基于随机模型的雨景仿真

根据视频画面中雨滴的时间无关性假设，设计出雨景随机模型来实现三维视景中雨景的可视化仿真。该方法对仿真视景的单帧画面进行雨景建模，在雨滴的形状上采用简单几何线条模拟，在雨滴的颜色上采用前景背景混合的方法，在雨滴分布上采用随机分布模型，最后通过各帧画面连续快速播放的方法来达到雨景的可视化效果。

The Simulation of Rain Based on a Random Model

This paper introduces a method, which is based on the assumption of the independence of the vain strokes during period of time in video, to construct the raining scene in VR applications. The key point of this method is to build the raining model in every single frame ac- cording to the vandom theory and play all the frames sequentially and vapidly. Firstly we use simple line segments to simulate the shape of the vain strokes.Secondly we blend the background color with the rain stroke color to simulate the vain color.And lastly we calculate the position of each rain stroke randomly within a specific spatial area.