基于重复纹理映射的动态云实时模拟研究

Real-time Simulation of Dynamic Cloud Based on Repeating Texture Mapping

云是一种常见、普遍的自然现象,云的建模和渲染是计算机图形学领域的一个难点问题。利用重复纹理映射技术将多幅二维纹理图片加以组合,对三维动态云进行建模,通过瞬时对云进行平移、缩放等操作来模拟云的动态变化,进一步采用Alpha色彩融合技术模拟动态云的聚集、消散以及受到风力影响后云的形态变化等效果,通过采用多层重复纹理映射的叠加模拟层云,取得了很好的动态云模拟效果。所提出的动态云的建模方法简单,避免了大量繁琐的计算,提高了动态云的生成速度,满足了动画等应用场景中对动态云的实时性要求。实验结果验证了所提出的动态云建模方法和渲染生成方法的有效性。

Cloud is a common,widespread natural phenomenon,cloud modeling and rending are a difficult problem in the field of computer graphics.This article used Repeat Texture Mapping to make up multiple 2D texture images for mode-ling 3D dynamic cloud,through the instantaneous translation of the cloud,zooming and other operations to simulate the dynamic changes of cloud,further used alpha color fusion technique to simulate dynamic cloud gather,dissipation and the cloud form changes after the effect of wind,by using the superposition of multilayer repeat texture mapping to simulate the effect of layer cloud and obtain good simulation of the dynamic effect of cloud.The proposed modeling dynamic cloud method is simple,avoids a large number of tedious calculations,improves the speed of dynamic cloud generation and meets the animated scenarios for dynamic applications such as real-time requirements of cloud.The experimental results validate the correctness of the proposed method of Dynamic Cloud Modeling and rendering generation.