Browsing by Author "Bagur, P.D."

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    Improved quadric surface impostors for large bio-molecular visualization
    (2012) Bagur, P.D.; Shivashankar, N.; Natarajan, V.
    The shape of biomolecules, such as proteins, may be represented using different representations like space-fill, ballstick, backbone, or secondary structures. The secondary structure of proteins, comprising of sheet-like, helix-like and loops structures, represent a higher level abstraction of its structure. With ever increasing sizes of protein structure data produced by high resolution x-ray crystallography and cryo-electron microscopy, biologists often rely on visualizations to better understand the overall structure of proteins. In this paper, we present a unified framework for accelerating the rendering of various representations of these structure using GPUs. The framework first produces "impostor primitives", which are simple linear element approximations of quadric objects, such as spheres, cylinders, and helices. Next, the rasterizations of the impostors are corrected to produce pixel-precise renderings of the quadric objects. We incorporate this framework into a bio-molecular visualization tool proteinvis to demonstrate quantitative and qualitative performance gains over earlier approaches for rendering various representations of proteins. � 2012 ACM.
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    Improved quadric surface impostors for large bio-molecular visualization
    (2012) Bagur, P.D.; Shivashankar, N.; Natarajan, V.
    The shape of biomolecules, such as proteins, may be represented using different representations like space-fill, ballstick, backbone, or secondary structures. The secondary structure of proteins, comprising of sheet-like, helix-like and loops structures, represent a higher level abstraction of its structure. With ever increasing sizes of protein structure data produced by high resolution x-ray crystallography and cryo-electron microscopy, biologists often rely on visualizations to better understand the overall structure of proteins. In this paper, we present a unified framework for accelerating the rendering of various representations of these structure using GPUs. The framework first produces "impostor primitives", which are simple linear element approximations of quadric objects, such as spheres, cylinders, and helices. Next, the rasterizations of the impostors are corrected to produce pixel-precise renderings of the quadric objects. We incorporate this framework into a bio-molecular visualization tool proteinvis to demonstrate quantitative and qualitative performance gains over earlier approaches for rendering various representations of proteins. © 2012 ACM.
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    Real time visualization of large data using clustered projections
    (2014) Bagur, P.D.
    Modern graphics systems rely on many techniques to achieve interactive frame-rates for rendering large and complex scenes. Impostoring is a popular technique where rendering of repetitive geometry is optimized by leveraging pre-calculated information for each type of repeated geometry. This paper discusses a view independent impostor-algorithm that stores the sampled projections of a given surface in a clustered format. The implications of such a format on the rendering performance and storage are discussed along with some of its advantages like selective adjustment of level of detail and shadowing. � 2014 Springer International Publishing.
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    Real time visualization of large data using clustered projections
    (Springer Verlag service@springer.de, 2014) Bagur, P.D.
    Modern graphics systems rely on many techniques to achieve interactive frame-rates for rendering large and complex scenes. Impostoring is a popular technique where rendering of repetitive geometry is optimized by leveraging pre-calculated information for each type of repeated geometry. This paper discusses a view independent impostor-algorithm that stores the sampled projections of a given surface in a clustered format. The implications of such a format on the rendering performance and storage are discussed along with some of its advantages like selective adjustment of level of detail and shadowing. © 2014 Springer International Publishing.