Abstract: This paper constructs visual simulation framework of antisubmarine combat. The sea surface mesh was modeled using projected grid and FFT technologies. Both the sea surface and undersea are finely rendered. The submarine fine rendering algorithm was implemented by considering refraction, Fresnel reflection, Godray and underwater fog effect and using Shader technology, so as to build a realistic battlefield environment. The method of interpolation processing for data in WGS84 coordinates of latitude and longitude through local area network was proposed; the displacement interpolation and rotation interpolation were implemented by calculating the ratio between the current timestamp and both before and after timestamp; the position and orientation interpolation processing was implemented by using the longitude and latitude data; and the control instructions were parsed and executed to control airplanes, submarines and other entities, so as to achieve antisubmarine combat visual simulation.

Key words: undersea scene, ocean rendering, shader, battle simulation