M. Magallón, M. Hopf and T. Ertl, Parallel Volume Rendering using PC Graphics Hardware. Proceedings of the 2001 Pacific Graphics Conference, 2001. [pdf]
This paper describes an architecture that enables the use of commodity off the shelf graphics hardware along with high speed network devices for distributed volume rendering. Several PCs drive a number of graphic accelerator boards using an OpenGL interface. The frame buffers of the cards are read back and blended together for final presentation on a single PC working as front end. We explain how the attainable frame rates are limited by the transfer speeds over the network as well as the overhead implied by having to blend several images together limits . An initial implementation using four graphic cards achieves frame rates similar to those of high performance visualization systems.
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S. Stegmaier, M. Magallón and T. Ertl, A Generic Solution for Hardware-Accelerated Remote Visualization Procceedings of EG/IEEE TCVG Symposium on Visualization VisSym '02, 2002 [pdf]
This paper presents a generic solution for hardware-accelerated remote visualization that works transparently for all OpenGL-based applications and OpenGL-based scene graphs. Universality is achieved by taking advantage of dynamic linking, efficient data transfer by means of VNC. The proposed solution does not require any modifications of existing applications and allows for remote visualization with different hardware architectures involved in the visualization process. The library s performance is evaluated using standard OpenGL example programs and by volume rendering substantial data sets.
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M. Magallón and J. Páez, Interactive Visualization of Gravitational Lenses Procceedings of Visualization, Modelling and Vision conference '02, 2002 [pdf]
A tool for the interactive study of gravitational lensing is presented. Gravitational lensing is a known astrophysical phenomenon explained by means of the General Relativity Theory and it is nowadays the only scale independent method for measuring the mean matter density in the Universe. The gravitational lensing problem along with the associated physics is briefly described. The algorithm used to generate the images is presented alongside with images obtained from the application of different models to a circular source. Some possible future developments are outlined.
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