实时多波束海底地形数据三维瀑布图绘制方法

摘要

针对深水多波束测深数据的特点和实时显控的需求,提出了一种通过内存缓存技术以队列方式有效组织多Ping海底测深数据,采用局部更新技术提高数据更新效率,利用查表方法减少顶点高程赋色计算代价,进而结合VBO技术加速渲染过程的实时多波束海底地形探测数据三维瀑布图快速绘制方法,并在三维瀑布图实时绘制过程中实现了支持平移、旋转和缩放等交互操作.对实际多波束海底地形探测数据实时绘制的实验结果表明,该方法高效、稳定、光照效果佳,能很好地满足多波束海底地形探测数据的实时显控需求.%A real-time 3D waterfall fast rendering approach for multibeams submarine topography exploration data is proposed in light of the feature of deepwater muhibeams depth-detection data and the demand in real-time display-control system. The approach effectively organises the multi-Ping submarine depth-detection data in a way of queue by using memory caching technique, speeds up data updating efficiency by adopting local update technique, reduces the lime of calculating the colour of vertex through checking the colour list, and further accelerates the rendering process in combination with VBO technique. Moreover, in the process of real-time rendering the 3D waterfall, the approach has realised the interactive operations supporting translation, rotation and zooming. Experiment result on real-time rendering using practical multibeams submarine topography exploration data shows that the approach is efficient and stable, has good illuminated effect, so that it can well satisfy the demand of real-time display-control system of multibeams submarine topography exploration data.