opacity setting for shapes
marching cube stuff for cube file render - work in progress
initial stab at rendering volumetric input data using marching cubes
better marching cube linear interpolation
better marching cube linear interpolation
Removed extraneous loop
Smoother voxel rendering
fixed linear interp, hard vertex normals for blocky voxel render
modified cube corner numbering to match proteinsurface
smooth voxel rendering
Working on transparency striping issues
fixed transparency rendering to remove ordering artifacts (stripes)
Merge pull request #9 from nbr2/master

volumetric data, voxels, transparency bug fix