Volume Rendering: refactored the leightweight triangle class to have 0-based parameter names
Volume Rendering: refactored the leightweight triangle class to have
0-based parameter names

--HG--
branch : v1-9

digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre