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  Implicit Modelling Research

First iso-surface polygonizer 1986: published as Data structures for Soft Objects: Click for pdf.

Some recent work on implicit surfaces has been done in collaboration with Marie-Paule Cani (Grenoble) and Loic Barthe (Toulouse). Other work on art and design with Neil Dodgson (Cambridge). Also check the home pages of the UVic Graphics Lab. students who participate in this research.  The papers are sorted by year. Click on the appropriate reference to download the pdf version of the paper.
 

Links :  1999, 1998, 1997, 1996, 1995, 1994
List of all published papers and research reports. dog

Also early animation of implicit models paper Animating

dra

Efficient data-parallel tree-traversal for BlobTrees
Herbert Grasberger and Jean-Luc Duprat and Brian Wyvill and Paul Lalonde and Jarek Rossignac
Computer Aided Design, 2016, issn 0010-5586.
Also presented at SIAM Conference on Geometric and Physical Modeling.
[PDF] [BIBTEX]

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Average curve of smooth planar curves
Mukul Sati and Jarek Rossignac and Raimund Seidel and Brian Wyvill and Suraj Musuvathy
Computer Aided Design, 2016, issn 0010-4485.
Also presented at SIAM Conference on Geometric and Physical Modeling.
[PDF] [BIBTEX]

dra

Obstacle Detection for Image-Guided Surface Water Navigation
T. Sadhu, A. B. Albu, M. Hoeberechts, Wisernig E., and B. Wyvill
Proc. 2016 13th Conference on Computer and Robot Vision (CRV), Visualization, and Imaging pp 45-52, DOI 10.1109/CRV.2016.34, June 2016.
[PDF] [bibtex]

dra

Composition and Perception beyond Photorealism
Ji, Li, Brian Wyvill, Lynda Gammon, and Amy Gooch.
Proc. ACM/Eurographics Expressive 2016, Computational Aesthetics in Graphics, Visualization, and Imaging.
(Bridging Papers), ISBN = {978-3-03868-021-5}, DOI = {10.2312/exp.20161261}, Lisbon May 2016
[PDF] [bibtex]

dra

Painting with Flowsnakes
Brian Wyvill
Proc. ACM/Eurographics Expressive 2015, Computational Aesthetics in Graphics, Visualization, and Imaging pp 63--74,
[PDF] [video] [bibtex]

dra

A Survey on Implicit Surface Polygonization
de Araujo, B. R. and Lopes, Daniel S. and Jepp, Pauline and Jorge, Joaquim A. and Brian Wyvill
ACM Comput. Surv. 2015, vo. 47, no. 4, pp 60:1--60:39,
[PDF] [bibtex]

dra

Rendering Artistic Light Patterns
Ji, L. and Gooch, A. and Gammon, L. and Wyvill, B.
Proc. ACM/Eurographics Expressive 2015, Computational Aesthetics in Graphics, Visualization, and Imaging pp 1--13,
[PDF] [bibtex]

dra

Augmented Reality Visualization for Sailboats
Eduard Wisernig, Tanmana Sadhuyz, Catlin Zilinski, Brian Wyvill, Alexandra Branzan Albu
Proc. CyberWorlds 2015, Visby Sweden, October 2015
[PDF] [bibtex]

dra

Robust Iso-Surface Tracking for Interactive Character Skinning
Rodolphe Valiant, Loic Barthe, Gael Guennebaud, Marie-Paule Cani, Brian Wyvill
ACM Transactions Siggraph Asia 2014, 32(4)
[PDF]

dra

Implicit Decals: Interactive Editing of Repetitive Patterns on Surfaces
de Groot, E., Wyvill, B., Barthe, L., Nasri, A and Lalonde, P
Computer Graphics Forum, 33(1), pp141--151, 2014
[PDF]

dra

Implicit Skinning: Real-Time Skin Deformation with Contact Modeling
Rodolphe Valiant, Loic Barthe, Gael Guennebaud, Marie-Paule Cani, Damien Rohmer, Brian Wyvill, Oliver Gourmel, Mathias Paulin
ACM Transactions Siggraph 2013, 32(4), pp125:1--125:12, 2013
[PDF]

