The Research On Simulation Of Plant On Virtual Reality

The traditional Euclidian geometry is mainly used to describe regular graphs and smooth curves, but it appears to be powerless when it comes to natural plant Euclidian geometry characterized with irregularity. Fractal, a science newly developed in the past 20 to 30 years, however, can be used to describe roughness and irregular geometric shapes in the nature.Although the shapes of plants are different, they have the common characters like self-similarity and self-reproduction on the whole. Therefore fractal becomes a main description language and theoretical foundation for natural plant simulation. In recent years, with the continuous development of fractal theory, plants modeling using fractal became an important subject in computer simulation field. The L-system, a new approach of plant simulation, which is expanded from fractal became one of the most important methods in plant simulation.The key to simulate the plant with the help of L-system is the rule of production. The appearances of plants are different in nature. In a L-system, it mainly reflects the difference of the rules of productions. The design of the rule of production in a L-system focuses on discreteness traditionally, which didn't fully analyze and summarize its methods.In order to solve some of the problems lie in the design of the rule of production of L-system effectively, this paper presents a solution. Firstly, an in-depth analyze of the current basic principles of the L-system's production is made, which researches the single rule production at first. Simulation of the shapes of plants with single production was made, then to categorize the basic model of the single production. This paper divides these modules into two classes-the one has obvious caudexes and the one hasn't. Simulation experiments were made according to these two models and further researches were conducted based on multi-rules production of the L-system. This paper divides the multi-rules production into three parts, which are basic production, linker production and sub-production. This paper attaches great importance to the researches of the growth of the basic rule, the rate of the sub-modules and the model of the sub-production, meanwhile, researches on the influence of various natural conditions to the shapes of plants were made, and based on these researches a series of corresponding models were designed. Lastly, simulation experiments were conducted based on the programs designed in the platform of VC 6.0. Repeated experiments show that these newly designed models contribute to improve the accuracy of L-system.