HCSG: Hashing for real-time CSG modeling - Inria - Institut national de recherche en sciences et technologies du numérique Accéder directement au contenu
Communication Dans Un Congrès Année : 2018

HCSG: Hashing for real-time CSG modeling

Résumé

Constructive Solid Geometry models solids as boolean combinations of base primitives. It is one of the classical modeling approaches in Computer Graphics. With the advent of 3D printing, it has received a renewed interest: CSG affords for the robust definition of solids, and fits well with parametric modeling, affording for easy customization of existing designs. However, the interactive display and manipulation of CSG models is challenging: Ideally, CSG has to be performed between a variety of solid representations (meshes, implicit solids, voxels) and the renderer has to provide immediate feedback during parameter exploration. The end result has to be prepared for fabrication, which involves robustly extracting cross-sections of the model. In this work we propose a novel screen space technique for the rendering, interactive modeling and direct fabrication of parametric CSG models. It builds upon spatial hashing techniques to efficiently evaluate CSG expressions, checking whether each interval along a view ray is solid in constant time, using constant local shader memory. In addition, the scene is rendered progressively, from front to back, bounding memory usage. We describe how the hash encoding the CSG is constructed on the fly during visualization, and analyze performance on a variety of 3d models.
Fichier principal
Vignette du fichier
hcsg.pdf (7.24 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01792866 , version 1 (16-05-2018)

Identifiants

Citer

Cédric Zanni, Frédéric Claux, Sylvain Lefebvre. HCSG: Hashing for real-time CSG modeling. Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games, May 2018, Montreal, Canada. ⟨10.1145/3203198⟩. ⟨hal-01792866⟩
1152 Consultations
1201 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More