منابع مشابه
Fast ray tracing of sequences by ray history evaluation
We present a method to reduce the time needed to render a sequence of ray traced images. We exploit the temporal and spatial coherence between consecutive frames. The algorithm does not only inspect the image plane in order to nd regions with minor changes; the object space is analyzed by evaluating the so called ray history. With this method we obtain a speedup in the range of 1.2 to 2.8 almos...
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Throughout the history of computer graphics, a very active area of research has been the attempt to create convincing, life-like images. Ray tracing is a technique for generating photorealistic images, and can easily support a wide range of natural phenomenon. However, producing a ray traced image is very expensive; and producing a ray traced animation is often prohibitively expensive. This the...
متن کاملRay-tracing and Interferometry in Schwarzschild Geometry
Here, we investigate the possible optical anisotropy of vacuum due to gravitational field. In doing this, we provide sufficient evidence from direct coordinate integration of the null-geodesic equations obtained from the Lagrangian method, as well as ray-tracing equations obtained from the Plebanski’s equivalent medium theory. All calculations are done for the Schwarzschild geometry, which resu...
متن کاملRay Interpolants for Fast Ray-Tracing Reflections and Refractions
To render an object by ray tracing, one or more rays are shot from the viewpoint through every pixel of the image plane. For reflective and refractive objects, especially for multiple levels of reflections and/or refractions, this requires many expensive intersection calculations. This paper presents a new method for accelerating ray-tracing of reflective and refractive objects by substituting ...
متن کاملFast Ray - Tracing for Field Strength
Fast Ray-Tracing for Field Strength Prediction in Cellular Mobile Network Planning Kurt Tutschku and Kenji Leibnitz Institute of Computer Science, University of W urzburg Am Hubland, D-97074 W urzburg, Germany Tel.: +49-931-8885513, Fax: +49-931-8884601 E-mail: [tutschkujleibnitz]@informatik.uni-wuerzburg.de Abstract: In this paper we present a fast ray-tracing technique with scalable approxi...
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ژورنال
عنوان ژورنال: ACM SIGGRAPH Computer Graphics
سال: 1987
ISSN: 0097-8930
DOI: 10.1145/37402.37409