【摘要】：動畫變形近年來在計(jì)算機(jī)圖形學(xué)領(lǐng)域中備受矚目,它在熱門的動漫制作、電影特效處理、建筑景觀仿真等方面都具有極大的發(fā)展?jié)摿蛻?yīng)用前景。本文重點(diǎn)研究的是以分形理論為基礎(chǔ)的動畫變形,將靜態(tài)的分形圖通過分形變形技術(shù)轉(zhuǎn)換成動態(tài)的分形分幀圖。具體工作如下： 利用分形迭代函數(shù)系統(tǒng)算法(IFS)繪制出自然界中具有分形特征的植物,通過調(diào)節(jié)帶參數(shù)的IFS吸引子來實(shí)現(xiàn)一種分形植物到另一種分形植物的靜態(tài)變形、分形樹在風(fēng)中搖曳的動態(tài)變形。研究結(jié)果表明,加入?yún)?shù)變量的IFS吸引子對圖形變形的控制能力非常穩(wěn)定,有效解決了分形變形過程中的圖形失真、中斷等問題,極大豐富了動畫變形技術(shù)、充實(shí)了分形理論。 提出了一種利用虛擬現(xiàn)實(shí)建模語言(VRML)對分形動畫進(jìn)行真彩渲染的新方法。相比傳統(tǒng)的IFS二維真彩分形圖,該方法能夠在三維空間對植物的外觀顏色進(jìn)行描述,并且具有簡單快速、占用內(nèi)存小、時(shí)間短、計(jì)算機(jī)可操作性強(qiáng)等優(yōu)勢。 改進(jìn)了傳統(tǒng)的L-系統(tǒng)算法,對一種基于VRML的交互式L-系統(tǒng)進(jìn)行研究,在虛擬現(xiàn)實(shí)環(huán)境中生成了三維分形植物圖。仿真表明改良后的方法生成的分形植物更加逼近真實(shí)世界的植物,實(shí)現(xiàn)了良好的虛擬現(xiàn)實(shí)交互功能。
[Abstract]:Animation deformation has attracted much attention in the field of computer graphics in recent years. It has great development potential and application prospect in hot animation production, film special effects processing, architectural landscape simulation and so on. In this paper, the animation deformation based on fractal theory is studied, and the static fractal graph is converted into dynamic fractal frame graph by fractal deformation technology. The concrete work is as follows: the fractal iterative function system algorithm (IFS) is used to draw the plants with fractal characteristics in nature, and the static deformation from one fractal plant to another is realized by adjusting the IFS attractor with parameters. The dynamic deformation of fractal trees swaying in the wind. The results show that the control ability of IFS Attractor with parameter variables to graphic deformation is very stable, which effectively solves the problems of graphic distortion and interruption in the process of fractal deformation, greatly enriches the animation deformation technology and enriches the fractal theory. A new method of true color rendering of fractal animation by using virtual reality modeling language (VRML) is proposed. Compared with the traditional IFS two-dimensional true color fractal graph, this method can describe the appearance color of plants in three-dimensional space, and has the advantages of simple and fast, small memory occupation, short time, strong computer maneuverability and so on. The traditional L-system algorithm is improved, and an interactive L-system based on VRML is studied. Three-dimensional fractal plant map is generated in virtual reality environment. The simulation results show that the fractal plants generated by the improved method are closer to the real-world plants and achieve good virtual reality interaction.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TP391.41;O189

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