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

A three-dimensional flow field and algorithm technology, applied in the field of scientific computing visualization, can solve problems such as difficulty in real-time interaction, occlusion by icon method, and inapplicability of three-dimensional flow field visualization.

Active Publication Date: 2015-08-26
OCEAN UNIV OF CHINA
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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 proble

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

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Embodiment Construction

[0012] The invention distributes particles uniformly and densely in the three-dimensional flow field, the sampling velocity field drives the particle movement, and creates a probability density map to control the particle distribution; integrates in the Tessellation Shader to expand the streamline based on the particle position; finally uses Phong / Blinn illumination The model illuminates the streamline to improve the spatial perception of the three-dimensional streamline. It includes the following steps:

[0013] 1. Realize the movement of particles in the three-dimensional flow field through the transform feedback mechanism of GPU, and use the radial basis function to design the density ball to control the distribution density of the particles in the three-dimensional flow field.

[0014] New particles are randomly and uniformly distributed in the three-dimensional flow field. The properties of the particles include position and age. The age of the initial particles are all 0, a...

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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...

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Application Information

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IPC IPC(8): G06T17/20G06T15/00G06T15/50
Inventor 田丰林陈戈曲德源
Owner OCEAN UNIV OF CHINA
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