anchor.diff:  osgvertexprogram
   
   echo osgwindows
  -osgwindows cow.osg
  +osgwindows
  
positive.code: osgtext
  
  echo osgtexture1D
  osgtexture1D dumptruck.osg
  
  echo osgtexture2D
  osgtexture2D
  
negative.code: osgspotlight
  
  echo osgstereoimage
  osgstereoimage
  
  echo osgteapot
  osgteapot
  