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Parallel graphics and Interactivity with the Scaleable graphics Engine 01

Parallel Graphics and Interactivity with the Scaleable Graph...

引用

2001 ACM/IEEE conference on Supercomputing, SC 2001

作者： Perrine, Kenneth A. Jones, Donald R. William R. Wiley Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory PO Box 999 MS K1 - 96 RichlandWA99352 United States

ISBN: (纸本)158113293X

A parallel rendering environment is being developed to utilize the IBM Scaleable graphics Engine (SGE), a hardware frame buffer for parallel computers. Goals of this software development effort include finding efficient ways of producing and displaying graphics generated on IBM SP nodes and of assisting programmers in adapting or creating scientific simulation applications to use the SGE. Four software development phases discussed utilize the SGE: tunneling, SMP rendering, development of an OpenGL API implementation which utilizes the SGE in parallel environments, and additions to the SGE-enabled OpenGL implementation that uses threads. The performance observed in software tests show that programmers would be able to utilize the SGE to output interactive graphics in a parallel environment. © 2001 ACM.

关键词： Application programs

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Processing and rendering of point sampled geometry

Processing and rendering of point sampled geometry

引用

pacific conference on computer graphics and applications

作者： M. Gross Institute of Scientific Computing Swiss Federal Institute of Technology Switzerland

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Correcting texture mapping errors introduced by graphics hardware

Correcting texture mapping errors introduced by graphics har...

引用

pacific conference on computer graphics and applications

作者： M.M. Oliveira Department of Computer Science State University of New York Stony Brook USA

Most rendering engines subdivide arbitrary polygons into a collection of triangles, which are then rendered independently of each other. This procedure can introduce severe artifacts when rendering texture-mapped quadrilaterals. These errors result from a fundamental limitation: the impossibility of performing general projective mappings using only the information available at the vertices of a single triangle. Texture mapping involving arbitrary quadrilaterals has practical importance in applications that use real images as textures, such as in image-based modeling and rendering. The paper presents an efficient adaptive-subdivision solution to the problem, which, due to its simplicity, can be easily incorporated into graphics APIs.

关键词： Error correction Hardware Rendering (computer graphics) computer graphics Engines Buildings Surface texture Solid modeling computer errors computer science

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Progressive isosurface extraction from tetrahedral meshes

Progressive isosurface extraction from tetrahedral meshes

引用

pacific conference on computer graphics and applications

作者： U. Labsik P. Kipfer S. Meinlschmidt G. Greiner Computer Graphics Group University of Erlangen Nuremberg Tennenlohe Germany

ISBN: (纸本)0769512275

The authors present a technique for transforming a tetrahedral mesh into a progressive representation based on half edge collapses. This allows the efficient transmission of the mesh from a remote computer where the simulation was computed to a visualization computer. During the transmission, the user can start visualizing while the transmission is still in progress. We show a technique for progressively extracting isosurfaces from the progressive mesh. Starting with the base mesh, an isosurface for a specific value is computed and will locally be improved where a vertex is inserted into the mesh.

关键词： Isosurfaces Computational modeling Workstations computer graphics computer simulation Data mining Concurrent computing Approximation error Data visualization

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Visibility preprocessing for urban scenes using line space subdivision

Visibility preprocessing for urban scenes using line space s...

引用

pacific conference on computer graphics and applications

作者： J. Bittner P. Wonka M. Wimmer Center for Applied Cybernetics Czech Technical University Prague Czech Republic Institute of Computer Graphics Vienna University of Technology Austria Institute of Computer Graphics Vienna University of Technology

We present an algorithm for visibility preprocessing of urban environments. The algorithm uses a subdivision of line space to analytically calculate a conservative potentially visible set for a given region in the scene. We present a detailed evaluation of our method, including a comparison to another recently published visibility preprocessing algorithm. To the best of our knowledge, the proposed method is the first algorithm that scales to large scenes and efficiently handles large view cells.

