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Workstations and publication systems
Books for effective and stable evaluation of a beta-spline. Also established is the variation diminishing property, which has implications for the shape of such a spline curve, and necessary and sufficient conditions for interpolation with beta-splines to be well posed. Based on Goodman's approach, Dierckx and Tytgat recently developed a conversion routine from beta-spline to B6zier polynomial representation, and a knot insertion algorithm 6'7. Their work has been published after the book was written. It would be desirable for a later edition of the book to have this material treated as well, as it will certainly be interesting to potential readers. Like every specialized mathematical text, the book is not
cheap. Taking into account the good printing quality (hard cover, high quality print and fine paper, colour illustrations), I would consider it worth its price. REFERENCES 1 B6hm, W, Farin, G and Kahmann, l 'A survey of curve and surface methods in CAGD' Comput. Aided Geom. Des. Vol 1 No 1 (1984) pp 1-6O 2 Goodman, T N T and Unsworth, K 'Generation of beta-spline curves using a recurrence relation' in: Earnshaw, R A (ed.) Fundamental
algorithms for computer graphics NATO ASI Series, Vol F17 (1985) 3 de Boor, C A practical guide to splines Springer, Berlin, FRG (1978)
4 Schumaker, L L Spline functions, basic theory Wiley, New York (1981) 5 Goodman, T N T 'Properties of beta-splines' J. Approx. Theory Vol 44 (1985) pp 132-153 6 Dierckx, P and Tytgat, B 'Inserting new knots into beta-spline curves' Report TW "108 Katholeike Universiteit Leuven, Department of Computer Science, Leuven, Belgium (1988) 7 Dierckx, P and Tytgat, B 'Generating the Bezier points of a betaspline curve' Report TW "109 Katholeike Universiteit Leuven, Department of Computer Science, Leuven, Belgium (1988)
G Baszenski
Review of electronic publishing deals with software Workstations and publication systems R A Earnshaw Springer, Berlin, FRG (1987) 229 pp DM58 The content matter of this volume is software running on modern workstations for the production of publication quality documents. The familiar theme of desk-top publication is certainly included, but also more ambitious multiuser systems and all electronic publishing are discussed. The bulk of the material might, however, be classed as DTP oriented. One might infer from the title of the book that workstation hardware technology to support such software is also discussed - this is not the case. The volume deals only with software. This is a subject area always
pushed hard by, and, indeed, more often led by, commercial products. As such, the book contains a mix of academic and commercial sourced papers. Much of the interest of the volume arises from the commercial content. A notable article is that by J Honeywell of the British newspaper Today. It is easy reading with much of interest. In a book about publication systems, one must sat a few words about the quality of the layout. This is certainly one of most attractively set books I have seen containing conference proceedings, and for a price tag of only DM58[ There are no jaggy dot matrix produced papers to be seen here. But there are still problems. Surprisingly, many of the papers have spelling errors surely publication systems include
spelling checkers. Also, the typeface changes in style and size among papers leave a taste of lesser productions. For anyone involved in the implementation of a word-processing or document-processing system, this is essential reading. Papers describe implementation strategies for software components (e.g., postcript drivers), and the design of a variety of document production systems is discussed, particularly with regard to the user interface. Those with an interest in graphics systems in general are also likely to find something of interest in this volume; not enough I think for a personal copy, but certainly for a library copy.
D Hendry
Corrigenda In the paper 'Method for fairing B-spline surfaces' by N J Lott and D I Pullin (published in Computer-Aided Design Vol 20 No 10 (December 1988) pp 597-604), Figures 4 and 7, and 5 and 8, were accidentally transposed during the publication process. In the paper 'Graphical representation of design optimization' by S A Burns (published in Computer-Aided Design Vol 21 No 1 (January/February 1989) pp 21-24), Colour Plate 1 was accidentally inverted, and Colour Plates 2 and 3 were rotated through 90 ° anticlockwise during the publication process.
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cheap. Taking into account the good printing quality (hard cover, high quality print and fine paper, colour illustrations), I would consider it worth its price. REFERENCES 1 B6hm, W, Farin, G and Kahmann, l 'A survey of curve and surface methods in CAGD' Comput. Aided Geom. Des. Vol 1 No 1 (1984) pp 1-6O 2 Goodman, T N T and Unsworth, K 'Generation of beta-spline curves using a recurrence relation' in: Earnshaw, R A (ed.) Fundamental
algorithms for computer graphics NATO ASI Series, Vol F17 (1985) 3 de Boor, C A practical guide to splines Springer, Berlin, FRG (1978)
4 Schumaker, L L Spline functions, basic theory Wiley, New York (1981) 5 Goodman, T N T 'Properties of beta-splines' J. Approx. Theory Vol 44 (1985) pp 132-153 6 Dierckx, P and Tytgat, B 'Inserting new knots into beta-spline curves' Report TW "108 Katholeike Universiteit Leuven, Department of Computer Science, Leuven, Belgium (1988) 7 Dierckx, P and Tytgat, B 'Generating the Bezier points of a betaspline curve' Report TW "109 Katholeike Universiteit Leuven, Department of Computer Science, Leuven, Belgium (1988)
G Baszenski
Review of electronic publishing deals with software Workstations and publication systems R A Earnshaw Springer, Berlin, FRG (1987) 229 pp DM58 The content matter of this volume is software running on modern workstations for the production of publication quality documents. The familiar theme of desk-top publication is certainly included, but also more ambitious multiuser systems and all electronic publishing are discussed. The bulk of the material might, however, be classed as DTP oriented. One might infer from the title of the book that workstation hardware technology to support such software is also discussed - this is not the case. The volume deals only with software. This is a subject area always
pushed hard by, and, indeed, more often led by, commercial products. As such, the book contains a mix of academic and commercial sourced papers. Much of the interest of the volume arises from the commercial content. A notable article is that by J Honeywell of the British newspaper Today. It is easy reading with much of interest. In a book about publication systems, one must sat a few words about the quality of the layout. This is certainly one of most attractively set books I have seen containing conference proceedings, and for a price tag of only DM58[ There are no jaggy dot matrix produced papers to be seen here. But there are still problems. Surprisingly, many of the papers have spelling errors surely publication systems include
spelling checkers. Also, the typeface changes in style and size among papers leave a taste of lesser productions. For anyone involved in the implementation of a word-processing or document-processing system, this is essential reading. Papers describe implementation strategies for software components (e.g., postcript drivers), and the design of a variety of document production systems is discussed, particularly with regard to the user interface. Those with an interest in graphics systems in general are also likely to find something of interest in this volume; not enough I think for a personal copy, but certainly for a library copy.
D Hendry
Corrigenda In the paper 'Method for fairing B-spline surfaces' by N J Lott and D I Pullin (published in Computer-Aided Design Vol 20 No 10 (December 1988) pp 597-604), Figures 4 and 7, and 5 and 8, were accidentally transposed during the publication process. In the paper 'Graphical representation of design optimization' by S A Burns (published in Computer-Aided Design Vol 21 No 1 (January/February 1989) pp 21-24), Colour Plate 1 was accidentally inverted, and Colour Plates 2 and 3 were rotated through 90 ° anticlockwise during the publication process.
volume 21 number 3 april 1989
187