一种基于WebGL的矢量场轨迹绘制方法

A Vector Field Trajectory Drawing Method Based on WebGL

风场洋流数据具有数据量大、结构复杂且随时间变化等特点,可以使用粒子系统法,通过粒子的生成和粒子轨迹(矢量线)的绘制来模拟风场的运动和变化。文章使用粒子系统法对风场数据进行了可视化。同时,针对WebGL中不同视野高度下粒子轨迹宽度不一致问题,提出了一种基于视高的粒子轨迹宽度自适应计算方法。实验结果表明,采用该文的粒子轨迹绘制优化方法对矢量场数据进行可视化时产生的粒子轨迹过渡平滑,轨迹线宽保持一致,极大地改善了可视化效果。

Wind ocean current data has the characteristics of large amount of data,complex structure,and changes over time.The particle system method can be used to simulate the movement and change of wind field through particle generation and particle trajectory(vector line)drawing.This paper uses particle system method to visualize wind field data.At the same time,aiming at the inconsistency of particle trajectory width under different visual field heights in WebGL,an adaptive particle trajectory width calculation method based on visual field height is proposed.Experimental results show that using the particle trajectory drawing optimization method presented in this paper to visualize vector field data produces a smooth transition of particle trajectories,maintaining consistent trajectory linewidth,and greatly improving the visualization effect.