dra

A Gradient-Based Implicit Blend
Olivier Gourmel, Loic Barthe, Marie-Paule Cani, Brian Wyvill, Adrien Bernhardt, Mathias Paulin and Herbert Grasberger
ACM Transactions on Graphics ACM Transactions, 32(2), pp12:1--12:12, 2013
[PDF]

dra

A Data-Efficient Collaborative Modelling Method using Websockets and the BlobTree for Over-the Air Networks
Herbert Grasberger, Pourya Shirazian, Brian Wyvill, and Saul Greenberg
Proceedings of the 18th International Conference on 3D Web Technology
ISBN 978-1-4503-2133-4, pp 29-37, Published by ACM, 2013
[PDF]

dra

Determining an Aesthetic Inscribed Curve
B. Wyvill, P. Kry, R. Seidel and D. Mould
Proc. Computational Aesthetics in Graphics, Visualization, and Imaging, pp 63--70,
Published by Eurographics. D. Cunningham and D. House (Editors) 2012
[PDF]

dra

Polygonization of implicit surfaces on Multi-Core Architectures with SIMD instructions
P. Shirazian, B. Wyvill and J.L. Duprat
Eurographics Symposium on Parallel Graphics and Visualization (EGPGV), pp 89--98,
Published by Eurographics. H. Childs and T. Kuhlen (Editors) 2012
[PDF]

ShapeShop: Free-Form 3D Design with Implicit Solid Modeling
Ryan Schmidt and Brian Wyvill
In "Sketch-based Interfaces and Modeling" J. Jorge, F. Samavati (eds.),
Published by Springer, Research Monograph, pp 287–311, 2011.
[PDF]

dra

Aesthetic Agents: Swarm-based Non-photorealistic Rendering using Multiple Images
J. Love, P. Pasquier, B. Wyvill, S.Gibson and G. Tzanetakis
Proc. Computational Aesthetics in Graphics, Visualization, and Imaging, pp 47--54,
Published by Eurographics. A. Wanner and A. Bevans (Editors) 2011
[PDF]

Implicit Blending Revisited
Bernhardt Adrien, Barthe Loïc, Cani Marie-Paule, Wyvill Brian
Comput. Graph. Forum, 29 (2), 367–375, 2010.
[PDF] see also

dra

Recursive Scene Graphs for Art and Design
Brian Wyvill and Neil Dodgson
Proc. Computational Aesthetics in Graphics, Visualization, and Imaging, pp 23-31,
Published by Eurographics. O. Deussen and P. Jepp (Editors) 2010.
[PDF]

smi WarpCurves: A Tool for Explicit Manipulation of Implicit Surfaces
Masamichi Sugihara, Brian Wyvill and Ryan Schmidt
SMI 2010. slected for special issue of Computers And Graphics, vol , no. , pp
June 2010,
[PDF] see also
smi Precise Construction and Control of Implicit Fillets in the BlobTree
Herbert Grasberger, Andrea Weidlich, Alexander Wilkie and Brian Wyvill
SMI 2010.ISBN: 978-0-7695-4072-6, pp 151--162
June 2010,
[PDF]
vase Locally Restricted Blending of BlobTrees
Erwin de Groot, Brian Wyvill, Huub van de Wetering
Computers And Graphics, vol 33, no. 6, pp 690--697
Dec 2009,
[PDF]
flowsnake

Automatically Mimicking Unique Hand Drawn Pencil Lines
Zainab Meraj, Brian Wyvill, Tobias Isenberg, Amy Gooch, Richard Guy
Computers And Graphics (accepted)
An earlier version of this paper was published as Proc. Computational Aesthetics 2008
June 2009,
[PDF]

octo A Sketch-Based Method to Control Deformation in a Skeletal Implicit Surface Modeler (2008).
Masamichi Sugihara, Erwin de Groot, Brian Wyvill, Ryan Schmidt.
5th Eurographics Workshop on Sketch-Based Interfaces and Modeling. [Project] [PDF]
sil Polygonal Silhouette Error Correction: A Reverse Subdivision Approach, Kevin Foster, Mario Costa Sousa, Faramarz F. Samavati and Brian Wyvill, International Journal of Computational Science and Engineering, Vol. 3, No. 1, pp. 53-70, 2007. [PDF]
friut Improving the Sketch-Based Interface: Forming Curves from Many Small Strokes
Pusch, R., Samavati, F.F., Nasri, A., and Wyvill, B.
The Visual Computer, Vol. 23, No. 9-11, 2007.

