View source for Isomics:VolumeRendering2008

=Todo list=
*full integration with mrml
*Improved support for transfer functions: 
**display the current one
**input field to name the current
**way to save/load a transfer funtion
**voxel values displayed in the slice views correspond to voxel values in transfer functions
**tool to look at gradient strengths to have input
**fixing texture mapping high resolution (Will Schroeder?)
*subvolume/cropping
*label maps:
**Use LUT to define the transfer function and render the label maps
**Use LUT to define roi properties for volume rendering grey scales.