Journal of Graphic Science of Japan
Online ISSN : 1884-6106
Print ISSN : 0387-5512
ISSN-L : 0387-5512
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Volume 20, Issue 1
Displaying 1-6 of 6 articles from this issue
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  • On Constructive Method and Its Applications for Solid Models Applied to the Descriptive Geometry (1)
    Takao MIYAMOTO, Sadahiko NAGAE, Setsuo FUKUNAGA
    1986 Volume 20 Issue 1 Pages 1-8
    Published: 1986
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.20.1
    JOURNAL FREE ACCESS
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    Fixing our eyes on the personal usage of the recent micro-computers, which have been remarkably developed one of these days, some applications on the Descriptive Geometry are presented in this paper. For example, intersecting bodies are colorfully displayed on the computer image which shows their shade and shadow by using the ray tracing method for the solid bodies. The results show that the usage of micro-computer is effective to solve some problems on Descriptive Geometry and it is a good tool to understand the shapes and construction of 3-D objects.
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  • CONSTRUCTION OF SURFACE MODEL, AND ITS APPLICATION FOR CAD/CAM WIH PERSONAL COMPUTER (1)
    Reiji TSURUNO, Sadahiko NAGAE, Setsuo FUKUNAGA
    1986 Volume 20 Issue 1 Pages 9-14
    Published: 1986
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.20.9
    JOURNAL FREE ACCESS
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    Recent development for personal computers in, not only hardware but also software has been remarkably improved. The application for 3-Dimentional object become more and more popular in the usage of the personal computers one of these days. However, the realtime data input or 3-D transaction with free curved surface are not so popular yet because of its indicated and enormous surface data.
    This paper makes the surface data volume compact and reduce its lead time with the method inputting surface data by sampling of surface points and reconstruction of 3-D surface model. Some experimental results show that the method is effective and the precision is satisfactory in the reconstraction of the real objects.
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  • A Method of Construction of Perspective Drawing by Projective Mapping— (2)
    Naoki ODAKA
    1986 Volume 20 Issue 1 Pages 15-22
    Published: 1986
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.20.15
    JOURNAL FREE ACCESS
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    On a plane, properly arranging a pair of plan and elevation of a solid figure, projecting those figures respectively on proper two lines from two points and furthermore projecting those images from other two, points, perspective drawing of the original solid figure can be constructed by intersection of corresponding projector. This paper presents the theory of this new method of obtaining perspective drawing and its applications and elucidates the relation of two parallel coordinate systems which keep images on line constant and between the arrangement of plan and elevation and the center of projection, and also shows that this method is an extension of Einschneideverfahren in parallel axonometric drawing and that it is easy to obtain perspective drawing without any technical knowledge if the arrangement of plan and elevation and the center of projection is previously given.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1986 Volume 20 Issue 1 Pages 23-32
    Published: 1986
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.20.23
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1986 Volume 20 Issue 1 Pages 33-34
    Published: 1986
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.20.33
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1986 Volume 20 Issue 1 Pages 35-36
    Published: 1986
    Released on J-STAGE: August 25, 2010
    DOIhttps://doi.org/10.5989/jsgs.20.35
    JOURNAL FREE ACCESS
    Download PDF (217K)
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