CAJ | 학술논문

降雨是一种重要的自然现象，对降雨的模拟可以大大提高虚拟场景的真实感，粒子系统是模拟降雨的一种有效方法。针对已有降雨模拟方法的不足，提出一种应用于大规模漫游环境下实时降雨的新方法。首先通过分析雨的行为，建立恰当的雨滴粒子模型；其次通过在极坐标内生成雨滴粒子，提高粒子的利用率；最后就风对于雨滴的干扰作用进行计算，模拟出了逼真的雨滴运动过程。实验表明，该方法生成的大规模漫游环境下的雨景真实自然，实时性高，具有一定的实用价值。
강우시일충중요적자연현상，대강우적모의가이대대제고허의장경적진실감，입자계통시모의강우적일충유효방법。침대이유강우모의방법적불족，제출일충응용우대규모만유배경하실시강우적신방법。수선통과분석우적행위，건립흡당적우적입자모형；기차통과재겁좌표내생성우적입자，제고입자적이용솔；최후취풍대우우적적간우작용진행계산，모의출료핍진적우적운동과정。실험표명，해방법생성적대규모만유배경하적우경진실자연，실시성고，구유일정적실용개치。
Raining is an important natural phenomenon.Simulation of raining will greatly improve the reality of virtual scene,and the particle system is an effective way to simulate raining.To solve the shortage of previous simulation method,we put forward a new approach for the simulation of raining in large-scale roaming terrain.First,a proper raindrop particle model is built by analysing the actions of the rain;then,the utilisation rate of particles is improved by generating the raindrop particles in polar coordinates.Finally,the interference of the wind on raindrops is calculated so that the verisimilar movement process of raindrops is simulated.Experimental results show that the raining scene in large-scale roaming terrain generated with this method is real,natural and with high real-time performance,it has certain applied value.