Describes how a physical simulation can be integrated with our Responsive Workbench system to support complex assembly tasks involving multiple hands and users. Our system uses the CORIOLIS physical simulation package extended to meet the real-time requirements for our highly interactive virtual environment. We develop a new set of interface tools that exploit the natural properties of physical simulation (i.e. the superposition of forces). Our tools are based on sets of springs connecting the user's hand to a virtual object. Visualizing these springs provides "visual force feedback" of the applied forces and facilitates the prediction of the objects' behavior. Our force-based interaction concept allows multiple hands and users to manipulate a single object without the need for locking the object.

Article The two-user Responsive Workbench: support for collaboration through individual views of a shared space Share on Authors: Maneesh Agrawala Stanford University, Stanford, CA Stanford University, Stanford, CAView Profile , Andrew C. Beers Stanford University, Stanford, CA Stanford University, Stanford, CAView Profile , Ian McDowall Fakespace, Inc., Mountain View, CA Fakespace, Inc., Mountain View, CAView Profile , Bernd Fröhlich Stanford University, Stanford, CA Stanford University, Stanford, CAView Profile , Mark Bolas Fakespace, Inc., Mountain View, CA Fakespace, Inc., Mountain View, CAView Profile , Pat Hanrahan Stanford University, Stanford, CA Stanford University, Stanford, CAView Profile Authors Info & Claims SIGGRAPH '97: Proceedings of the 24th annual conference on Computer graphics and interactive techniquesAugust 1997 Pages 327–332https://doi.org/10.1145/258734.258875Online:03 August 1997Publication History 168citation1,305DownloadsMetricsTotal Citations168Total Downloads1,305Last 12 Months58Last 6 weeks7 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access

As heterogenous computing environments become ubiquitous, the demand for viewing synthetic 3D animations across a wide variety of platforms is increasing. In this paper we present the framework of a compression system for synthetic animations which can be used to view such animations in these environments. While the system is flexible enough to take advantage of any rendering capabilities that may be available at the decoder, it is designed with the intention of viewing such animations on low end computers or set top boxes that may not contain rendering hardware. Our approach takes advantage of the information generated during rendering to guide the compression of it. Our model-based approach to compression for synthetic animations is faster and produces better quality as well as higher compression rates than video compression algorithms, while maintaining the portability of a cheap software based solution. Compressing animations using our system results in both a 25-50% lower bitrate and a 1.5-3.0 dB higher PSNR than using MPEG.

We present a simple method for rendering directly from compressed textures in hardware and software rendering systems.Textures are compressed using a vector quantization (VQ) method.The advantage of VQ over other compression techniques is that textures can be decompressed quickly during rendering.The drawback of using lossy compression schemes such as VQ for textures is that such methods introduce errors into the textures.We discuss techniques for controlling these losses.We also describe an extension to the basic VQ technique for compressing mipmaps.We have observed compression rates of up to 3 5 : 1 , with minimal loss in visual quality and a small impact on rendering time.The simplicity of our technique lends itself to an efficient hardware implementation.

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We present an intuitive interface for painting on unparameterized three-dimensional polygon meshes using a 6D Polhemus space tracker as an input device. Given a physical object we first acquire its surface geometry using a Cyberware scanner. We then treat the sensor of the space tracker as a paintbrush. As we move the sensor over the surface of the physcial object we color the corresponding locations on the scanned mesh. The physical object provides a natural force-feedback guide for painting on the mesh, making it intuitive and easy to accurately place color on the mesh.