Generic Graph Grammar: A Simple Grammar for Generic Procedural Modelling

Asger Nyman Christiansen, Jakob Andreas Bærentzen

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    Abstract

    Methods for procedural modelling tend to be designed either for organic objects, which are described well by skeletal structures, or for man-made objects, which are described well by surface primitives. Procedural methods, which allow for modelling of both kinds of objects, are few and usually of greater complexity. Consequently, there is a need for a simple, general method which is capable of generating both types of objects. Generic Graph Grammar has been developed to address this need. The production rules consist of a small set of basic productions which are applied directly onto primitives in a directed cyclic graph. Furthermore, the basic productions are chosen such that Generic Graph Grammar seamlessly combines the capabilities of L-systems to imitate biological growth (to model trees, animals, etc.) and those of split grammars to design structured objects (chairs, houses, etc.). This results in a highly expressive grammar capable of generating a wide range of types of models. Models which consist of skeletal structures or surfaces or any combination of these. Besides generic modelling capabilities, the focus has also been on usability, especially userfriendliness and efficiency. Therefore several steps have been taken to simplify the workflow as well as to make the modelling scheme interactive. As proof of concept, a generic procedural modelling tool based on Generic Graph Grammar has been developed.
    Original languageEnglish
    Title of host publicationProceedings of the 28th Spring conference on Computer Graphics
    Number of pages8
    PublisherAssociation for Computing Machinery
    Publication date2012
    Pages85-92
    DOIs
    Publication statusPublished - 2012
    Event28th Spring conference on Computer Graphics - Smolenice castle, Smolenice, Slovakia
    Duration: 2 May 20124 May 2012
    http://www.sccg.sk/

    Conference

    Conference28th Spring conference on Computer Graphics
    LocationSmolenice castle
    CountrySlovakia
    CitySmolenice
    Period02/05/201204/05/2012
    Internet address

    Keywords

    • Procedural Modelling
    • Graph Grammars
    • Skeletons
    • Interactive Modelling

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