Individual plant is modeled with parametric and random context sensitive l - system 單株植物的造型則是采用上下文有關(guān)的帶參數(shù)的隨機(jī)l系統(tǒng)。
In chapter iv , we illustrate number systems of system i - xii , which give a further proof to the theorem on the structure of the system and 121 kinds of global phase portraits 第四章對(duì)系統(tǒng)l系統(tǒng)12的全局結(jié)構(gòu)進(jìn)行了數(shù)字系統(tǒng)舉例,進(jìn)一步以實(shí)例驗(yàn)證了雙扇形區(qū)域分類定理及系統(tǒng)的全局拓?fù)浣Y(jié)構(gòu)
We design a complier of parametric and random context sensitive l - system to simulate the development of plants and interpret the rules that decide the way plants grow . we also extend the l - system with the environment factor 我們?yōu)槟M植物生長而編寫了l系統(tǒng)編譯器來實(shí)現(xiàn)可定義規(guī)則的植物造型,并把隨機(jī)因子和環(huán)境參數(shù)擴(kuò)充到l系統(tǒng)中。
In this thesis , our research work mainly focuses on the following four aspects : 1 , studying and perfecting the generation algorithms of plant modeling , building three - dimensional plant model on the basis of studying current algorithms of plant modeling , combining iterated function system and l - system , we brought forward the random binary three - dimensional recursive model 本文的主要工作內(nèi)容集中在以下四方面: 1 、研究并改進(jìn)植物建模算法,生成三維的植物模型在研究目前植物建模常用算法的基礎(chǔ)上,結(jié)合迭代函數(shù)系統(tǒng)法( ifs )和l系統(tǒng)法提出了樹木類植物的隨機(jī)二叉三維遞歸模型。
In this article we discuss the methods of 3d tree modeling by iteration function system ( ifs ) and l system based on the fractal . at the same time , we compare the two methods from the application of tree modeling in 3d cis and give the class definition of tree object from the object oriented point of view , in order that the tree object can be applied in 3d gis . all this research find a new and effective way for the visualization of tree in 3d gis 同時(shí),針對(duì)樹木實(shí)體在3dgis中的應(yīng)用,對(duì)兩種建模方法進(jìn)行比較,確定l系統(tǒng)是3dgis中構(gòu)建樹木實(shí)體的最佳方法,并從面向?qū)ο蠼嵌瘸霭l(fā),給出基于l系統(tǒng)的樹木實(shí)體類,從而使樹木實(shí)體作為3dgis中的對(duì)象之一融合到系統(tǒng)之中,為3dgis領(lǐng)域中關(guān)于樹木實(shí)體的表達(dá)尋找到一條新的而且是更有效的解決途徑。
I apply the modified double - iterated modeling algorithm to realize the three - dimension tree model successfully based on l - system with ips . to realize the terrain model , i expound the improved diamond - square algorithm in light of fractal interpolation and use it to model cloud , two - dimension texture terrain surface and three - dimension terrain 基于l系統(tǒng)以及迭代函數(shù)系統(tǒng)的特性提出了改進(jìn)的三維樹木模型雙迭代生成算法來實(shí)現(xiàn)三維樹木模型的模擬,而在三維地貌模型的模擬中,提出了改進(jìn)的基于分形插值的diamond - square算法實(shí)現(xiàn)了云團(tuán)、二維紋理地表、三維地形等模型。