OpenFlipper: An Open Source Geometry Processing and Rendering Framework

Möbius, Jan; Kobbelt, Leif

doi:10.1007/978-3-642-27413-8_31

Cited by 58 publications

(39 citation statements)

References 8 publications

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“…Furthermore, it is possible to represent non-manifold mesh configurations including mixeddimensional entities. Additionally, OpenVolumeMesh is fully integrated into the OpenFlipper geometry processing framework [24]. OpenVolumeMesh is open-source software licensed under the terms of the GNU LGPL and available at www.openvolumemesh.org.…”

Section: Resultsmentioning

confidence: 99%

OpenVolumeMesh – A Versatile Index-Based Data Structure for 3D Polytopal Complexes

Kremer

Bommes

Kobbelt

2013

Proceedings of the 21st International Meshing Roundtable

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Summary. We present a data structure which is able to represent heterogeneous 3-dimensional polytopal cell complexes and is general enough to also represent nonmanifolds without incurring undue overhead. Extending the idea of half-edge based data structures for two-manifold surface meshes, all faces, i.e. the two-dimensional entities of a mesh, are represented by a pair of oriented half-faces. The concept of using directed half-entities enables inducing an orientation to the meshes in an intuitive and easy to use manner.We pursue the idea of encoding connectivity by storing first-order top-down incidence relations per entity, i.e. for each entity of dimension d, a list of links to the respective incident entities of dimension d−1 is stored. For instance, each half-face as well as its orientation is uniquely determined by a tuple of links to its incident halfedges or each 3D cell by the set of incident half-faces. This representation allows for handling non-manifolds as well as mixed-dimensional mesh configurations. No entity is duplicated according to its valence, instead, it is shared by all incident entities in order to reduce memory consumption. Furthermore, an array-based storage layout is used in combination with direct index-based access. This guarantees constant access time to the entities of a mesh.Although bottom-up incidence relations are implied by the top-down incidences, our data structure provides the option to explicitly generate and cache them in a transparent manner. This allows for accelerated navigation in the local neighborhood of an entity.We provide an open-source and platform-independent implementation of the proposed data structure written in C++ using dynamic typing paradigms. The library is equipped with a set of STL compliant iterators, a generic property system to dynamically attach properties to all entities at run-time, and a serializer/deserializer supporting a simple file format. Due to its similarity to the OpenMesh data structure, it is easy to use, in particular for those familiar with OpenMesh. Since the presented data structure is compact, intuitive, and efficient, it is suitable for a variety of applications, such as meshing, visualization, and numerical analysis. OpenVolumeMesh is open-source software licensed under the terms of the LGPL.

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Section: Resultsmentioning

confidence: 99%

OpenVolumeMesh – A Versatile Index-Based Data Structure for 3D Polytopal Complexes

Kremer

Bommes

Kobbelt

2013

Proceedings of the 21st International Meshing Roundtable

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“…Our design tool is implemented as a plugin of OPENFLIPPER [Möbius and Kobbelt 2012]. The accompanying video provides a didactic, visual explanation of the design and interaction process.…”

Section: Resultsmentioning

confidence: 99%

Wire mesh design

et al. 2014

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Figure 1: Wire mesh design allows creating physical realizations (1 st and 5 th images) of a given design surface (2 nd and 4 th images) composed of interwoven material (middle image) in an interactive, optimization-supported design process. Both the torso and the Igea face are constructed from a single sheet of regular wire mesh. AbstractWe present a computational approach for designing wire meshes, i.e., freeform surfaces composed of woven wires arranged in a regular grid. To facilitate shape exploration, we map material properties of wire meshes to the geometric model of Chebyshev nets. This abstraction is exploited to build an efficient optimization scheme. While the theory of Chebyshev nets suggests a highly constrained design space, we show that allowing controlled deviations from the underlying surface provides a rich shape space for design exploration. Our algorithm balances globally coupled material constraints with aesthetic and geometric design objectives that can be specified by the user in an interactive design session. In addition to sculptural art, wire meshes represent an innovative medium for industrial applications including composite materials and architectural façades. We demonstrate the effectiveness of our approach using a variety of digital and physical prototypes with a level of shape complexity unobtainable using previous methods.

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“…Additionally we thank David Bommes for his technical advice. Our implementation is based on the OpenFlipper framework [Möbius and Kobbelt 2010].…”

Section: Acknowledgmentsmentioning

confidence: 99%

Variational Tangent Plane Intersection for Planar Polygonal Meshing

Zimmer

Campen

Herkrath

et al. 2013

Advances in Architectural Geometry 2012

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Abstract. Several theoretical and practical geometry applications are based on polygon meshes with planar faces. The planar panelization of freeform surfaces is a prominent example from the field of architectural geometry. One approach to obtain a certain kind of such meshes is by intersection of suitably distributed tangent planes. Unfortunately, this simple tangent plane intersection (TPI) idea has a number of limitations. It is restricted to the generation of hexagon-dominant meshes: as vertices are in general defined by three intersecting planes, the resulting meshes are basically duals of triangle meshes. Furthermore, the explicit computation of intersection points requires dedicated handling of special cases and degenerate constellations to achieve robustness on freeform surfaces. Another limitation is the small number of degrees of freedom for incorporating design parameters.Using a variational re-formulation, we equip the concept of TPI with additional degrees of freedom and present a robust, unified approach for creating polygonal structures with planar faces that is readily able to integrate various objectives and constraints needed in different applications scenarios. We exemplarily demonstrate the abilities of our approach on three common problems in geometry processing.

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OpenFlipper: An Open Source Geometry Processing and Rendering Framework

Cited by 58 publications

References 8 publications

OpenVolumeMesh – A Versatile Index-Based Data Structure for 3D Polytopal Complexes

OpenVolumeMesh – A Versatile Index-Based Data Structure for 3D Polytopal Complexes

Wire mesh design

Variational Tangent Plane Intersection for Planar Polygonal Meshing

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