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检索条件"任意字段=Computer Aided Design and Computer Graphics, 2005. Ninth International Conference on"

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Implementation and application of the distributed collaborative design platform based on pattern design

Implementation and application of the distributed collaborat...

引用

international conference on computer Supported Cooperative Work in design

作者： Bin Gong Xiangxu Meng Chenglei Yang School of Computer Science and Technology Shandong University China

ISBN: (纸本)184000025

According to the CSCW cooperative mechanism, this paper presents the implementation of the distributed collaborative design platform based on pattern design, which is an application of CSCW in CAD. The architecture platform and protocol implementation is provided. It also describes the push and pulls functions used to perform data integrity and maintenance consistency. The applications show that the platform has features of CSCW to ensure that it operates well in real world conditions.

关键词： Collaboration design automation Collaborative work Application software computer interfaces computer networks graphics computer science Protocols Communications technology

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Real-time rendering of raining animation based on the graphics hardware acceleration

Real-time rendering of raining animation based on the graphi...

引用

international conference on computer Supported Cooperative Work in design

作者： Zhong-Xin Feng Min Tang Jin-Xiang Dong Shang-Ching Chou College of Computer Science and Technology University of Zhejiang Hangzhou China Department of Computer Science Wichita State University Wichita KS USA

ISBN: (纸本)184000025

We present an efficient method for simulation of raining phenomenon in real time by taking advantage of the parallelism and programmability of GPU (graphic processing unit). Our implementation of the method is based on particle systems and collision detection. Splashing of raindrop is simulated using a series of stylized textures and rotations of point sprites. Taking into account human perception in raining phenomenon of real world, the effects such as light influence, depth of field, motion blur, have been applied. The test results show that our method is efficient and is feasible to solve the problem of 3D raining simulation in real time for more general environment with complex geometry.

关键词： Rendering (computer graphics) Animation graphics Hardware Acceleration Sprites (computer) Humans Testing Solid modeling Geometry

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Fast mesh-free deformations

Fast mesh-free deformations

引用

IEEE international conference on computer-aided design and computer graphics

作者： Jian Chang Xiaosong Yang J.J. Zhang Bournemouth University UK

Mesh-free deformation is an effective method for the simulation of deformable objects and characters in computer animation. It bears the merits of flexible control, good accuracy and easy implementation. Similar to other physically-based deformation techniques, however, computational cost remains a pressing issue, especially for large scale problems. Based on our previous work, in this paper we investigate the underlying structure of the numerical approach in order to speed up the computation. Three algorithms are presented and their efficiency and convergence are analysed. Our results show that we are able to significantly reduce the computation time and memory usage with little loss in accuracy. The new technique is capable of achieving interactive frame rates with large models.

关键词： Computational modeling Springs Deformable models Animation computer simulation Large-scale systems Convergence Algorithm design and analysis Power system modeling computer graphics

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Abstract interactions and interaction refinement in model-driven design

Abstract interactions and interaction refinement in model-dr...

引用

9th IEEE international Enterprise Distributed Object Computing conference

作者： Almeida, JP Dijkman, R Pires, LF Quartel, D van Sinderen, M Univ Twente Ctr Telemat & Informat Technol Enschede Netherlands

ISBN: (纸本)0769524419

In a model-driven design process the interaction between application parts can be described at various levels of platform-independence. At the lowest level of platform-independence, interaction is realized by interaction mechanisms provided by specific middleware platforms. At higher levels of platform-independence, interaction must be described in such a way that it can be further refined and realized onto a number of different middleware platforms, each with its particular interaction mechanisms and implementation constraints. In this paper we investigate concepts that support interaction design at various levels of middleware-platform independence. Also, we propose design operations for interaction refinement. The application of these operations to source designs results in target designs that take into account implementation constraints imposed by platforms, while preserving characteristics prescribed in source designs.

关键词： computer aided design

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The GPU on irregular computing: performance issues and contributions

The GPU on irregular computing: performance issues and contr...

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IEEE international conference on computer-aided design and computer graphics

作者： M. Ujaldon J. Saltz Computer Architecture Department Complejo Tecnologico University of Malaga Malaga Spain Biomedical Informatics Department Ohio State Uinversity Columbus OH USA

The paper describes a set of strategies for mapping irregular codes onto commodity graphics hardware. We start identifying the resources that current GPUs contain for solving indirect array accesses entirely on hardware, like vertices, textures and color tables. We then show how multiple indirections can be mapped onto the graphics pipeline, basically taking advantage of its streaming architecture for sequencing the indirections through subsequent pipeline stages. Our techniques are applied over typical irregular kernels like the sparse matrix-vector multiply and the Euler solver. Execution times on the GeForce Series consistently outperform the Pentium 4 and Athlon 64 processors, with performance depending on floating-point precision.

