Now showing items 12096-12115 of 17196

    • A Ray Tracing Approach to Diffusion Curves 

      Bowers, John C.; Leahey, Jonathan; Wang, Rui (The Eurographics Association and Blackwell Publishing Ltd., 2011)
      Diffusion curves [OBW*08] provide a flexible tool to create smooth-shaded images from curves defined with colors. The resulting image is typically computed by solving a Poisson equation that diffuses the curve colors to ...
    • Ray Tracing Dynamic Scenes using Selective Restructuring 

      Yoon, Sung-Eui; Curtis, Sean; Manocha, Dinesh (The Eurographics Association, 2007)
      We present a novel algorithm to selectively restructure bounding volume hierarchies (BVHs) for ray tracing dynamic scenes. We derive two new metrics to evaluate the culling efficiency and restructuring benefit of any BVH. ...
    • Ray Tracing Dynamic Scenes with Shadows on the GPU 

      Guntury, Sashidhar; Narayanan, P. J. (The Eurographics Association, 2010)
      We present fast ray tracing of dynamic scenes in this paper with primary and shadow rays. We present a GPUfriendly strategy to bring coherency to shadow rays, based on previous work on grids as acceleration structures. We ...
    • Ray Tracing Generalized Tube Primitives: Method and Applications 

      Han, Mengjiao; Wald, Ingo; Usher, Will; Wu, Qi; Wang, Feng; Pascucci, Valerio; Hansen, Charles D.; Johnson, Chris R. (The Eurographics Association and John Wiley & Sons Ltd., 2019)
      We present a general high-performance technique for ray tracing generalized tube primitives. Our technique efficiently supports tube primitives with fixed and varying radii, general acyclic graph structures with bifurcations, ...
    • Ray Tracing Lossy Compressed Grid Primitives 

      Benthin, Carsten; Vaidyanathan, Karthik; Woop, Sven (The Eurographics Association, 2021)
      We propose a new watertight representation of geometry for ray tracing highly complex scenes in a memory efficient manner. Polygon meshes in the scene are first converted into compressed grid primitives, which are represented ...
    • RAY TRACING OBJECTS DEFINED BY SWEEPING A SPHERE 

      Wijk, J.J. van (The Eurographics Association, 1984)
      The basic calculation underlying ray tracing is that of the intersection of a line with the surfaces of an object. A method is presented here for performing this calculation for a new and powerful class of objects, those ...
    • Ray tracing of dynamic scenes 

      Günther, Johannes (Günther, Johannes, 2014-10-24)
      In the last decade ray tracing performance reached interactive frame rates for nontrivial scenes, which roused the desire to also ray trace dynamic scenes. Changing the geometry of a scene, however, invalidates ...
    • Ray Tracing of Large Models on a Multi-Projection Display 

      Costa, Vasco; Pereira, João M.; Jorge, Joaquim A. (The Eurographics Association, 2021)
      O uso de écrans de grande dimensão, no nosso caso uma 'display wall' multi-projector, tem vindo a aumentar. Quando vários utilizadores precisam de visualizar uma cena ou quando um único utilizador necessita de obter uma ...
    • Ray Tracing Polynomial Tensor Product Surfaces 

      Giger, Christine (Eurographics Association, 1989)
      With regard to ray tracing algorithms for polynomial tensor product surfaces, the most timecritical step is to find an intersection point of a ray and a surface. In this case it proves to be very difficult to decide whether ...
    • Ray Tracing Rational B-Spline Patches in VLSI 

      Schneider, Bengt-Olaf (The Eurographics Association, 1987)
      Rational B-spline surfaces make it possible to merge the concepts of freeform surfaces and that of surfaces described by rational polynomials especially conic sections. For ray tracing it is crucial to determine the ...
    • Ray Tracing Spherical Harmonics Glyphs 

      Peters, Christoph; Patel, Tark; Usher, Will; Johnson, Chris R. (The Eurographics Association, 2023)
      Spherical harmonics glyphs are an established way to visualize high angular resolution diffusion imaging data. Starting from a unit sphere, each point on the surface is scaled according to the value of a linear combination ...
    • Ray Tracing Surfaces with Contours 

      Balsys, Ronald J.; Suffern, Kevin G. (Blackwell Publishing, Inc and Eurographics Association, 2003)
      We present two algorithms for ray tracing surfaces with contour lines that are level surfaces of scalar fields. One algorithm renders the contours as bands of constant finite width, while the other renders them as one ...
    • Ray Tracing Triangular Bezier Patches 

      Roth, S. H. Martin; Diezi, Patrick; Gross, Markus H. (Blackwell Publishers Ltd and the Eurographics Association, 2001)
      We present a new approach to finding ray-patch intersections with triangular Bernstein-Bezier patches of arbitrary degree. This paper extends and complements on the short presentation17 . Unlike a previous approach which ...
    • Ray Tracing using Hierarchies of Slab Cut Balls 

      Källberg, Linus; Larsson, Thomas (The Eurographics Association, 2010)
      In this paper, bounding volume trees of slab cut balls are evaluated and compared with other types of trees for ray tracing. A novel tree construction algorithm is proposed, which utilizes a relative orientation heuristic ...
    • Ray Traversal of Spatial Structures 

      Kuzmin, Yevgeniy P. (Blackwell Science Ltd and the Eurographics Association, 1994)
      This article presents an efficient algorithm for ray traversal of uniform and hierarchical spatial structures. Only simple integer and logical operations are used. The problem of error accumulation during ray casting is ...
    • Ray-aligned Occupancy Map Array for Fast Approximate Ray Tracing 

      Zeng, Zheng; Xu, Zilin; Wang, Lu; Wu, Lifan; Yan, Ling-Qi (The Eurographics Association and John Wiley & Sons Ltd., 2023)
      We present a new software ray tracing solution that efficiently computes visibilities in dynamic scenes. We first introduce a novel scene representation: ray-aligned occupancy map array (ROMA) that is generated by rasterizing ...
    • Ray-Casted BlockMaps for Large Urban Models Visualization 

      Cignoni, P.; Di Benedetto, M.; Ganovelli, F.; Gobbetti, E.; Marton, F.; Scopigno, R. (The Eurographics Association and Blackwell Publishing Ltd, 2007)
      We introduce a GPU-friendly technique that efficiently exploits the highly structured nature of urban environments to ensure rendering quality and interactive performance of city exploration tasks. Central to our approach ...
    • A Ray-Slice-Sweep Volume Rendering Engine 

      Bitter, Ingmar; Kaufman, Arie (The Eurographics Association, 1997)
      Ray-slice-sweeping is a plane sweep algorithm for volume rendering, The compositing buffer sweeps through the volume and combines the accumulated image with the new slice of just-projected voxels. The image combination is ...
    • Ray-Traced Collision Detection: Interpenetration Control and Multi-GPU Performance 

      Lehericey, Francois; Gouranton, Valérie; Arnaldi, Bruno (The Eurographics Association, 2013)
      We proposed in [LGA13] an iterative ray-traced collision detection algorithm (IRTCD) that exploits spatial and temporal coherency and proved to be computationally efficient but at the price of some geometrical approximations ...
    • Ray-Tracing Controlavel Interactivamente para producao de Imagens de realismo crescente 

      Sousa, A. Augusto; Costa, A. Cardoso; Leitão, João Miguel; Ferreira, F. Nunes (The Eurographics Association, 2023)
      A geração de imagens com elevado nível de realismo por meio de um algoritmo de Ray-Tracing convencional. em sistemas de CAD, está totalmente fora de questão se considerarmos os requisitos ao nível da interactividade na ...