“Progressive volume rendering of unstructured grids on modern GPUs” by Callahan, Bavoil, Pascucci and Silva

  • ©Steven P. Callahan, Louis Bavoil, Valerio Pascucci, and Claudio T. Silva




    Progressive volume rendering of unstructured grids on modern GPUs



    We have developed a new progressive technique that allows real-time volume rendering of large tetrahedral meshes. Our approach incrementally streams portions of the mesh to a hardware-assisted volume renderer and displays approximations that increase in quality until a full-quality rendering is achieved. The results of previous steps are stored as image data and re-used in each subsequent refinement, thus leading to an efficient rendering. Our interactive representation of the dataset is efficient, light-weight, and high quality. The result is a level-of-detail framework for interactive exploration of tetahedral datasets too large to render using conventional approaches.


    1. Callahan, S. P., Ikits, M., Comba, J. L., and Silva, C. T. 2005. Hardware-assisted visibility ordering for unstructured volume rendering. IEEE Transactions on Visualization and Computer Graphics 11, 3, 285–295.
    2. Callahan, S. P., Bavoil, L., Pascucci, V., and Silva, C. T. 2006. Progressive volume rendering of large unstructured grids. Technical Report UUSCI-2006-019, Scientific Computing and Imaging Institute, University of Utah.

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