用图象平面分割方法实现非规则数据场体绘制

A PARTITION APPROACH FOR VOLUME RENDERING3D IRREGULAR DATA FIELD

本文给出了一种对非规则数据场进行体绘制的方法。该方法通过分割图象平面，相应划分数据场中体元，同时利用数据场体元间的相邻关系来提高光线与体元的求交效率，从而加速绘制。该方法具有自适应性。

Volume rendering is a technique for visualizing 3D scalar or vector data field in the area of Visualization in Scientific Computing(ViSC).Intersecting and visibility ordering are key problems that affect the efficiency of volume rendering,especially when the grid of data field is irregular.In this paper,a partition approach for direct volume rendering of the irregular data field is given.In this approach,the image plane is partitioned and the current boundary cell set is divided correspondely.By exploiting the characteristic of adjacency the efficiency of intersecting is increased,therefore the rendering is speed up.The implementation of the approach,together with some results are given in this paper.