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Start date: 2020 × Subject: Design × End date: 2021 ×

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    Evaluation of Mesh Compression and GPU Ray Casting for Tree Based AMR data in VTK
    (The Eurographics Association, 2020) Roche, Antoine; Dubois, Jérôme; Byška, Jan and Jänicke, Stefan
    Adaptive Mesh Refinement (AMR) methods are common in scientific workloads, and very useful during analyses and visualization. In this work, we aim to reduce memory and storage footprint of AMR data. We adapt tree compression (SVDAG) and GPU Ray Cast rendering, created for Computer Graphics surface scenes, for volume data from Scientific Visualization workloads. In particular, experiments have been conducted with the native Tree-Based AMR (TB-AMR) data structure in the Visualization ToolKit (VTK): vtkHyperTreeGrid (HTG). A HTG to SVDAG online converter has been implemented as well as a multi-SVDAG extension. Results showed several orders of magnitude memory footprint reduction thanks to the compression and efficient Ray Cast rendering. Furthermore, serialization to SVDAG enabled almost instant loading and display of simulation data instead of minutes. Overall our experiments show great benefits, and this shows great promises to further improve TB-AMR analyses.
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    Support for inferring user abilities for multimodal applications
    (The Eurographics Association, 2021) Duarte, Carlos; Feiteira, Pedro; Costa, Daniel; Costa, David; Mealha, Óscar and Madeira, Joaquim and Tércio, Daniel and Sousa Santos, Beatriz
    Multimodal interaction offers users the possibility to interact with computational systems using natural interaction modes. However, different users interact differently, integrating modalities in different patterns. By knowing how users exploit different modalities, we can try to build adaptive systems that will increase the effectiveness of multimodal interaction. For that we need to characterize user abilities. However, this is a time and effort consuming process, particularly in the early stages of design. We propose an approach that can be used in the early stages of the design process, by resorting to a Wizard of Oz based prototype of a multimodal system.
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    3D Sound for Digital Cultural Heritage
    (The Eurographics Association, 2021) Musanovic, Adnan; Mijatovic, Bojan; Rizvic, Selma; Hulusic, Vedad and Chalmers, Alan
    Virtual Reality enables the users to experience cultural heritage. Time travel through past times is transferring us in virtual environments with 3D reconstructions of cultural monuments inhabited by historical characters. The full immersion in this different reality can be achieved only with proper spatialization of sound. In this paper we discuss the related work in 3D sound implementation for digital cultural heritage applications and compare it with our experiences.