Research And 3-D Visualization Of The Individual Tree Modeling-JessTree

3-D (Three Dimensional) Visualization Technique is the most direct way of Computer Vision. It is widely used in areas of education, academic research, and entertainment. But the complexity of the tree's structure always challenges the research on 3-D Forestry Landscape Visualization. However, because the process of tree growth matches the non-linear theory, a 3-D visualization system under this theory can simulate a forestry landscape vision more excellently.This paper makes a wide and deep review and detailed comparison to the theories and techniques used in current most popular 3-D tree modeling software both in mdustry and academic area. Based on this review, it focuses on the 3-D visualization techniques and non-linear theories. Also, combined with the characters of tree shapes and growth, it puts forward a 3-D tree model based on Fractal Method and DLA (Diffusion-limited Aggregation) Method. This 3-D tree model uses L-System algorithm to generate different branch-units, and then applies the DLA algorithm to distribute these branch-units to make a whole tree with natural textures. In Microsoft Visual Studio 2005 integrated with OpenGL and MFC techniques, we create a 3-D tree modeling software named JessTree 1.0, which can efficiently simulate the 3-D shape of the individual tree and an easy forestry landscape as well.Based on L-System algorithm and DLA method, this paper puts forward a new way to define the 3-D tree model, and uses this model to simulate the individual tree and forest by mathematical modeling and programming. JessTree 1.0, a 3-D tree modeling software we developed, is a new experiment on the methods of tree's branches modeling, and can give good suggestions to the further related researches and developments.