Application of a Hardware Rasterizer in Problems of Modeling Hydrodynamic Fields in Trawl Systems During Hydrolocation

Abstract

The paper proposes a fast method for rebuilding a three-dimensional computational grid for problems of modeling hydrodynamic fields in trawling systems during sound ranging at runtime using a hardware rasterizer of a graphics processor. When the position of a streamlined object changes, it is necessary to periodically update the boundary conditions at the grid nodes near its surface, which, in case of three-dimensional statement, is a laborious task. The suggested method allows a multiple acceleration of the grid update process compared to software implementations. The essence of the method lies in implementation of the pixel shader of the graphics pipeline during rendering, namely, the possibility of outputting the grid nodes into a 3D buffer taking into account information about Z-coordinate of a pixel and a velocity vector of a surface point. The method has been approved using a computer program developed on its basis. The method can be applied both in calculating the influence of hydrodynamic fields on propagation of acoustic waves, and in other applications.