[PDF]
barn Mimicking Hand Drawn Pencil Lines
Zainab Meraj, Brian Wyvill, Tobias Isenberg, Amy Gooch, Richard Guy
Proc. Computational Aesthetics 2008
June 2008, 73-- 80.
[PDF]
scaff Sketching, Scaffolding, and Inking: A Visual History for Interactive 3D Modeling (2007)
Ryan Schmidt, Tobias Isenberg, Pauline Jepp, Karan Singh, Brian Wyvill.
Proceedings of NPAR 2007, pp. 23-32.
[PDF] [PDF Slides] [Details]
dog Interactive Decal Compositing with Discrete Exponential Maps (2006).
Ryan Schmidt, Cindy Grimm, Brian Wyvill.
ACM Transactions on Graphics (SIGGRAPH 2006), 25(3), July 2006, pp. 605-613.
[PDF] [Video] [Figures] [Project] [Tech Report] [Demo+Source]
ShapeShop: Sketch-Based Solid Modeling with BlobTrees (2005)
Ryan Schmidt, Brian Wyvill, Mario Costa Sousa, Joaquim A. Jorge.
2nd Eurographics Workshop on Sketch-Based Interfaces and Modeling, pp. 53-62.
[PDF] [Figures] [PDF Slides] [Powerpoint Slides w/ Videos] [Project]
Sketch-Based Modeling with the BlobTree (2005).
Ryan Schmidt, Brian Wyvill, Mario Costa Sousa.
ACM SIGGRAPH 2005, Technical Sketch.
[PDF] [Figures] [Video] [PDF Slides] [Project]
medusa
Interactive Implicit Modeling with Hierarchical Spatial Caching (2005).
Ryan Schmidt, Brian Wyvill, Eric Galin.
Proceedings of Shape Modeling International 2005, pp. 104 - 113.
[PDF] [PDF Slides] [Tech Report ]
train Pen-and-Ink for BlobTree Implicit Models
Kevin Foster, Pauline Jepp, Brian Wyvill, Mario Costa Sousa, Callum Galbraith, Joaquim A. Jorge
Computer Graphics Forum (Proc. of Eurographics 2005)
24(3) (2005), 267 -- 276.
dragon Sketch Based Construction and Rendering of Implicit Models (2005).
Brian Wyvill, Kevin Foster, Pauline Jepp, Ryan Schmidt, Mario Costa Sousa, Joaquim A. Jorge.
1st Eurographics Workshop on Computational Aesthetics in Graphics, Visualization and Imaging. [PDF]
rocket Generalized Sweep Templates for Implicit Modeling (2005).
Ryan Schmidt, Brian Wyvill.
Proeedings of GRAPHITE 2005, pp. 187-196.
[PDF]
face Precise Ink Drawing of 3D Models
Mario Costa Sousa, Kevin Foster, Brian Wyvill,  Faramarz Samavati, Special issue of Computer Graphic Forum, Vol.22, No.3, 2003.   [PDF]

 




  • Reverse Subdivision Multiresolution for Polygonal Silhouette Error Correction
    Kevin Foster, Mario Costa Sousa, Faramarz Samavati and Brian Wyvill
    International Journal of Computational Science and Engineering (IJCSE)
    (Journal version of CGA 2004 paper)

  • Sketch Based Construction and Rendering of Implicit Models
    Brian Wyvill, Kevin Foster, Pauline Jepp,Ryan Schmidt, Mario Costa Sousa, Joaquim A. Jorge
    1st EG Workshop on Computational Aesthetics in Graphics, Visualization and Imaging, Girona, Spain May,2005

  • Sketch Based Modeling with the Blob Tree
    Ryan Schmidt,Brian Wyvill,Mario Costa Sousa
    ACM Siggraph 2005 Sketch presentation, August,2005
  • Interactive Modelling with Implicit Sweep Surfaces, Ryan Schmidt and Brian Wyvill,
    ACM International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia � Graphite, Dunedin, New Zealand, 2005

  • Rayskip: Faster Ray Tracing of Implicit Surface Animations, Erwin de Groot and Brian Wyvill,
    ACM International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia � Graphite, Dunedin, New Zealand, 2005

