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Fast and stable animation of cloth with an approximated implicit method

Fast and stable animation of cloth with an approximated impl...

引用

computer graphics International

作者： Young-Min Kang Jeong-Hyeon Choi Hwan-Gue Cho Chan-Jong Park Graphics Application Lab Department of Computer Science Pusan National University South Korea Virtual Reality Center Electronics and Telecommunication Research Institute

Realistic animation of soft objects such as cloth is essential for plausible character animation. Many techniques have been proposed for the simulation of soft objects, and most of them are based on numerical integration. Among the techniques, the implicit integration method is the most likely technique for real time environments, since it allows large time steps for cloth simulation by ensuring the stability of systems. However the most critical flaw of the implicit method is that it involves a large linear system. The paper presents a fast animation technique for animating soft objects based on a mass-spring model with an approximated implicit method which does not involve linear system solving. The proposed technique stably updates the state of n mass-points in O(n) time when the number of total springs are O(n). Because the mass-spring model shows a superelastic effect, the excessively deformed springs (i.e., super-elongated springs) should be adjusted for reality. The paper presents an efficient inverse dynamics process to adjust the super-elongated springs.

关键词： Animation Springs Computational modeling Linear systems Stability Deformable models Electrical capacitance tomography Image generation computer graphics Application software

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Intuitive virtual grasping for non haptic environments

Intuitive virtual grasping for non haptic environments

引用

Pacific Conference on computer graphics and Applications

作者： T. Ullmann J. Sauer Department of Computer Science and Automation Computer Graphics Program Technical University Ilmenau Ilmenau Germany Commercial Vehicle Development DaimlerChrysler Aerospace Sindelfingen Germany Virtual Reality Competence Center Daimler Chrysler Research and Technology Center Ulm Germany

This paper presents an approach for grasping virtual objects in virtual environments with a data glove. Our focus lies on developing new methods that allow sensible realistic grasping gestures which correspond to human grasping behavior. To meet the demands of industrial applications, users must be able to grasp an object in an intuitive way with one or two hands and, beyond that, manipulate grasped objects between their fingers. To avoid the use of expensive force or touch feedback hardware, but also to ensure a safe grip on virtual objects, several forms of visual feedback are provided. First, we describe the basic algorithm for grasping with one or two hands and finally, we present a method to precisely manipulate the grasped objects between the virtual fingers.

关键词： Grasping Haptic interfaces Data gloves virtual reality virtual environment Fingers Force feedback Hardware Application software Engines

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Distributed interactive learning environment

Distributed interactive learning environment

引用

International Workshop on Distributed Interactive Simulation and Real Time Applications

作者： J.X. Chen C.J. Dede Xiaodong Fu Yonggao Yang Computer Graphics Laboratory and Virtual Reality Lab George Mason University USA

We present strategies and approaches used to implement a synthetic learning environment which includes networking, distributed interactive simulation, physically-based modeling, computational steering, and virtual reality for learning abstract scientific concepts. The resulting technology is a testbed that reflects the benefits of a schoolhouse for training and education, especially for learning scientific abstract concepts. Students are allowed to interact with one another and engage in realistic collaborative exercises. Our network architecture and protocol allow the interactive networked environment to be much more scalable. Our innovative use of computational steering and interactive visualization allows students to visualize and manipulate the physical process, and understand the abstract concept much easier. We use fluid dynamics as a case study to demonstrate this learning environment.

关键词： Computational modeling Physics computing Visualization computer networks Distributed computing virtual reality Educational technology Testing Educational institutions Collaboration

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Cloud simulation in virtual environments

Cloud simulation in virtual environments

引用

IEEE Annual International Symposium virtual reality

作者： M. Unbescheiden A. Trembilski Department for Visualization & Virtual Reality Fraunhofer Institute of Computer Graphics Research (IGD) Darmstadt Germany

In this paper, we present a new method of simulating and visualizing smoke and steam clouds in virtual environments (VEs). We use a particle system approach, but reduce the particle numbers to decrease the computation and rendering times. Special care, however is taken for the presentation quality of the clouds. From every viewing point (even within the clouds), the VE user does not have the impression that the clouds are hollow polyhedrons, but rather fuzzy objects.

