Modeling and Rendering of Ocean Battlefield Scenes

The realistic modeling and rendering of ocean battlefield scenes is one of hotspots and difficult problems of computer graphic. In all ocean battlefield scenes, modeling and rendering of ocean surface is the most difficult that it is dynamic in time, space and color. In this paper, considering the dynamic of ocean surface, an efficient view-dependent modeling and rendering method of large-scale ocean wave is presented. First, relying on a procedural ocean wave model, the method restricts computations to the visible part of the ocean surface with screen-subdivision algorithm, adapts the geometric resolution to the viewing distance: high resolution in near area and low resolution in far area. This yields real-time performances, even when the camera moves. Then, it also removes the link edge between ocean and land, the "border slit" on screen. Finally, the cost computation of vertexes and color of ocean wave is performed by the programmability of the modern GPU. Results show that the method is efficient and users can fly over ocean surface of digital globe in interactive rates on common PC graphics hardware.