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**Fellner, Dieter W. and Kuijper, Arjan and Getto, Roman and Merz, Johannes** (2018):

*Simplified Definition of Parameter Spaces of a Procedural Model using Sketch-based Interaction.*

In: Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, pp. 223-231,

Setúbal, Portugal, SciTePress, International Conference on Computer Graphics Theory and Applications (GRAPP), Funchal, Madeira, Portugal, 2018, ISBN 978-989-758-287-5,

DOI: 10.5220/0006613002230231,

[Conference or Workshop Item]

## Abstract

This paper presents a novel technique to intuitively insert meta-parameters into a procedural model with the help of sketch-based interaction. The procedural model is represented in a GML (Generative Modeling Language) representation, which is a script language that focuses on the description of three-dimensional models. A GML model consists of a sequence of procedural modeling commands, for example extrusions. These are called with a set of local offset positions, which can be converted to global space and anchored in the surface mesh by finding reference vertices on the mesh. The system uses a deformation technique to deform the surface of the model. During the deformation, the reference vertices provide the global offset positions, whose path can be approximated by a B-spline. Exchanging the initial values of the commands by this B-spline, defines a continuous parameter space of the meta-parameter. The deformation process is supported by a mesh segmentation to create pre-defined deformation targets. Using sketch-based methods, these can be adapted to the user's needs. The results show that the system closely imitates the deformation with the help of the modeling commands. Furthermore, the system was evaluated to be intuitive and easy to use.

Item Type: | Conference or Workshop Item |
---|---|

Erschienen: | 2018 |

Creators: | Fellner, Dieter W. and Kuijper, Arjan and Getto, Roman and Merz, Johannes |

Title: | Simplified Definition of Parameter Spaces of a Procedural Model using Sketch-based Interaction |

Language: | English |

Abstract: | This paper presents a novel technique to intuitively insert meta-parameters into a procedural model with the help of sketch-based interaction. The procedural model is represented in a GML (Generative Modeling Language) representation, which is a script language that focuses on the description of three-dimensional models. A GML model consists of a sequence of procedural modeling commands, for example extrusions. These are called with a set of local offset positions, which can be converted to global space and anchored in the surface mesh by finding reference vertices on the mesh. The system uses a deformation technique to deform the surface of the model. During the deformation, the reference vertices provide the global offset positions, whose path can be approximated by a B-spline. Exchanging the initial values of the commands by this B-spline, defines a continuous parameter space of the meta-parameter. The deformation process is supported by a mesh segmentation to create pre-defined deformation targets. Using sketch-based methods, these can be adapted to the user's needs. The results show that the system closely imitates the deformation with the help of the modeling commands. Furthermore, the system was evaluated to be intuitive and easy to use. |

Title of Book: | Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications |

Place of Publication: | Setúbal, Portugal |

Publisher: | SciTePress |

ISBN: | 978-989-758-287-5 |

Uncontrolled Keywords: | Sketch based modeling, Sketching, 3D Modeling, Parameter ranges, Parametric modeling, Procedural modeling |

Divisions: | 20 Department of Computer Science 20 Department of Computer Science > Interactive Graphics Systems 20 Department of Computer Science > Mathematical and Applied Visual Computing |

Event Title: | International Conference on Computer Graphics Theory and Applications (GRAPP) |

Event Location: | Funchal, Madeira, Portugal |

Event Dates: | 2018 |

Date Deposited: | 01 Jul 2019 08:48 |

DOI: | 10.5220/0006613002230231 |

Official URL: | https://doi.org/10.5220/0006613002230231 |

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