Real-time snowflake deposition simulation method based on particle system model

Abstract

The invention discloses a real-time snowflake deposition simulation method based on a particle system model. The real-time snowflake deposition simulation method is characterized in that snowflake particles are divided into computer-simulated falling snow particles and computer-simulated accumulated snow particles. The method comprises the following steps that: (1) when the snowflake deposition simulation is started, falling snow particles are established and drawn by a computer-simulated falling snow particle model, and the falling snow particles fall from random height circularly; (2) when the falling snow particles fall to a position which is a predetermined height away from a computer-simulated scene ground, a computer-simulated accumulated snow particle model is used for receiving coordinate information of the falling snow particles, and new accumulated snow particles are drawn through a computer at the coordinate position; and (3) dot deposition and surface deposition of the drawn accumulated snow particles are realized on the computer-simulated scene ground. By the method, influence on the falling of snowflakes caused by a wind speed, a wind direction and a gravity field is reflected through the coordinate transformation of the falling snow particles; and the method is high in real-time performance and allows people to feel reality.

Description

technical field [0001] The invention belongs to the technical field of real-world computer simulation, and in particular relates to a method for real-time simulation of snowflake deposition based on a particle system model. Background technique [0002] For the simulation of snow cover, in 1997 Nishita et al. used Metaball to construct and draw the snow cover scene, and simulated the scattering of light on the snow surface. In 1999, Premoze et al. considered the snow structure of the alpine mountains when they mapped the Alps, but due to the large size of the alpine mountains, the rendering effect was rough. In 2000, Fearnig introduced a complex snow model and stability model to construct snow expressed by geometric surfaces, and used it to draw the most beautiful virtual snow scene so far, but its modeling process and scene data are very complicated. Very slow. In 2004, Ohlsson et al. used the surface prediction algorithm to calculate the amount of snow at each grid on th...

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