关键词: 粒子系统, 噪声技术, 降雪, 优化, 背阴处积雪, 阴影

Abstract: Based on the analysis of the existing simulation method of snowfall and accumulated snow, this paper proposes a new way of setting the particle attribute. The snowfall process is optimized. It simulates the snow on the shady side of a building under the condition of the relatively stable wind innovatively, using the principle of the shadows. It takes snowfall and accumulated snow as two independent stages, using different methods to simulate respectively. Snowfall aspect, mainly adopts particle system, adding texture style as the attribute, and using the optimization techniques such as display list to improve rendering efficiency significantly. Accumulated snow aspect, introduces technology of noise, and connecting with the multistage particle system, recreates the state of no accumulated snow on the shady side of real life situations. Experiments show that the simulation effect is clear, with good real-time performance, suitable for application in the need for real-time rendering of virtual environments.

Key words: particle system, noise technology, snowfall, optimization, accumulated snow on the shady side, shadow