The Community for Technology Leaders
RSS Icon
Subscribe
Issue No.05 - September/October (1993 vol.13)
pp: 78-83
ABSTRACT
<p>Two techniques to speed up shadow computations in ray tracing are examined. The first, atomic adaptive sampling, is intended for any light type, such as directional, spot, point, linear, and area lights, in antialiasing, while the second, plane-vertex checking, specifically accelerates shadow computation of linear and area lights. The basic ideas can be extended to other ray types and, for the plane-vertex check, to radiosity applications as well. Existing surveys explain the fundamentals and provide references to intersection culler and shadow algorithms.</p>
CITATION
Andrew Woo, "Efficient Shadow Computations in Ray Tracing", IEEE Computer Graphics and Applications, vol.13, no. 5, pp. 78-83, September/October 1993, doi:10.1109/38.232102
REFERENCES
1. T. Whitted, "An Improved Illumination Model for Shaded Display,"Comm. ACM, Vol. 23, No. 6, June 1980, pp. 343- 349.
2. A. Woo, P. Poulin, and A. Fournier, "A Survey of Shadow Algorithms,"IEEE CG&A, Vol. 10, No. 6, Nov. 1990, pp. 13-32.
3. T. Akimoto, K. Mase, and Y. Suenaga, "Pixel-Selected Ray Tracing,"IEEE CG&A, Vol. 11, No. 4, July 1991, pp. 14-22.
4. J.T. Kajiya, "The Rendering Equation,"Computer Graphics(Proc. Siggraph), Vol. 20, No. 4, Aug. 1986, pp. 143-150.
5. R.L. Cook, T. Porter, and L. Carpenter, "Distributed Ray Tracing,"Computer Graphics(Proc. SIGGRAPH), July 1984, pp. 137-145.
6. P. Poulin and J. Amanatides, "Shading and Shadowing with Linear Light Sources,"Proc. Eurographics, Elsevier, North Holland, 1990, pp. 377-386.
7. K. Picott, "Extensions of the Linear and Area Lighting Models,"IEEE CG&A, Vol. 12, No. 2, March 1992, pp. 31-38.
8. D. Whitley and N. Karunanithi, "Improving generalization in feed-forward neural networks,"Proc. IJCNN, vol. II, pp. 77-82, July 1991.
9. J. Amanatides and A. Woo, "A Fast Voxel Traversal Algorithm for Ray Tracing,"Proc. Eurographics, Elsevier, North Holland, Aug. 1987, pp. 1-10.
10. P. Heckbert and P. Hanrahan, "Beam Tracing Polygonal Objects,"Computer Graphics(Proc. SIGGRAPH), Vol. 18, No. 3, July 1984, pp. 119-127.
11. M.E. Lee, R.A. Redner, and S.P. Uselton, "Statistically Optimized Sampling for Distributed Ray Tracing,"Computer Graphics(Proc. SIGGRAPH), July 1985, pp. 61-67.
12. P. Shirley, "A Ray Tracing Method for Illumination Calculation in Diffuse-Specular Scenes,"Graphics Interface 90, May 1990, pp. 205-212.
13. E. Haines and J. Wallace, "Shaft Culling for Efficient Ray-Traced Radiosity,"Eurographics Workshop on Rendering, E. Jansen, ed., Springer-Verlang, Berlin, May 1991, pp. 13-25.
22 ms
(Ver 2.0)

Marketing Automation Platform Marketing Automation Tool