一种渐进式平滑轨迹线标绘方法

为实现GIS系统和分布式仿真中运动轨迹线的绘制,提出一种基于Catmull曲线算法的渐进式标绘方法。本方法可根据定位点获得具有连续平滑性质的轨迹线,并随定位点的增加实现轨迹线延伸,延伸的轨迹线可与原轨迹线保持连续平滑性;通过曲线离散化参数调整轨迹线的平滑度;通过依赖于轨迹线的线性插值获取任意时刻的位置信息。实验结果表明,轨迹线标绘方法可以实现基于定位点的渐进式平滑标绘,添加一个定位点的计算时间可在0.1ms内完成。

Progressive Rendering Method for Smooth Trajectories

To render the trajectory curve for GIS or distributed simulation system,a progressive rendering method was proposed based on Catmull algorithm.The method could achieve the continuous smooth trajectory according to the tracking points.The trajectory could be extended with the increasing of the tracking points.The extended curve could keep the continuous smoothness with the original trajectory curve.The smoothness of the trajectory could be adjusted by the discretization parameters.The position of any given time could be extracted via linear interpolation algorithm depending on the trajectory.The experimental results denote that the method can achieve the progressive rendering of smooth trajectory.The processing for adding one tracking point can complete within 0.1ms.