  • 2004
    Journal Articles


    @ARTICLE{callum:eg04,
        TITLE    = "{Implicit Visualization and Inverse Modeling of Growing Trees }",
        AUTHOR    = "Callum Galbraith and Lars Mundermann and Brian Wyvill",
           notes = "Special issue: Proceedings of EuroGraphics 2004",
           journal = "Computer Graphics Forum ",
            VOLUME = "23",
            NUMBER = "3",
            pages =  "337-348",
            YEAR = {2004}
           }

    @ARTICLE{mahovsky:plu04,
        TITLE    = "{ Fast Ray-Axis Aligned Bounding Box Overlap Tests With Plucker Coordinates }",
        AUTHOR    = "Jeffrey Mahovsky and Brian Wyvill",
            JOURNAL = "The Journal of Graphics Tools",
            Publisher = "AK Peters Ltd, Wellesley, Mass",
            VOLUME = "9",
            NUMBER = "1",
            pages =  "37-48",
            YEAR = {2004}
           }

    @ARTICLE{kees:shrinkwrap04,
        TITLE    = "{Shrinkwrap: An efficient adaptive algorithm for triangulating an iso-surface }",
        AUTHOR    = "Kees van Overveld and Brian Wyvill",
         VOLUME = "20",
            NUMBER = "6",
            pages =  "362-369",
           journal = "The Visual Computer",
           Publisher = "Published by Springer Verlag",
           year = {2004}
           }

    @article{Barthe:IJSM2004,
      author = "L. Barthe and Brian Wyvill and Erwin DeGroot",
      title = "Binary CSG Operators For Soft-Objects",
      journal = "International Journal Shape Modelling",
      PUBLISHER = "World Scientific Publishing",
      NOTE = "accepted",
      YEAR = {2004}
    }

    Conference Papers


    @ARTICLE{wyvill:2004,
            AUTHOR = "Brian Wyvill and Kees van Overveld and Sheelagh Carpendale",
            TITLE = "{Creating Cracks for Batik Renderings}",
            JOURNAL = "NPAR 2004 Proceedings of the third international symposium on Non-photorealistic animation and rendering",
        PUBLISHER = "ACM SIGGRAPH and Eurographics",
            pages =  "61-70",
        YEAR = {2004}
    }

    @ARTICLE{callum:blobtree04,
        TITLE    = "BlobTree Tree ",
        AUTHOR    = "Callum Galbraith and Peter MacMurchy and Brian Wyvill",
            JOURNAL = "Proc. Computer Graphics International '04",
        PUBLISHER = "IEEE Computer Society",
            pages = "78-85",
            YEAR = {2004}
           }

    @article{Fosterk:04,
    Author =
    "Kevin Fostr and Mario Costa-Sousa and Faramarz F. Samavati and Brian Wyvill",
    Title = "Reverse Subdivision Multiresolution for Polygonal Silhouette Error Correction",
    Journal = "ICCSA2004Lecture Notes in Computer Science",
    number =  "3045",
    pages =  "247-256",
    year = { 2004}
    }


    Submitted Journal Articles

    @article{mahovskybv:04,
      author = "Jeffrey Mahovsky and Brian Wyvill",
      title = "Memory Conserving Bounding Volume Hierarchies with Coherent Ray Tracing",
      journal = "IEEE Transactions on Visualization and Computer Graphics (submitted)",
      YEAR = {2004}
    }

    @article{degroot:04,
      author = "Erwin de Groot and Brian Wyvill and Huub van der Wettering ",
      title = "Better Blending Between Multiple Nodes of the BlobTree",
      journal = "International Journal of Shape Modelling (submitted)",
      note = "submitted",
      YEAR = {2004}
    }

    @article{Robson2004,
      author = "Lemos, R. R. and Epstein and M.; Herzog, W.and  Wyvill, B.",
      title = "A framework for structured modeling of skeletal muscle",
      journal = "Computer Methods in Biomechanics and Biomedical Engineering",
      PUBLISHER = "Taylor & Francis",
      NOTE = "accepted, August 2004",
      YEAR = {2004}
    }


     2003
    Journal Articles

      @article{Barthe:2003:TPF,
      author = "L. Barthe and N. A. Dodgson and M. A. Sabin and B.Wyvill and V. Gaildrat",
      title = "Two-dimensional Potential Fields for Advanced Implicit Modeling Operators",
      year = "2003",
      month = mar,
      journal = "Computer Graphics Forum",
      volume = "22",
      number = "1",
      pages = "23--33",
    }

