Research And Implementation Of Ocean Current Visualization Technology Based On Improved Particle System

Nowadays,the ocean is very important in the pattern of national economic development.It plays a more prominent role in safeguarding national sovereignty,security and development interests.It plays a more significant role in the construction of national ecological civilization.Its strategic position in the international political,economic,military and scientific and technological competition is also rising.Through the extraction and processing of complex ocean data,combined with visualization technology,we can further study the law of ocean motion,and create favorable conditions for human exploration of the ocean.According to the data characteristics of current reanalysis products,this paper studies the visualization of current vector field based on particle system,and designs the visualization system of global current reanalysis products.The main research contents and achievements of this paper are as follows:First of all,based on the analysis of the current situation of current vector field visualization and particle system at home and abroad,this paper focuses on the technical process of current vector field visualization and analyzes the advantages,disadvantages and application scope of different methods of current vector field visualization.Finally,this paper chooses particle system to realize the global reanalysis product visualization.Secondly,the current particle system is realized.A large number of particles are used to reflect the general trend of the current.This paper describes the generation,initialization,movement and extinction of current particles,and finally realizes the visualization of current based on particle system.In this paper,the streamline generation method is studied,and an adaptive integral step length streamline generation method is realized.At the same time,the bilinear interpolation algorithm is used to compensate the missing data reasonably.At the same time,the low difference sequence of the Quasi Monte Carlo method is introduced into the current visualization,and the particle system is initialized by this method,and the flow lines with uniform distribution are drawn to obtain high-quality visualization effect.Then,in view of the problem of large amount of vector field data and slow rendering speed of streamline,parallel computing is adopted to improve the efficiency of calculation.Combined with the characteristics of current data,based on the data block parallelism,a parallel computing method is proposed,in which the static data partition and the dynamic particle number partition are considered simultaneously,so as to achieve load balance between processes.Experiments show that this method can speed up again on the basis ofparallel computing and improve the speedup ratio and efficiency to a certain extent.Finally,the reanalysis data used in this experiment is introduced,and the visualization system of global current reanalysis product is designed.The overall structure design and system function design of the system are described,and based on the previous algorithm improvement research,the rapid and efficient development of the ocean current reanalysis product visualization system is realized.In this system,this paper designs a simple interface display,using human-computer interaction function to improve the user experience effect,and get a good visual rendering effect.