GreenLab is a structural-functional model for plant growth and visualization.It differs from other current work on plant growth model simulation,such as fractals and L-systems.GreenLab model has to satisfy both the feature of constructive(shape-like) and of functional(quantity-like),which means that not only plant model has to be faithful to botany,but also the final production should be appropriate with the real result.such as the total area o f all leaves and their distributions in the crown.So for all the organs from plant organ library, they should always keep some important geometric properties to be normalized,and what's more,the position and direction of the organ in the local coordinates should be in a standard form,which makes the transformation and deformation easier. According to above requirements,in this work we develop a powerful software tool,named as"GreenLab-Organ".The objective is to model plant leaves,simple fruit and simple standard branch,and mainly on leaves.The following are my contributions: 1. Import 2D leaves pictures as the background of 2D edit field to enhance the efficiency and reality.This tool provides automatic,interactive,or their combined functions for a fast geometric modeling of plant organs.Here also it can Offer texture information for modeled leaves. 2. Specially discuss some rules about LOD and leaf polygon simplifications. 3. Specific attention is made to the normalization of all types of organs.For leaf projection from 2D onto 3D surfaces,we offer three types,that is, ellipsoid,hyperbola and Bezier surfaces.Also we manage to model simple fruit shape and branch shape. This software provides a basic editing tool for modeling various plant organs with a user-friendly interface.And the output of this software is the fundamental of future visualization work under GreenLab.
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