science to
have a unique and valuable p ersp ective on these problems.
Iwant to particularly thank Bruno Buchberger, Ray Sarraga, Jarek Rossignac,
Kevin Weiler, Dan Gottlieb, Ari Requicha, Mike Karasick, and Chee Yap,
for the many fo cused and precise suggestions they made, and I wish to recog-
nize the signicant amount of time they sp ent to do so. From their valuable
feedback, this b o ok b enets greatly.
Thanks to my students, Bill Bouma, Ching-Sho ei Chiang, Jung-Hong
Chuang, Neelam Jasuja, Chris Scherbert, Pam Vermeer, Jia-Xun Yu, and
Jianhua Zhou, who havechecked the manuscript for accuracy, and who served
as a\Turing test" for clarity.
My research has b een supp orted by the National Science Foundation under
grants DCR 85-12443, CCR 86-12590, CCR 86-19817, and DMC 88-07550;
by the OÆce of Naval Research, under contract N00014-86-K-0465; and by
a grant from the ATT Foundation.
v
剩余343页未读,继续阅读
![azw4](https://img-home.csdnimg.cn/images/20210720083646.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
安全验证
文档复制为VIP权益,开通VIP直接复制
![](https://csdnimg.cn/release/wenkucmsfe/public/img/green-success.6a4acb44.png)