Abstract
Fractal theory is a science newly developed in the past 20 to 30 years, it can describe roughness and irregular geometric shapes in the nature or in non-linear system. Although the shapes of plants various species is difference, they have the common character of self-similarity and self-reproduce. With the development of fractal theory, simulate plants using fractal became an important problem on computer simulate field. The reason is that the fractal geometry can be well described using traditional tools for geometric description will encounter great difficulties complex the natural landscape simulation can be very vivid description of the beauty of nature, was amazing natural features simulated images.
There are two methods for natural scenery simulation, L-system method and IFS system method, making a comparison between the two methods, and implementing 3D scenery fractal generation by means of the visualizing. This paper discusses deeply the scenery structure shape, dynamic generated process in accordance with the characteristics of simple generated law and complicated practice process of L-system. Since the hierarchical traverse calculation is used, the practice process will greatly be simplified, the information transmission speed will be increased, and the information storage will be reduced. For IFS system., by analyzing the typical graphic examples, the natural scenery simulated is more similar to the real object by the triangle method.
Iterated function system (IFS) is one of the main formation ways to generate fractal graphics, and its attractor is good enough to simulate natural objects and scenery, but it is difficult to find the IFS parameters for simulation. In this paper, the fractal theory in computer graphics applications, Fractal - based simulation of natural phenomena technical studies on coniferous tree leaves generation simulation technology. Using Iterated Function System Simulation natural landscape, in OpenGL environment with fractal theory, coniferous map out the three-dimensional plant leaves, and can be from a different perspective here. Through studying simulation of natural phenomena, the basic methodology implemented in the computer simulation of coniferous leaves generation.
Key words： fractal theory；L-system； iteration function system；OpenGL； Coniferous tree leaves