关键词： Clouds Computational modeling virtual environment Animation Data visualization Urban planning Fires Layout virtual reality computer graphics

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Advances in Visual Computing 1

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丛书名： Lecture Notes in computer Science

1000年

作者： George Bebis Richard Boyle Bahram Parvin Darko Koracin Ronald Chung Riad Hammoud Muhammad Hussain Tan Kar-Han Roger Crawfis Daniel Thalmann David Kao Lisa Avila

ISBN: (数字)9783642172892

ISBN: (纸本)9783642172885

It is with great pleasure that we present the proceedings of the 6th Inter- tional, Symposium on Visual Computing (ISVC 2010), which was held in Las Vegas, Nevada. ISVC provides a common umbrella for the four main areas of visual computing including vision, graphics, visualization, and virtual reality. The goal is to provide a forum for researchers, scientists, engineers, and pr- titioners throughout the world to present their latest research ?ndings, ideas, developments, and applications in the broader area of visual computing. This year, the program consisted of 14 oral sessions, one poster session, 7 special tracks, and 6 keynote presentations. The response to the call for papers was very good; we received over 300 submissions for the main symposium from which we accepted 93 papers for oral presentation and 73 papers for poster p- sentation. Special track papers were solicited separately through the Organizing and Program Committees of each track. A total of 44 papers were accepted for oral presentation and 6 papers for poster presentation in the special tracks.

关键词： Pattern Recognition Computational Biology/Bioinformatics computer graphics computer Imaging, Vision, Pattern Recognition and graphics Image Processing and computer Vision User Interfaces and Human computer Interaction

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Advances in Visual Computing 1

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丛书名： Lecture Notes in computer Science

1000年

作者： George Bebis Richard Boyle Bahram Parvin Darko Koracin Charless Fowlkes Sen Wang Min-Hyung Choi Stephan Mantler Jürgen Schulze Daniel Acevedo Klaus Mueller Michael Papka

ISBN: (数字)9783642331794

ISBN: (纸本)9783642331787

The two volume set LNCS 7431 and 7432 constitutes the refereed proceedings of the 8th International Symposium on Visual Computing, ISVC 2012, held in Rethymnon, Crete, Greece, in July 2012. The 68 revised full papers and 35 poster papers presented together with 45 special track papers were carefully reviewed and selected from more than 200 submissions. The papers are organized in topical sections: Part I (LNCS 7431) comprises computational bioimaging; computer graphics; calibration and 3D vision; object recognition; illumination, modeling, and segmentation; visualization; 3D mapping, modeling and surface reconstruction; motion and tracking; optimization for vision, graphics, and medical imaging, HCI and recognition. Part II (LNCS 7432) comprises topics such as unconstrained biometrics: advances and trends; intelligent environments: algorithms and applications; applications; virtual reality; face processing and recognition.

关键词： Pattern Recognition computer graphics Image Processing and computer Vision User Interfaces and Human computer Interaction Information Systems Applications (incl. Internet) Computational Biology/Bioinformatics

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Advances in Visual Computing 1

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丛书名： Lecture Notes in computer Science

1000年

作者： George Bebis Richard Boyle Bahram Parvin Darko Koracin Ronald Chung Riad Hammound Muhammad Hussain Tan Kar-Han Roger Crawfis Daniel Thalmann David Kao Lisa Avila

ISBN: (数字)9783642172748

ISBN: (纸本)9783642172731

关键词： Software Engineering/Programming and Operating Systems Life Sciences, general Pattern Recognition Computational Biology/Bioinformatics computer graphics computer Imaging, Vision, Pattern Recognition and graphics

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Advances in Visual Computing 1

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丛书名： Lecture Notes in computer Science

1000年

作者： George Bebis Richard Boyle Bahram Parvin Darko Koracin Ronald Chung Riad Hammound Muhammad Hussain Tan Kar-Han Roger Crawfis Daniel Thalmann David Kao Lisa Avila

ISBN: (数字)9783642172779

ISBN: (纸本)9783642172762

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Advances in Visual Computing 1

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丛书名： Lecture Notes in computer Science

1000年

作者： George Bebis Richard Boyle Bahram Parvin Darko Koracin Charless Fowlkes Sen Wang Min-Hyung Choi Stephan Mantler Jürgen Schulze Daniel Acevedo Klaus Mueller Michael Papka

ISBN: (数字)9783642331916

ISBN: (纸本)9783642331909

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