Large-range dynamic wave real-time rendering method based on stream computing

Abstract

The invention discloses a method for achieving large-range dynamic wave efficient real-time rendering on a stream processor. According to the method, a novel grid model based on the LOD (Level of Detail) technology is involved, dynamic wave simulation is achieved based on a Gerstner model, a concave and convex texture mapping method accelerates remoter wave rendering, and animation concave and convex textures are utilized for improving the wave rendering effect. The method is characterized in that the reflecting effect on the sky and the sun is achieved through the cube textures, a Phong illumination model is applied to achieve wave illumination and achieve Fresnel reflection, the animation textures are adopted for simulating foam in waves, and the special effects such as shadows, projected onto the sea surface, of clouds are achieved. The method can carry out real-time interactive rendering on waves within the hundred-kilometer-level range on a computer platform with the stream processor, and has the advantages that the speed is high, the simulation degree is high, and platform compatibility is good.

Description

technical field [0001] The present invention is related to computer graphics. With the rapid progress of GPU technology, the performance and programmability of GPU have been greatly improved, providing an important hardware platform for the development of graphics. The present invention relates to a stream-based computing platform A real-time rendering method for large-scale dynamic natural scenes of GPU-ocean waves. Background technique [0002] About 70% of the earth's surface is covered by oceans. Compared with the simulation of other natural scenes, the rendering of ocean waves is more important in the application of flight simulation and surface ship simulation. For the research on ocean wave rendering, the methods used can be summed up It can be divided into two categories: methods based on physical models and methods based on structures. The methods based on physical models generally start from the Navier-Stokes equations and try to simulate ocean waves by solving the...

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Problems solved by technology

The method based on the physical model is more suitable for small-scale and small-scale scenes such as fluid pouring and fountains, or for occasions that do not require real-time performance such as movies and animations. Since the solution of the Navier-Stokes equations is extremely complicated, even modern GPUs The computing performance has reached the level of TFLOPS, but it is still impossible to achieve interactive real-time rendering of large-scale dynamic ocean waves through this method. In real-time interactive applications, the prior method [1] (see Fournier A, Reeves W T. A simple model of coean waves. ACM SIGGRAPH Computer Graphics, 1986, 20(4): 75-84; Peachey D R. Modeling waves and surf. ACM SIGGRAPH Computer Graphics, 1986, 20(4): 65-74) The method is a commonly used construction method. By using function curves to simulate the geometric shape of ocean waves, the waveform of this method is easy to control and the speed is fast. The disadvantage is that the waveform is too regular and the sense of reality is poor. Requirements for properties. Prior methods [2] (see Fréchot J. Realistic simulation of ocean surface using wave spectrum. Proceedings of the First International Conference on Computer Graphics Theory and Applications, Setúbal: GRAPP, 2006: 76-83; Tessondorf J. Simulating ocean water. Computer Graphics Proceedings, Annual Conference Series, Los Angeles: ACM SIGGRAPH, 2001, 1-18; Ren Hongxiang, Yin Yong, Jin Yicheng. Realistic rendering of large-scale ocean wave scenes. Journal of Computer-Aided Design and Graphics, 2008, 20(12): 1617-1622) Based on statistics and spectrum methods, based on ocean statistics and empirical models of ocean observations, multiple sinusoids or fast Fourier transforms are used to synthesize waves conforming to the wave spectral distribution

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