巻号一覧
21 巻, 2 号
選択された号の論文の6件中1～6を表示しています
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相澤 龍彦1987 年 21 巻 2 号 p. 3-9
発行日: 1987年
公開日: 2010/08/25
ジャーナル フリーIn the computer-aided designs for castings or forgings, we encounter many complex shaped surfaces, which are difficult to create or evaluate even with use of modern CAD systems. Further, structural or mechanical engineers are annoyed with lack of methodology to evaluate adaptiveness of generated surfaces; conventional graphic tools are unuseful in the above cases.
In the present study, one proposes an engineering method to deal with curved surfaces appearing in the practical designs. Based on the differential geometry and computational processings, the proposed approach employs an indicator for evaluation of curved surfaces, and gauss image is applied to represent the distribution of gauss curvetures. Through rough comparison of generated gauss images, one can see differences of curved surfaces. Furthermore, using the present approach, one can estimate the graphical accuracy of approximate triangular development method for both developable and undevelopable surfaces.抄録全体を表示PDF形式でダウンロード (619K) -
鶴野 玲治, 宮副 幸子, 磯山 秀幸, 長江 貞彦1987 年 21 巻 2 号 p. 11-17
発行日: 1987年
公開日: 2010/08/25
ジャーナル フリーRecently, most of CG (computer graphics) have been changing from methods of vector scan graphics which are represented with lines, to methods of luster scan graphics with surfaces. The latter methods represent objects as being in the state of natural hue, therefore we need a high resolutional full-colored CRT and computer in order to display natural pictures. They are composed of, for example, a CRT, a large scale flame buffer where millions of colors are displayed, algorithm and processing of hardwares. So lots of beautiful pictures are published, which are drawn with specific machines and super computers. On the other hand, it can be said in using a micro computer that (1) the executing CG consumes much time, (2) the pixels are coarser to display CG, and (3) the number of colors is fewer than that in the above methods. We, however, can get quite beautiful pictures if we spend more time and efforts.
In this study, we tried successfully to use the specified Z-buffer method that is one of the luster scan graphics methods. In addition, special semi-transparent and shadowing techniques are introduced to display more beautiful are natural images as its advanced applications with the low priced hardwares.抄録全体を表示PDF形式でダウンロード (3518K) -
辻合 秀一, 曽我 真人, 中谷 吉次, 長江 貞彦1987 年 21 巻 2 号 p. 19-24
発行日: 1987年
公開日: 2010/08/25
ジャーナル フリーPDF形式でダウンロード (1390K) -
立花 徹美1987 年 21 巻 2 号 p. 25-32
発行日: 1987年
公開日: 2010/08/25
ジャーナル フリーPDF形式でダウンロード (548K) -
小山 清男1987 年 21 巻 2 号 p. 33-40
発行日: 1987年
公開日: 2010/08/25
ジャーナル フリーPDF形式でダウンロード (8462K) -
1987 年 21 巻 2 号 p. 41-54
発行日: 1987年
公開日: 2010/08/25
ジャーナル フリーPDF形式でダウンロード (3140K)
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