Browsing by Title
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Ray Classification for Accelerated BVH Traversal
(The Eurographics Association and John Wiley & Sons Ltd., 2019)For ray tracing based methods, traversing a hierarchical acceleration data structure takes up a substantial portion of the total rendering time. We propose an additional data structure which cuts off large parts of the ... -
Ray Coherence Between a Sphere and a Convex Polyhedron
(Blackwell Science Ltd and the Eurographics Association, 1992)Using the two ray coherence theorems of Ohta and Maekawa the computation time of ray tracing algorithms for scenes of spheres and convex polyhedra can be reduced considerably. This paper presents further theorems which, ... -
Ray Differentials and Multiresolution Geometry Caching for Distribution Ray Tracing in Complex Scenes
(Blackwell Publishers, Inc and the Eurographics Association, 2003)When rendering only directly visible objects, ray tracing a few levels of specular reflection from large, low-curvaturesurfaces, and ray tracing shadows from point-like light sources, the accessed geometry is coherentand ... -
The Ray Engine
(The Eurographics Association, 2002)Assisted by recent advances in programmable graphics hardware, fast rasterization-based techniques have made significant progress in photorealistic rendering, but still only render a subset of the effects possible with ray ... -
Ray Maps for Global Illumination
(The Eurographics Association, 2005)We describe a novel data structure for representing light transport called ray map. The ray map extends the concept of photon maps: it stores not only photon impacts but the whole photon paths. We demonstrate the utility ... -
Ray Reordering Techniques for GPU Ray-Cast Ambient Occlusion
(The Eurographics Association, 2020)Global illumination techniques, such as ambient occlusion, can be performed in a physically accurate way via ray casting. However ambient occlusion rays are incoherent. This means their computation is divergent causing a ... -
Ray Specialized Contraction on Bounding Volume Hierarchies
(The Eurographics Association and John Wiley & Sons Ltd., 2015)In this paper we propose a simple but effective method to modify a BVH based on ray distribution for improved ray tracing performance. Our method starts with an initial BVH generated by any state-of-the-art offline algorithm. ... -
Ray Tracing an Octree: Numerical Evaluation of the First Intersection
(Blackwell Science Ltd and the Eurographics Association, 1993) -
Ray Tracing and Graphics Standards
(Blackwell Science Ltd and the Eurographics Association, 1992)Existing standards for three-dimensional graphic representations are unable to produce any realistically shaded images (except PHIGS PLUS, which provides discrete shading only). Ray Tracing or Radiosity are not taken into ... -
Ray Tracing Animated Scenes using Motion Decomposition
(The Eurographics Association and Blackwell Publishing, Inc, 2006)Though ray tracing has recently become interactive, its high precomputation time for building spatial indices usually limits its applications to walkthroughs of static scenes. This is a major limitation, as most applications ... -
A Ray Tracing Approach to Diffusion Curves
(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
(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
(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
(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
(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
(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, 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
(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
(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
(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 ...