Research On Hybrid Sea Surface Modeling Technology Based On Improved Height Field Objects

The virtual ocean science is a hot field for many scholars.In ocean scene modeling,the characteristics of virtual ocean are authenticity,real-time,immersion and interactivity.The focus of this paper is to enhance the real-time and realistic feeling of the mixed sea scene in the navigation scene.First,study and analyze the commonly used methods of sea surface simulation.Aiming at the problem of low realism due to the large amount of simulation calculations and multiple factors in the mixed sea surface in navigation simulator vision,came up with a semi-annular projection grid based on line-of-sight and an improved height field superposition method for FFT inversion to simulate sea surface.The method is aimed at reducing the amount of calculation,this method uses An Improvement of Sea Surface Mesh Model Using Semicircular Projection Grid to improve the sea surface mesh model,then improve the Phillips wave spectrum with reference to the influence of wind distance from the JONSOWP wave spectrum,its influence constant is improved,and the addition of Choppy wave and swell models to achieve the height field improvements in this article,and then through the texture mapping rendering technology to achieve a mixed sea surface simulation.Realize simulated sea scene and calculate drawing rate,to ensure the authenticity and real-time nature of the hybrid sea surface simulation.Second,study and analyze the commonly used wave foam simulation method.Aiming at the problem of time-consuming simulation of particle system and the repetitive problems caused by multiple factors in the simulation of wave foam,a simulation method using adaptive weighting method and dynamic texture mapping technology is proposed.The method first uses the adaptive multi-factor weight method to calculate the weight of its multi-factors,and uses the dynamic texture mapping method to judge its dynamic threshold,and then adds the improved texture value to the vertex of the mesh and renders them through the texture mapping.Get the final wave foam simulation.Realize the simulation of the wave foam under consideration of multiple factors,and satisfy the realism and complexity of the sea foam.Finally,study and analyze the simulation method of ship trails in hybrid sea surface.Aiming at the problem of large real-time performance in large-scale simulation of large-scale ship physical equations in navigation scenes,the improved height map method was proposed to simulate the Kelvin wake.As for the expense of a certain sense of reality,this method selects the Kelvin wake,solves the wave equation by finite element difference,and then adds the height map of the controllable waveform to realize ship wake simulation.To simulate the wake of a vessel in a simulated navigation scene,guaranteed the good realism and real-time performance of the vessel wake simulation in the visual scene.