虚拟场景中的实时降雪模拟

降雪是一种重要的自然现象,对降雪的模拟可以大大提高虚拟场景的逼真度。文中在分析粒子系统建模方法的基础上,给出了一种雪粒子模型,该模型对雪的物理模型进行了适当简化:通过控制雪粒子的大小、形状、密度(数量)来实现雪强度的模拟;通过控制雪粒子的运动来模拟风对雪的影响,并对雪粒子的产生域进行了讨论,使其满足视点运动的要求。实践表明,该粒子系统模型可在复杂的三维场景中实时地模拟降雪现象,仿真效果逼真。

Real-Time Simulation of Snowfall in Virtual Scene

Snowfall is an important phenomena of nature.Simulation of snowfall will improve lifelike qualities of virtual scene.In this paper,present a mode of snow based on analyzing particle systems.This mode simplified the attributes of real snow,this mode use size,shape and density of snows particle to simulate intensity of snow,and control movement of particle to simulate action of wind.At the same time,study the generation shape of snow particles and make it settle for the situation that the view is moved.The results of experimentation have proved that this method is more effective in the representation of snows in virtual scene.