Research On Trees And Flowers Modeling

Due to a wide range of species, great diversity of shape, complicated structure and strong characteristics, plants play an important role in the nature scenes. Plant modeling has become an important application area in the computer graphics field. In this paper, the following four main results are achieved.1. In this paper, a plant modeling system based on graphics is designed for users to generate all kinds of plants. The branch growth field and the plant whole growth field are proposed. The branch modeling procedure consists of two main steps: in the first step an iterative method is used to draw different branches, and in the second step a global algorithm is presented to shape the overall silhouette and density of plants. The userss can change the parameters in the modeling processes through the interactive interface. Our system also supports a large number of leaves models generated by plant morphology knowledge, the users can choose one of them or add some new models to the system. The manipulation is simple. Results look natural.2. Flower modeling is based on the principles of plants morphology and graphics technology. The triangular mesh is used to model petals and leaves, at the same time, the polygon is used to generate the flowers stamens and branches. The algorithm of branch and petal is based on the inflorescence and petal arrangement theories. The single-layer and multi-layer petals models can be created by our system. The manipulation is simple. Results look natural.3. The simulation and modeling of nature scenes with thousands of plants have been providing a serious challenge. In this paper, an efficient interactive system is devised for solving this problem and the process of scenes synthesis is decomposed into steps: modeling the individual plants, modeling the terrain, specification the plants distribution, and rendering the landscape. Each step is relatively independent and interrelated. The users can change the date dynamically in the process of modeling. In this paper, a new fractal noise function is used in terrain generation and a new algorithm is presented to describe the natural phenomenon of clustering. The users can use two efficient interactive editors to generate all kinds of terrains and plants. The computer graphic and image techniques are used in rendering to improve the speed of walk-through.4. In this paper, the golden section theory is used in modeling procedure. Plantsare complex structures and change continually, changing their shapes in response toenvironmental factors such as sunlight, water and neighboring plants. However, somemathematical rules can be found in their growth patterns, one of which is the goldensection. The golden section can be observed in branching systems, phyllotaxis,flowers and seeds, and often the spiral arrangement of plant organs. In this study, tree,flower and fruit models have been generated by using the corresponding goldensection characteristics, resulting in more natural patterns. Furthermore, the goldensection can be found in the bifurcate angles of trees and lobed leaves, extending thegolden section theory.