    @ARTICLE{mario:ink03,
        TITLE    = "{ Precise Ink Drawing of 3D Models }",
        AUTHOR    = "Mario Costa Sousa and Kevin Foster and Brian Wyvill and Faramarz Samavati",
           notes = "Special issue: Proceedings of EuroGraphics 2003",
           journal = "Computer Graphics Forum ",
            VOLUME = "22",
            NUMBER = "3",
            pages =  "369-379",
            YEAR = {2003}
           }

    Conference Papers

    @INPROCEEDINGS{Samavati:2003,
     AUTHOR = "F. F. Samavati and M. Ali Nur and R. Bartels and B. Wyvill ",
     TITLE = "Progressive Curve Representation Based on Reverse Subdivision.",
     BOOKTITLE = "The 2003 International Conference on Computational Science and Its Applications, Montreal, Canada",
     ORGANIZATION = "Published by Springer Verlag",
     MONTH = "May",
     YEAR = {2003}
    }

    @INPROCEEDINGS{Lemos:2003,
      AUTHOR = "R. Lemos and M. Epstein and W. Herzog and Y. Kawakami and T. Kurihara T. and B. Wyvill",
           TITLE = "Modeling the Mechanical Behaviour of Skeletal Muscle at different structural levels using a Continuum Approach.",
     BOOKTITLE = "Proceedings of the World Congress on medical physics and Biomedical engineering. Sydney, Australia",
     ORGANIZATION = "International Federation for Medical and Biological Engineering",
     MONTH = "August ",
     YEAR = {2003}
    }

    @TECHREPORT{Liang:2003,
            AUTHOR = "Xikun Liang and Brian Wyvill",
            TITLE = "{A General Framework for Implicit Modeling}",
            JOURNAL = "Research Report No. 2003-717-20",
        YEAR = {2003}
    }

    @TECHREPORT{wyvill:2003,
            AUTHOR = "Brian Wyvill and Kees van Overveld and Sheelagh Carpendale",
            TITLE = "{Visualizing Batik}",
            JOURNAL = "Research Report No. 2002-701-04",
        YEAR = {2002}
    }


    2002
     



    @ARTICLE{Callum:2002,
           author = "Callum Galbraith and Przemyslaw Prusinkiewicz and Brian Wyvill",
           title = "Modeling a Murex cabritii sea shell with a structured implicit surface modeler",
           year = "2002",
           journal = "The Visual Computer",
           volume = "18",
           number = "2",
           pages = "70--80",
           }



    @ARTICLE{Galbraith:2002,
            AUTHOR = "Callum Galbraith and Mai Ali Nur and Brian Wyvill",
            TITLE = "{Data Structures for Animating Implicit Surfaces}",
            JOURNAL = "Proc. Graphics Interface",
            NOTES = "Submitted",
        YEAR = {2002},
        MONTH = "May",
    }

    @ARTICLE{Hickey:2002,
            AUTHOR = "Craig Hickey and Christian Jacob and Brian Wyvill",
            TITLE = "{Evolution of a Neural Network for Gait Animation}",
            JOURNAL = "Proc.IASTED International Conference on Artificial Intelligence and Soft Computing (ASC 2002)",
        YEAR = {2002},
        MONTH = "July",
    }

    @INPROCEEDINGS{Lemos:2002,
      AUTHOR = "R. Lemos and M. Epstein and W. Herzog and B. Wyvill",
           TITLE = "Modeling and Visualization of the Mechanical Behaviour of Skeletal Muscle using a Continuum Approach. Proceedings CD of IV World Congress Biomechanics."
     BOOKTITLE = "Proceeding of the 4th World Congress on Biomechanics, Calgary, Canada",
     PAGES = "192-199",
     ORGANIZATION = "Canadian Society of Biomechanics",
     MONTH = "August ",
     YEAR = {2002}
    }

    @ARTICLE{Wyvill:course02,
        AUTHOR = "Brian Wyvill and David Ebert and Markus Gross",
        TITLE = "{Course Notes}",
        JOURNAL = "SIGGRAPH '2002, Course \#41, Non-Traditional Modeling",
        YEAR = {2002}
    }

