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Nature in computer graphics
ConclusionThis paper has presented the reader with a selection of issues that need to be taken into account when realistically rendering scenes of nature. Using some sophisticated models it is truly possible to recreate some natural scenes rather accurately. In summation: this paper has educate the reader on what needs to be done and not on the how thereof. Future Work A lot of research is currently going into multiprocessor support for computer image generation which is already exploited to some degree in [11]. Concerning raindrops, work is still going into the simulation of drop collision and reflection. In tree rendering, much work is still being devoted to the correct modeling of leaves and the dynamics of light through the semi-opaque surface thereof. On the subject of atmospheric phenomena, research is being done on the independence of refraction indices to aid in the animation of the effects. Finally, water dynamics are still a long way from perfect even though much progress is being made. Perhaps we should just accept that nature was never truly meant to be fully understood? Or perhaps tomorrow will hold another revelation and another faster implementation. References [1] Lindenmayer A. Developmental systems without cellular interaction, their languages and grammars, Parts i and ii. Journal of Theoretical Biology 1971;30:455–84. [2] Lintermann B, Deussen O. Interactive modeling of plants. IEEE Computer Graphics and Applications 1999;19(1): 56–65. [3] Deussen O, Colditz C, Stamminger M, Drettakis G. Interactive visualization of complex plant ecosystems. In: Proceedings of the IEEE visualization conference, IEEE; 2002. [4] María J. Vincent, Vicente Rosell, Roberto Vivó. A polar-plane based method for natural illumination of plants and trees. In: Computers & Graphics 29 2005; 203-208 [5] Preetham J, Shirley P, Smits B. A practical analytic model for daylight. In: Computer Graphics Proceedings 1999, SIGGRAPH’99, p. 91–100. [6] J.F. Blinn, Simulation of wrinkled surfaces, in: Proceedings of SIGGRAPH’78, Comput. Graph. 12 (3) (1978) 286–292. [7] B. Schachter, Long crested wave models, Comput. Graph. Image Process. 12 (1980) 187–201. [8] M.E. Newell, The Utilization of Procedure Models in Digital Image Synthesis, Ph.D. Thesis, University of Utah, Salt Lake City, UT, 1975. [9] W.T. Reeves, Particle systems—a technique for modeling a Class of fuzzy objects, in: Proceedings of SIGGRAPH’83, Comput. Graph. 17 (3) (1983) 359–376;W.T. Reeves, Particle systems—a technique for modeling a class of fuzzy objects, ACM Trans. Graph. 2 (2) (1983) 91–108. [10] S. Premoze, M. Ashikhmin, Rendering natural waters, in: Proceedings of Pacific Graphics’00, 2000, pp. 23–30; S. Premoze, M. Ashikhmin, Rendering natural waters, Comput. Graph. Forum 20 (4) (2001) 189–199. [11] Pierre Rousseau, Vincent Jolivet, Djamchid Ghazanfarpour. Realistic real-time rain rendering. In: Computers & Graphics 30 2006; 507-518 [12] Ross ON. Optical remote sensing of rainfall micro-structures. Master’s thesis, Freie Universita¨ t Berlin; 2000. In partnership with University of Auckland. [13] Horng-Shyang Liao, Tan-Chi Ho, Jung-Hong Chuang, Cheng-Chung Lin. Fast rendering of dynamic clouds. In: Computers & Graphics 29 2005; 29-40 [14] Dobashi Y, Kaneda K, Yamashita H, Okita T, Nishita T. A simple, efficient method for realistic animation of clouds. In: Proceedings of the SIG-GRAPH’00, 2000. p. 19–28. [15] Dobashi Y, Nishita T, Yamashita H, Okita T. Modeling of clouds from satellite images using meatballs. In: Proceedings of the sixth Pacific conference, 1998. p. 53–60. [16] Kajiya, JT, Herzen BPV. Ray tracing volume densities. In: Proceedings of the SIGGRAPH’84, 1984. p. 165–74. [17] Ebert DS. Procedural volumetric cloud modeling and animation. SIGGRAPH’00 Course Notes 2000;25(5):1–55. [18] Diego Gutierrez, Francisco J. Seron, Adolfo Munoz, Oscar Anson. Simulation of atmospheric phenomena. In: Computers & Graphics [19] USGPC, US Standard Atmosphere. United State Government Printing Office, Washington, DC; 1976. [20] Gladstone J, Dale J. On the influence of temperature on the refraction of light. Philosophical Transactions 1858;148:887.
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