Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Simplified definition of parameter spaces of a procedural model using sketchbased interaction
 Institute for Systems and Technologies of Information, Control and Communication INSTICC, Setubal: 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, VISIGRAPP 2018. Proceedings. Vol.1: GRAPP : January 2729, 2018, in Funchal, Madeira, Portugal SciTePress, 2018 ISBN: 9789897582875 S.223231 
 International Joint Conference on Computer Vision and Computer Graphics Theory and Applications (VISIGRAPP) <13, 2018, Funchal> International Conference on Computer Graphics Theory and Applications (GRAPP) <13, 2018, Funchal> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer IGD () 
 sketch based modeling; sketching; 3D modeling; Parameter Ranges; parametric modeling; procedural modeling; Guiding Theme: Digitized Work; Research Area: Computer graphics (CG) 
Abstract
This paper presents a novel technique to intuitively insert metaparameters into a procedural model with the help of sketchbased interaction. The procedural model is represented in a GML (Generative Modeling Language) representation, which is a script language that focuses on the description of threedimensional 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 Bspline. Exchanging the initial values of the commands by this Bspline, defines a continuous parameter space of the metaparameter. The deformation process is supported by a mesh segmentation to create predefined deformation targets. Using sketchbased 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.