[ 源代码： volpack ]
软件包：libvolpack1（1.0b3-9）
fast volume rendering library
VolPack is a software library for fast, high-quality volume rendering with this features:
* Renders data sampled on a regular, three-dimensional grid. * Supports user-specified transfer functions for both opacity and color. * Provides a shading model with directional light sources, multiple material types with different reflective properties, depth cueing, and shadows. * Produces color (24 bits/pixel) or grayscale (8 bits/pixel) renderings, with or without an alpha channel. * Supports arbitrary affine view transformations. * Supports a flexible data format that allows an arbitrary C structure to be associated with each voxel.