关键词： Layout Space technology computer graphics Analytical models Testing Cybernetics Algorithm design and analysis Geometry Computational complexity Robots

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Minimizing the distortion of affine spline motions

Minimizing the distortion of affine spline motions

引用

pacific conference on computer graphics and applications

作者： Dae-Eun Hyun B. Juttler Myung-Soo Kim School of Computer Science and Engineering Seoul National University South Korea Institute of Analysis and Computational Mathematics Johannes Kepler University Linz Linz Austria

ISBN: (纸本)0769512275

The paper proposes a simple approach to the affine motion interpolation problem, where an affine spline motion is generated that interpolates a given sequence of affine keyframes and approximately satisfies rigidity constraints and certain optimization criteria. An affine spline motion is first generated so as to interpolate the given keyframes; after that, it is progressively refined via knot insertion and degree elevation into an optimal affine motion by an iterative optimization procedure.

关键词： Spline Matrix decomposition Symmetric matrices Interpolation Animation Constraint optimization Quaternions computer science Mathematics computer graphics

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Morphing stick figures using optimized compatible triangulations

Morphing stick figures using optimized compatible triangulat...

引用

pacific conference on computer graphics and applications

作者： V. Surazhsky C. Gotsman Department of Computer Science Technion-Israel Institute of Technology Haifa Israel

A "stick figure" is a connected straight-line plane graph, sometimes called a "skeleton". Compatible stick figures are those with the same topological structure. We present a method for naturally morphing between two compatible stick figures in a manner that preserves compatibility throughout the morph. In particular, this guarantees that the intermediate shapes are also stick figures (e.g. they do not self-intersect). Our method generalizes existing algorithms for morphing compatible planar polygons using Steiner vertices, and improves the complexity of those algorithms by reducing the number of Steiner vertices used.

关键词： Shape Animation Trajectory computer science Cities and towns computer graphics

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On the numerical redundancies of geometric constraint systems

On the numerical redundancies of geometric constraint system...

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pacific conference on computer graphics and applications

作者： Yan-Tao Li Shi-Min Hu Ra-Guang Sun Department of Computer Science and Technoloa Tsinghua University Beijing China

ISBN: (纸本)0769512275

Determining redundant constraints is a critical task for geometric constraint solvers, since it dramatically affects the solution speed, accuracy, and stability. The paper attempts to determine the numerical redundancies of three-dimensional geometric constraint systems via a disturbance method. The constraints are translated into some unified forms and added to a constraint system incrementally. The redundancy of a constraint can then be decided by disturbing its value. We also prove that graph reduction methods can be used to accelerate the determination process.

关键词： Acceleration Algorithm design and analysis Sun computer science Stability Manufacturing Equations Testing Optimization methods

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FastMesh: efficient view-dependent meshing

FastMesh: efficient view-dependent meshing

引用

pacific conference on computer graphics and applications

作者： R. Pajarola Information & Computer Science University of California Irvine Irvine CA USA

The article presents an optimized view-dependent meshing framework for adaptive and continuous level-of-detail (LOD) rendering in real-time. Multiresolution triangle mesh representations are an important tool for adapting triangle mesh complexity in real-time rendering environments. Ideally, for interactive visualization, a triangle mesh is simplified to the maximal tolerated perceptual error, and thus mesh simplification is view-dependent. The paper introduces an efficient hierarchical multiresolution triangulation framework based on a half-edge triangle mesh data structure, and presents an optimized computation of several view-dependent error metrics within that framework, providing conservative error bounds. The presented approach called FastMesh, is highly efficient both in space and time cost, and it spends only a fraction of the time required for rendering to perform the error calculations and dynamic mesh updates.

关键词： computer errors computer graphics Pipelines Data structures computer science Data visualization Costs Rendering (computer graphics) Error correction Chromium

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Dual b-rep-CSG collision detection for general polyhedra

Dual b-rep-CSG collision detection for general polyhedra

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pacific conference on computer graphics and applications

作者： K. Poutrain M. Contensin Laboratoire d Informatique de Marseille Centre de Mathématiques et dInformatique Marseilles France

While almost all collision detection algorithms have been linked to a particular object representation scheme, few attempts have been made using hybrid methods to exploit the advantages of multiple representations of objects. In this paper we present a collision detection algorithm based on a dual b-rep/CSG representation of concave polyhedra initially represented in b-rep. Our method naturally combines the use of bounding volumes, hierarchical subdivision, and space partitioning to perform the interference test.

关键词： Testing Solids Interference Detection algorithms Geometry computer graphics Object detection Face detection Vents Computational efficiency

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