Real-Time Simulation of Rain in 3D Terrain SceneBased on Particle Systems
基于粒子系统的三维场地降雨实时模拟

During the course of present investigation,a method for simulating the rain in 3D terrain scene in the real time is proposed,using particle systems. The applicable attributes have been analyzed with reference to the rain particle system and the rain particles, in accordance with the basic principles of particle systems. Methodological approach includes the employment of feasible techniques or algorithms such as defining a cube outside the top of the view frustum as the generation shape of rain particles, using a point in pixels and a subsequent line as the shape of a rain particle,simulating the gravity influence in the course of rain particles' put down,replenishing continuously rain particles using particle groups and, testing the fall heights of rain particles in the real time etc. The results of experimentation have proved that this method is more effective in the representation of rain in 3D terrain scene which also found to be realistic at the time of satisfying basic need of real time interactive navigation.