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Paper

Simplified Definition of Parameter Spaces of a Procedural Model using Sketch-based InteractionTopics: CAGD/CAD/CAM Systems; Modeling and Algorithms; Procedural and Multiresolution Modeling; Sketch-Based Interfaces

Keyword(s):Sketch based Modeling, Sketching, 3D Modeling, Parameter Ranges, Parametric Modeling, Procedural Modeling.

Related
Ontology
Subjects/Areas/Topics:CAGD/CAD/CAM Systems
;
Computer Vision, Visualization and Computer Graphics
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Geometry and Modeling
;
Interactive Environments
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Modeling and Algorithms
;
Sketch-Based Interfaces

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.(More)

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.

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Merz, J.; Getto, R.; Kuijper, A. and Fellner, D. (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 - Volume 1 GRAPP: GRAPP, ISBN 978-989-758-287-5, pages 223-231. DOI: 10.5220/0006613002230231

@conference{grapp18, author={Johannes Merz. and Roman Getto. and Arjan Kuijper. and Dieter W. Fellner.}, title={Simplified Definition of Parameter Spaces of a Procedural Model using Sketch-based Interaction}, booktitle={Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1 GRAPP: GRAPP,}, year={2018}, pages={223-231}, publisher={SciTePress}, organization={INSTICC}, doi={10.5220/0006613002230231}, isbn={978-989-758-287-5}, }

TY - CONF

JO - Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1 GRAPP: GRAPP, TI - Simplified Definition of Parameter Spaces of a Procedural Model using Sketch-based Interaction SN - 978-989-758-287-5 AU - Merz, J. AU - Getto, R. AU - Kuijper, A. AU - Fellner, D. PY - 2018 SP - 223 EP - 231 DO - 10.5220/0006613002230231