虚拟环境中海洋场景建模与绘制研究及实现

发布时间：2018-07-31 13:03

【摘要】：计算机动画的虚拟场景建模一直是计算机图形学领域具有挑战性的热点问题,无论在电影特技、广告,还是游戏、动漫等各个领域都有广泛的应用和发展的空间。水流模拟是自然景物模拟的一部分,正日益引起研究者的关注,与其它景物相比,由于水流的运动变化具有复杂性和不规则性而变的难以模拟。海洋场景的绘制作为水流模拟的一个分支,因其逼真的场景和宏大的场面已成为许多三维游戏以及影视特效中必不可少的组成部分。要准确的实现对海洋场景的动态仿真,不但要兼顾真实感和实时性,同时还要综合分析并优化海面仿真、天空的光照模型、场景渲染等功能模块。本文首先介绍了具有代表性的水流模拟方法并比较各自优缺点,在对流体动画和虚拟海洋场景建模与绘制方法的研究基础上,提出了用多重Perlin噪声的叠加和波浪粒子相结合的方法建立实时海洋动画场景。主要研究内容包括海面建模与绘制；海洋场景中船航行特效仿真；天空和海洋环境的光线效果模拟。主要工作如下：在对海浪特点进行研究的基础上,首先采用不同频率的Perlin噪声叠加生成噪声分型面,用波浪粒子和投影网格绘制技术模拟动态变化的海面；在对海面场景特效建模方面,采用波浪粒子来跟踪水波的运动,从而快速、简便的实现了水面上船运动产生的水波特效；为了得到更加逼真的海洋场景,采用天空球算法对天空进行绘制,引入了GPU加快海面渲染的计算速度,通过光线跟踪和二维纹理查找表实现天空和海面的光照效果,最后生成了交互的、真实感强的海洋场景。实验仿真结果表明,用该方法渲染的海洋场景具有很好的真实感和实时性。最后,总结和分析了本论文的研究工作,对虚拟海洋场景建模的研究方向提出几点想法和进一步展望。
[Abstract]:The virtual scene modeling of computer animation has always been a challenging hot issue in the field of computer graphics. It has wide application and development space in all fields such as movie stunt, advertisement, game, animation and so on. Flow simulation is a part of natural scene simulation, which is attracting more and more attention from researchers and other scenery. Compared with the complexity and irregularity of the movement of the flow, the rendering of the ocean scene is difficult to simulate. As a branch of the flow simulation, the rendering of the ocean scene has become an essential part of many three-dimensional games and the special effects of film and television because of its realistic scene and grand scene. The simulation should not only take into account the reality and real-time, but also comprehensively analyze and optimize the sea surface simulation, sky lighting model, scene rendering and other functions.
In this paper, the representative method of water flow simulation is introduced and its advantages and disadvantages are compared. On the basis of the research on fluid animation and virtual ocean scene modeling and drawing methods, the method of combining multiple Perlin noises and wave particles is proposed to establish real time marine animation scenes. The main research contents include the construction of sea surface. Simulation and Simulation of the effect of the ship in the ocean scene; the simulation of the light effect in the sky and the marine environment.
On the basis of the study of the characteristics of the sea waves, first of all, the Perlin noise superposition of different frequencies is used to generate the noise type surface, and the sea surface is simulated with the wave particle and the projection grid. The wave particles are used to track the water wave in the modeling of the special effect on the sea surface, thus the water surface is quickly and easily realized. In order to get a more realistic ocean scene, in order to get more realistic ocean scene, the sky ball algorithm is used to draw the sky. GPU is introduced to speed up the calculation speed of the sea surface rendering, and the light effect of the sky and the sea is realized through the ray tracing and the two-dimensional texture lookup table, and then the interactive and realistic ocean scene is generated most later. The simulation results show that the ocean scene rendered by this method is very realistic and real-time.
Finally, this paper summarizes and analyzes the research work of this paper, and puts forward some ideas and further prospects for the research direction of virtual ocean scene modeling.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TP391.41

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