关键词： Kernel computer graphics Streaming media Pipelines Hardware Computational geometry Rendering (computer graphics) Functional programming Biomedical computing computer architecture

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Adaptive rendering of Catmull-Clark subdivision surfaces

Adaptive rendering of Catmull-Clark subdivision surfaces

引用

IEEE international conference on computer-aided design and computer graphics

作者： Shuhua Lai F.F. Cheng Department of Computer Science University of Kentucky Lexington KY USA

In this paper, we present a new adaptive rendering method for general Catmull-Clark subdivision surfaces. The new method is based on direct evaluation of the limit surface to generate an inscribed polyhedron of the limit surface. The method generates fewer polygons in the final rendering process because inscribed approximation usually provides faster convergent rate than circumscribed approximation. The new adaptive rendering method can precisely measure error for every point of the limit surface. Hence, it has complete control of the accuracy of the rendering result. Cracks are avoided by using a recursive marking process to ensure that adjacent patches or subpatches use the same limit surface points in the construction of the shared boundary. The new method performs limit surface evaluation only at points that are needed for the final rendering process. Therefore it is very fast and memory efficient.

关键词： Surface cracks Rendering (computer graphics) computer graphics Solid modeling computer science Performance evaluation Mesh generation Joining processes Spline design automation

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Acceleration of regular grid traversals using extended chessboard distance transformation on GPU

Acceleration of regular grid traversals using extended chess...

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IEEE international conference on computer-aided design and computer graphics

作者： A. Es V. Isler METU Tübitak-Bilten Turkey Computer Engineering Department M.E.T.U. Turkey

In the recent years graphics processing units (GPU) have evolved into general purpose programmable streaming parallel processors. This evolution makes it possible to implement high quality photo realistic rendering techniques on graphics processors. There have been a few studies to show how to map ray tracing to the GPU. Since graphics processors are not designed to process complex data structures, it is crucial to explore data structures and algorithms for efficient stream processing. In particular ray traversal is one of the most time consuming parts of ray tracing methods. In this work we focus on the efficient ray traversals on GPU. Several known techniques have been redesigned and adapted to the GPU programming model. Also a new traversal method based on extended anisotropic chessboard distance metric has been introduced.

关键词： Acceleration Data structures Ray tracing computer graphics Anisotropic magnetoresistance Concurrent computing Rendering (computer graphics) Process design Algorithm design and analysis Parallel processing

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DIGITAL ART: A brief history of the Graphical User Interface in contemporary art practice, 1994-2004

DIGITAL ART: A brief history of the Graphical User Interface...

引用

9th international conference on Information Visualisation

作者： Gwilt, I Univ Technol Sydney Sch Design Sydney NSW 2007 Australia

ISBN: (纸本)0769523978

This paper will explore the use of the Graphical User Interface (GUI) in contemporary art practice and examine how the cultural ubiquity of digital computing has allowed the GUI to become an interesting source of creative content. It will trace examples where the visual aesthetic of the computer interface has been referenced within 2d media: paintings, digital prints, web art and the gaming interface.

关键词： computer graphics

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Application of DSM-based process reengineering in multidisciplinary cooperative design

Application of DSM-based process reengineering in multidisci...

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9th international conference on computer Supported Cooperative Work in design

作者： Xu, Lu-Ning Zhang, He-Ming Xu, Wen-Sheng Hang, Yong-Kang National CIMS Engineering Research Center Tsinghua University Beijing China Computing Laboratory Kent University Canterbury United Kingdom School of Mechanical Engineering Jiangsu University Jiangsu Zhenjiang China

ISBN: (纸本)1846000025

This paper presents a method of matrix application to the multidisciplinary cooperative design for complex products. Based on classifying the interdependency relationship between different design activities and describing the definition & types of DSM (design structure matrix), the design flow diagram is illustrated by the matrix of DSM. Then a new DSM is gained by analyzing and partitioning the original DSM, at the same time a new information flow and design flow diagram of reducing the coupled activities is proposed. Finally, the discussions and conclusions for the application of DSM in multidisciplinary cooperative design process are given at the end of this paper.

关键词： computer aided design

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Scattering-based interactive hair rendering

Scattering-based interactive hair rendering

引用

IEEE international conference on computer-aided design and computer graphics

作者： R. Gupta N. Magnenat-Thalmann MIRALaboratory University of Genova Geneva Switzerland

Simulating fast and realistic complex light effect within hair is one of the most challenging problems in the field of virtual humans, both in terms of research and of development. In this paper we propose a scattering-based fast and efficient algorithm that handles both the local specular highlights and global self-shadow in animated hair at interactive rates. We introduce a fast refinement technique for incorporating illumination variations in animated hair from the encoded hair density changes considering the spatial coherency in hair data. Our method does pre-computations for any static hairstyle, optimizes it and then efficiently utilizes it along with the refined data for the animated hairstyle. The various optimizations implemented result in interactive simulation while maintaining the aesthetic visual appearance of the hair.

关键词： Hair Optical scattering Animation Light scattering Optical attenuators Computational modeling Lighting Geometrical optics Rendering (computer graphics) Humans

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