【摘要】： 計算機建模的目的是通過構造一個簡單的但能反映物理世界中真實對象的數(shù)學抽象描述模型來模擬被研究對象的生成、發(fā)展及變化的過程,從而為揭示現(xiàn)象、揭示機理、發(fā)現(xiàn)規(guī)律、預測未來、模擬外形提供有力的工具。植物是自然界最常見的景觀之一,其種類繁多,長勢千姿百態(tài),結構特征性很強,具有復雜的三維結構。三維植物模型有著廣泛的應用前景,可用于虛擬場景、虛擬試驗和虛擬農場、以及娛樂業(yè)、廣告、園林規(guī)劃甚至軍事仿真領域。本文是從園林規(guī)劃對植物建模的要求出發(fā),探討一種適用于園林場景的三維植物模型快速建立方法。 本文重點研究園林場景中對三維行道樹和草坪模擬的方法,主要目的是實現(xiàn)一種基于類別的快速而便捷的植物模擬手段。園林規(guī)劃設計工作中有對設計效果實時觀看的需要,但由于設計手段限制目前僅局限于對建筑物建模進行實時預覽,對園林植物尚沒有一種簡便易行的建模辦法。Maya軟件的Paint Effects模塊功能非常強大,筆刷庫中有著豐富的植物筆刷可以輕松實現(xiàn)很多炫目的效果;筆刷還可以與粒子系統(tǒng)配合,對大面積的植物進行建模。本文針對這些特點,深入分析與比較了各種三維植物建模方法,在實驗的基礎上提出了一種可行的基于類別的園林植物快速建模辦法。 本文主要研究內容有:首先是研究了目前植物模型的分類以及植物建模常用方法,對園林設計中植物模型的特點進行了分析。然后經過多次試驗找到了CAD模型導入Maya場景的辦法,為本研究方法的實現(xiàn)提供了可能性。接下來對根據設計圖特點分類模擬植物的方法進行了具體研究。行道樹的建模利用Paint effects植物筆刷和導入的道路曲線進行;草坪的建模研究則立足于對常用幾種方法的分析比較上,重點研究粒子與Paint Effects筆刷結合起來實現(xiàn)草坪的辦法。各種建模方法都用試驗進行了驗證,并分別給出了操作簡便易行性方面的評價。最后,用MEL腳本開發(fā)了一個三維植物模擬系統(tǒng),然后對用該法建立的三維植物模型的實際應用性進行了研究,證明本研究方法在園林設計領域有一定的適用性。
[Abstract]:The purpose of computer modeling is to construct a simple mathematical abstract description model which can reflect the real object in the physical world to simulate the process of generation, development and change of the object to be studied, so as to provide a powerful tool for revealing the phenomenon, revealing the mechanism, discovering the law, predicting the future and simulating the shape of the object. The three-dimensional plant model has a wide range of application prospects. It can be used in virtual scenes, virtual experiments and virtual farms, as well as entertainment, advertising, landscape planning and even military simulation. This paper is to model plants from landscape planning. Based on the requirements, a method for rapid establishment of 3D plant models suitable for garden scenes is discussed.
This paper focuses on the method of simulating 3D roadside trees and lawns in garden scenes. The main purpose of this method is to realize a fast and convenient plant simulation method based on category. The Paint Effects module of Maya software is very powerful. There are abundant plant brushes in the brush library that can easily achieve many dazzling effects. Brushes can also cooperate with particle systems to model large areas of plants. Various three-dimensional plant modeling methods are analyzed and compared, and a feasible fast modeling method based on category is proposed.
The main contents of this paper are as follows: Firstly, the classification of plant models and the common methods of plant modeling are studied, and the characteristics of plant models in landscape design are analyzed. Then, the method of introducing CAD model into Maya scene is found through many experiments, which provides the possibility for the realization of this research method. The modeling of the roadside tree is based on Paint effects plant brush and the road curve. The modeling of the lawn is based on the analysis and comparison of several commonly used methods. The method of combining particle and Paint Effects brush to realize the lawn modeling is emphasized. Finally, a three-dimensional plant simulation system was developed with MEL script, and then the practical application of the three-dimensional plant model was studied, which proved that the method has certain applicability in the field of landscape design.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2008
【分類號】：TP391.41

【引證文獻】

相關碩士學位論文 前1條

1 賀瞿;基于動力學原理的Maya粒子特效插件[D];上海交通大學;2011年

，

本文編號：2209162