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    An Analysis of Modeling Clip

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    EUROGRAPHICS_89pp367_379.pdf (311.5Kb)
    Date
    1989
    Author
    O Bara, Robert M.
    Abi-Ezzi, Salim
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    Abstract
    Modeling clip gives an application the ability to remove sections of an object in order to view internal detail. The clipping volume defied by modeling clip can be concave and disjoint, and is composed of a set of volumes that are specified in modeling coordinates. The modeling clip functionality has been included in the PHIGS specification [4], Some interesting peculiarities arise from the fact that most graphics pipelines (such as PHIGS) are algebraically based and that modeling clip regions are specified in modeling coordinates. One such peculiarity occurs when the transformation relating the coordinate system of the clip region to world coordinates is singular. A study on the algorithmic and architectural issues of implementing modeling clip is presented. The resulting algorithm to implement the modeling clip mechanism represents the clip volume as a pipeline of filters with each filter representing one of the sub-volumes. The method handles all of the sixteen possible set combinations between two regions in space. The effects of transformations on modeling clip have been examined, and has resulted in identifying when modeling clip can be efficiently performed in device coordinates as well as the cases when it can not. When handling singular modeling transformations, it is shown that it i
    BibTeX
    @inproceedings {10.2312:egtp.19891027,
    booktitle = {EG 1989-Technical Papers},
    editor = {},
    title = {{An Analysis of Modeling Clip}},
    author = {O Bara, Robert M. and Abi-Ezzi, Salim},
    year = {1989},
    publisher = {Eurographics Association},
    ISSN = {1017-4656},
    DOI = {10.2312/egtp.19891027}
    }
    URI
    http://dx.doi.org/10.2312/egtp.19891027
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    • EG1989 Proceedings (Technical Papers)
    • EG1989 Proceedings (Technical Papers)

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