Three-dimensional streamline dynamic visualization algorithm facing irregular ocean flow field data

An irregular and streamlined technology, applied in the field of 3D streamline dynamic visualization algorithm, which can solve problems such as less than ideal and realistic effect of slow streamline drawing, and achieve the effect of clear and vivid streamline structure.

Inactive Publication Date: 2015-05-27
OCEAN UNIV OF CHINA
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Problems solved by technology

[0005] The current streamline visualization technology is relatively slow in the speed of s

Method used

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  • Three-dimensional streamline dynamic visualization algorithm facing irregular ocean flow field data
  • Three-dimensional streamline dynamic visualization algorithm facing irregular ocean flow field data
  • Three-dimensional streamline dynamic visualization algorithm facing irregular ocean flow field data

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Embodiment Construction

[0018] The specific implementation of the present invention will be given below in combination with the streamline generation process and the drawings in the description.

[0019] Mesh Modeling Based on Tetrahedral Irregular Flow Field Data Control

[0020] For irregular flow field data, it is necessary to construct an unstructured tetrahedral grid. Unstructured tetrahedral grids have no regular topology and no concept of transformation of horizontal coordinates, so they are flexible. Unlike other structured grids, in addition to storing the coordinates of each point, it also needs to save the geometric connection relationship of the grid. In the initialization stage, a hexahedron grid is constructed for the irregular three-dimensional flow field data, and then the tetrahedron is divided into six tetrahedrons. According to the user's needs, customize the resolution of the grid, and then guide the resolution of the streamline, so that it will not be too messy. In order to sp...

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Abstract

The invention belongs to the field of marine information technology and computer visualization, in particular relates to a three-dimensional streamline dynamic visualization algorithm facing irregular ocean flow field data. The algorithm comprises the following steps: firstly establishing a tetrahedral control network based on the irregular flow field data, and obtaining a streamline prototype of a three-dimensional flow field through a seed point generating algorithm based on spatial distribution probability and a Runge-Kutta second-order integral algorithm based on dynamic adaptive integration step; on that basis, compiling GPU drawing codes and performing real-time dynamic rendering treatment to the streamline through a Geometry Shader to obtain dynamic lifelike streamline visual representation capable of quantitatively expressing information such as flow rate and flow direction of the irregular flow field. The algorithm provided by the invention can be used for dynamic visual analysis and expression on various irregular ocean flow field pattern data such as POM pattern data, the streamline and path line of measured data and the like, and has the characteristics of being high in stability and feasibility to solve urgent practical problems and the like.

Description

technical field [0001] The invention belongs to the field of marine information technology and computer visualization, and in particular relates to a three-dimensional streamline dynamic visualization algorithm for irregular ocean flow field data. Background technique [0002] In his 1987 definition of scientific visualization, American computer scientist Bruce McCormack first articulated the goals and scope of scientific visualization: "The use of computer graphics to create visual images that help people understand scientific and technological concepts or results digital representations that are intricate and often massive in scale". In the classification of computer science, the technology that uses the perception ability of human eyes to interactively express data to enhance cognition is called visualization. It converts invisible or difficult-to-display data into perceivable graphics, symbols, colors, textures, etc., enhancing data recognition efficiency and delivering...

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Application Information

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IPC IPC(8): G06T13/60
CPCG06T13/60G06T2200/04
Inventor 纪鹏波陈戈田丰林苏琪
Owner OCEAN UNIV OF CHINA
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