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@InProceedings{FernandesWalt:2020:BuLBCo,
               author = "Fernandes, Igor Batista and Walter, Marcelo",
          affiliation = "{Universidade Federal do Rio Grande do Sul} and {Universidade 
                         Federal do Rio Grande do Sul}",
                title = "A Bucket LBVH Construction and Traversal Algorithm for Volumetric 
                         Sparse Data",
            booktitle = "Proceedings...",
                 year = "2020",
               editor = "Musse, Soraia Raupp and Cesar Junior, Roberto Marcondes and 
                         Pelechano, Nuria and Wang, Zhangyang (Atlas)",
         organization = "Conference on Graphics, Patterns and Images, 33. (SIBGRAPI)",
            publisher = "IEEE Computer Society",
              address = "Los Alamitos",
             keywords = "Volumetric rendering, BVH, LBVH.",
             abstract = "Many volumetric rendering algorithms use spatial 3D grids as the 
                         underlying data structure. Efficient representation, construction, 
                         and traversal of these grids are essential to achieve real-time 
                         performance, particularly for time-varying data such as in fluid 
                         simulations. In this paper, we present improvements on algorithms 
                         for building and traversing Bounding Volume Hierarchies (BVH) 
                         designed for sparse volumes. Our main insight was to simplify data 
                         layout representation by grouping voxels in buckets, preserving 
                         their spatiality using Morton codes, instead of using bricks, as 
                         current solutions use. Our solution does not use pointers nor 
                         stacks, allowing for its usage directly on computing shaders and 
                         provides, on average, 9.3x improvement in construction speed, 
                         compared with state-of-the-art approaches for Linear Bounding 
                         Volume Hierarchies (LBVH).",
  conference-location = "Virtual",
      conference-year = "Nov. 7-10, 2020",
             language = "en",
           targetfile = "Bucket_LBVH.pdf",
        urlaccessdate = "2020, Nov. 28"
}


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