    2001
    Coming Soon !@INPROCEEDINGS{Lemos:2001,
     AUTHOR = "R. Lemos and M. Epstein and W. Herzog and B. Wyvill",
     TITLE = "Realistic Skeletal Muscle Deformation using Finite Element
    Analysis",
     BOOKTITLE = "Proceeding of the 14th Brazilian Symposium on Computer
    Graphics and Image Processing. Florianopolis, Brazil",
     PAGES = "192-199",
     ORGANIZATION = "IEEE Computer Society",
     MONTH = "October",
     YEAR = {2001}
    }

    @ARTICLE{Liang:refine2001,
            AUTHOR = "X.K. Liang and Brian Wyvill",
            TITLE = "Hierarchical Implicit Surface Refinement",
            JOURNAL = "Proc. Computer Graphics International, Hong Kong",
            PAGES = {291-298},
        PUBLISHER = "IEEE Computer Society",
            YEAR = {2001}
    }

    @ARTICLE{Mai:2001,
            AUTHOR = "Mai Ali Nur and Kevin Liang and Brian Wyvill and George Bourne",
            TITLE =  "Animating the Escape Response of the Sea Anemone, Stomphia coccinea from the Starfish, Dermasterias imbricata Modeled Using Implicit Surfaces",
            JOURNAL = "Proc. Computer Graphics International, Hong Kong",
            PAGES = {81-88},
        PUBLISHER = "IEEE Computer Society",
            YEAR = {2001}
    }

    @ARTICLE{Liang:2001a,
            AUTHOR = "Kevin Liang and Mai Ali Nur and Brian Wyvill",
            TITLE = "Modelling the Structure of the Sea Anemone and the Sea Star Using Hierarchical Implicit Surfaces",
            JOURNAL = "Proc. Pacific Graphics, Tokyo",
        PAGES = {265-274},
        NOTES = "In Press",
        PUBLISHER = "IEEE Computer Society",
            YEAR = {2001}
    }

    @ARTICLE {Lemos:2001a,
            AUTHOR = "Robson Lemos and Marcelo Epstein and Walter Herzog and Brian Wyvill",
            TITLE = "{ Simulation of a Three-dimensional Geometric Model of Skeletal Muscle using the Finite Element Method}",
            JOURNAL = "Proc. International Society of Biomechanics - XVIII Congress, Zurich, Switzerland",
            PAGES = "23",
        YEAR = {2001},
        MONTH = "JULY",
    }

    @ARTICLE {FoxJBT:2001,
            AUTHOR = "Mark Fox and Callum Galbraith and Brian Wyvill",
            TITLE = "{Efficient Implementation of the BlobTree for Rendering Purposes}",
            JOURNAL = "Proc. Shape Modelling International, Genova, Italy",
        PUBLISHER = "IEEE",
        YEAR = {2001},
        MONTH = "May",
    }

    @ARTICLE {Lemos:2001b,
            AUTHOR = "Robson Lemos and Marcelo Epstein and Walter Herzog and Brian Wyvill",
            TITLE = "{A Proposal for Geometric Skeletal Muscle Deformation using the Finite Element Analysis}",
            JOURNAL = "Proc. Twelfth Western Computer Graphics Symposium",
        PUBLISHER = "Washington State University",
            PAGE = "89-97",
        YEAR = {2001},
        MONTH = "March",
    }


    @ARTICLE{Robson:2000,
       AUTHOR="Robson Lemos and  Walter Herzog and Brian Wyvill",
       TITLE = "Three-Dimensional Geometric Model of Skeletal Muscle",
       JOURNAL = "Skeletal Muscle Mechanics: From Mechanisms to Function, Walter Herzog (Ed.) ",
       PUBLISHER = "John Wiley and Sons",
       PAGE = {179-205},
       YEAR = {2000}
    }  

    2000

    @ARTICLE{Mai:2000,
     AUTHOR = "Mai Ali Nur  and Kevin Liang and Brian Wyvill and George Bourne",
     TITLE = "Animating the Escape Response of Stomphia coccinea from Dermasterias imbricata Modeled Using Implicit Surfaces",
    JOURNAL = "University of Calgary, Dept. of Computer Science, Research Report 2001-679-02",
     YEAR = {2000}

