Visualization of 2D and 3D vector field
Dongquan Liu · Jisuanji yingyong yanjiu · 2011
For two-dimensional vector field,the current methods of vector field visualization only provide the information about direction but not intensity.In addition,for the three-dimensional vector field,the vector field visualization result is not encou-raging.This paper achieved two-dimensional and three-dimensional vector field visualization by the line integral convolution.This paper extended the idea of Bresenham line drawing algorithm to track the streamline on two-dimensional plane and in three-dimensional space.For each point either in the two-dimensional or the three-dimensional vector field,the method would establish a two-dimensional or a three-dimensional table,respectively,to store the location of its previous and also next points along the streamline to remove the redundancy occurred from conventional streamline tracking methods.For the two-dimensional vector field,applied the color transparency to the gray-scale LIC image and color coded motion amplitude image to enhance the motion strength on display.For the three-dimensional vector field,used LIC to get the output texture pixels and the ray casting volume rendering method had been used to show the three-dimensional image.Simulation results show that patterns in the two-dimensional vector field and also in the three-dimensional vector field can be visualized clearly and intuitively.