Re: levels of details

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Jim Helman (jimh++at++surreal)
Sun, 21 May 95 22:05:48 -0700

Note that Performer itself does not (yet!) do any
simplification of model geometry. Performer relies on the
modeler to have provided multiresolution models of the
object. Vis sim modelers like Coryphaues DWB and Multigen
have LOD construction tools. I believe that one of
Wavefront's modelers also has some interactive model
simplification capabilities.

Simplyfing patch-based models is pretty straightforward down
to around the scale of the patches, i.e. just retessellate.
Polygonal data is harder to deal with. Some research has
been done on automatically generating simpler models from
polygonal data. I've listed some of the articles below.
Also, although I don't have references, Michael Garland and
Paul Heckbert are doing some work in the area as well.

rgds,

-jim helman

jimh++at++surreal.asd.sgi.com
415/390-1151

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        AUTHOR = "Hughes Hoppe and Tony DeRose and Tom DuChamp and
                John McDonald and Werner Stuetzle",
        TITLE = "Mesh optimization",
        BOOKTITLE = "SIGGRAPH 93 Conference Proceedings (Computer Graphics,
                        Annual Conference Series 1993)",
        MONTH = Aug,
        YEAR = 1993,
        PAGES = "19-26"}

++at++INPROCEEDINGS{Hopp94a,
        AUTHOR = "Hughes Hoppe and Tony DeRose and Tom DuChamp and M. Halstead and
                H. Jin and John McDonald and J. Schweitzer and Werner Stuetzle",
        TITLE = "Piecewise smooth surface reconstruction",
        BOOKTITLE = "SIGGRAPH 94 Conference Proceedings (Computer Graphics,
                        Annual Conference Series 1994)",
        MONTH = Jul,
        YEAR = 1994,
        PAGES = "19-26"}

++at++INPROCEEDINGS{Maci95a,
        AUTHOR = "Paulo W. C. Maciel and Peter Shirley",
        TITLE = "Visual Navigation of Large Environments Using Textured Clusters",
        BOOKTITLE = "Proceedings 1995 Symposium on Interactive 3D Graphics",
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        YEAR = 1995,
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++at++INPROCEEDINGS{Ross93a,
        AUTHOR = "Jarek Rossignac and P. Borrel",
        BOOKTITLE = "Second Conference on Geometric Modelling in Computer
                       Graphics",
        TITLE = "Multi-resolution 3{D} approximation for rendering
                       complex scenes",
        PAGES = "453--465",
        MONTH = jun,
        YEAR = "1993",
        NOTE = "Genova, Italy",
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++at++INPROCEEDINGS{Schr93a,
        AUTHOR = "William J. Schroeder, Jonathan A. Zarge, William E. Lorensen",
        TITLE = "Decimation of Triangle Meshes",
        BOOKTITLE = "SIGGRAPH 93 Conference Proceedings (Computer Graphics,
                        Annual Conference Series 1993)",
        MONTH = Aug,
        YEAR = 1993,
        PAGES = "65-70"}

++at++ARTICLE{Turk92a,
        AUTHOR = "Greg Turk",
        TITLE = "Re-Tiling Polygonal Surfaces",
        JOURNAL = "Computer Graphics (Proceedings SIGGRAPH '92)",
        VOLUME = 26,
        NUMBER = 2,
        MONTH = Aug,
        YEAR = 1992,
        PAGES = "55-64" }

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