Dynamic two-dimensional vector field streamline visualization algorithm based on GPU (Graphics Processing Unit)

Abstract

The invention belongs to the field of scientific visualization, and particularly relates to a dynamic two-dimensional vector field streamline visualization algorithm based on a GPU (Graphics Processing Unit). The algorithm comprises the following steps: carrying out random distribution on particles in a vector field so that the particles move along with the vector field, and utilizing a geometry shader mechanism of the GPU to generate streamlines; generating the probability density graph of the vector field by calculating a radial basis function taking the particles as the center so as to control the generation, extinction and multiresolution distribution of the particles. According to the algorithm, the complete picture of the vector field is displayed in a streamline mode, so that the density, length, motion speed and smooth degree of the streamlines can be changed in real time; the streamlines are continuous and independent from one another, so that complicated characteristics of the vector field can be well dynamically displayed, and the cognitive purpose of visualization is achieved. Moreover, the algorithm is realized based on the GPU, and the generation and control efficiency of the streamlines is higher.

Description

technical field [0001] The invention belongs to the field of scientific calculation visualization, and in particular relates to a GPU-based dynamic two-dimensional vector field streamline visualization algorithm. Background technique [0002] With the development of detection technology and numerical simulation, large-scale and real-time data are becoming larger and larger, far exceeding the computing and analysis capabilities of CPUs, and hindering the progress of scientific research in many fields. With the advent of the era of high-performance computing, GPU provides a new technical means for big data visualization, which not only greatly improves the processing power, but also does not need to pay too much in terms of cost and power consumption. The maturity of the shading language enables people to conveniently and effectively process a large amount of vector field data and display it in a clear and intuitive form. [0003] There are many ways to visualize a two-dimens...

AI Technical Summary

Problems solved by technology

The point icon method is simple and intuitive, but it is not suitable for the vector field with dense sampling and abrupt changes; the texture method can reflect the structure of the entire vector field, but it is easy to produce blur and confusion; the vector line method uses the curve trend in space to describe the vector field

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