基于纹理映射的可漫游数据场建模与仿真

Modeling and Simulation of Roaming Volume Data Based on Texture Mapping

构建可漫游的数据场可以更好的、多方位的观察数据场可视化的结果,提出了一种基于纹理映射可漫游数据场的建模与仿真方法。这种方法首先构建数据场的模型,即定义视点后,合成从视点出发观察数据场的纹理,然后再将纹理映射到包围数据场的几何模型上,至此完成了可漫游数据场的建模过程,最后让观察者漫游数据场模型来进行仿真。对于既存在“外数据场”和“内数据场”的这一类数据场而言,采用文中的方法可以使得观察者不仅能漫游模型外部观察“外数据场”,还能漫游到几何模型内部观察“内数据场”的变化情况,因而使得文中的方法达到了很好可视化和仿真的效果。此外,当处理非规则场时,采用包围盒技术、基于线性八叉树的分割算法等来加速数据场的可视化过程,使得文中的算法有很高的效率。实验证明,文中的方法操作简单,效率高。

Constructing the volume data which can be roaming in it can be well observed from multi-orientation, A modeling and simulation method based on the texture mapping to the volume data which makes it be roaming in it is proposed, First, get of the model of volume data, that is to say, after define the viewpoint, map the texture onto the geometrical model which containing the volume data. Thus finish the modeling of the volume data which can he roaming in it. Finally, let the viewers navigate in the model so as to realize the simulation of the volume data. If there are ＂outside volume data＂ and ＂inside volume data＂, with this method, the viewers can not only navigate the ＂outside volume data＂, but also inside the model so that they can get the rules of the ＂inside volume data＂ which make this method have a better visualization, Besides, some methods to accelerate the visualization of the volume data are adopted, such as the hounding box method, Linear Octree Space Partitioning algorithm when processing irregular volume data. The results have proved that the method proposed is simple and efficient.