Real-time rendering method for large-scale realistic snowscape

Abstract

The invention discloses a method for rendering a large-scale realistic snowscape in real time on a stream processor. According to the method, a snowflake model, a motion model of the snowflake model in the snowfall process, a random wind model generated through Perlin noise, and a snow accumulating and melting model are involved. The method is characterized in that the movement speed of wind is divided into average wind speed and random wind speed, calculation of a wind field is simplified, calculation results of the random wind speed are stored in 3D textures, a particle system based on a CPU is set up, and the 3D textures are used, so that the calculation loads of the particle system are reduced, and the rendering efficiency of the particle system is improved. The reality sense of the visual effect and the rendering efficiency are taken as the main research object, and the rendering method has the advantages of being high in speed, high in simulation degree and good in platform compatibility.

Description

Technical field [0001] The present invention is related to computer graphics. With the rapid advancement of streaming computing platform GPU technology, it provides an important hardware platform for the development of graphics. The present invention relates to a large-scale real-time rendering of snow scenes based on the streaming computing platform GPU. method. Background technique [0002] In the field of computer graphics, the realistic real-time rendering of natural scenes is an important research direction, including sky, water waves, clouds, trees, grass and other natural scenes are important objects of this kind of research. Natural scenery has its own characteristics according to the different seasons and geographical locations. In higher latitudes or high altitude areas, snow scenery is the most common natural scenery. Simulating the changes of snow scenes is a very challenging research topic. The main reason is that the accumulation and melting of snow are gre...

AI Technical Summary

Problems solved by technology

The present invention establishes a method for realizing real-time rendering of large-scale realistic snow scenes on a stream processor, and solves the problem of mutual constraints between the realism of visual effects and rendering efficiency. The method for real-time rendering of large-scale realistic snow scenes of the present invention first Establish a snowflake model and its motion model during snowfall; secondly, the speed of wind movement is divided into average wind speed and random wind speed, which simplifies the calculation of wind field, generates random wind through Perlin noise, and stores the calculation results in 3D texture In order to reduce the calculation load of the particle system; thirdly, establish a snow accumulation and melting model to realize the simulation of snow accumulation and melting; finally establish a GPU-based particle system to improve the rendering efficiency of the particle system.

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