A Low Cost Animation System Applied to Ray Tracing in Liquid Crystals
Animated movies of scientific graphics can be recorded on film with the low-cost system of hardware and software described here. The hardware consists of a 16mm camera, a stepper motor, and a simple cameramotor controller. The software is designed to produce bitmaps from graphical data, combine bitmaps into composite frames, and record frames onto film. The camera is fully controlled by the same graphics workstation that is used to display the images, so that fades and dissolves can be done by software with a camera not designed for such special effects. The graphical data generated on a supercomputer, is subsequently transferred to the workstation where it is stored and recorded frame-by-frame according to a configuration file. A variant of the software, which operates across local and wide area networks, makes use of network computing software to send computationally intensive tasks to a remote supercomputer or to other workstations in a distributed computing environment. We have used the system to simulate polarized light microscope images of liquid crystals according to a single-scattering ray-tracing theory.
KeywordsTate Halide Photography Prolate Dupin
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- 1.Bellare, J. R., Davis, H. T., Miller, W. G., and Scriven, L. E., Polarized optical microscopy of anisotropic media: Imaging theory and simulation, J. Colloid and Interf. Sci (1990), (in press).Google Scholar
- 2.Anderson, D. M., Davis, H. T., Nitsche, J. C. C., and Scriven, L. E., Periodic surfaces of prescribed mean curvature, Advances in Chemical Physics (1989), (in press).Google Scholar
- 3.Maxwell, J. C., On the cyclide, Quart. J. Pure and Appl. Math. 9 (1869), 111–126.Google Scholar
- 4.Dupin, Charles, Applications de geometrie et de mechanique, a la marine, aux ponts et chaussees, etc., pour faire suite aux developpements de geometrie, Batchelier, Paris (1822).Google Scholar
- 5.Johnston, W. E., Hall, D. E., Renema, F., and Robertson, D., Principles and techniques for low cost computer generated video movies, LBL-22330, Univ. of California, Lawrence Berkeley Laboratory, Berkeley, CA (1987).Google Scholar
- 6.Johnston, W. E., Hall, D. E., Huang, J., Rible, M., and Robertson, D., Distributed scientific video movie making, LBL-24996, Univ. of California, Lawrence Berkeley Laboratory, Berkeley, CA (1988).Google Scholar
- 7.Neblette, C. B., “Photography: Its Materials and Processes,” 5th ed. Van Nostrand (New York), 1952, p. 317.Google Scholar
- 8.Higgins, G. C., Information capacity of photographic materials, in “Photographic Systems for Engineers,” ed. by Brown, F. M., Hall, H. J., and Kosar, J., Society of Photographic Scientists and Engineers (Washington D.C.) (1966), p. 202.Google Scholar
- 9.Christiansen, H., Stephenson, M., Nay, B., and Grimsrud, A., “Movie.byu Training Text,” 2nd edition, Bookcrafters, 1987.Google Scholar
- 10.MacDonald, J. A., Bergstrom, P. P., Bellare, J. R., Scriven, L. E., and Davis, H. T., A low-cost film-based animation system for visualizing scientific data utilizing distributed computing, (in preparation).Google Scholar
- 11.Apollo Computer Inc., “Network Computing System Reference,” Order No. 010200 Revision 00, Chelmsford, MA 01824, 1987.Google Scholar