Player Group Requirements:

Authouring:

   -Path Generation : interface for creating/editing the viewing path through the volume.
   -Multi-resolution contouring : interface for defining regions of interest for multi-resolution contouring.
   -Transfer function: interface for setting color and opacity of object
   -Isocontour value: capability of isocontour rendering
   -Geometry extraction: need to provide the geometry extraction feature for geometry model generation.
   -Volume genearation: we need to generate volume reversely.
	geometry -> volume : Generate volume data from geometries by sign distance function.
   	Point set data -> volume : PDB files etc.  By means of blurring.
   -Dynamic LOD : Refine geometries inside a viewing volume.  Similarily, simplify geometries outside the volume.
        
Player:
    		
   - Display along path 
   - Multi-resolution contouring : visualization of differently sampled volumes.
   - Transfer function: provide user interaction
   - Isocontour value: user can redefine the Isocontour rendering by adding and removing Isocontour values
   - Display Geometry: Player is capable of visualizing the combined volume & geometry model.
   - Dynamic LOD: Display LOD(level of detail)