Player Group Requirements:

Authouring / User Interface:
   -Two Windows: One of them is the Cockpit mode (through the lens) and the other is Control Tower View (with navigational cue.
   -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 of multiple volumetric functions.
   -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.  
   -Sub-sampling of high resolution data.
   -Parameters for interaction : 
      0. Set up a path or use default trajectory path.
      1. Interact with transfer function.
      2. Dynamically view the scenic spots.  
      3. Change the speed of motion.  More keyframe control.
   -Store the default transfer function and default path with the scenic spots in IVR with domain.
              
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)

Browser:
   -NMJ Domains are: 
      -pre-synaptic membrane (intra-nerve cellular domain)
      -pre-synaptic nerve cell membrane
      -between pre- and post-synaptic membrane (cleft subdomain which is the diffusion region and the region for locating the molecules)
      -the post-synaptic muscle membrane
      -below post-synaptic muscle membrane