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基于噪声的树叶自然运动模拟技术研究
林艳梅, 何东健
西北农林科技大学 信息工程学院
摘要:
为实现叶子在风中具有真实感的运动虚拟,探讨了叶子的几何模型和基于1/fβ 噪声的单片树叶的自然运动模拟方法,即将叶柄和叶片分别近似为圆柱体和多边形,用实际叶面图像通过纹理映射得到叶子形态结构模型;在分析分形布朗运动的基础上,用1/fβ 噪声模拟自然风,并因此控制叶柄与叶片的运动。虚拟结果表明,该技术很好地表现了树叶运动的整体性和真实感。提示基于噪声的模拟技术,可用于树叶自然运动的模拟。
关键词:  树叶  运动虚拟  1/fβ 噪声  纹理映射技术
DOI:
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基金项目:陕西省自然科学基金项目(2004D12)
Research on natural movement simulation of leaf based on noise
Abstract:
To simulate the real motion of leaf in the wind,this paper discussed the geometric model of leaf and the natural motion simulation method of individual leaf based on 1/fβ noise,the morphological model of leaf was made by approximating leafstalk and laminae to cylinder and polygon and applying Texture Mapping to actual leaf image;the natural wind was simulated with 1/fβ noise to control the motion of leafstalk and laminae based on analysis of fractal Brownian motion.The simulation result indicates that the technigue displays the integrity and reality of leaf’s motion nicely.It is show that the technique based on noise can be applied to natural morvment simulation of leaf.
Key words:  leaf  motion virtual  1/fβ noise  texture mapping technique