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CPU Isosurface Ray Tracing of Adaptive Mesh Refinement Data.

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    Visualizing adaptive mesh refinement (AMR) data is challenging. This study introduces the octant method and a hybrid ray-tracing approach for high-quality, interactive isosurface rendering of block-structured AMR data.

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    Area of Science:

    • Scientific Visualization
    • Computational Science
    • Computer Graphics

    Background:

    • Adaptive Mesh Refinement (AMR) enables efficient large-scale simulations by adaptively adjusting mesh resolution, saving computational resources.
    • Visualizing AMR data is complex due to hierarchical structures and challenges in reconstructing continuous field values.

    Purpose of the Study:

    • To develop a comprehensive solution for interactive isosurface rendering of block-structured AMR data.
    • To improve the quality and performance of AMR data visualization.

    Main Methods:

    • Introduced a novel 'octant method' for continuous, adaptive, and simple reconstruction of AMR data.
    • Developed a hybrid implicit isosurface ray-tracing method for enhanced rendering quality and performance.
    • Integrated the octant method and hybrid geometry into OSPRay as a module for combined volume and isosurface visualization.

    Main Results:

    • The octant method provides a continuous and adaptive approach to AMR data reconstruction.
    • The hybrid ray-tracing method outperforms existing sampling-based approaches in rendering quality and performance.
    • The integrated OSPRay module enables high-quality interactive visualizations of block-structured AMR data.

    Conclusions:

    • The proposed octant method and hybrid ray-tracing technique offer an effective solution for visualizing complex AMR data.
    • The developed OSPRay module facilitates high-quality interactive rendering of gigascale block-structured AMR datasets.
    • This work advances the field of scientific visualization for large-scale simulation data.