    @ARTICLE{Liang:2000,
     AUTHOR = "Kevin Liang and Mai Ali Nur and Brian Wyvill",
     TITLE = "Modelling the Structure of the Sea Anemone, Stompia Coccinea and the Sea Star, Dermasterias Imbricata Using Implicit Surfaces",
    JOURNAL = "University of Calgary, Dept. of Computer Science, Research Report 2000-672-24",
     YEAR = {2000}

    @ARTICLE{Wyvill:sub2000,
     AUTHOR = "Brian Wyvill and Pauline Jepp and Kees van Overveld and Geoff Wyvill",
     TITLE = "Subdivision Surfaces for Fast Approximate Implicit Polygonization",
    JOURNAL = "University of Calgary, Dept. of Computer Science, Research Report 2000-671-23",
     YEAR = {2000}

    @ARTICLE{Liang:refine2000,
     AUTHOR = "X.K. Liang and Brian Wyvill",
     TITLE = "Hierarchical Modelling of the BlobTree with Primitive Based Local Refinement",
    JOURNAL = "University of Calgary, Dept. of Computer Science, Research Report 2000-673-25",
     YEAR = {2000}

    @ARTICLE{Callum:2000,
     AUTHOR = "Callum Galbraith and Przemek Prusinkiewicz and Brian Wyvill",
     TITLE = "Modeling Murex cabritii Seashell with a Structured Implicit Surface Mod
    eler ",
     JOURNAL = "Proc. CG International 2000",
     PUBLISHER = "IEEE Computer Society",
     YEAR = {2000}
    }

    @ARTICLE{Tigges:2000,
     AUTHOR = "Mark Tigges and Brian Wyvill",
      Title  = "Python for Scene and Model Description for Computer Graphics",
     JOURNAL = "Proc. IPC 2000",
     MONTH = "January",
      YEAR = {2000}
    }

    @ARTICLE{WyvillUncertainty:2000,
     AUTHOR = "Geoff Wyvill and Brian Wyvill",
     TITLE = "Illustrating Uncertainty",
     NOTES = "Siggraph 2000 Sketch",
     JOURNAL = "ACM Siggraph 2000 presentation",
     PUBLISHER = "ACM",
     YEAR = {2000}
    }

    @ARTICLE{WyvillBlend:2000,
     AUTHOR = "Brian Wyvill and Geoff Wyvill",
     TITLE = "Better Blending of implicit objects at different scales.",
     NOTES = "Siggraph 2000 Sketch",
     JOURNAL = "ACM Siggraph 2000 presentation",
     PUBLISHER = "ACM",
            YEAR = {2000}
    }

    1999
    @ARTICLE{Tigges:99a,
    {
     AUTHOR = "Mark Tigges and Brian Wyvill",
     TITLE = "A Field Interpolated Texture Mapping Algorithm for Skeletal Implicit Surfaces",
     PAGES = {25-33},
     JOURNAL = "Proc. CG International 99",
     PUBLISHER = "IEEE Computer Society ISBN: 0-7695-0185-0",
     YEAR = {1999}
    }

    @ARTICLE{Tigges:99b,
    {
     AUTHOR = "Mark Tigges and Sheelagh Carpendale and Brian Wyvill",
     TITLE = "Alternate Distance Metrics for Implicit Surface Modeling",
     JOURNAL = "Graphics Interface 1999 Poster Session,Kingston Canada. ",
     MONTH = "June"
     YEAR = {1999}
    }

    @ARTICLE {Wyvill99a,
    {
    AUTHOR = "Kees van Overveld and Mark Tigges and Brian Wyvill",
    TITLE = "{Soft Shadows for Soft Objects}",
    JOURNAL = "Implicit Surfaces,Proceedings of Fourth Eurographics Workshop on Implicit Surfaces, Bordeaux, France. ", 
    NOTE = "Sponsored by ACM and Eurographics",
    VOLUME = "4",
    YEAR = {1999},
    MONTH = "September",
    }

    @ARTICLE {Wyvill99,
    {
    AUTHOR = "Brian Wyvill and Eric Galin and Andrew Guy",
    TITLE = "{Extending The CSG Tree. Warping, Blending and Boolean Operations in an Implicit Surface Modeling System}",
    JOURNAL = "Computer Graphics Forum",
    VOLUME = "18",
    NUMBER = "2",
    PAGES =  "149--158",
    YEAR = {1999},
    MONTH = "June",
    }

    1998

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