4719

Hardware-assisted visibility sorting for unstructured volume rendering

S.P. Callahan, M. Ikits, J.L.D. Comba, C.T. Silva
Scientific Computing and Imaging Institute, School of Computing, University of Utah, 50 S. Central Campus Dr., Salt Lake City, UT 84112, USA
IEEE Transactions on Visualization and Computer Graphics, 2005

@article{callahan2005hardware,

   title={Hardware-assisted visibility sorting for unstructured volume rendering},

   author={Callahan, S.P. and Ikits, M. and others},

   journal={IEEE Transactions on Visualization and Computer Graphics},

   pages={285–295},

   year={2005},

   publisher={Published by the IEEE Computer Society}

}

Download Download (PDF)   View View   Source Source   

627

views

Harvesting the power of modern graphics hardware to solve the complex problem of real-time rendering of large unstructured meshes is a major research goal in the volume visualization community. While, for regular grids, texture-based techniques are well-suited for current GPUs, the steps necessary for rendering unstructured meshes are not so easily mapped to current hardware. We propose a novel volume rendering technique that simplifies the CPU-based processing and shifts much of the sorting burden to the GPU, where it can be performed more efficiently. Our hardware-assisted visibility sorting algorithm is a hybrid technique that operates in both object-space and image-space. In object-space, the algorithm performs a partial sort of the 3D primitives in preparation for rasterization. The goal of the partial sort is to create a list of primitives that generate fragments in nearly sorted order. In image-space, the fragment stream is incrementally sorted using a fixed-depth sorting network. In our algorithm, the object-space work is performed by the CPU and the fragment-level sorting is done completely on the GPU. A prototype implementation of the algorithm demonstrates that the fragment-level sorting achieves rendering rates of between one and six million tetrahedral cells per second on an ATI Radeon 9800.
No votes yet.
Please wait...

* * *

* * *

HGPU group © 2010-2017 hgpu.org

All rights belong to the respective authors

Contact us: