D:\VTK\VTK\GenericFiltering,D:\VTK\VTK\Common,D:\VTK\VTK\IO,D:\VTK\VTK\Filtering,D:\VTK\bin,D:\VTK\VTK\Rendering,D:\VTK\VTK\Graphics,D:\VTK\VTK\VolumeRendering,D:\VTK\VTK\Imaging,D:\VTK\VTK\Hybrid,D:\VTK\VTK\GUISupport,D:\VTK\VTK\include\vtk-5.0,D:\

这篇教程介绍一种利用OpenGL点精灵，也就是PointSprite来实现云的模拟。包括PFD教程和源代码

This is a PPT file, which describes the RayCasting algorithm in detail. For different data, it gives different optimizing methods. In the RayCasting, there are Image-based and Object-based. Usually, we can use Early Exit / Empty Skipping / Adaptive