GPU-based interactive ocean three-dimensional flow field dynamic visual algorithm

Abstract

The invention belongs to the field of scientific visualization, and particularly relates to a GPU-based interactive ocean three-dimensional flow field dynamic visual algorithm. The GPU-based interactive ocean three-dimensional flow field dynamic visual algorithm is based on the mode data of a regular grid. A uniform seed point placement algorithm in a three-dimensional flow field space is adopted. Furthermore a density ball which is designed by means of a Gauss function is mapped to multiple patterns for realizing uniform distribution of the seed points. Finally a streamline is generated by means of GPU accelerated rendering technology. Then the streamline is expanded to a pipe line by means of Tessellation technology, thereby realizing dynamic visual drawing for the ocean three-dimensional flow field. For improving spatial perception for the three-dimensional streamline, a Phong / Blinn illumination model is used for performing illumination processing on the streamline. Furthermore the GPU-based interactive ocean three-dimensional flow field dynamic visual algorithm is realized based on the GPU and has higher streamline generating efficiency and higher control efficiency.

Description

technical field [0001] The invention belongs to the field of scientific computing visualization, and in particular relates to a GPU-based interactive three-dimensional ocean flow field dynamic visualization algorithm. Background technique [0002] Flow field visualization is an important branch in the field of scientific visualization. With the improvement of computer computing capabilities, especially the improvement of GPU parallel processing capabilities and the abundance of observation data and model data, dynamic visualization of three-dimensional ocean flow fields has become possible. The 3D visualization of the flow field is of great significance to the study of the generation, development and extinction of ocean currents. Therefore, the visualization of 3D flow field has received more and more attention. However, the inherent characteristics of 3D flow field, such as large amount of data, many variables, and changes over time, pose a great challenge to our visualizat...

AI Technical Summary

Problems solved by technology

The icon method generally uses vector arrows. The direction of the arrow indicates the flow field velocity direction, and the velocity is mapped to the color space. The icon method has serious occlusion problems, and it is difficult to achieve real-time interaction; the texture method uses texture images to express the flow field Features, which are characterized by being able to express more details of the flow field such as: vortex, source point, saddle point, but the texture method still cannot solve the occlusion problem, and cannot express the internal structure of the three-dimensional flow field, so this method is more suitable for expressing two-dimensional flow field; the streamline placement algorithm based on feature extraction focuses on expressing a certain feature of the flow field, such as flow field topological information such as vortex, rather than expressing all flow field information, and this method requires a lot of preprocessing before visualization, so Not suitable for real-time interactive 3D flow field visualization

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