Shell maps

Porumbescu, Serban D.; Budge, Brian; Liu, Feng; Joy, Kenneth I.

doi:10.1145/1186822.1073239

Cited by 45 publications

(40 citation statements)

References 25 publications

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“…To achieve these goals, the heuristic of letting neighboring d i s be nearly parallel is conducted. Similar heuristic method was used in [22] to generate 3D homeomorphic surfaces. Specifically, we use the 2D shape skeleton [3] to establish shifting direction for each vertex p i on a polygon Γ .…”

Section: Shifting Directionmentioning

confidence: 99%

Cross section-based hollowing and structural enhancement

Wang

Qian

et al. 2017

Vis Comput

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Recently, 3D printing has become a powerful tool for personal fabrication. However, the price of some materials are still high which limits its applications in home users. To optimize the volume of the model, while not largely affecting the strength of the objects, researchers propose algorithms to divide the model with different kind of light weight structures, such as frame structure, honeycomb-cell structure, truss structure, medial axis tree, etc. However, these algorithms are not suitable for the model whose internal space needs to be reused. In addition, the structural strength and static stability of the models, obtained with modern 3D model acquirement methods, are not guaranteed. In consequence, some models are too fragile to print, and cannot be survived in daily usage, handling, and transportation, or cannot stand in a stable.To handle the mentioned problems, an algorithm system is proposed based on cross sections in this work. The structural weak cross sections are enhanced and structural strong cross sections are adaptively hollowed to meet a given structural strength, static stability, printability, etc., while the material usage is minimized. The proposed algorithm system has been tested on several typical 3D models. The experimental results demonstrate the effectiveness and practicability of our system.

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Section: Shifting Directionmentioning

confidence: 99%

Cross section-based hollowing and structural enhancement

Wang

Qian

et al. 2017

Vis Comput

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“…The idea of mapping a three-dimensional volume onto a surface with prisms also showed up in shell maps [PBFJ05].…”

Section: Thick Surfacesmentioning

confidence: 99%

Displacement Mapping on the GPU — State of the Art

Szirmay‐Kalos¹,

Umenhoffer²

2008

Computer Graphics Forum

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“…no edges should cross, otherwise linear interpolation of shell space texture coordinates yields inconsistent results. For the generation of a consistent tetrahedra mesh see for instance [Porumbescu et al 2005]. …”

Section: Tetrahedra Mesh Generationmentioning

confidence: 99%

“…Using a simplified form of ray tracing, this finer scaled geometry can then be rendered into the space either directly above or below the coarse triangle mesh. In this work, this layer is referred to as 'shell space' according to Porumbescu et al [2005]. The geometry mapped into the shell space is called 'shell geometry'.…”

Section: Introductionmentioning

confidence: 99%

Real-time shell space rendering of volumetric geometry

Ritsche¹

2006

Proceedings of the 4th International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast As

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This work introduces a new technique for real-time rendering of arbitrary volumetric geometry into a polygonal mesh's shell space. The shell space is a layer of variable thickness on top or below the polygonal mesh. The technique computes view ray shell geometry intersections in a pixel shader. In addition to arbitrary volumetric shell geometry, represented as volume textures, it can handle also the less general case of height-field shell geometry. To minimize the number of ray tracing steps, a 3D distance map is used for skipping empty space in the shell volume. The shell volume is defined by a pre-computed tetrahedra mesh. The tetrahedra subdivide prisms extruded from the polygonal base mesh. A vertex shader computes tetrahedron face plane distances for generating the per-pixel tetrahedron thickness using non-linear interpolation. The technique includes local lighting and overcomes shortcomings of previous shell space rendering approaches such as high storage requirements and involved per-vertex computations [Wang et al. 2004] or low shell geometry depth complexity and mapping distortions [Policarpo and Oliveira 2006]. Additionally, rendering artifacts for shallow view angles common to many related techniques are reduced. Furthermore, methods for generating a geometry volume texture and the corresponding distance map from a polygonal mesh are presented.

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Shell maps

Cited by 45 publications

References 25 publications

Cross section-based hollowing and structural enhancement

Cross section-based hollowing and structural enhancement

Displacement Mapping on the GPU — State of the Art

Real-time shell space rendering of volumetric geometry

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