基于粒子系统和雾化的实时降雪模拟

Real-Time Snowfall Simulation Based on Particle System and Pulverization

实时的降雪模拟在虚拟环境中是不可少的,真实地模拟降雪过程能够增强虚拟环境的沉浸感和深度感。本文从计算机模拟的角度对降雪过程进行了分析,基于粒子系统理论抽象出雪粒子的动态属性和静态属性;对有风和无风时雪花运动进行了模拟,给出了无风、阵风和稳定风的运动模型;针对降雪过程中产生的雪尘以及雪花落地的积雪现象,提出将雾化效果应用到降雪的虚拟环境的方法。实验表明,本文采用的降雪及雾化模拟方法实时性好,模拟效果真实,适合应用于实时渲染的虚拟环境中。

It is necessary to simulate real-time snowfall in virtual environment,really simulate snowfall process can enhance the immersion and the depth perception of virtual environment.Snowfall process is analyzed from the perspective of computer simulation in the paper,the dynamic attribute and the static attribute of snow particles are Abstracted based on particle system theory.Under wind and no wind,the Snow movement is simulated.To solve the problem of the blur of snowing environment and firn phenomena,the paper puts forward a method of applying pulverization to snowing virtual environment The tests show that the snowfall and pulverization simulation methods are effective and real,which are suit for real-time virtual environment.