Approximate volume rendering for curvilinear and unstructured grids by hardware-assisted polyhedron projection

A hardware polygon rendering pipeline can be used with hardware compositing to volume render arbitrary unstructured grids composed of convex polyhedra l cells. This technique is described, together with the global sorting nece ssary for back-to-front compositing, and the modifications that must be mad e to approximate curvilinear cells, whose faces may not be planar. (C) 2000 John Wiley & Sons, Inc.